make s3 endpoint configurable

update deps

.github/workflows/go.yml

@@ -0,0 +1,37 @@
+name: Go
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.22.x
+
+      - name: Build linux
+        run: make linux
+
+      - name: Build macos
+        run: make macos
+
+      - name: Test
+        run: make test
+
+      - name: Lint
+        run: make lint
+
+      - name: retrieve all tags
+        run: git fetch --prune --unshallow --tags
+
+      - name: Print changes since last version
+        run: git log $(git describe --tags --abbrev=0)..HEAD --no-merges --oneline

.github/workflows/release.yml

@@ -0,0 +1,62 @@
+name: release
+
+on:
+  push:
+    tags:
+      - "*.*.*"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.22.x
+
+      - name: Build linux
+        run: make linux
+
+      - name: Build macos
+        run: make macos
+
+      - name: Test
+        run: make test
+
+      - name: Lint
+        run: make lint
+
+      - name: Zip macos
+        run: zip -r reflector_darwin_amd64.zip ./dist/darwin_amd64
+
+      - name: Zip linux
+        run: zip -r reflector_linux_amd64.zip ./dist/linux_amd64
+
+      - name: retrieve all tags
+        run: git fetch --prune --unshallow --tags
+
+      - name: Generate Changelog
+        run: git log $(git describe --tags --abbrev=0 @^)..@ --no-merges --oneline > ${{ github.workspace }}-CHANGELOG.txt
+
+      - name: upload to github releases
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            ./reflector_linux_amd64.zip
+            ./reflector_darwin_amd64.zip
+          body_path: ${{ github.workspace }}-CHANGELOG.txt
+
+#      - name: Login to DockerHub
+#        uses: docker/login-action@v2
+#        with:
+#          username: ${{ secrets.DOCKERHUB_USERNAME }}
+#          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+#      - name: Generate docker image
+#        run: make image
+
+#      - name: Docker push
+#        run: make publish_image

.gitignore

@@ -1,3 +1,4 @@
 /vendor
 /config.json*
+/dist
 /bin

.travis.yml

@@ -1,12 +1,9 @@
 os: linux
-dist: trusty
+dist: bionic
 language: go
 
-env:
-  - GO111MODULE=on
-
 go:
-  - 1.11.x
+  - 1.22.x
 
 cache:
   directories:
@@ -17,22 +14,22 @@ notifications:
   email: false
 
 # Skip the install step. Don't `go get` dependencies. Only build with the code in vendor/
-install: true
+#install: true
 
 # Anything in before_script that returns a nonzero exit code will
 # flunk the build and immediately stop. It's sorta like having
 # set -e enabled in bash.
 before_script:
 # All the .go files, excluding vendor/ and model (auto generated)
-  - GO_FILES=$(find . -iname '*.go' ! -iname '*_test.go' -type f | grep -v /vendor/ )
-  - go get golang.org/x/tools/cmd/goimports                     # Used in build script for generated files
+  - GO_FILES=$(find . -iname '*.go' ! -iname '*_test.go' -type f | grep -v /vendor/ ) #i wish we were this crazy :p
+  - go install golang.org/x/tools/cmd/goimports                     # Used in build script for generated files
 # - go get github.com/golang/lint/golint                        # Linter
 #  - go get honnef.co/go/tools/cmd/megacheck                     # Badass static analyzer/linter
-  - go get github.com/jgautheron/gocyclo                        # Check against high complexity
-  - go get github.com/mdempsky/unconvert                        # Identifies unnecessary type conversions
-  - go get github.com/kisielk/errcheck                          # Checks for unhandled errors
-  - go get github.com/opennota/check/cmd/varcheck               # Checks for unused vars
-  - go get github.com/opennota/check/cmd/structcheck            # Checks for unused fields in structs
+  - go install github.com/fzipp/gocyclo/cmd/gocyclo@latest                 # Check against high complexity
+  - go install github.com/mdempsky/unconvert@latest                        # Identifies unnecessary type conversions
+  - go install github.com/kisielk/errcheck@latest                          # Checks for unhandled errors
+  - go install gitlab.com/opennota/check/cmd/varcheck@latest               # Checks for unused vars
+  - go install gitlab.com/opennota/check/cmd/structcheck@latest            # Checks for unused fields in structs
 
 
 
@@ -40,7 +37,7 @@ before_script:
 # in a modern Go project.
 script:
   # Fail if a .go file hasn't been formatted with gofmt
-  - test -z $(gofmt -s -l $GO_FILES)
+  - for i in $GO_FILES; do test -z $(gofmt -s -l $i); done
   # Run unit tests
   - make test
   # Checks for unused vars and fields on structs
@@ -59,11 +56,11 @@ script:
   # one last linter - ignore autogen code
   #- golint -set_exit_status $(go list ./... | grep -v /vendor/ )
   # Finally, build the binary
-  - make
+  - make linux
 
 deploy:
   - provider: s3
-    local_dir: ./bin
+    local_dir: ./dist/linux_amd64
     skip_cleanup: true
     on:
       repo: lbryio/reflector.go
@@ -73,11 +70,11 @@ deploy:
       secure: "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"
     bucket: "lbry-reflector-binary"
 
-  - provider: releases
-    file: ./bin/prism-bin
-    skip_cleanup: true
-    on:
-      repo: lbryio/reflector.go
-      tags: true
-    api_key:
-      secure: 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
+#  - provider: releases
+#    file: ./bin/prism-bin
+#    skip_cleanup: true
+#    on:
+#      repo: lbryio/reflector.go
+#      tags: true
+#    api_key:
+#      secure: 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

Dockerfile

@@ -0,0 +1,9 @@
+FROM alpine
+EXPOSE 8080
+
+RUN mkdir /app
+WORKDIR /app
+COPY dist/linux_amd64/prism-bin ./prism
+RUN chmod +x prism
+
+ENTRYPOINT [ "/app/prism" ]

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2016-2018 LBRY Inc
+Copyright (c) 2016-2020 LBRY Inc
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish,distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

Makefile

@@ -1,25 +1,33 @@
+version := $(shell git describe --dirty --always --long --abbrev=7)
+commit := $(shell git rev-parse --short HEAD)
+commit_long := $(shell git rev-parse HEAD)
+branch := $(shell git rev-parse --abbrev-ref HEAD)
+curTime := $(shell date +%s)
+
 BINARY=prism-bin
-
-DIR = $(shell cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)
-BIN_DIR = ${DIR}/bin
 IMPORT_PATH = github.com/lbryio/reflector.go
+LDFLAGS="-X ${IMPORT_PATH}/meta.version=$(version) -X ${IMPORT_PATH}/meta.commit=$(commit) -X ${IMPORT_PATH}/meta.commitLong=$(commit_long) -X ${IMPORT_PATH}/meta.branch=$(branch) -X '${IMPORT_PATH}/meta.Time=$(curTime)'"
+DIR = $(shell cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)
+BIN_DIR = $(DIR)/dist
 
-VERSION = $(shell git --git-dir=${DIR}/.git describe --dirty --always --long --abbrev=7)
-LDFLAGS = -ldflags "-X ${IMPORT_PATH}/meta.Version=${VERSION} -X ${IMPORT_PATH}/meta.Time=$(shell date +%s)"
-
-
-.PHONY: build clean test lint
-.DEFAULT_GOAL: build
-
-
-build:
-	mkdir -p ${BIN_DIR} && CGO_ENABLED=0 go build ${LDFLAGS} -asmflags -trimpath=${DIR} -o ${BIN_DIR}/${BINARY} main.go
-
-clean:
-	if [ -f ${BIN_DIR}/${BINARY} ]; then rm ${BIN_DIR}/${BINARY}; fi
+.DEFAULT_GOAL := linux
 
+.PHONY: test
 test:
-	go test ./... -v -cover
+	go test -cover -v ./...
 
+.PHONY: lint
 lint:
-	go get github.com/alecthomas/gometalinter && gometalinter --install && gometalinter ./...
+	./scripts/lint.sh
+
+.PHONY: linux
+linux:
+	GOARCH=amd64 CGO_ENABLED=0 GOOS=linux go build -ldflags ${LDFLAGS} -asmflags -trimpath=${DIR} -o ${BIN_DIR}/linux_amd64/${BINARY}
+
+.PHONY: macos
+macos:
+	GOARCH=amd64 GOOS=darwin go build -ldflags ${LDFLAGS} -asmflags -trimpath=${DIR} -o ${BIN_DIR}/darwin_amd64/${BINARY}
+
+.PHONY: image
+image:
+	docker buildx build -t lbry/reflector:$(version) -t lbry/reflector:latest --platform linux/amd64 .

cluster/cluster.go

@@ -1,14 +1,14 @@
 package cluster
 
 import (
-	"io/ioutil"
+	"io"
 	baselog "log"
 	"sort"
 	"time"
 
-	"github.com/lbryio/lbry.go/extras/crypto"
-	"github.com/lbryio/lbry.go/extras/errors"
-	"github.com/lbryio/lbry.go/extras/stop"
+	"github.com/lbryio/lbry.go/v2/extras/crypto"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
 
 	"github.com/hashicorp/serf/serf"
 	log "github.com/sirupsen/logrus"
@@ -52,7 +52,7 @@ func (c *Cluster) Connect() error {
 	conf.MemberlistConfig.AdvertisePort = c.port
 	conf.NodeName = c.name
 
-	nullLogger := baselog.New(ioutil.Discard, "", 0)
+	nullLogger := baselog.New(io.Discard, "", 0)
 	conf.Logger = nullLogger
 
 	c.eventCh = make(chan serf.Event)

cmd/cluster.go

@@ -6,7 +6,8 @@ import (
 	"strconv"
 	"syscall"
 
-	"github.com/lbryio/lbry.go/extras/crypto"
+	"github.com/lbryio/lbry.go/v2/extras/crypto"
+
 	"github.com/lbryio/reflector.go/cluster"
 
 	log "github.com/sirupsen/logrus"

cmd/decode.go

@@ -0,0 +1,55 @@
+package cmd
+
+import (
+	"encoding/hex"
+	"fmt"
+
+	"github.com/lbryio/lbry.go/v2/schema/stake"
+
+	"github.com/davecgh/go-spew/spew"
+	"github.com/gogo/protobuf/jsonpb"
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	var cmd = &cobra.Command{
+		Use:   "decode VALUE",
+		Short: "Decode a claim value",
+		Args:  cobra.ExactArgs(1),
+		Run:   decodeCmd,
+	}
+	rootCmd.AddCommand(cmd)
+}
+
+func decodeCmd(cmd *cobra.Command, args []string) {
+	c, err := stake.DecodeClaimHex(args[0], "")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	m := jsonpb.Marshaler{Indent: "  "}
+
+	if stream := c.Claim.GetStream(); stream != nil {
+		json, err := m.MarshalToString(stream)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Println(json)
+		fmt.Printf("SD hash as hex: %s\n", hex.EncodeToString(stream.GetSource().GetSdHash()))
+	} else if channel := c.Claim.GetChannel(); channel != nil {
+		json, err := m.MarshalToString(channel)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Println(json)
+	} else if repost := c.Claim.GetRepost(); repost != nil {
+		json, err := m.MarshalToString(repost)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Println(json)
+	} else {
+		spew.Dump(c)
+	}
+}

cmd/dht.go

@@ -8,8 +8,8 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/lbryio/lbry.go/dht"
-	"github.com/lbryio/lbry.go/dht/bits"
+	"github.com/lbryio/lbry.go/v2/dht"
+	"github.com/lbryio/lbry.go/v2/dht/bits"
 
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"

cmd/getstream.go

@@ -0,0 +1,80 @@
+package cmd
+
+import (
+	"encoding/hex"
+	"os"
+	"time"
+
+	"github.com/lbryio/reflector.go/server/peer"
+	"github.com/lbryio/reflector.go/store"
+
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	var cmd = &cobra.Command{
+		Use:   "getstream ADDRESS:PORT SDHASH",
+		Short: "Get a stream from a reflector server",
+		Args:  cobra.ExactArgs(2),
+		Run:   getStreamCmd,
+	}
+	rootCmd.AddCommand(cmd)
+}
+
+func getStreamCmd(cmd *cobra.Command, args []string) {
+	addr := args[0]
+	sdHash := args[1]
+
+	s := store.NewCachingStore(
+		"getstream",
+		peer.NewStore(peer.StoreOpts{Address: addr}),
+		store.NewDiskStore("/tmp/lbry_downloaded_blobs", 2),
+	)
+
+	wd, err := os.Getwd()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	var sd stream.SDBlob
+
+	sdb, _, err := s.Get(sdHash)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	err = sd.FromBlob(sdb)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	filename := sd.SuggestedFileName
+	if filename == "" {
+		filename = "stream_" + time.Now().Format("20060102_150405")
+	}
+
+	f, err := os.Create(wd + "/" + filename)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for i := 0; i < len(sd.BlobInfos)-1; i++ {
+		b, _, err := s.Get(hex.EncodeToString(sd.BlobInfos[i].BlobHash))
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		data, err := b.Plaintext(sd.Key, sd.BlobInfos[i].IV)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		_, err = f.Write(data)
+		if err != nil {
+			log.Fatal(err)
+		}
+	}
+}

cmd/integrity.go

@@ -0,0 +1,93 @@
+package cmd
+
+import (
+	"crypto/sha512"
+	"encoding/hex"
+	"os"
+	"path"
+	"runtime"
+	"sync/atomic"
+	"time"
+
+	"github.com/lbryio/reflector.go/meta"
+	"github.com/lbryio/reflector.go/store/speedwalk"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+)
+
+var threads int
+
+func init() {
+	var cmd = &cobra.Command{
+		Use:   "check-integrity",
+		Short: "check blobs integrity for a given path",
+		Run:   integrityCheckCmd,
+	}
+	cmd.Flags().StringVar(&diskStorePath, "store-path", "", "path of the store where all blobs are cached")
+	cmd.Flags().IntVar(&threads, "threads", runtime.NumCPU()-1, "number of concurrent threads to process blobs")
+	rootCmd.AddCommand(cmd)
+}
+
+func integrityCheckCmd(cmd *cobra.Command, args []string) {
+	log.Printf("reflector %s", meta.VersionString())
+	if diskStorePath == "" {
+		log.Fatal("store-path must be defined")
+	}
+
+	blobs, err := speedwalk.AllFiles(diskStorePath, true)
+	if err != nil {
+		log.Fatalf("error while reading blobs from disk %s", errors.FullTrace(err))
+	}
+	tasks := make(chan string, len(blobs))
+	done := make(chan bool)
+	processed := new(int32)
+	go produce(tasks, blobs)
+	cpus := runtime.NumCPU()
+	for i := 0; i < cpus-1; i++ {
+		go consume(i, tasks, done, len(blobs), processed)
+	}
+	<-done
+}
+
+func produce(tasks chan<- string, blobs []string) {
+	for _, b := range blobs {
+		tasks <- b
+	}
+	close(tasks)
+}
+
+func consume(worker int, tasks <-chan string, done chan<- bool, totalTasks int, processed *int32) {
+	start := time.Now()
+
+	for b := range tasks {
+		processedSoFar := atomic.AddInt32(processed, 1)
+		if worker == 0 {
+			remaining := int32(totalTasks) - processedSoFar
+			timePerBlob := time.Since(start).Microseconds() / int64(processedSoFar)
+			remainingTime := time.Duration(int64(remaining)*timePerBlob) * time.Microsecond
+			log.Infof("[T%d] %d/%d blobs processed so far. ETA: %s", worker, processedSoFar, totalTasks, remainingTime.String())
+		}
+		blobPath := path.Join(diskStorePath, b[:2], b)
+		blob, err := os.ReadFile(blobPath)
+		if err != nil {
+			if os.IsNotExist(err) {
+				continue
+			}
+			log.Errorf("[Worker %d] Error looking up blob %s: %s", worker, b, err.Error())
+			continue
+		}
+		hashBytes := sha512.Sum384(blob)
+		readHash := hex.EncodeToString(hashBytes[:])
+		if readHash != b {
+			log.Infof("[%s] found a broken blob while reading from disk. Actual hash: %s", b, readHash)
+			err := os.Remove(blobPath)
+			if err != nil {
+				log.Errorf("Error while deleting broken blob %s: %s", b, err.Error())
+			}
+		}
+	}
+	done <- true
+}

cmd/peer.go

@@ -7,30 +7,41 @@ import (
 	"syscall"
 
 	"github.com/lbryio/reflector.go/db"
-	"github.com/lbryio/reflector.go/peer"
+	"github.com/lbryio/reflector.go/server/peer"
 	"github.com/lbryio/reflector.go/store"
 
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
 
+var peerNoDB bool
+
 func init() {
 	var cmd = &cobra.Command{
 		Use:   "peer",
 		Short: "Run peer server",
 		Run:   peerCmd,
 	}
+	cmd.Flags().BoolVar(&peerNoDB, "nodb", false, "Don't connect to a db and don't use a db-backed blob store")
 	rootCmd.AddCommand(cmd)
 }
 
 func peerCmd(cmd *cobra.Command, args []string) {
-	db := new(db.SQL)
-	err := db.Connect(globalConfig.DBConn)
+	var err error
+
+	s3 := store.NewS3Store(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName, globalConfig.S3Endpoint)
+	peerServer := peer.NewServer(s3)
+
+	if !peerNoDB {
+		db := &db.SQL{
+			LogQueries: log.GetLevel() == log.DebugLevel,
+		}
+		err = db.Connect(globalConfig.DBConn)
 		checkErr(err)
 
-	s3 := store.NewS3BlobStore(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName)
-	combo := store.NewDBBackedS3Store(s3, db)
-	peerServer := peer.NewServer(combo)
+		combo := store.NewDBBackedStore(s3, db, false)
+		peerServer = peer.NewServer(combo)
+	}
 
 	err = peerServer.Start(":" + strconv.Itoa(peer.DefaultPort))
 	if err != nil {

cmd/populatedb.go

@@ -0,0 +1,51 @@
+package cmd
+
+import (
+	"github.com/lbryio/reflector.go/db"
+	"github.com/lbryio/reflector.go/meta"
+	"github.com/lbryio/reflector.go/store/speedwalk"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+)
+
+var (
+	diskStorePath string
+)
+
+func init() {
+	var cmd = &cobra.Command{
+		Use:   "populate-db",
+		Short: "populate local database with blobs from a disk storage",
+		Run:   populateDbCmd,
+	}
+	cmd.Flags().StringVar(&diskStorePath, "store-path", "",
+		"path of the store where all blobs are cached")
+	rootCmd.AddCommand(cmd)
+}
+
+func populateDbCmd(cmd *cobra.Command, args []string) {
+	log.Printf("reflector %s", meta.VersionString())
+	if diskStorePath == "" {
+		log.Fatal("store-path must be defined")
+	}
+	localDb := &db.SQL{
+		SoftDelete:  true,
+		TrackAccess: db.TrackAccessBlobs,
+		LogQueries:  log.GetLevel() == log.DebugLevel,
+	}
+	err := localDb.Connect("reflector:reflector@tcp(localhost:3306)/reflector")
+	if err != nil {
+		log.Fatal(err)
+	}
+	blobs, err := speedwalk.AllFiles(diskStorePath, true)
+	if err != nil {
+		log.Fatal(err)
+	}
+	err = localDb.AddBlobs(blobs)
+	if err != nil {
+		log.Errorf("error while storing to db: %s", errors.FullTrace(err))
+	}
+}

cmd/publish.go

@@ -0,0 +1,65 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/lbryio/reflector.go/publish"
+
+	"github.com/lbryio/lbry.go/v2/lbrycrd"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	var cmd = &cobra.Command{
+		Use:   "publish FILE",
+		Short: "Publish a file",
+		Args:  cobra.ExactArgs(1),
+		Run:   publishCmd,
+	}
+	cmd.Flags().String("name", "", "Claim name")
+	cmd.Flags().String("title", "", "Title of the content")
+	cmd.Flags().String("description", "", "Description of the content")
+	cmd.Flags().String("author", "", "Content author")
+	cmd.Flags().String("tags", "", "Comma-separated list of tags")
+	cmd.Flags().Int64("release-time", 0, "original public release of content, seconds since UNIX epoch")
+	rootCmd.AddCommand(cmd)
+}
+
+func publishCmd(cmd *cobra.Command, args []string) {
+	var err error
+
+	claimName := mustGetFlagString(cmd, "name")
+	if claimName == "" {
+		log.Errorln("--name required")
+		return
+	}
+
+	path := args[0]
+
+	client, err := lbrycrd.NewWithDefaultURL(nil)
+	checkErr(err)
+
+	tx, txid, err := publish.Publish(
+		client,
+		path,
+		claimName,
+		"bSzpgkTnAoiT2YAhUShPpfpajPESfNXVTu",
+		publish.Details{
+			Title:       mustGetFlagString(cmd, "title"),
+			Description: mustGetFlagString(cmd, "description"),
+			Author:      mustGetFlagString(cmd, "author"),
+			Tags:        nil,
+			ReleaseTime: mustGetFlagInt64(cmd, "release-time"),
+		},
+		"reflector.lbry.com:5566",
+	)
+	checkErr(err)
+
+	decoded, err := publish.Decode(client, tx)
+	checkErr(err)
+
+	fmt.Printf("TX: %s\n\n", decoded)
+	fmt.Printf("TXID: %s\n", txid.String())
+}

cmd/reflector.go

@@ -4,81 +4,378 @@ import (
 	"os"
 	"os/signal"
 	"strconv"
+	"strings"
 	"syscall"
 	"time"
 
-	"github.com/lbryio/reflector.go/reflector"
-
+	"github.com/lbryio/lbry.go/v2/extras/util"
 	"github.com/lbryio/reflector.go/db"
+	"github.com/lbryio/reflector.go/internal/metrics"
 	"github.com/lbryio/reflector.go/meta"
-	"github.com/lbryio/reflector.go/peer"
+	"github.com/lbryio/reflector.go/reflector"
+	"github.com/lbryio/reflector.go/server/http"
+	"github.com/lbryio/reflector.go/server/http3"
+	"github.com/lbryio/reflector.go/server/peer"
 	"github.com/lbryio/reflector.go/store"
 
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	"github.com/c2h5oh/datasize"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
 
+var (
+	//port configuration
+	tcpPeerPort   int
+	http3PeerPort int
+	httpPeerPort  int
+	receiverPort  int
+	metricsPort   int
+
+	//flags configuration
+	disableUploads   bool
+	disableBlocklist bool
+	useDB            bool
+
+	//upstream configuration
+	upstreamReflector string
+	upstreamProtocol  string
+	upstreamEdgeToken string
+
+	//downstream configuration
+	requestQueueSize int
+
+	//upstream edge configuration (to "cold" storage)
+	originEndpoint         string
+	originEndpointFallback string
+
+	//cache configuration
+	diskCache          string
+	secondaryDiskCache string
+	memCache           int
+)
+var cacheManagers = []string{"localdb", "lfu", "arc", "lru", "simple"}
+
+var cacheMangerToGcache = map[string]store.EvictionStrategy{
+	"lfu":    store.LFU,
+	"arc":    store.ARC,
+	"lru":    store.LRU,
+	"simple": store.SIMPLE,
+}
+
 func init() {
 	var cmd = &cobra.Command{
 		Use:   "reflector",
 		Short: "Run reflector server",
 		Run:   reflectorCmd,
 	}
+
+	cmd.Flags().IntVar(&tcpPeerPort, "tcp-peer-port", 5567, "The port reflector will distribute content from for the TCP (LBRY) protocol")
+	cmd.Flags().IntVar(&http3PeerPort, "http3-peer-port", 5568, "The port reflector will distribute content from over HTTP3 protocol")
+	cmd.Flags().IntVar(&httpPeerPort, "http-peer-port", 5569, "The port reflector will distribute content from over HTTP protocol")
+	cmd.Flags().IntVar(&receiverPort, "receiver-port", 5566, "The port reflector will receive content from")
+	cmd.Flags().IntVar(&metricsPort, "metrics-port", 2112, "The port reflector will use for prometheus metrics")
+
+	cmd.Flags().BoolVar(&disableUploads, "disable-uploads", false, "Disable uploads to this reflector server")
+	cmd.Flags().BoolVar(&disableBlocklist, "disable-blocklist", false, "Disable blocklist watching/updating")
+	cmd.Flags().BoolVar(&useDB, "use-db", true, "Whether to connect to the reflector db or not")
+
+	cmd.Flags().StringVar(&upstreamReflector, "upstream-reflector", "", "host:port of a reflector server where blobs are fetched from")
+	cmd.Flags().StringVar(&upstreamProtocol, "upstream-protocol", "http", "protocol used to fetch blobs from another upstream reflector server (tcp/http3/http)")
+	cmd.Flags().StringVar(&upstreamEdgeToken, "upstream-edge-token", "", "token used to retrieve/authenticate protected content")
+
+	cmd.Flags().IntVar(&requestQueueSize, "request-queue-size", 200, "How many concurrent requests from downstream should be handled at once (the rest will wait)")
+
+	cmd.Flags().StringVar(&originEndpoint, "origin-endpoint", "", "HTTP edge endpoint for standard HTTP retrieval")
+	cmd.Flags().StringVar(&originEndpointFallback, "origin-endpoint-fallback", "", "HTTP edge endpoint for standard HTTP retrieval if first origin fails")
+
+	cmd.Flags().StringVar(&diskCache, "disk-cache", "100GB:/tmp/downloaded_blobs:localdb", "Where to cache blobs on the file system. format is 'sizeGB:CACHE_PATH:cachemanager' (cachemanagers: localdb/lfu/arc/lru)")
+	cmd.Flags().StringVar(&secondaryDiskCache, "optional-disk-cache", "", "Optional secondary file system cache for blobs. format is 'sizeGB:CACHE_PATH:cachemanager' (cachemanagers: localdb/lfu/arc/lru) (this would get hit before the one specified in disk-cache)")
+	cmd.Flags().IntVar(&memCache, "mem-cache", 0, "enable in-memory cache with a max size of this many blobs")
+
 	rootCmd.AddCommand(cmd)
 }
 
 func reflectorCmd(cmd *cobra.Command, args []string) {
-	log.Printf("reflector version %s, built %s", meta.Version, meta.BuildTime.Format(time.RFC3339))
+	log.Printf("reflector %s", meta.VersionString())
 
-	// flip this flag to false when doing db maintenance. uploads will not work (as reflector server wont be running)
-	// but downloads will still work straight from s3
-	useDB := true
+	// the blocklist logic requires the db backed store to be the outer-most store
+	underlyingStore := initStores()
+	underlyingStoreWithCaches, cleanerStopper := initCaches(underlyingStore)
 
-	s3 := store.NewS3BlobStore(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName)
-
-	var err error
-
-	var blobStore store.BlobStore = s3
-	var reflectorServer *reflector.Server
-
-	if useDB {
-		db := new(db.SQL)
-		err = db.Connect(globalConfig.DBConn)
-		if err != nil {
-			log.Fatal(err)
-		}
-
-		blobStore = store.NewDBBackedS3Store(s3, db)
-
-		reflectorServer = reflector.NewServer(blobStore)
+	if !disableUploads {
+		reflectorServer := reflector.NewServer(underlyingStore, underlyingStoreWithCaches)
 		reflectorServer.Timeout = 3 * time.Minute
-		if globalConfig.SlackHookURL != "" {
-			reflectorServer.StatLogger = log.StandardLogger()
-			reflectorServer.StatReportFrequency = 1 * time.Hour
-		}
-		reflectorServer.EnableBlocklist = true
+		reflectorServer.EnableBlocklist = !disableBlocklist
 
-		err = reflectorServer.Start(":" + strconv.Itoa(reflector.DefaultPort))
+		err := reflectorServer.Start(":" + strconv.Itoa(receiverPort))
 		if err != nil {
 			log.Fatal(err)
 		}
+		defer reflectorServer.Shutdown()
 	}
 
-	peerServer := peer.NewServer(blobStore)
-	if globalConfig.SlackHookURL != "" {
-		peerServer.StatLogger = log.StandardLogger()
-		peerServer.StatReportFrequency = 1 * time.Hour
-	}
-	err = peerServer.Start(":5567")
+	peerServer := peer.NewServer(underlyingStoreWithCaches)
+	err := peerServer.Start(":" + strconv.Itoa(tcpPeerPort))
 	if err != nil {
 		log.Fatal(err)
 	}
+	defer peerServer.Shutdown()
+
+	http3PeerServer := http3.NewServer(underlyingStoreWithCaches, requestQueueSize)
+	err = http3PeerServer.Start(":" + strconv.Itoa(http3PeerPort))
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer http3PeerServer.Shutdown()
+
+	httpServer := http.NewServer(store.WithSingleFlight("sf-http", underlyingStoreWithCaches), requestQueueSize, upstreamEdgeToken)
+	err = httpServer.Start(":" + strconv.Itoa(httpPeerPort))
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer httpServer.Shutdown()
+
+	metricsServer := metrics.NewServer(":"+strconv.Itoa(metricsPort), "/metrics")
+	metricsServer.Start()
+	defer metricsServer.Shutdown()
+	defer underlyingStoreWithCaches.Shutdown()
+	defer underlyingStore.Shutdown() //do we actually need this? Oo
 
 	interruptChan := make(chan os.Signal, 1)
 	signal.Notify(interruptChan, os.Interrupt, syscall.SIGTERM)
 	<-interruptChan
-	peerServer.Shutdown()
-	if reflectorServer != nil {
-		reflectorServer.Shutdown()
+	// deferred shutdowns happen now
+	cleanerStopper.StopAndWait()
+}
+
+func initUpstreamStore() store.BlobStore {
+	var s store.BlobStore
+	if upstreamReflector == "" {
+		return nil
+	}
+	switch upstreamProtocol {
+	case "tcp":
+		s = peer.NewStore(peer.StoreOpts{
+			Address: upstreamReflector,
+			Timeout: 30 * time.Second,
+		})
+	case "http3":
+		s = http3.NewStore(http3.StoreOpts{
+			Address: upstreamReflector,
+			Timeout: 30 * time.Second,
+		})
+	case "http":
+		s = store.NewHttpStore(upstreamReflector, upstreamEdgeToken)
+	default:
+		log.Fatalf("protocol is not recognized: %s", upstreamProtocol)
+	}
+	return s
+}
+func initEdgeStore() store.BlobStore {
+	var s3Store *store.S3Store
+	var s store.BlobStore
+
+	if conf != "none" {
+		s3Store = store.NewS3Store(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName, globalConfig.S3Endpoint)
+	}
+	if originEndpointFallback != "" && originEndpoint != "" {
+		ittt := store.NewITTTStore(store.NewCloudFrontROStore(originEndpoint), store.NewCloudFrontROStore(originEndpointFallback))
+		if s3Store != nil {
+			s = store.NewCloudFrontRWStore(ittt, s3Store)
+		} else {
+			s = ittt
+		}
+	} else if s3Store != nil {
+		s = s3Store
+	} else {
+		log.Fatalf("this configuration does not include a valid upstream source")
+	}
+	return s
+}
+
+func initDBStore(s store.BlobStore) store.BlobStore {
+	if useDB {
+		dbInst := &db.SQL{
+			TrackAccess: db.TrackAccessStreams,
+			LogQueries:  log.GetLevel() == log.DebugLevel,
+		}
+		err := dbInst.Connect(globalConfig.DBConn)
+		if err != nil {
+			log.Fatal(err)
+		}
+		s = store.NewDBBackedStore(s, dbInst, false)
+	}
+	return s
+}
+
+func initStores() store.BlobStore {
+	s := initUpstreamStore()
+	if s == nil {
+		s = initEdgeStore()
+	}
+	s = initDBStore(s)
+	return s
+}
+
+// initCaches returns a store wrapped with caches and a stop group to execute a clean shutdown
+func initCaches(s store.BlobStore) (store.BlobStore, *stop.Group) {
+	stopper := stop.New()
+	diskStore := initDiskStore(s, diskCache, stopper)
+	finalStore := initDiskStore(diskStore, secondaryDiskCache, stopper)
+	stop.New()
+	if memCache > 0 {
+		finalStore = store.NewCachingStore(
+			"reflector",
+			finalStore,
+			store.NewGcacheStore("mem", store.NewMemStore(), memCache, store.LRU),
+		)
+	}
+	return finalStore, stopper
+}
+
+func initDiskStore(upstreamStore store.BlobStore, diskParams string, stopper *stop.Group) store.BlobStore {
+	diskCacheMaxSize, diskCachePath, cacheManager := diskCacheParams(diskParams)
+	//we are tracking blobs in memory with a 1 byte long boolean, which means that for each 2MB (a blob) we need 1Byte
+	// so if the underlying cache holds 10MB, 10MB/2MB=5Bytes which is also the exact count of objects to restore on startup
+	realCacheSize := float64(diskCacheMaxSize) / float64(stream.MaxBlobSize)
+	if diskCacheMaxSize == 0 {
+		return upstreamStore
+	}
+	err := os.MkdirAll(diskCachePath, os.ModePerm)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	diskStore := store.NewDiskStore(diskCachePath, 2)
+	var unwrappedStore store.BlobStore
+	cleanerStopper := stop.New(stopper)
+
+	if cacheManager == "localdb" {
+		localDb := &db.SQL{
+			SoftDelete:  true,
+			TrackAccess: db.TrackAccessBlobs,
+			LogQueries:  log.GetLevel() == log.DebugLevel,
+		}
+		err = localDb.Connect("reflector:reflector@tcp(localhost:3306)/reflector")
+		if err != nil {
+			log.Fatal(err)
+		}
+		unwrappedStore = store.NewDBBackedStore(diskStore, localDb, true)
+		go cleanOldestBlobs(int(realCacheSize), localDb, unwrappedStore, cleanerStopper)
+	} else {
+		unwrappedStore = store.NewGcacheStore("nvme", store.NewDiskStore(diskCachePath, 2), int(realCacheSize), cacheMangerToGcache[cacheManager])
+	}
+
+	wrapped := store.NewCachingStore(
+		"reflector",
+		upstreamStore,
+		unwrappedStore,
+	)
+	return wrapped
+}
+
+func diskCacheParams(diskParams string) (int, string, string) {
+	if diskParams == "" {
+		return 0, "", ""
+	}
+
+	parts := strings.Split(diskParams, ":")
+	if len(parts) != 3 {
+		log.Fatalf("%s does is formatted incorrectly. Expected format: 'sizeGB:CACHE_PATH:cachemanager' for example: '100GB:/tmp/downloaded_blobs:localdb'", diskParams)
+	}
+
+	diskCacheSize := parts[0]
+	path := parts[1]
+	cacheManager := parts[2]
+
+	if len(path) == 0 || path[0] != '/' {
+		log.Fatalf("disk cache paths must start with '/'")
+	}
+
+	if !util.InSlice(cacheManager, cacheManagers) {
+		log.Fatalf("specified cache manager '%s' is not supported. Use one of the following: %v", cacheManager, cacheManagers)
+	}
+
+	var maxSize datasize.ByteSize
+	err := maxSize.UnmarshalText([]byte(diskCacheSize))
+	if err != nil {
+		log.Fatal(err)
+	}
+	if maxSize <= 0 {
+		log.Fatal("disk cache size must be more than 0")
+	}
+	return int(maxSize), path, cacheManager
+}
+
+func cleanOldestBlobs(maxItems int, db *db.SQL, store store.BlobStore, stopper *stop.Group) {
+	// this is so that it runs on startup without having to wait for 10 minutes
+	err := doClean(maxItems, db, store, stopper)
+	if err != nil {
+		log.Error(errors.FullTrace(err))
+	}
+	const cleanupInterval = 10 * time.Minute
+	for {
+		select {
+		case <-stopper.Ch():
+			log.Infoln("stopping self cleanup")
+			return
+		case <-time.After(cleanupInterval):
+			err := doClean(maxItems, db, store, stopper)
+			if err != nil {
+				log.Error(errors.FullTrace(err))
 			}
 		}
+	}
+}
+
+func doClean(maxItems int, db *db.SQL, store store.BlobStore, stopper *stop.Group) error {
+	blobsCount, err := db.Count()
+	if err != nil {
+		return err
+	}
+
+	if blobsCount >= maxItems {
+		itemsToDelete := blobsCount / 10
+		blobs, err := db.LeastRecentlyAccessedHashes(itemsToDelete)
+		if err != nil {
+			return err
+		}
+		blobsChan := make(chan string, len(blobs))
+		wg := &stop.Group{}
+		go func() {
+			for _, hash := range blobs {
+				select {
+				case <-stopper.Ch():
+					return
+				default:
+				}
+				blobsChan <- hash
+			}
+			close(blobsChan)
+		}()
+		for i := 0; i < 3; i++ {
+			wg.Add(1)
+			go func() {
+				defer wg.Done()
+				for h := range blobsChan {
+					select {
+					case <-stopper.Ch():
+						return
+					default:
+					}
+					err = store.Delete(h)
+					if err != nil {
+						log.Errorf("error pruning %s: %s", h, errors.FullTrace(err))
+						continue
+					}
+				}
+			}()
+		}
+		wg.Wait()
+	}
+	return nil
+}

cmd/resolve.go

@@ -0,0 +1,50 @@
+package cmd
+
+import (
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+
+	"github.com/lbryio/reflector.go/wallet"
+
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	var cmd = &cobra.Command{
+		Use:   "resolve ADDRESS:PORT URL",
+		Short: "Resolve a URL",
+		Args:  cobra.ExactArgs(2),
+		Run:   resolveCmd,
+	}
+	rootCmd.AddCommand(cmd)
+}
+
+func resolveCmd(cmd *cobra.Command, args []string) {
+	addr := args[0]
+	url := args[1]
+
+	node := wallet.NewNode()
+	defer node.Shutdown()
+	err := node.Connect([]string{addr}, nil)
+	checkErr(err)
+
+	output, err := node.Resolve(url)
+	checkErr(err)
+
+	claim, err := node.GetClaimInTx(hex.EncodeToString(rev(output.GetTxHash())), int(output.GetNout()))
+	checkErr(err)
+
+	jsonClaim, err := json.MarshalIndent(claim, "", "  ")
+	checkErr(err)
+
+	fmt.Println(string(jsonClaim))
+}
+
+func rev(b []byte) []byte {
+	r := make([]byte, len(b))
+	for left, right := 0, len(b)-1; left < right; left, right = left+1, right-1 {
+		r[left], r[right] = b[right], b[left]
+	}
+	return r
+}

cmd/root.go

@@ -2,14 +2,15 @@ package cmd
 
 import (
 	"encoding/json"
-	"io/ioutil"
 	"os"
+	"strings"
 
-	"github.com/lbryio/lbry.go/dht"
-	"github.com/lbryio/lbry.go/extras/errors"
-	"github.com/lbryio/lbry.go/extras/util"
 	"github.com/lbryio/reflector.go/updater"
 
+	"github.com/lbryio/lbry.go/v2/dht"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/util"
+
 	"github.com/johntdyer/slackrus"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
@@ -21,8 +22,10 @@ type Config struct {
 	AwsSecret    string `json:"aws_secret"`
 	BucketRegion string `json:"bucket_region"`
 	BucketName   string `json:"bucket_name"`
+	S3Endpoint   string `json:"s3_endpoint"`
 	DBConn       string `json:"db_conn"`
 	SlackHookURL string `json:"slack_hook_url"`
+	SlackChannel string `json:"slack_channel"`
 	UpdateBinURL string `json:"update_bin_url"`
 	UpdateCmd    string `json:"update_cmd"`
 }
@@ -49,7 +52,7 @@ var rootCmd = &cobra.Command{
 
 func init() {
 	rootCmd.PersistentFlags().StringSliceVarP(&verbose, "verbose", "v", []string{}, "Verbose logging for specific components")
-	rootCmd.PersistentFlags().StringVar(&conf, "conf", "config.json", "Path to config")
+	rootCmd.PersistentFlags().StringVar(&conf, "conf", "config.json", "Path to config. Use 'none' to disable")
 }
 
 // Execute adds all child commands to the root command and sets flags appropriately.
@@ -68,8 +71,11 @@ func preRun(cmd *cobra.Command, args []string) {
 	debugLogger.SetOutput(os.Stderr)
 
 	if util.InSlice(verboseAll, verbose) {
+		logrus.Info("global verbose logging enabled")
 		logrus.SetLevel(logrus.DebugLevel)
 		verbose = []string{verboseDHT, verboseNodeFinder}
+	} else if len(verbose) > 0 {
+		logrus.Infof("verbose logging enabled for: %s", strings.Join(verbose, ", "))
 	}
 
 	for _, debugType := range verbose {
@@ -97,7 +103,7 @@ func preRun(cmd *cobra.Command, args []string) {
 		hook := &slackrus.SlackrusHook{
 			HookURL:        globalConfig.SlackHookURL,
 			AcceptedLevels: slackrus.LevelThreshold(logrus.InfoLevel),
-			Channel:        "#reflector-logs",
+			Channel:        globalConfig.SlackChannel,
 			//IconEmoji:      ":ghost:",
 			//Username:       "reflector.go",
 		}
@@ -136,14 +142,32 @@ func argFuncs(funcs ...cobra.PositionalArgs) cobra.PositionalArgs {
 func loadConfig(path string) (Config, error) {
 	var c Config
 
-	raw, err := ioutil.ReadFile(path)
+	raw, err := os.ReadFile(path)
 	if err != nil {
 		if os.IsNotExist(err) {
 			return c, errors.Err("config file not found")
 		}
-		return c, err
+		return c, errors.Err(err)
 	}
 
 	err = json.Unmarshal(raw, &c)
-	return c, err
+	return c, errors.Err(err)
 }
+
+func mustGetFlagString(cmd *cobra.Command, name string) string {
+	v, err := cmd.Flags().GetString(name)
+	checkErr(err)
+	return v
+}
+
+func mustGetFlagInt64(cmd *cobra.Command, name string) int64 {
+	v, err := cmd.Flags().GetInt64(name)
+	checkErr(err)
+	return v
+}
+
+//func mustGetFlagBool(cmd *cobra.Command, name string) bool {
+//	v, err := cmd.Flags().GetBool(name)
+//	checkErr(err)
+//	return v
+//}

cmd/send.go

@@ -0,0 +1,158 @@
+package cmd
+
+import (
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"io"
+	"os"
+	"os/signal"
+	"path"
+	"syscall"
+
+	"github.com/lbryio/reflector.go/reflector"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	var cmd = &cobra.Command{
+		Use:   "send ADDRESS:PORT PATH",
+		Short: "Send a file to a reflector",
+		Args:  cobra.ExactArgs(2),
+		Run:   sendCmd,
+	}
+	cmd.PersistentFlags().String("sd-cache", "", "path to dir where sd blobs will be cached")
+	rootCmd.AddCommand(cmd)
+}
+
+// todo: if retrying a large file is slow, we can add the ability to seek ahead in the file so we're not
+// re-uploading blobs that already exist
+
+var hackyReflector reflector.Client
+
+func sendCmd(cmd *cobra.Command, args []string) {
+	reflectorAddress := args[0]
+	err := hackyReflector.Connect(reflectorAddress)
+	checkErr(err)
+	defer func() { _ = hackyReflector.Close() }()
+
+	filePath := args[1]
+	file, err := os.Open(filePath)
+	checkErr(err)
+	defer func() { _ = file.Close() }()
+	sdCachePath := ""
+	sdCacheDir := mustGetFlagString(cmd, "sd-cache")
+	if sdCacheDir != "" {
+		if _, err := os.Stat(sdCacheDir); os.IsNotExist(err) {
+			err = os.MkdirAll(sdCacheDir, 0777)
+			checkErr(err)
+		}
+		sdCachePath = path.Join(sdCacheDir, filePath+".sdblob")
+	}
+
+	var enc *stream.Encoder
+
+	if sdCachePath != "" {
+		if _, err := os.Stat(sdCachePath); !os.IsNotExist(err) {
+			sdBlob, err := os.ReadFile(sdCachePath)
+			checkErr(err)
+			cachedSDBlob := &stream.SDBlob{}
+			err = cachedSDBlob.FromBlob(sdBlob)
+			checkErr(err)
+			enc = stream.NewEncoderFromSD(file, cachedSDBlob)
+		}
+	}
+	if enc == nil {
+		enc = stream.NewEncoder(file)
+	}
+
+	exitCode := 0
+
+	var killed bool
+	interruptChan := make(chan os.Signal, 1)
+	signal.Notify(interruptChan, os.Interrupt, syscall.SIGTERM)
+	go func() {
+		sig := <-interruptChan
+		fmt.Printf("caught %s, exiting...\n", sig.String())
+		killed = true
+		exitCode = 1
+	}()
+
+	for {
+		if killed {
+			break
+		}
+
+		b, err := enc.Next()
+		if errors.Is(err, io.EOF) {
+			break
+		}
+		if err != nil {
+			fmt.Printf("error reading next blob: %v\n", err)
+			exitCode = 1
+			break
+		}
+
+		err = hackyReflect(b, false)
+		if err != nil {
+			fmt.Printf("error reflecting blob %s: %v\n", b.HashHex()[:8], err)
+			exitCode = 1
+			break
+		}
+	}
+
+	sd := enc.SDBlob()
+	//sd.StreamName = filepath.Base(filePath)
+	//sd.SuggestedFileName = filepath.Base(filePath)
+	err = os.WriteFile(sdCachePath, sd.ToBlob(), 0666)
+	if err != nil {
+		fmt.Printf("error saving sd blob: %v\n", err)
+		fmt.Println(sd.ToJson())
+		exitCode = 1
+	}
+
+	if killed {
+		os.Exit(exitCode)
+	}
+
+	if reflectorAddress != "" {
+		err = hackyReflect(sd.ToBlob(), true)
+		if err != nil {
+			fmt.Printf("error reflecting sd blob %s: %v\n", sd.HashHex()[:8], err)
+			exitCode = 1
+		}
+	}
+
+	ret := struct {
+		SDHash     string `json:"sd_hash"`
+		SourceHash string `json:"source_hash"`
+	}{
+		SDHash:     sd.HashHex(),
+		SourceHash: hex.EncodeToString(enc.SourceHash()),
+	}
+
+	j, err := json.MarshalIndent(ret, "", "  ")
+	checkErr(err)
+	fmt.Println(string(j))
+	os.Exit(exitCode)
+}
+
+func hackyReflect(b stream.Blob, sd bool) error {
+	var err error
+	if sd {
+		err = hackyReflector.SendSDBlob(b)
+	} else {
+		err = hackyReflector.SendBlob(b)
+	}
+
+	if errors.Is(err, reflector.ErrBlobExists) {
+		//fmt.Printf("%s already reflected\n", b.HashHex()[:8])
+		return nil
+	}
+
+	return err
+}

cmd/sendblob.go

@@ -2,10 +2,11 @@ package cmd
 
 import (
 	"crypto/rand"
+	"os"
 
 	"github.com/lbryio/reflector.go/reflector"
 
-	"github.com/lbryio/lbry.go/stream"
+	"github.com/lbryio/lbry.go/v2/stream"
 
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
@@ -13,9 +14,9 @@ import (
 
 func init() {
 	var cmd = &cobra.Command{
-		Use:   "sendblob ADDRESS:PORT",
+		Use:   "sendblob ADDRESS:PORT [PATH]",
 		Short: "Send a random blob to a reflector server",
-		Args:  cobra.ExactArgs(1),
+		Args:  cobra.RangeArgs(1, 2),
 		Run:   sendBlobCmd,
 	}
 	rootCmd.AddCommand(cmd)
@@ -23,6 +24,10 @@ func init() {
 
 func sendBlobCmd(cmd *cobra.Command, args []string) {
 	addr := args[0]
+	var path string
+	if len(args) >= 2 {
+		path = args[1]
+	}
 
 	c := reflector.Client{}
 	err := c.Connect(addr)
@@ -30,6 +35,7 @@ func sendBlobCmd(cmd *cobra.Command, args []string) {
 		log.Fatal("error connecting client to server: ", err)
 	}
 
+	if path == "" {
 		blob := make(stream.Blob, 1024)
 		_, err = rand.Read(blob)
 		if err != nil {
@@ -40,4 +46,25 @@ func sendBlobCmd(cmd *cobra.Command, args []string) {
 		if err != nil {
 			log.Error(err)
 		}
+		return
+	}
+
+	file, err := os.Open(path)
+	checkErr(err)
+	defer func() { _ = file.Close() }()
+	s, err := stream.New(file)
+	checkErr(err)
+
+	sdBlob := &stream.SDBlob{}
+	err = sdBlob.FromBlob(s[0])
+	checkErr(err)
+
+	for i, b := range s {
+		if i == 0 {
+			err = c.SendSDBlob(b)
+		} else {
+			err = c.SendBlob(b)
+		}
+		checkErr(err)
+	}
 }

cmd/start.go

@@ -7,15 +7,16 @@ import (
 	"strings"
 	"syscall"
 
-	"github.com/lbryio/lbry.go/dht"
-	"github.com/lbryio/lbry.go/dht/bits"
 	"github.com/lbryio/reflector.go/cluster"
 	"github.com/lbryio/reflector.go/db"
-	"github.com/lbryio/reflector.go/peer"
 	"github.com/lbryio/reflector.go/prism"
 	"github.com/lbryio/reflector.go/reflector"
+	"github.com/lbryio/reflector.go/server/peer"
 	"github.com/lbryio/reflector.go/store"
 
+	"github.com/lbryio/lbry.go/v2/dht"
+	"github.com/lbryio/lbry.go/v2/dht/bits"
+
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
@@ -52,11 +53,13 @@ func init() {
 }
 
 func startCmd(cmd *cobra.Command, args []string) {
-	db := new(db.SQL)
+	db := &db.SQL{
+		LogQueries: log.GetLevel() == log.DebugLevel,
+	}
 	err := db.Connect(globalConfig.DBConn)
 	checkErr(err)
-	s3 := store.NewS3BlobStore(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName)
-	comboStore := store.NewDBBackedS3Store(s3, db)
+	s3 := store.NewS3Store(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName, globalConfig.S3Endpoint)
+	comboStore := store.NewDBBackedStore(s3, db, false)
 
 	conf := prism.DefaultConf()
 

cmd/test.go

@@ -9,8 +9,8 @@ import (
 	"time"
 
 	"github.com/lbryio/reflector.go/meta"
-	"github.com/lbryio/reflector.go/peer"
 	"github.com/lbryio/reflector.go/reflector"
+	"github.com/lbryio/reflector.go/server/peer"
 	"github.com/lbryio/reflector.go/store"
 
 	log "github.com/sirupsen/logrus"
@@ -27,11 +27,11 @@ func init() {
 }
 
 func testCmd(cmd *cobra.Command, args []string) {
-	log.Printf("reflector version %s", meta.Version)
+	log.Printf("reflector %s", meta.VersionString())
 
-	memStore := &store.MemoryBlobStore{}
+	memStore := store.NewMemStore()
 
-	reflectorServer := reflector.NewServer(memStore)
+	reflectorServer := reflector.NewServer(memStore, memStore)
 	reflectorServer.Timeout = 3 * time.Minute
 
 	err := reflectorServer.Start(":" + strconv.Itoa(reflector.DefaultPort))

cmd/upload.go

@@ -9,11 +9,13 @@ import (
 	"github.com/lbryio/reflector.go/reflector"
 	"github.com/lbryio/reflector.go/store"
 
+	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
 
 var uploadWorkers int
 var uploadSkipExistsCheck bool
+var uploadDeleteBlobsAfterUpload bool
 
 func init() {
 	var cmd = &cobra.Command{
@@ -24,19 +26,22 @@ func init() {
 	}
 	cmd.PersistentFlags().IntVar(&uploadWorkers, "workers", 1, "How many worker threads to run at once")
 	cmd.PersistentFlags().BoolVar(&uploadSkipExistsCheck, "skipExistsCheck", false, "Dont check if blobs exist before uploading")
+	cmd.PersistentFlags().BoolVar(&uploadDeleteBlobsAfterUpload, "deleteBlobsAfterUpload", false, "Delete blobs after uploading them")
 	rootCmd.AddCommand(cmd)
 }
 
 func uploadCmd(cmd *cobra.Command, args []string) {
-	db := new(db.SQL)
+	db := &db.SQL{
+		LogQueries: log.GetLevel() == log.DebugLevel,
+	}
 	err := db.Connect(globalConfig.DBConn)
 	checkErr(err)
 
-	st := store.NewDBBackedS3Store(
-		store.NewS3BlobStore(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName),
-		db)
+	st := store.NewDBBackedStore(
+		store.NewS3Store(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName, globalConfig.S3Endpoint),
+		db, false)
 
-	uploader := reflector.NewUploader(db, st, uploadWorkers, uploadSkipExistsCheck)
+	uploader := reflector.NewUploader(db, st, uploadWorkers, uploadSkipExistsCheck, uploadDeleteBlobsAfterUpload)
 
 	interruptChan := make(chan os.Signal, 1)
 	signal.Notify(interruptChan, os.Interrupt, syscall.SIGTERM)

cmd/version.go

@@ -2,9 +2,9 @@ package cmd
 
 import (
 	"fmt"
-	"time"
 
 	"github.com/lbryio/reflector.go/meta"
+
 	"github.com/spf13/cobra"
 )
 
@@ -18,5 +18,5 @@ func init() {
 }
 
 func versionCmd(cmd *cobra.Command, args []string) {
-	fmt.Printf("version %s (built %s)\n", meta.Version, meta.BuildTime.Format(time.RFC3339))
+	fmt.Println(meta.FullName())
 }

db/db.go

@@ -3,15 +3,21 @@ package db
 import (
 	"context"
 	"database/sql"
+	"fmt"
+	"runtime"
+	"strings"
 	"time"
 
-	"github.com/lbryio/lbry.go/dht/bits"
-	"github.com/lbryio/lbry.go/extras/errors"
-	qt "github.com/lbryio/lbry.go/extras/query"
+	"github.com/lbryio/lbry.go/v2/dht/bits"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	qt "github.com/lbryio/lbry.go/v2/extras/query"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+	"github.com/lbryio/lbry.go/v2/stream"
 
 	"github.com/go-sql-driver/mysql"
-	_ "github.com/go-sql-driver/mysql" // blank import for db driver ensures its imported even if its not used
 	log "github.com/sirupsen/logrus"
+	"github.com/volatiletech/null/v8"
+	"go.uber.org/atomic"
 )
 
 // SdBlob is a special blob that contains information on the rest of the blobs in the stream
@@ -29,17 +35,38 @@ type SdBlob struct {
 	StreamHash        string `json:"stream_hash"`
 }
 
+type trackAccess int
+
+const (
+	TrackAccessNone    trackAccess = iota // Don't track accesses
+	TrackAccessStreams                    // Track accesses at the stream level
+	TrackAccessBlobs                      // Track accesses at the blob level
+)
+
 // SQL implements the DB interface
 type SQL struct {
 	conn *sql.DB
+
+	// Track the approx last time a blob or stream was accessed
+	TrackAccess trackAccess
+
+	// Instead of deleting a blob, marked it as not stored in the db
+	SoftDelete bool
+
+	// Log executed queries. qt.InterpolateParams is cpu-heavy. This avoids that call if not needed.
+	LogQueries bool
 }
 
-func logQuery(query string, args ...interface{}) {
-	s, err := qt.InterpolateParams(query, args...)
+func (s SQL) logQuery(query string, args ...interface{}) {
+	if !s.LogQueries {
+		return
+	}
+
+	qStr, err := qt.InterpolateParams(query, args...)
 	if err != nil {
 		log.Errorln(err)
 	} else {
-		log.Debugln(s)
+		log.Debugln(qStr)
 	}
 }
 
@@ -70,15 +97,97 @@ func (s *SQL) AddBlob(hash string, length int, isStored bool) error {
 	return err
 }
 
+// AddBlobs adds blobs to the database.
+func (s *SQL) AddBlobs(hash []string) error {
+	if s.conn == nil {
+		return errors.Err("not connected")
+	}
+
+	batch := 10000
+	totalBlobs := int64(len(hash))
+	work := make(chan []string, 1000)
+	stopper := stop.New()
+	var totalInserted atomic.Int64
+	start := time.Now()
+
+	go func() {
+		for i := 0; i < len(hash); i += batch {
+			j := i + batch
+			if j > len(hash) {
+				j = len(hash)
+			}
+			work <- hash[i:j]
+		}
+		log.Infof("done loading %d hashes in the work queue", len(hash))
+		close(work)
+	}()
+
+	for i := 0; i < runtime.NumCPU(); i++ {
+		stopper.Add(1)
+		go func(worker int) {
+			log.Infof("starting worker %d", worker)
+			defer stopper.Done()
+			for hashes := range work {
+				inserted := totalInserted.Load()
+				remaining := totalBlobs - inserted
+				if inserted > 0 {
+					timePerBlob := time.Since(start).Microseconds() / inserted
+					remainingTime := time.Duration(remaining*timePerBlob) * time.Microsecond
+					log.Infof("[T%d] processing batch of %d items. ETA: %s", worker, len(hashes), remainingTime.String())
+				}
+				err := s.insertBlobs(hashes) // Process the batch.
+				if err != nil {
+					log.Errorf("error while inserting batch: %s", errors.FullTrace(err))
+				}
+				totalInserted.Add(int64(len(hashes)))
+			}
+		}(i)
+	}
+
+	stopper.Wait()
+	return nil
+}
+
+func (s *SQL) insertBlobs(hashes []string) error {
+	var (
+		q string
+		//args []interface{}
+	)
+	dayAgo := time.Now().AddDate(0, 0, -1).Format("2006-01-02 15:04:05")
+	q = "insert into blob_ (hash, is_stored, length, last_accessed_at) values "
+	for _, hash := range hashes {
+		// prepared statements slow everything down by a lot due to reflection
+		// for this specific instance we'll go ahead and hardcode the query to make it go faster
+		q += fmt.Sprintf("('%s',1,%d,'%s'),", hash, stream.MaxBlobSize, dayAgo)
+		//args = append(args, hash, true, stream.MaxBlobSize, dayAgo)
+	}
+	q = strings.TrimSuffix(q, ",")
+	_, err := s.exec(q)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func (s *SQL) insertBlob(hash string, length int, isStored bool) (int64, error) {
 	if length <= 0 {
 		return 0, errors.Err("length must be positive")
 	}
 
-	blobID, err := s.exec(
-		"INSERT INTO blob_ (hash, is_stored, length) VALUES (?,?,?) ON DUPLICATE KEY UPDATE is_stored = (is_stored or VALUES(is_stored))",
-		hash, isStored, length,
+	var (
+		q    string
+		args []interface{}
 	)
+	if s.TrackAccess == TrackAccessBlobs {
+		args = []interface{}{hash, isStored, length, time.Now()}
+		q = "INSERT INTO blob_ (hash, is_stored, length, last_accessed_at) VALUES (" + qt.Qs(len(args)) + ") ON DUPLICATE KEY UPDATE is_stored = (is_stored or VALUES(is_stored)), last_accessed_at = VALUES(last_accessed_at)"
+	} else {
+		args = []interface{}{hash, isStored, length}
+		q = "INSERT INTO blob_ (hash, is_stored, length) VALUES (" + qt.Qs(len(args)) + ") ON DUPLICATE KEY UPDATE is_stored = (is_stored or VALUES(is_stored))"
+	}
+
+	blobID, err := s.exec(q, args...)
 	if err != nil {
 		return 0, err
 	}
@@ -91,16 +200,33 @@ func (s *SQL) insertBlob(hash string, length int, isStored bool) (int64, error)
 		if blobID == 0 {
 			return 0, errors.Err("blob ID is 0 even after INSERTing and SELECTing")
 		}
+
+		if s.TrackAccess == TrackAccessBlobs {
+			err := s.touchBlobs([]uint64{uint64(blobID)})
+			if err != nil {
+				return 0, errors.Err(err)
+			}
+		}
 	}
 
 	return blobID, nil
 }
 
 func (s *SQL) insertStream(hash string, sdBlobID int64) (int64, error) {
-	streamID, err := s.exec(
-		"INSERT IGNORE INTO stream (hash, sd_blob_id) VALUES (?,?)",
-		hash, sdBlobID,
+	var (
+		q    string
+		args []interface{}
 	)
+
+	if s.TrackAccess == TrackAccessStreams {
+		args = []interface{}{hash, sdBlobID, time.Now()}
+		q = "INSERT IGNORE INTO stream (hash, sd_blob_id, last_accessed_at) VALUES (" + qt.Qs(len(args)) + ")"
+	} else {
+		args = []interface{}{hash, sdBlobID}
+		q = "INSERT IGNORE INTO stream (hash, sd_blob_id) VALUES (" + qt.Qs(len(args)) + ")"
+	}
+
+	streamID, err := s.exec(q, args...)
 	if err != nil {
 		return 0, errors.Err(err)
 	}
@@ -113,13 +239,20 @@ func (s *SQL) insertStream(hash string, sdBlobID int64) (int64, error) {
 		if streamID == 0 {
 			return 0, errors.Err("stream ID is 0 even after INSERTing and SELECTing")
 		}
+
+		if s.TrackAccess == TrackAccessStreams {
+			err := s.touchStreams([]uint64{uint64(streamID)})
+			if err != nil {
+				return 0, errors.Err(err)
+			}
+		}
 	}
 	return streamID, nil
 }
 
 // HasBlob checks if the database contains the blob information.
-func (s *SQL) HasBlob(hash string) (bool, error) {
-	exists, err := s.HasBlobs([]string{hash})
+func (s *SQL) HasBlob(hash string, touch bool) (bool, error) {
+	exists, err := s.HasBlobs([]string{hash}, touch)
 	if err != nil {
 		return false, err
 	}
@@ -127,13 +260,72 @@ func (s *SQL) HasBlob(hash string) (bool, error) {
 }
 
 // HasBlobs checks if the database contains the set of blobs and returns a bool map.
-func (s *SQL) HasBlobs(hashes []string) (map[string]bool, error) {
-	if s.conn == nil {
-		return nil, errors.Err("not connected")
+func (s *SQL) HasBlobs(hashes []string, touch bool) (map[string]bool, error) {
+	exists, idsNeedingTouch, err := s.hasBlobs(hashes)
+
+	if touch {
+		if s.TrackAccess == TrackAccessBlobs {
+			_ = s.touchBlobs(idsNeedingTouch)
+		} else if s.TrackAccess == TrackAccessStreams {
+			_ = s.touchStreams(idsNeedingTouch)
+		}
 	}
 
-	var hash string
+	return exists, err
+}
+
+func (s *SQL) touchBlobs(blobIDs []uint64) error {
+	if len(blobIDs) == 0 {
+		return nil
+	}
+
+	query := "UPDATE blob_ SET last_accessed_at = ? WHERE id IN (" + qt.Qs(len(blobIDs)) + ")"
+	args := make([]interface{}, len(blobIDs)+1)
+	args[0] = time.Now()
+	for i := range blobIDs {
+		args[i+1] = blobIDs[i]
+	}
+
+	startTime := time.Now()
+	_, err := s.exec(query, args...)
+	log.Debugf("touched %d blobs and took %s", len(blobIDs), time.Since(startTime))
+	return errors.Err(err)
+}
+
+func (s *SQL) touchStreams(streamIDs []uint64) error {
+	if len(streamIDs) == 0 {
+		return nil
+	}
+
+	query := "UPDATE stream SET last_accessed_at = ? WHERE id IN (" + qt.Qs(len(streamIDs)) + ")"
+	args := make([]interface{}, len(streamIDs)+1)
+	args[0] = time.Now()
+	for i := range streamIDs {
+		args[i+1] = streamIDs[i]
+	}
+
+	startTime := time.Now()
+	_, err := s.exec(query, args...)
+	log.Debugf("touched %d streams and took %s", len(streamIDs), time.Since(startTime))
+	return errors.Err(err)
+}
+
+func (s *SQL) hasBlobs(hashes []string) (map[string]bool, []uint64, error) {
+	if s.conn == nil {
+		return nil, nil, errors.Err("not connected")
+	}
+
+	var (
+		hash           string
+		blobID         uint64
+		streamID       null.Uint64
+		lastAccessedAt null.Time
+	)
+
+	var needsTouch []uint64
 	exists := make(map[string]bool)
+
+	touchDeadline := time.Now().Add(-6 * time.Hour) // touch blob if last accessed before this time
 	maxBatchSize := 10000
 	doneIndex := 0
 
@@ -145,14 +337,29 @@ func (s *SQL) HasBlobs(hashes []string) (map[string]bool, error) {
 		log.Debugf("getting hashes[%d:%d] of %d", doneIndex, sliceEnd, len(hashes))
 		batch := hashes[doneIndex:sliceEnd]
 
-		query := "SELECT hash FROM blob_ WHERE is_stored = ? && hash IN (" + qt.Qs(len(batch)) + ")"
-		args := make([]interface{}, len(batch)+1)
-		args[0] = true
-		for i := range batch {
-			args[i+1] = batch[i]
+		var query string
+		if s.TrackAccess == TrackAccessBlobs {
+			query = `SELECT b.hash, b.id, NULL, b.last_accessed_at
+FROM blob_ b
+WHERE b.is_stored = 1 and b.hash IN (` + qt.Qs(len(batch)) + `)`
+		} else if s.TrackAccess == TrackAccessStreams {
+			query = `SELECT b.hash, b.id, s.id, s.last_accessed_at
+FROM blob_ b
+LEFT JOIN stream_blob sb ON b.id = sb.blob_id
+INNER JOIN stream s on (sb.stream_id = s.id or s.sd_blob_id = b.id)
+WHERE b.is_stored = 1 and b.hash IN (` + qt.Qs(len(batch)) + `)`
+		} else {
+			query = `SELECT b.hash, b.id, NULL, NULL
+FROM blob_ b
+WHERE b.is_stored = 1 and b.hash IN (` + qt.Qs(len(batch)) + `)`
 		}
 
-		logQuery(query, args...)
+		args := make([]interface{}, len(batch))
+		for i := range batch {
+			args[i] = batch[i]
+		}
+
+		s.logQuery(query, args...)
 
 		err := func() error {
 			startTime := time.Now()
@@ -164,11 +371,18 @@ func (s *SQL) HasBlobs(hashes []string) (map[string]bool, error) {
 			defer closeRows(rows)
 
 			for rows.Next() {
-				err := rows.Scan(&hash)
+				err := rows.Scan(&hash, &blobID, &streamID, &lastAccessedAt)
 				if err != nil {
 					return errors.Err(err)
 				}
 				exists[hash] = true
+				if !lastAccessedAt.Valid || lastAccessedAt.Time.Before(touchDeadline) {
+					if s.TrackAccess == TrackAccessBlobs {
+						needsTouch = append(needsTouch, blobID)
+					} else if s.TrackAccess == TrackAccessStreams && !streamID.IsZero() {
+						needsTouch = append(needsTouch, streamID.Uint64)
+					}
+				}
 			}
 
 			err = rows.Err()
@@ -180,15 +394,21 @@ func (s *SQL) HasBlobs(hashes []string) (map[string]bool, error) {
 			return nil
 		}()
 		if err != nil {
-			return nil, err
+			return nil, nil, err
 		}
 	}
 
-	return exists, nil
+	return exists, needsTouch, nil
 }
 
-// Delete will remove the blob from the db
+// Delete will remove (or soft-delete) the blob from the db
+// NOTE: If SoftDelete is enabled, streams will never be deleted
 func (s *SQL) Delete(hash string) error {
+	if s.SoftDelete {
+		_, err := s.exec("UPDATE blob_ SET is_stored = 0 WHERE hash = ?", hash)
+		return errors.Err(err)
+	}
+
 	_, err := s.exec("DELETE FROM stream WHERE sd_blob_id = (SELECT id FROM blob_ WHERE hash = ?)", hash)
 	if err != nil {
 		return errors.Err(err)
@@ -198,11 +418,59 @@ func (s *SQL) Delete(hash string) error {
 	return errors.Err(err)
 }
 
+// LeastRecentlyAccessedHashes gets the least recently accessed blobs
+func (s *SQL) LeastRecentlyAccessedHashes(maxBlobs int) ([]string, error) {
+	if s.conn == nil {
+		return nil, errors.Err("not connected")
+	}
+
+	if s.TrackAccess != TrackAccessBlobs {
+		return nil, errors.Err("blob access tracking is disabled")
+	}
+
+	query := "SELECT hash from blob_ where is_stored = 1 order by last_accessed_at limit ?"
+	s.logQuery(query, maxBlobs)
+
+	rows, err := s.conn.Query(query, maxBlobs)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+	defer closeRows(rows)
+
+	blobs := make([]string, 0, maxBlobs)
+	for rows.Next() {
+		var hash string
+		err := rows.Scan(&hash)
+		if err != nil {
+			return nil, errors.Err(err)
+		}
+		blobs = append(blobs, hash)
+	}
+
+	return blobs, nil
+}
+
+func (s *SQL) Count() (int, error) {
+	if s.conn == nil {
+		return 0, errors.Err("not connected")
+	}
+
+	query := "SELECT count(id) from blob_"
+	if s.SoftDelete {
+		query += " where is_stored = 1"
+	}
+	s.logQuery(query)
+
+	var count int
+	err := s.conn.QueryRow(query).Scan(&count)
+	return count, errors.Err(err)
+}
+
 // Block will mark a blob as blocked
 func (s *SQL) Block(hash string) error {
 	query := "INSERT IGNORE INTO blocked SET hash = ?"
 	args := []interface{}{hash}
-	logQuery(query, args...)
+	s.logQuery(query, args...)
 	_, err := s.conn.Exec(query, args...)
 	return errors.Err(err)
 }
@@ -210,7 +478,7 @@ func (s *SQL) Block(hash string) error {
 // GetBlocked will return a list of blocked hashes
 func (s *SQL) GetBlocked() (map[string]bool, error) {
 	query := "SELECT hash FROM blocked"
-	logQuery(query)
+	s.logQuery(query)
 	rows, err := s.conn.Query(query)
 	if err != nil {
 		return nil, errors.Err(err)
@@ -253,7 +521,7 @@ func (s *SQL) MissingBlobsForKnownStream(sdHash string) ([]string, error) {
 	`
 	args := []interface{}{sdHash}
 
-	logQuery(query, args...)
+	s.logQuery(query, args...)
 
 	rows, err := s.conn.Query(query, args...)
 	if err != nil {
@@ -309,9 +577,10 @@ func (s *SQL) AddSDBlob(sdHash string, sdBlobLength int, sdBlob SdBlob) error {
 			return err
 		}
 
+		args := []interface{}{streamID, blobID, contentBlob.BlobNum}
 		_, err = s.exec(
-			"INSERT IGNORE INTO stream_blob (stream_id, blob_id, num) VALUES (?,?,?)",
-			streamID, blobID, contentBlob.BlobNum,
+			"INSERT IGNORE INTO stream_blob (stream_id, blob_id, num) VALUES ("+qt.Qs(len(args))+")",
+			args...,
 		)
 		if err != nil {
 			return errors.Err(err)
@@ -331,7 +600,7 @@ func (s *SQL) GetHashRange() (string, string, error) {
 
 	query := "SELECT MIN(hash), MAX(hash) from blob_"
 
-	logQuery(query)
+	s.logQuery(query)
 
 	err := s.conn.QueryRow(query).Scan(&min, &max)
 	return min, max, err
@@ -355,7 +624,7 @@ func (s *SQL) GetStoredHashesInRange(ctx context.Context, start, end bits.Bitmap
 		query := "SELECT hash FROM blob_ WHERE hash >= ? AND hash <= ? AND is_stored = 1"
 		args := []interface{}{start.Hex(), end.Hex()}
 
-		logQuery(query, args...)
+		s.logQuery(query, args...)
 
 		rows, err := s.conn.Query(query, args...)
 		defer closeRows(rows)
@@ -436,7 +705,7 @@ func closeRows(rows *sql.Rows) {
 }
 
 func (s *SQL) exec(query string, args ...interface{}) (int64, error) {
-	logQuery(query, args...)
+	s.logQuery(query, args...)
 	attempt, maxAttempts := 0, 3
 Retry:
 	attempt++
@@ -474,17 +743,22 @@ CREATE TABLE blob_ (
   hash char(96) NOT NULL,
   is_stored TINYINT(1) NOT NULL DEFAULT 0,
   length bigint(20) unsigned DEFAULT NULL,
+  last_accessed_at TIMESTAMP NULL DEFAULT NULL,
   PRIMARY KEY (id),
-  UNIQUE KEY blob_hash_idx (hash)
+  UNIQUE KEY blob_hash_idx (hash),
+  KEY `blob_last_accessed_idx` (`last_accessed_at`),
+  KEY `is_stored_idx` (`is_stored`)
 );
 
 CREATE TABLE stream (
   id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE,
   hash char(96) NOT NULL,
   sd_blob_id BIGINT UNSIGNED NOT NULL,
+  last_accessed_at TIMESTAMP NULL DEFAULT NULL,
   PRIMARY KEY (id),
   UNIQUE KEY stream_hash_idx (hash),
   KEY stream_sd_blob_id_idx (sd_blob_id),
+  KEY last_accessed_at_idx (last_accessed_at),
   FOREIGN KEY (sd_blob_id) REFERENCES blob_ (id) ON DELETE RESTRICT ON UPDATE CASCADE
 );
 

go.mod

@@ -1,31 +1,130 @@
 module github.com/lbryio/reflector.go
 
+go 1.22
+
+replace github.com/btcsuite/btcd => github.com/lbryio/lbrycrd.go v0.0.0-20200203050410-e1076f12bf19
+
 require (
-	github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878 // indirect
-	github.com/aws/aws-sdk-go v1.16.11
-	github.com/davecgh/go-spew v1.1.1
-	github.com/go-sql-driver/mysql v0.0.0-20180719071942-99ff426eb706
-	github.com/golang/protobuf v1.3.1
-	github.com/gorilla/websocket v1.4.0 // indirect
-	github.com/hashicorp/go-msgpack v0.5.5 // indirect
-	github.com/hashicorp/memberlist v0.1.4 // indirect
-	github.com/hashicorp/serf v0.8.2
+	github.com/aws/aws-sdk-go v1.55.5
+	github.com/bluele/gcache v0.0.2
+	github.com/brk0v/directio v0.0.0-20190225130936-69406e757cf7
+	github.com/btcsuite/btcd v0.0.0-20190824003749-130ea5bddde3
+	github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d
+	github.com/c2h5oh/datasize v0.0.0-20231215233829-aa82cc1e6500
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc
+	github.com/ekyoung/gin-nice-recovery v0.0.0-20160510022553-1654dca486db
+	github.com/gin-gonic/gin v1.10.0
+	github.com/go-sql-driver/mysql v1.8.1
+	github.com/gogo/protobuf v1.3.2
+	github.com/golang/protobuf v1.5.4
+	github.com/google/gops v0.3.28
+	github.com/gorilla/mux v1.8.1
+	github.com/hashicorp/serf v0.10.1
 	github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf
-	github.com/inconshreveable/mousetrap v1.0.0 // indirect
-	github.com/johntdyer/slack-go v0.0.0-20180213144715-95fac1160b22 // indirect
-	github.com/johntdyer/slackrus v0.0.0-20180518184837-f7aae3243a07
-	github.com/lbryio/lbry.go v0.0.0-20190828131228-f3a1fbdd5303
-	github.com/lbryio/types v0.0.0-20190422033210-321fb2abda9c
-	github.com/phayes/freeport v0.0.0-20171002185219-e27662a4a9d6
-	github.com/sirupsen/logrus v1.3.0
-	github.com/spf13/cast v1.3.0 // indirect
-	github.com/spf13/cobra v0.0.0-20180722215644-7c4570c3ebeb
-	github.com/spf13/pflag v1.0.3 // indirect
-	github.com/uber-go/atomic v1.3.2
-	golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c // indirect
-	golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c // indirect
-	golang.org/x/sync v0.0.0-20190423024810-112230192c58 // indirect
-	golang.org/x/sys v0.0.0-20190523142557-0e01d883c5c5 // indirect
-	golang.org/x/text v0.3.2 // indirect
-	google.golang.org/appengine v1.4.0 // indirect
+	github.com/johntdyer/slackrus v0.0.0-20230315191314-80bc92dee4fc
+	github.com/karrick/godirwalk v1.17.0
+	github.com/lbryio/chainquery v1.9.1-0.20240927170248-48c092515dea
+	github.com/lbryio/lbry.go/v2 v2.7.2-0.20230307181431-a01aa6dc0629
+	github.com/lbryio/types v0.0.0-20220224142228-73610f6654a6
+	github.com/phayes/freeport v0.0.0-20220201140144-74d24b5ae9f5
+	github.com/prometheus/client_golang v1.20.5
+	github.com/quic-go/quic-go v0.48.2
+	github.com/sirupsen/logrus v1.9.3
+	github.com/spf13/cast v1.6.0
+	github.com/spf13/cobra v1.8.0
+	github.com/stretchr/testify v1.9.0
+	github.com/volatiletech/null/v8 v8.1.2
+	go.uber.org/atomic v1.11.0
+	golang.org/x/sync v0.8.0
+)
+
+require (
+	filippo.io/edwards25519 v1.1.0 // indirect
+	github.com/armon/go-metrics v0.4.1 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f // indirect
+	github.com/btcsuite/go-socks v0.0.0-20170105172521-4720035b7bfd // indirect
+	github.com/btcsuite/websocket v0.0.0-20150119174127-31079b680792 // indirect
+	github.com/bytedance/sonic v1.11.6 // indirect
+	github.com/bytedance/sonic/loader v0.1.1 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/cloudwego/base64x v0.1.4 // indirect
+	github.com/cloudwego/iasm v0.2.0 // indirect
+	github.com/friendsofgo/errors v0.9.2 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-errors/errors v1.4.2 // indirect
+	github.com/go-ini/ini v1.67.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.20.0 // indirect
+	github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/gofrs/uuid v4.2.0+incompatible // indirect
+	github.com/google/btree v1.0.0 // indirect
+	github.com/google/pprof v0.0.0-20211214055906-6f57359322fd // indirect
+	github.com/gorilla/rpc v1.2.0 // indirect
+	github.com/gorilla/websocket v1.5.1 // indirect
+	github.com/hashicorp/errwrap v1.1.0 // indirect
+	github.com/hashicorp/go-immutable-radix v1.3.1 // indirect
+	github.com/hashicorp/go-msgpack v0.5.3 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
+	github.com/hashicorp/go-sockaddr v1.0.0 // indirect
+	github.com/hashicorp/golang-lru v0.5.4 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/hashicorp/memberlist v0.5.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/johntdyer/slack-go v0.0.0-20230314151037-c5bf334f9b6e // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/lyoshenka/bencode v0.0.0-20180323155644-b7abd7672df5 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/miekg/dns v1.1.41 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/onsi/ginkgo/v2 v2.9.5 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/prometheus/client_model v0.6.1 // indirect
+	github.com/prometheus/common v0.55.0 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
+	github.com/quic-go/qpack v0.5.1 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529 // indirect
+	github.com/shopspring/decimal v1.3.1 // indirect
+	github.com/slack-go/slack v0.12.1 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/spf13/viper v1.18.2 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.12 // indirect
+	github.com/volatiletech/inflect v0.0.1 // indirect
+	github.com/volatiletech/randomize v0.0.1 // indirect
+	github.com/volatiletech/strmangle v0.0.6 // indirect
+	go.uber.org/mock v0.4.0 // indirect
+	go.uber.org/multierr v1.9.0 // indirect
+	golang.org/x/arch v0.8.0 // indirect
+	golang.org/x/crypto v0.26.0 // indirect
+	golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842 // indirect
+	golang.org/x/mod v0.17.0 // indirect
+	golang.org/x/net v0.28.0 // indirect
+	golang.org/x/sys v0.23.0 // indirect
+	golang.org/x/text v0.17.0 // indirect
+	golang.org/x/time v0.5.0 // indirect
+	golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect
+	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
+	google.golang.org/protobuf v1.34.2 // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
+	gopkg.in/nullbio/null.v6 v6.0.0-20161116030900-40264a2e6b79 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,73 +1,151 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/DataDog/datadog-go v2.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
+filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
+filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
+github.com/DataDog/datadog-go v3.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
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 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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internal/metrics/metrics.go

@@ -0,0 +1,339 @@
+package metrics
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"io"
+	"net/http"
+	"strings"
+	"syscall"
+	"time"
+
+	ee "github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	log "github.com/sirupsen/logrus"
+)
+
+type Server struct {
+	srv  *http.Server
+	stop *stop.Stopper
+}
+
+func NewServer(address string, path string) *Server {
+	h := http.NewServeMux()
+	h.Handle(path, promhttp.Handler())
+	return &Server{
+		srv: &http.Server{
+			Addr:    address,
+			Handler: h,
+			//https://blog.cloudflare.com/the-complete-guide-to-golang-net-http-timeouts/
+			//https://blog.cloudflare.com/exposing-go-on-the-internet/
+			ReadTimeout:  5 * time.Second,
+			WriteTimeout: 10 * time.Second,
+			IdleTimeout:  120 * time.Second,
+		},
+		stop: stop.New(),
+	}
+}
+
+func (s *Server) Start() {
+	s.stop.Add(1)
+	go func() {
+		defer s.stop.Done()
+		err := s.srv.ListenAndServe()
+		if err != nil && !errors.Is(err, http.ErrServerClosed) {
+			log.Error(err)
+		}
+	}()
+}
+
+func (s *Server) Shutdown() {
+	_ = s.srv.Shutdown(context.Background())
+	s.stop.StopAndWait()
+}
+
+const (
+	ns             = "reflector"
+	subsystemCache = "cache"
+	subsystemITTT  = "ittt"
+
+	labelDirection = "direction"
+	labelErrorType = "error_type"
+
+	DirectionUpload   = "upload"   // to reflector
+	DirectionDownload = "download" // from reflector
+
+	LabelCacheType = "cache_type"
+	LabelComponent = "component"
+	LabelSource    = "source"
+
+	errConnReset         = "conn_reset"
+	errReadConnReset     = "read_conn_reset"
+	errWriteConnReset    = "write_conn_reset"
+	errReadConnTimedOut  = "read_conn_timed_out"
+	errNoNetworkActivity = "no_network_activity"
+	errWriteConnTimedOut = "write_conn_timed_out"
+	errWriteBrokenPipe   = "write_broken_pipe"
+	errEPipe             = "e_pipe"
+	errETimedout         = "e_timedout"
+	errIOTimeout         = "io_timeout"
+	errUnexpectedEOF     = "unexpected_eof"
+	errUnexpectedEOFStr  = "unexpected_eof_str"
+	errJSONSyntax        = "json_syntax"
+	errBlobTooBig        = "blob_too_big"
+	errInvalidPeerJSON   = "invalid_peer_json"
+	errInvalidPeerData   = "invalid_peer_data"
+	errRequestTooLarge   = "request_too_large"
+	errDeadlineExceeded  = "deadline_exceeded"
+	errHashMismatch      = "hash_mismatch"
+	errProtectedBlob     = "protected_blob"
+	errInvalidBlobHash   = "invalid_blob_hash"
+	errZeroByteBlob      = "zero_byte_blob"
+	errInvalidCharacter  = "invalid_character"
+	errBlobNotFound      = "blob_not_found"
+	errNoErr             = "no_error"
+	errQuicProto         = "quic_protocol_violation"
+	errOther             = "other"
+)
+
+var (
+	ErrorCount = promauto.NewCounterVec(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "error_total",
+		Help:      "Total number of errors",
+	}, []string{labelDirection, labelErrorType})
+
+	BlobDownloadCount = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "blob_download_total",
+		Help:      "Total number of blobs downloaded from reflector",
+	})
+	PeerDownloadCount = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "peer_download_total",
+		Help:      "Total number of blobs downloaded from reflector through tcp protocol",
+	})
+	Http3DownloadCount = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "http3_blob_download_total",
+		Help:      "Total number of blobs downloaded from reflector through QUIC protocol",
+	})
+	HttpDownloadCount = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "http_blob_download_total",
+		Help:      "Total number of blobs downloaded from reflector through HTTP protocol",
+	})
+
+	CacheHitCount = promauto.NewCounterVec(prometheus.CounterOpts{
+		Namespace: ns,
+		Subsystem: subsystemCache,
+		Name:      "hit_total",
+		Help:      "Total number of blobs retrieved from the cache storage",
+	}, []string{LabelCacheType, LabelComponent})
+	ThisHitCount = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Subsystem: subsystemITTT,
+		Name:      "this_hit_total",
+		Help:      "Total number of blobs retrieved from the this storage",
+	})
+	ThatHitCount = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Subsystem: subsystemITTT,
+		Name:      "that_hit_total",
+		Help:      "Total number of blobs retrieved from the that storage",
+	})
+	CacheMissCount = promauto.NewCounterVec(prometheus.CounterOpts{
+		Namespace: ns,
+		Subsystem: subsystemCache,
+		Name:      "miss_total",
+		Help:      "Total number of blobs retrieved from origin rather than cache storage",
+	}, []string{LabelCacheType, LabelComponent})
+	CacheOriginRequestsCount = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: ns,
+		Subsystem: subsystemCache,
+		Name:      "origin_requests_total",
+		Help:      "How many Get requests are in flight from the cache to the origin",
+	}, []string{LabelCacheType, LabelComponent})
+	//during thundering-herd situations, the metric below should be a lot smaller than the metric above
+	CacheWaitingRequestsCount = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: ns,
+		Subsystem: subsystemCache,
+		Name:      "waiting_requests_total",
+		Help:      "How many cache requests are waiting for an in-flight origin request",
+	}, []string{LabelCacheType, LabelComponent})
+	CacheLRUEvictCount = promauto.NewCounterVec(prometheus.CounterOpts{
+		Namespace: ns,
+		Subsystem: subsystemCache,
+		Name:      "evict_total",
+		Help:      "Count of blobs evicted from cache",
+	}, []string{LabelCacheType, LabelComponent})
+	CacheRetrievalSpeed = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: ns,
+		Name:      "speed_mbps",
+		Help:      "Speed of blob retrieval from cache or from origin",
+	}, []string{LabelCacheType, LabelComponent, LabelSource})
+
+	BlobUploadCount = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "blob_upload_total",
+		Help:      "Total number of blobs uploaded to reflector",
+	})
+	SDBlobUploadCount = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "sdblob_upload_total",
+		Help:      "Total number of SD blobs (and therefore streams) uploaded to reflector",
+	})
+
+	MtrInBytesTcp = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "tcp_in_bytes",
+		Help:      "Total number of bytes downloaded through TCP",
+	})
+	MtrOutBytesTcp = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "tcp_out_bytes",
+		Help:      "Total number of bytes streamed out through TCP",
+	})
+	MtrInBytesUdp = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "udp_in_bytes",
+		Help:      "Total number of bytes downloaded through UDP",
+	})
+	MtrInBytesHttp = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "http_in_bytes",
+		Help:      "Total number of bytes downloaded through HTTP",
+	})
+	MtrOutBytesUdp = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "udp_out_bytes",
+		Help:      "Total number of bytes streamed out through UDP",
+	})
+	MtrOutBytesHttp = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "http_out_bytes",
+		Help:      "Total number of bytes streamed out through UDP",
+	})
+	MtrInBytesReflector = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "reflector_in_bytes",
+		Help:      "Total number of incoming bytes (from users)",
+	})
+	MtrOutBytesReflector = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "s3_out_bytes",
+		Help:      "Total number of outgoing bytes (to S3)",
+	})
+	MtrInBytesS3 = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "s3_in_bytes",
+		Help:      "Total number of incoming bytes (from S3-CF)",
+	})
+	Http3BlobReqQueue = promauto.NewGauge(prometheus.GaugeOpts{
+		Namespace: ns,
+		Name:      "http3_blob_request_queue_size",
+		Help:      "Blob requests of https queue size",
+	})
+	HttpBlobReqQueue = promauto.NewGauge(prometheus.GaugeOpts{
+		Namespace: ns,
+		Name:      "http_blob_request_queue_size",
+		Help:      "Blob requests queue size of the HTTP protocol",
+	})
+	RoutinesQueue = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: ns,
+		Name:      "routines",
+		Help:      "routines running by type",
+	}, []string{"package", "kind"})
+)
+
+func CacheLabels(name, component string) prometheus.Labels {
+	return prometheus.Labels{
+		LabelCacheType: name,
+		LabelComponent: component,
+	}
+}
+
+func TrackError(direction string, e error) (shouldLog bool) { // shouldLog is a hack, but whatever
+	if e == nil {
+		return
+	}
+
+	err := ee.Wrap(e, 0)
+	errType := errOther
+	if strings.Contains(err.Error(), "i/o timeout") {
+		errType = errIOTimeout
+	} else if errors.Is(e, syscall.ECONNRESET) {
+		// Looks like we're getting this when direction == "download", but read_conn_reset and
+		// write_conn_reset when its "upload"
+		errType = errConnReset
+	} else if errors.Is(e, context.DeadlineExceeded) {
+		errType = errDeadlineExceeded
+	} else if strings.Contains(err.Error(), "read: connection reset by peer") { // the other side closed the connection using TCP reset
+		errType = errReadConnReset
+	} else if strings.Contains(err.Error(), "write: connection reset by peer") { // the other side closed the connection using TCP reset
+		errType = errWriteConnReset
+	} else if errors.Is(e, syscall.ETIMEDOUT) {
+		errType = errETimedout
+	} else if strings.Contains(err.Error(), "read: connection timed out") { // the other side closed the connection using TCP reset
+		//log.Warnln("read conn timed out is not the same as ETIMEDOUT")
+		errType = errReadConnTimedOut
+	} else if strings.Contains(err.Error(), "NO_ERROR: No recent network activity") { // the other side closed the QUIC connection
+		//log.Warnln("read conn timed out is not the same as ETIMEDOUT")
+		errType = errNoNetworkActivity
+	} else if strings.Contains(err.Error(), "write: connection timed out") {
+		errType = errWriteConnTimedOut
+	} else if errors.Is(e, io.ErrUnexpectedEOF) {
+		errType = errUnexpectedEOF
+	} else if strings.Contains(err.Error(), "unexpected EOF") { // tried to read from closed pipe or socket
+		errType = errUnexpectedEOFStr
+	} else if errors.Is(e, syscall.EPIPE) {
+		errType = errEPipe
+	} else if strings.Contains(err.Error(), "write: broken pipe") { // tried to write to a pipe or socket that was closed by the peer
+		// I believe this is the same as EPipe when direction == "download", but not for upload
+		errType = errWriteBrokenPipe
+		//} else if errors.Is(e, reflector.ErrBlobTooBig) { # this creates a circular import
+		//	errType = errBlobTooBig
+	} else if strings.Contains(err.Error(), "blob must be at most") {
+		//log.Warnln("blob must be at most X bytes is not the same as ErrBlobTooBig")
+		errType = errBlobTooBig
+	} else if strings.Contains(err.Error(), "invalid json request") {
+		errType = errInvalidPeerJSON
+	} else if strings.Contains(err.Error(), "Invalid data") {
+		errType = errInvalidPeerData
+	} else if strings.Contains(err.Error(), "request is too large") {
+		errType = errRequestTooLarge
+	} else if strings.Contains(err.Error(), "Invalid blob hash length") {
+		errType = errInvalidBlobHash
+	} else if strings.Contains(err.Error(), "hash of received blob data does not match hash from send request") {
+		errType = errHashMismatch
+	} else if strings.Contains(err.Error(), "blob not found") {
+		errType = errBlobNotFound
+	} else if strings.Contains(err.Error(), "requested blob is protected") {
+		errType = errProtectedBlob
+	} else if strings.Contains(err.Error(), "0-byte blob received") {
+		errType = errZeroByteBlob
+	} else if strings.Contains(err.Error(), "PROTOCOL_VIOLATION: tried to retire connection") {
+		errType = errQuicProto
+	} else if strings.Contains(err.Error(), "invalid character") {
+		errType = errInvalidCharacter
+	} else if _, ok := e.(*json.SyntaxError); ok {
+		errType = errJSONSyntax
+	} else if strings.Contains(err.Error(), "NO_ERROR") {
+		errType = errNoErr
+	} else {
+		log.Warnf("error '%s' for direction '%s' is not being tracked", err.TypeName(), direction)
+		shouldLog = true
+	}
+
+	ErrorCount.With(map[string]string{
+		labelDirection: direction,
+		labelErrorType: errType,
+	}).Inc()
+
+	return
+}

lite_db/db.go

@@ -0,0 +1,347 @@
+package lite_db
+
+import (
+	"database/sql"
+	"time"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	qt "github.com/lbryio/lbry.go/v2/extras/query"
+
+	"github.com/go-sql-driver/mysql"
+	log "github.com/sirupsen/logrus"
+	"github.com/volatiletech/null/v8"
+)
+
+// SdBlob is a special blob that contains information on the rest of the blobs in the stream
+type SdBlob struct {
+	StreamName string `json:"stream_name"`
+	Blobs      []struct {
+		Length   int    `json:"length"`
+		BlobNum  int    `json:"blob_num"`
+		BlobHash string `json:"blob_hash,omitempty"`
+		IV       string `json:"iv"`
+	} `json:"blobs"`
+	StreamType        string `json:"stream_type"`
+	Key               string `json:"key"`
+	SuggestedFileName string `json:"suggested_file_name"`
+	StreamHash        string `json:"stream_hash"`
+}
+
+// SQL implements the DB interface
+type SQL struct {
+	conn *sql.DB
+
+	TrackAccessTime bool
+}
+
+func logQuery(query string, args ...interface{}) {
+	s, err := qt.InterpolateParams(query, args...)
+	if err != nil {
+		log.Errorln(err)
+	} else {
+		log.Debugln(s)
+	}
+}
+
+// Connect will create a connection to the database
+func (s *SQL) Connect(dsn string) error {
+	var err error
+	// interpolateParams is necessary. otherwise uploading a stream with thousands of blobs
+	// will hit MySQL's max_prepared_stmt_count limit because the prepared statements are all
+	// opened inside a transaction. closing them manually doesn't seem to help
+	dsn += "?parseTime=1&collation=utf8mb4_unicode_ci&interpolateParams=1"
+	s.conn, err = sql.Open("mysql", dsn)
+	if err != nil {
+		return errors.Err(err)
+	}
+
+	s.conn.SetMaxIdleConns(12)
+
+	return errors.Err(s.conn.Ping())
+}
+
+// AddBlob adds a blob to the database.
+func (s *SQL) AddBlob(hash string, length int) error {
+	if s.conn == nil {
+		return errors.Err("not connected")
+	}
+
+	_, err := s.insertBlob(hash, length)
+	return err
+}
+
+func (s *SQL) insertBlob(hash string, length int) (int64, error) {
+	if length <= 0 {
+		return 0, errors.Err("length must be positive")
+	}
+	const isStored = true
+	now := time.Now()
+	args := []interface{}{hash, isStored, length, now}
+	blobID, err := s.exec(
+		"INSERT INTO blob_ (hash, is_stored, length, last_accessed_at) VALUES ("+qt.Qs(len(args))+") ON DUPLICATE KEY UPDATE is_stored = (is_stored or VALUES(is_stored)), last_accessed_at=VALUES(last_accessed_at)",
+		args...,
+	)
+	if err != nil {
+		return 0, err
+	}
+
+	if blobID == 0 {
+		err = s.conn.QueryRow("SELECT id FROM blob_ WHERE hash = ?", hash).Scan(&blobID)
+		if err != nil {
+			return 0, errors.Err(err)
+		}
+		if blobID == 0 {
+			return 0, errors.Err("blob ID is 0 even after INSERTing and SELECTing")
+		}
+	}
+
+	return blobID, nil
+}
+
+// HasBlob checks if the database contains the blob information.
+func (s *SQL) HasBlob(hash string) (bool, error) {
+	exists, err := s.HasBlobs([]string{hash})
+	if err != nil {
+		return false, err
+	}
+	return exists[hash], nil
+}
+
+// HasBlobs checks if the database contains the set of blobs and returns a bool map.
+func (s *SQL) HasBlobs(hashes []string) (map[string]bool, error) {
+	exists, streamsNeedingTouch, err := s.hasBlobs(hashes)
+	_ = s.touch(streamsNeedingTouch)
+	return exists, err
+}
+
+func (s *SQL) touch(blobIDs []uint64) error {
+	if len(blobIDs) == 0 {
+		return nil
+	}
+
+	query := "UPDATE blob_ SET last_accessed_at = ? WHERE id IN (" + qt.Qs(len(blobIDs)) + ")"
+	args := make([]interface{}, len(blobIDs)+1)
+	args[0] = time.Now()
+	for i := range blobIDs {
+		args[i+1] = blobIDs[i]
+	}
+
+	startTime := time.Now()
+	_, err := s.exec(query, args...)
+	log.Debugf("blobs access query touched %d blobs and took %s", len(blobIDs), time.Since(startTime))
+	return errors.Err(err)
+}
+
+func (s *SQL) hasBlobs(hashes []string) (map[string]bool, []uint64, error) {
+	if s.conn == nil {
+		return nil, nil, errors.Err("not connected")
+	}
+
+	var (
+		hash           string
+		blobID         uint64
+		lastAccessedAt null.Time
+	)
+
+	var needsTouch []uint64
+	exists := make(map[string]bool)
+
+	touchDeadline := time.Now().AddDate(0, 0, -1) // touch blob if last accessed before this time
+	maxBatchSize := 10000
+	doneIndex := 0
+
+	for len(hashes) > doneIndex {
+		sliceEnd := doneIndex + maxBatchSize
+		if sliceEnd > len(hashes) {
+			sliceEnd = len(hashes)
+		}
+		log.Debugf("getting hashes[%d:%d] of %d", doneIndex, sliceEnd, len(hashes))
+		batch := hashes[doneIndex:sliceEnd]
+
+		// TODO: this query doesn't work for SD blobs, which are not in the stream_blob table
+
+		query := `SELECT hash, id, last_accessed_at
+FROM blob_ 
+WHERE is_stored = ? and hash IN (` + qt.Qs(len(batch)) + `)`
+		args := make([]interface{}, len(batch)+1)
+		args[0] = true
+		for i := range batch {
+			args[i+1] = batch[i]
+		}
+
+		logQuery(query, args...)
+
+		err := func() error {
+			startTime := time.Now()
+			rows, err := s.conn.Query(query, args...)
+			log.Debugf("hashes query took %s", time.Since(startTime))
+			if err != nil {
+				return errors.Err(err)
+			}
+			defer closeRows(rows)
+
+			for rows.Next() {
+				err := rows.Scan(&hash, &blobID, &lastAccessedAt)
+				if err != nil {
+					return errors.Err(err)
+				}
+				exists[hash] = true
+				if s.TrackAccessTime && (!lastAccessedAt.Valid || lastAccessedAt.Time.Before(touchDeadline)) {
+					needsTouch = append(needsTouch, blobID)
+				}
+			}
+
+			err = rows.Err()
+			if err != nil {
+				return errors.Err(err)
+			}
+
+			doneIndex += len(batch)
+			return nil
+		}()
+		if err != nil {
+			return nil, nil, err
+		}
+	}
+
+	return exists, needsTouch, nil
+}
+
+// Delete will remove the blob from the db
+func (s *SQL) Delete(hash string) error {
+	_, err := s.exec("UPDATE blob_ set is_stored = ? WHERE hash = ?", 0, hash)
+	return errors.Err(err)
+}
+
+// AddSDBlob insert the SD blob and all the content blobs. The content blobs are marked as "not stored",
+// but they are tracked so reflector knows what it is missing.
+func (s *SQL) AddSDBlob(sdHash string, sdBlobLength int) error {
+	if s.conn == nil {
+		return errors.Err("not connected")
+	}
+
+	_, err := s.insertBlob(sdHash, sdBlobLength)
+	return err
+}
+
+// GetHashRange gets the smallest and biggest hashes in the db
+func (s *SQL) GetLRUBlobs(maxBlobs int) ([]string, error) {
+	if s.conn == nil {
+		return nil, errors.Err("not connected")
+	}
+
+	query := "SELECT hash from blob_ where is_stored = ? order by last_accessed_at limit ?"
+	const isStored = true
+	logQuery(query, isStored, maxBlobs)
+	rows, err := s.conn.Query(query, isStored, maxBlobs)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+	defer closeRows(rows)
+	blobs := make([]string, 0, maxBlobs)
+	for rows.Next() {
+		var hash string
+		err := rows.Scan(&hash)
+		if err != nil {
+			return nil, errors.Err(err)
+		}
+		blobs = append(blobs, hash)
+	}
+	return blobs, nil
+}
+
+func (s *SQL) AllBlobs() ([]string, error) {
+	if s.conn == nil {
+		return nil, errors.Err("not connected")
+	}
+
+	query := "SELECT hash from blob_ where is_stored = ?" //TODO: maybe sorting them makes more sense?
+	const isStored = true
+	logQuery(query, isStored)
+	rows, err := s.conn.Query(query, isStored)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+	defer closeRows(rows)
+	totalBlobs, err := s.BlobsCount()
+	if err != nil {
+		return nil, err
+	}
+	blobs := make([]string, 0, totalBlobs)
+	for rows.Next() {
+		var hash string
+		err := rows.Scan(&hash)
+		if err != nil {
+			return nil, errors.Err(err)
+		}
+		blobs = append(blobs, hash)
+	}
+	return blobs, nil
+}
+
+func (s *SQL) BlobsCount() (int, error) {
+	if s.conn == nil {
+		return 0, errors.Err("not connected")
+	}
+
+	query := "SELECT count(id) from blob_ where is_stored = ?" //TODO: maybe sorting them makes more sense?
+	const isStored = true
+	logQuery(query, isStored)
+	var count int
+	err := s.conn.QueryRow(query, isStored).Scan(&count)
+	return count, errors.Err(err)
+}
+
+func closeRows(rows *sql.Rows) {
+	if rows != nil {
+		err := rows.Close()
+		if err != nil {
+			log.Error("error closing rows: ", err)
+		}
+	}
+}
+
+func (s *SQL) exec(query string, args ...interface{}) (int64, error) {
+	logQuery(query, args...)
+	attempt, maxAttempts := 0, 3
+Retry:
+	attempt++
+	result, err := s.conn.Exec(query, args...)
+	if isLockTimeoutError(err) {
+		if attempt <= maxAttempts {
+			//Error 1205: Lock wait timeout exceeded; try restarting transaction
+			goto Retry
+		}
+		err = errors.Prefix("Lock timeout for query "+query, err)
+	}
+
+	if err != nil {
+		return 0, errors.Err(err)
+	}
+
+	lastID, err := result.LastInsertId()
+	return lastID, errors.Err(err)
+}
+
+func isLockTimeoutError(err error) bool {
+	e, ok := err.(*mysql.MySQLError)
+	return ok && e != nil && e.Number == 1205
+}
+
+/*  SQL schema
+
+in prod make sure you use latin1 or utf8 charset, NOT utf8mb4. that's a waste of space.
+
+CREATE TABLE `blob_` (
+  `id` bigint unsigned NOT NULL AUTO_INCREMENT,
+  `hash` char(96) NOT NULL,
+  `is_stored` tinyint(1) NOT NULL DEFAULT '0',
+  `length` bigint unsigned DEFAULT NULL,
+  `last_accessed_at` datetime DEFAULT CURRENT_TIMESTAMP,
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `id` (`id`),
+  UNIQUE KEY `blob_hash_idx` (`hash`),
+  KEY `blob_last_accessed_idx` (`last_accessed_at`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+
+*/

main.go

@@ -1,13 +1,15 @@
 package main
 
 import (
-	"math/rand"
-	"time"
-
 	"github.com/lbryio/reflector.go/cmd"
+
+	"github.com/google/gops/agent"
+	log "github.com/sirupsen/logrus"
 )
 
 func main() {
-	rand.Seed(time.Now().UnixNano())
+	if err := agent.Listen(agent.Options{}); err != nil {
+		log.Fatal(err)
+	}
 	cmd.Execute()
 }

meta/meta.go

@@ -1,20 +1,58 @@
 package meta
 
 import (
+	"fmt"
 	"strconv"
 	"time"
 )
 
-var Version = ""
-var Time = ""
-var BuildTime time.Time
+var (
+	name       = "prism-bin"
+	version    = "unknown"
+	commit     = "unknown"
+	commitLong = "unknown"
+	branch     = "unknown"
+	Time       = "unknown"
+	BuildTime  time.Time
+)
+
+// Name returns main application name
+func Name() string {
+	return name
+}
+
+// Version returns current application version
+func Version() string {
+	return version
+}
+
+// FullName returns current app version, commit and build time
+func FullName() string {
+	return fmt.Sprintf(
+		`Name: %v
+Version: %v
+branch: %v
+commit: %v
+commit long: %v
+build date: %v`, Name(), Version(), branch, commit, commitLong, BuildTime.String())
+}
 
 func init() {
 	if Time != "" {
 		t, err := strconv.Atoi(Time)
-		if err != nil {
-			return
-		}
+		if err == nil {
 			BuildTime = time.Unix(int64(t), 0).UTC()
 		}
 	}
+}
+
+func VersionString() string {
+	var buildTime string
+	if BuildTime.IsZero() {
+		buildTime = "<now>"
+	} else {
+		buildTime = BuildTime.Format(time.RFC3339)
+	}
+
+	return fmt.Sprintf("version %s, built %s", version, buildTime)
+}

prism/prism.go

@@ -5,16 +5,16 @@ import (
 	"strconv"
 	"sync"
 
-	"github.com/lbryio/lbry.go/dht"
-	"github.com/lbryio/lbry.go/dht/bits"
 	"github.com/lbryio/reflector.go/cluster"
 	"github.com/lbryio/reflector.go/db"
-	"github.com/lbryio/reflector.go/peer"
 	"github.com/lbryio/reflector.go/reflector"
+	"github.com/lbryio/reflector.go/server/peer"
 	"github.com/lbryio/reflector.go/store"
 
-	"github.com/lbryio/lbry.go/extras/errors"
-	"github.com/lbryio/lbry.go/extras/stop"
+	"github.com/lbryio/lbry.go/v2/dht"
+	"github.com/lbryio/lbry.go/v2/dht/bits"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -79,7 +79,7 @@ func New(conf *Config) *Prism {
 		dht:       d,
 		cluster:   c,
 		peer:      peer.NewServer(conf.Blobs),
-		reflector: reflector.NewServer(conf.Blobs),
+		reflector: reflector.NewServer(conf.Blobs, conf.Blobs),
 
 		grp: stop.New(),
 	}

prism/prism_test.go

@@ -4,8 +4,9 @@ import (
 	"math/big"
 	"testing"
 
+	"github.com/lbryio/lbry.go/v2/dht/bits"
+
 	"github.com/davecgh/go-spew/spew"
-	"github.com/lbryio/lbry.go/dht/bits"
 )
 
 func TestAnnounceRange(t *testing.T) {

publish/mimetypes.go

@@ -0,0 +1,174 @@
+package publish
+
+import "strings"
+
+func guessMimeType(ext string) (string, string) {
+	if ext == "" {
+		return "application/octet-stream", "binary"
+	}
+
+	ext = strings.ToLower(strings.TrimLeft(strings.TrimSpace(ext), "."))
+
+	types := map[string]struct{ mime, t string }{
+		"a":        {"application/octet-stream", "binary"},
+		"ai":       {"application/postscript", "image"},
+		"aif":      {"audio/x-aiff", "audio"},
+		"aifc":     {"audio/x-aiff", "audio"},
+		"aiff":     {"audio/x-aiff", "audio"},
+		"au":       {"audio/basic", "audio"},
+		"avi":      {"video/x-msvideo", "video"},
+		"bat":      {"text/plain", "document"},
+		"bcpio":    {"application/x-bcpio", "binary"},
+		"bin":      {"application/octet-stream", "binary"},
+		"bmp":      {"image/bmp", "image"},
+		"c":        {"text/plain", "document"},
+		"cdf":      {"application/x-netcdf", "binary"},
+		"cpio":     {"application/x-cpio", "binary"},
+		"csh":      {"application/x-csh", "binary"},
+		"css":      {"text/css", "document"},
+		"csv":      {"text/csv", "document"},
+		"dll":      {"application/octet-stream", "binary"},
+		"doc":      {"application/msword", "document"},
+		"dot":      {"application/msword", "document"},
+		"dvi":      {"application/x-dvi", "binary"},
+		"eml":      {"message/rfc822", "document"},
+		"eps":      {"application/postscript", "document"},
+		"epub":     {"application/epub+zip", "document"},
+		"etx":      {"text/x-setext", "document"},
+		"exe":      {"application/octet-stream", "binary"},
+		"gif":      {"image/gif", "image"},
+		"gtar":     {"application/x-gtar", "binary"},
+		"h":        {"text/plain", "document"},
+		"hdf":      {"application/x-hdf", "binary"},
+		"htm":      {"text/html", "document"},
+		"html":     {"text/html", "document"},
+		"ico":      {"image/vnd.microsoft.icon", "image"},
+		"ief":      {"image/ief", "image"},
+		"iges":     {"model/iges", "model"},
+		"jpe":      {"image/jpeg", "image"},
+		"jpeg":     {"image/jpeg", "image"},
+		"jpg":      {"image/jpeg", "image"},
+		"js":       {"application/javascript", "document"},
+		"json":     {"application/json", "document"},
+		"ksh":      {"text/plain", "document"},
+		"latex":    {"application/x-latex", "binary"},
+		"m1v":      {"video/mpeg", "video"},
+		"m3u":      {"application/vnd.apple.mpegurl", "audio"},
+		"m3u8":     {"application/vnd.apple.mpegurl", "audio"},
+		"man":      {"application/x-troff-man", "document"},
+		"markdown": {"text/markdown", "document"},
+		"md":       {"text/markdown", "document"},
+		"me":       {"application/x-troff-me", "binary"},
+		"mht":      {"message/rfc822", "document"},
+		"mhtml":    {"message/rfc822", "document"},
+		"mif":      {"application/x-mif", "binary"},
+		"mov":      {"video/quicktime", "video"},
+		"movie":    {"video/x-sgi-movie", "video"},
+		"mp2":      {"audio/mpeg", "audio"},
+		"mp3":      {"audio/mpeg", "audio"},
+		"mp4":      {"video/mp4", "video"},
+		"mpa":      {"video/mpeg", "video"},
+		"mpe":      {"video/mpeg", "video"},
+		"mpeg":     {"video/mpeg", "video"},
+		"mpg":      {"video/mpeg", "video"},
+		"ms":       {"application/x-troff-ms", "binary"},
+		"nc":       {"application/x-netcdf", "binary"},
+		"nws":      {"message/rfc822", "document"},
+		"o":        {"application/octet-stream", "binary"},
+		"obj":      {"application/octet-stream", "model"},
+		"oda":      {"application/oda", "binary"},
+		"p12":      {"application/x-pkcs12", "binary"},
+		"p7c":      {"application/pkcs7-mime", "binary"},
+		"pbm":      {"image/x-portable-bitmap", "image"},
+		"pdf":      {"application/pdf", "document"},
+		"pfx":      {"application/x-pkcs12", "binary"},
+		"pgm":      {"image/x-portable-graymap", "image"},
+		"pl":       {"text/plain", "document"},
+		"png":      {"image/png", "image"},
+		"pnm":      {"image/x-portable-anymap", "image"},
+		"pot":      {"application/vnd.ms-powerpoint", "document"},
+		"ppa":      {"application/vnd.ms-powerpoint", "document"},
+		"ppm":      {"image/x-portable-pixmap", "image"},
+		"pps":      {"application/vnd.ms-powerpoint", "document"},
+		"ppt":      {"application/vnd.ms-powerpoint", "document"},
+		"ps":       {"application/postscript", "document"},
+		"pwz":      {"application/vnd.ms-powerpoint", "document"},
+		"py":       {"text/x-python", "document"},
+		"pyc":      {"application/x-python-code", "binary"},
+		"pyo":      {"application/x-python-code", "binary"},
+		"qt":       {"video/quicktime", "video"},
+		"ra":       {"audio/x-pn-realaudio", "audio"},
+		"ram":      {"application/x-pn-realaudio", "audio"},
+		"ras":      {"image/x-cmu-raster", "image"},
+		"rdf":      {"application/xml", "binary"},
+		"rgb":      {"image/x-rgb", "image"},
+		"roff":     {"application/x-troff", "binary"},
+		"rtx":      {"text/richtext", "document"},
+		"sgm":      {"text/x-sgml", "document"},
+		"sgml":     {"text/x-sgml", "document"},
+		"sh":       {"application/x-sh", "document"},
+		"shar":     {"application/x-shar", "binary"},
+		"snd":      {"audio/basic", "audio"},
+		"so":       {"application/octet-stream", "binary"},
+		"src":      {"application/x-wais-source", "binary"},
+		"stl":      {"model/stl", "model"},
+		"sv4cpio":  {"application/x-sv4cpio", "binary"},
+		"sv4crc":   {"application/x-sv4crc", "binary"},
+		"svg":      {"image/svg+xml", "image"},
+		"swf":      {"application/x-shockwave-flash", "binary"},
+		"t":        {"application/x-troff", "binary"},
+		"tar":      {"application/x-tar", "binary"},
+		"tcl":      {"application/x-tcl", "binary"},
+		"tex":      {"application/x-tex", "binary"},
+		"texi":     {"application/x-texinfo", "binary"},
+		"texinfo":  {"application/x-texinfo", "binary"},
+		"tif":      {"image/tiff", "image"},
+		"tiff":     {"image/tiff", "image"},
+		"tr":       {"application/x-troff", "binary"},
+		"tsv":      {"text/tab-separated-values", "document"},
+		"txt":      {"text/plain", "document"},
+		"ustar":    {"application/x-ustar", "binary"},
+		"vcf":      {"text/x-vcard", "document"},
+		"wav":      {"audio/x-wav", "audio"},
+		"webm":     {"video/webm", "video"},
+		"wiz":      {"application/msword", "document"},
+		"wsdl":     {"application/xml", "document"},
+		"xbm":      {"image/x-xbitmap", "image"},
+		"xlb":      {"application/vnd.ms-excel", "document"},
+		"xls":      {"application/vnd.ms-excel", "document"},
+		"xml":      {"text/xml", "document"},
+		"xpdl":     {"application/xml", "document"},
+		"xpm":      {"image/x-xpixmap", "image"},
+		"xsl":      {"application/xml", "document"},
+		"xwd":      {"image/x-xwindowdump", "image"},
+		"zip":      {"application/zip", "binary"},
+
+		// These are non-standard types, commonly found in the wild.
+		"cbr":  {"application/vnd.comicbook-rar", "document"},
+		"cbz":  {"application/vnd.comicbook+zip", "document"},
+		"flac": {"audio/flac", "audio"},
+		"lbry": {"application/x-ext-lbry", "document"},
+		"m4v":  {"video/m4v", "video"},
+		"mid":  {"audio/midi", "audio"},
+		"midi": {"audio/midi", "audio"},
+		"mkv":  {"video/x-matroska", "video"},
+		"mobi": {"application/x-mobipocket-ebook", "document"},
+		"oga":  {"audio/ogg", "audio"},
+		"ogv":  {"video/ogg", "video"},
+		"pct":  {"image/pict", "image"},
+		"pic":  {"image/pict", "image"},
+		"pict": {"image/pict", "image"},
+		"prc":  {"application/x-mobipocket-ebook", "document"},
+		"rtf":  {"application/rtf", "document"},
+		"xul":  {"text/xul", "document"},
+
+		// microsoft is special and has its own "standard"
+		// https://docs.microsoft.com/en-us/windows/desktop/wmp/file-name-extensions
+		"wmv": {"video/x-ms-wmv", "video"},
+	}
+
+	if data, ok := types[ext]; ok {
+		return data.mime, data.t
+	}
+	return "application/x-ext-" + ext, "binary"
+}

publish/publish.go

@@ -0,0 +1,291 @@
+package publish
+
+import (
+	"bytes"
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"sort"
+
+	"github.com/lbryio/reflector.go/reflector"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/lbrycrd"
+	"github.com/lbryio/lbry.go/v2/stream"
+	pb "github.com/lbryio/types/v2/go"
+
+	"github.com/btcsuite/btcd/btcjson"
+	"github.com/btcsuite/btcd/chaincfg/chainhash"
+	"github.com/btcsuite/btcd/txscript"
+	"github.com/btcsuite/btcd/wire"
+	"github.com/btcsuite/btcutil"
+	"github.com/golang/protobuf/proto"
+)
+
+/* TODO:
+import cert from wallet
+get all utxos from chainquery
+create transaction
+sign it with the channel
+track state of utxos across publishes from this channel so that we can just do one query to get utxos
+prioritize only confirmed utxos
+
+Handling all the issues we handle currently with lbrynet:
+	"Couldn't find private key for id",
+	"You already have a stream claim published under the name",
+	"Cannot publish using channel",
+	"txn-mempool-conflict",
+	"too-long-mempool-chain",
+	"Missing inputs",
+	"Not enough funds to cover this transaction",
+*/
+
+type Details struct {
+	Title       string
+	Description string
+	Author      string
+	Tags        []string
+	ReleaseTime int64
+}
+
+func Publish(client *lbrycrd.Client, path, name, address string, details Details, reflectorAddress string) (*wire.MsgTx, *chainhash.Hash, error) {
+	if name == "" {
+		return nil, nil, errors.Err("name required")
+	}
+
+	//TODO: sign claim if publishing into channel
+
+	addr, err := btcutil.DecodeAddress(address, &lbrycrd.MainNetParams)
+	if errors.Is(err, btcutil.ErrUnknownAddressType) {
+		return nil, nil, errors.Err(`unknown address type. here's what you need to make this work:
+- deprecatedrpc=validateaddress" and "deprecatedrpc=signrawtransaction" in your lbrycrd.conf
+- github.com/btcsuite/btcd pinned to hash 306aecffea32
+- github.com/btcsuite/btcutil pinned to 4c204d697803
+- github.com/lbryio/lbry.go/v2 (make sure you have v2 at the end)`)
+	}
+	if err != nil {
+		return nil, nil, err
+	}
+
+	amount := 0.01
+	changeAddr := addr // TODO: fix this? or maybe its fine?
+	tx, err := baseTx(client, amount, changeAddr)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	st, stPB, err := makeStream(path)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	stPB.Author = details.Author
+	stPB.ReleaseTime = details.ReleaseTime
+
+	claim := &pb.Claim{
+		Title:       details.Title,
+		Description: details.Description,
+		Type:        &pb.Claim_Stream{Stream: stPB},
+	}
+
+	err = addClaimToTx(tx, claim, name, amount, addr)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// sign and send
+	signedTx, allInputsSigned, err := client.SignRawTransaction(tx)
+	if err != nil {
+		return nil, nil, err
+	}
+	if !allInputsSigned {
+		return nil, nil, errors.Err("not all inputs for the tx could be signed")
+	}
+
+	err = reflect(st, reflectorAddress)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	txid, err := client.SendRawTransaction(signedTx, false)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return signedTx, txid, nil
+}
+
+// TODO: lots of assumptions. hardcoded values need to be passed in or calculated
+func baseTx(client *lbrycrd.Client, amount float64, changeAddress btcutil.Address) (*wire.MsgTx, error) {
+	txFee := 0.0002 // TODO: estimate this better?
+
+	inputs, total, err := coinChooser(client, amount+txFee)
+	if err != nil {
+		return nil, err
+	}
+
+	change := total - amount - txFee
+
+	// create base raw tx
+	addresses := make(map[btcutil.Address]btcutil.Amount)
+	//changeAddr, err := client.GetNewAddress("")
+	changeAmount, err := btcutil.NewAmount(change)
+	if err != nil {
+		return nil, err
+	}
+	addresses[changeAddress] = changeAmount
+	lockTime := int64(0)
+	return client.CreateRawTransaction(inputs, addresses, &lockTime)
+}
+
+func coinChooser(client *lbrycrd.Client, amount float64) ([]btcjson.TransactionInput, float64, error) {
+	utxos, err := client.ListUnspentMin(1)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	sort.Slice(utxos, func(i, j int) bool { return utxos[i].Amount < utxos[j].Amount })
+
+	var utxo btcjson.ListUnspentResult
+	for _, u := range utxos {
+		if u.Spendable && u.Amount >= amount {
+			utxo = u
+			break
+		}
+	}
+	if utxo.TxID == "" {
+		return nil, 0, errors.Err("not enough utxos to create tx")
+	}
+
+	return []btcjson.TransactionInput{{Txid: utxo.TxID, Vout: utxo.Vout}}, utxo.Amount, nil
+}
+
+func addClaimToTx(tx *wire.MsgTx, claim *pb.Claim, name string, amount float64, claimAddress btcutil.Address) error {
+	claimBytes, err := proto.Marshal(claim)
+	if err != nil {
+		return err
+	}
+	claimBytes = append([]byte{0}, claimBytes...) // version 0 = no channel sig
+
+	amt, err := btcutil.NewAmount(amount)
+	if err != nil {
+		return err
+	}
+
+	script, err := getClaimPayoutScript(name, claimBytes, claimAddress)
+	if err != nil {
+		return err
+	}
+
+	tx.AddTxOut(wire.NewTxOut(int64(amt), script))
+	return nil
+}
+
+func Decode(client *lbrycrd.Client, tx *wire.MsgTx) (string, error) {
+	buf := bytes.NewBuffer(make([]byte, 0, tx.SerializeSize()))
+	if err := tx.Serialize(buf); err != nil {
+		return "", errors.Err(err)
+	}
+	//txHex := hex.EncodeToString(buf.Bytes())
+	//spew.Dump(txHex)
+	decoded, err := client.DecodeRawTransaction(buf.Bytes())
+	if err != nil {
+		return "", err
+	}
+
+	data, err := json.MarshalIndent(decoded, "", "  ")
+	return string(data), err
+}
+
+func reflect(st stream.Stream, reflectorAddress string) error {
+	// upload blobs to reflector
+	c := reflector.Client{}
+	err := c.Connect(reflectorAddress)
+	if err != nil {
+		return errors.Err(err)
+	}
+	for i, b := range st {
+		if i == 0 {
+			err = c.SendSDBlob(b)
+		} else {
+			err = c.SendBlob(b)
+		}
+		if err != nil {
+			return errors.Err(err)
+		}
+	}
+	return nil
+}
+
+func makeStream(path string) (stream.Stream, *pb.Stream, error) {
+	file, err := os.Open(path)
+	if err != nil {
+		return nil, nil, errors.Err(err)
+	}
+	defer func() { _ = file.Close() }()
+	enc := stream.NewEncoder(file)
+
+	s, err := enc.Stream()
+	if err != nil {
+		return nil, nil, errors.Err(err)
+	}
+
+	streamProto := &pb.Stream{
+		Source: &pb.Source{
+			SdHash: enc.SDBlob().Hash(),
+			Name:   filepath.Base(file.Name()),
+			Size:   uint64(enc.SourceLen()),
+			Hash:   enc.SourceHash(),
+		},
+	}
+
+	mimeType, category := guessMimeType(filepath.Ext(file.Name()))
+	streamProto.Source.MediaType = mimeType
+
+	switch category {
+	case "video":
+		//t, err := streamVideoMetadata(path)
+		//if err != nil {
+		//	return nil, nil, err
+		//}
+		streamProto.Type = &pb.Stream_Video{}
+	case "audio":
+		streamProto.Type = &pb.Stream_Audio{}
+	case "image":
+		streamProto.Type = &pb.Stream_Image{}
+	}
+
+	return s, streamProto, nil
+}
+
+func getClaimPayoutScript(name string, value []byte, address btcutil.Address) ([]byte, error) {
+	//OP_CLAIM_NAME <name> <value> OP_2DROP OP_DROP OP_DUP OP_HASH160 <address> OP_EQUALVERIFY OP_CHECKSIG
+
+	pkscript, err := txscript.PayToAddrScript(address)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+
+	return txscript.NewScriptBuilder().
+		AddOp(txscript.OP_NOP6).  //OP_CLAIM_NAME
+		AddData([]byte(name)).    //<name>
+		AddData(value).           //<value>
+		AddOp(txscript.OP_2DROP). //OP_2DROP
+		AddOp(txscript.OP_DROP).  //OP_DROP
+		AddOps(pkscript).         //OP_DUP OP_HASH160 <address> OP_EQUALVERIFY OP_CHECKSIG
+		Script()
+}
+
+//func streamVideoMetadata(path string) (*pb.Stream_Video, error) {
+//	mi, err := mediainfo.GetMediaInfo(path)
+//	if err != nil {
+//		return nil, err
+//	}
+//	return &pb.Stream_Video{
+//		Video: &pb.Video{
+//			Duration: uint32(mi.General.Duration / 1000),
+//			Height:   uint32(mi.Video.Height),
+//			Width:    uint32(mi.Video.Width),
+//		},
+//	}, nil
+//}

publish/wallet.go

@@ -0,0 +1,59 @@
+package publish
+
+import (
+	"encoding/json"
+	"io"
+)
+
+func LoadWallet(r io.Reader) (WalletFile, error) {
+	var w WalletFile
+	err := json.NewDecoder(r).Decode(&w)
+	return w, err
+}
+
+type WalletFile struct {
+	Name        string      `json:"name"`
+	Version     int         `json:"version"`
+	Preferences WalletPrefs `json:"preferences"`
+	Accounts    []Account   `json:"accounts"`
+}
+
+type Account struct {
+	AddressGenerator AddressGenerator  `json:"address_generator"`
+	Certificates     map[string]string `json:"certificates"`
+	Encrypted        bool              `json:"encrypted"`
+	Ledger           string            `json:"ledger"`
+	ModifiedOn       float64           `json:"modified_on"`
+	Name             string            `json:"name"`
+	PrivateKey       string            `json:"private_key"`
+	PublicKey        string            `json:"public_key"`
+	Seed             string            `json:"seed"`
+}
+
+type AddressGenerator struct {
+	Name      string           `json:"name"`
+	Change    AddressGenParams `json:"change"` // should "change" and "receiving" be replaced with a map[string]AddressGenParams?
+	Receiving AddressGenParams `json:"receiving"`
+}
+
+type AddressGenParams struct {
+	Gap                   int `json:"gap"`
+	MaximumUsesPerAddress int `json:"maximum_uses_per_address"`
+}
+
+type WalletPrefs struct {
+	Shared struct {
+		Ts    float64 `json:"ts"`
+		Value struct {
+			Type  string `json:"type"`
+			Value struct {
+				AppWelcomeVersion int           `json:"app_welcome_version"`
+				Blocked           []interface{} `json:"blocked"`
+				Sharing3P         bool          `json:"sharing_3P"`
+				Subscriptions     []string      `json:"subscriptions"`
+				Tags              []string      `json:"tags"`
+			} `json:"value"`
+			Version string `json:"version"`
+		} `json:"value"`
+	} `json:"shared"`
+}

readme.md

@@ -1,25 +1,110 @@
 # Reflector
 
-A reflector cluster to accept LBRY content for hosting en masse, rehost the content, and make money on data fees (TODO). 
-This code includes Go implementations of the LBRY peer protocol, reflector protocol, and DHT.
+Reflector is a central piece of software that providers LBRY with the following features:
+- Blobs reflection: when something is published, we capture the data and store it on our servers for quicker retrieval
+- Blobs distribution: when a piece of content is requested and the LBRY network doesn't have it, reflector will retrieve it from its storage and distribute it
+- Blobs caching: reflectors can be chained together in multiple regions or servers to form a chain of cached content. We call those "blobcaches". They are layered so that content distribution is favorable in all the regions we deploy it to
+
+There are a few other features embedded in reflector.go including publishing streams from Go, downloading or upload blobs, resolving content and more unfinished tools.
+
+This code includes a Go implementations of the LBRY peer protocol, reflector protocol, and DHT.
 
 ## Installation
 
-coming soon
+- Install mysql 8 (5.7 might work too)
+- add a reflector user and database with password `reflector` with localhost access only
+- Create the tables as described [here](https://github.com/lbryio/reflector.go/blob/master/db/db.go#L735) (the link might not update as the code does so just look for the schema in that file)
+
+#### We do not support running reflector.go as a blob receiver, however if you want to run it as a private blobcache you may compile it yourself and run it as following:
+```bash
+./prism-bin reflector \
+--conf="none" \
+--disable-uploads=true \
+--use-db=false \
+--upstream-reflector="reflector.lbry.com" \
+--upstream-protocol="http" \
+--request-queue-size=200 \
+--disk-cache="2GB:/path/to/your/storage/:localdb" \
+```
+
+Create a systemd script if you want to run it automatically on startup or as a service.
 
 ## Usage
 
-coming soon
+Usage as reflector/blobcache:
+```bash
+Run reflector server
 
+Usage:
+  prism reflector [flags]
+
+Flags:
+      --disable-blocklist                 Disable blocklist watching/updating
+      --disable-uploads                   Disable uploads to this reflector server
+      --disk-cache string                 Where to cache blobs on the file system. format is 'sizeGB:CACHE_PATH:cachemanager' (cachemanagers: localdb/lfuda/lru) (default "100GB:/tmp/downloaded_blobs:localdb")
+  -h, --help                              help for reflector
+      --http-peer-port int                The port reflector will distribute content from over HTTP protocol (default 5569)
+      --http3-peer-port int               The port reflector will distribute content from over HTTP3 protocol (default 5568)
+      --mem-cache int                     enable in-memory cache with a max size of this many blobs
+      --metrics-port int                  The port reflector will use for prometheus metrics (default 2112)
+      --optional-disk-cache string        Optional secondary file system cache for blobs. format is 'sizeGB:CACHE_PATH:cachemanager' (cachemanagers: localdb/lfuda/lru) (this would get hit before the one specified in disk-cache)
+      --origin-endpoint string            HTTP edge endpoint for standard HTTP retrieval
+      --origin-endpoint-fallback string   HTTP edge endpoint for standard HTTP retrieval if first origin fails
+      --receiver-port int                 The port reflector will receive content from (default 5566)
+      --request-queue-size int            How many concurrent requests from downstream should be handled at once (the rest will wait) (default 200)
+      --tcp-peer-port int                 The port reflector will distribute content from for the TCP (LBRY) protocol (default 5567)
+      --upstream-protocol string          protocol used to fetch blobs from another upstream reflector server (tcp/http3/http) (default "http")
+      --upstream-reflector string         host:port of a reflector server where blobs are fetched from
+      --use-db                            Whether to connect to the reflector db or not (default true)
+
+Global Flags:
+      --conf string       Path to config. Use 'none' to disable (default "config.json")
+  -v, --verbose strings   Verbose logging for specific components
+```
+
+Other uses:
+
+```bash
+Prism is a single entry point application with multiple sub modules which can be leveraged individually or together
+
+Usage:
+  prism [command]
+
+Available Commands:
+  check-integrity check blobs integrity for a given path
+  cluster         Start(join) to or Start a new cluster
+  decode          Decode a claim value
+  dht             Run dht node
+  getstream       Get a stream from a reflector server
+  help            Help about any command
+  peer            Run peer server
+  populate-db     populate local database with blobs from a disk storage
+  publish         Publish a file
+  reflector       Run reflector server
+  resolve         Resolve a URL
+  send            Send a file to a reflector
+  sendblob        Send a random blob to a reflector server
+  start           Runs full prism application with cluster, dht, peer server, and reflector server.
+  test            Test things
+  upload          Upload blobs to S3
+  version         Print the version
+
+Flags:
+      --conf string       Path to config. Use 'none' to disable (default "config.json")
+  -h, --help              help for prism
+  -v, --verbose strings   Verbose logging for specific components
+```
 ## Running from Source
 
-This project requires [Go v1.10](https://golang.org/doc/install) or higher.
+This project requires [Go v1.20](https://golang.org/doc/install).
+
+On Ubuntu you can install it with `sudo snap install go --classic`
 
 ```
-go get -u github.com/lbryio/reflector.go
-cd "$(go env GOPATH)/src/github.com/lbryio/reflector.go"
+git clone git@github.com:lbryio/reflector.go.git
+cd reflector.go
 make
-./bin/prism-bin
+./dist/linux_amd64/prism-bin
 ```
 
 ## Contributing
@@ -33,8 +118,7 @@ This project is MIT licensed.
 ## Security
 
 We take security seriously. Please contact security@lbry.com regarding any security issues.
-Our PGP key is [here](https://keybase.io/lbry/key.asc) if you need it.
+Our PGP key is [here](https://lbry.com/faq/pgp-key) if you need it.
 
 ## Contact
-
-The primary contact for this project is [@lyoshenka](https://github.com/lyoshenka) (grin@lbry.com)
+The primary contact for this project is [@Nikooo777](https://github.com/Nikooo777) (niko-at-lbry.com)

reflector/blocklist.go

@@ -8,42 +8,49 @@ import (
 	"strings"
 	"time"
 
+	"github.com/lbryio/reflector.go/internal/metrics"
 	"github.com/lbryio/reflector.go/store"
 	"github.com/lbryio/reflector.go/wallet"
 
-	"github.com/lbryio/lbry.go/extras/errors"
-	types1 "github.com/lbryio/types/v1/go"
-	types2 "github.com/lbryio/types/v2/go"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
 
-	"github.com/golang/protobuf/proto"
 	log "github.com/sirupsen/logrus"
 )
 
 const blocklistURL = "https://api.lbry.com/file/list_blocked"
 
 func (s *Server) enableBlocklist(b store.Blocklister) {
-	// TODO: updateBlocklist should be killed when server is shutting down
-	updateBlocklist(b)
+	walletServers := []string{
+		"spv25.lbry.com:50001",
+		"spv26.lbry.com:50001",
+		"spv19.lbry.com:50001",
+		"spv14.lbry.com:50001",
+	}
+
+	updateBlocklist(b, walletServers, s.grp.Ch())
 	t := time.NewTicker(12 * time.Hour)
 	for {
 		select {
 		case <-s.grp.Ch():
 			return
 		case <-t.C:
-			updateBlocklist(b)
+			updateBlocklist(b, walletServers, s.grp.Ch())
 		}
 	}
 }
 
-func updateBlocklist(b store.Blocklister) {
-	values, err := blockedSdHashes()
+func updateBlocklist(b store.Blocklister, walletServers []string, stopper stop.Chan) {
+	log.Debugf("blocklist update starting")
+	values, err := blockedSdHashes(walletServers, stopper)
 	if err != nil {
 		log.Error(err)
 		return
 	}
 
-	for _, v := range values {
+	for name, v := range values {
 		if v.Err != nil {
+			log.Error(errors.FullTrace(errors.Err("blocklist: %s: %s", name, v.Err)))
 			continue
 		}
 
@@ -52,17 +59,19 @@ func updateBlocklist(b store.Blocklister) {
 			log.Error(err)
 		}
 	}
+	log.Debugf("blocklist update done")
 }
 
-func blockedSdHashes() (map[string]valOrErr, error) {
-	resp, err := http.Get(blocklistURL)
+func blockedSdHashes(walletServers []string, stopper stop.Chan) (map[string]valOrErr, error) {
+	client := http.Client{Timeout: 1 * time.Second}
+	resp, err := client.Get(blocklistURL)
 	if err != nil {
 		return nil, errors.Err(err)
 	}
 	defer func() {
 		err := resp.Body.Close()
 		if err != nil {
-			log.Errorln(err)
+			log.Errorln(errors.Err(err))
 		}
 	}()
 
@@ -82,7 +91,7 @@ func blockedSdHashes() (map[string]valOrErr, error) {
 		return nil, errors.Prefix("list_blocked API call", r.Error)
 	}
 
-	return sdHashesForOutpoints(r.Data.Outpoints)
+	return sdHashesForOutpoints(walletServers, r.Data.Outpoints, stopper)
 }
 
 type valOrErr struct {
@@ -91,23 +100,34 @@ type valOrErr struct {
 }
 
 // sdHashesForOutpoints queries wallet server for the sd hashes in a given outpoints
-func sdHashesForOutpoints(outpoints []string) (map[string]valOrErr, error) {
+func sdHashesForOutpoints(walletServers, outpoints []string, stopper stop.Chan) (map[string]valOrErr, error) {
 	values := make(map[string]valOrErr)
 
 	node := wallet.NewNode()
-	defer node.Shutdown()
-	err := node.Connect([]string{
-		"spv1.lbry.com:50001",
-		"spv2.lbry.com:50001",
-		"spv3.lbry.com:50001",
-		"spv4.lbry.com:50001",
-		"spv5.lbry.com:50001",
-	}, nil)
+	err := node.Connect(walletServers, nil)
 	if err != nil {
-		return nil, err
+		return nil, errors.Err(err)
 	}
 
+	done := make(chan bool)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "sdhashesforoutput").Inc()
+	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "sdhashesforoutput").Dec()
+		select {
+		case <-done:
+		case <-stopper:
+		}
+		node.Shutdown()
+	}()
+
+OutpointLoop:
 	for _, outpoint := range outpoints {
+		select {
+		case <-stopper:
+			break OutpointLoop
+		default:
+		}
+
 		parts := strings.Split(outpoint, ":")
 		if len(parts) != 2 {
 			values[outpoint] = valOrErr{Err: errors.Err("invalid outpoint format")}
@@ -120,57 +140,20 @@ func sdHashesForOutpoints(outpoints []string) (map[string]valOrErr, error) {
 			continue
 		}
 
-		resp, err := node.GetClaimsInTx(parts[0])
+		claim, err := node.GetClaimInTx(parts[0], nout)
 		if err != nil {
 			values[outpoint] = valOrErr{Err: err}
 			continue
 		}
 
-		var value []byte
-		for _, tx := range resp.Result {
-			if tx.Nout != nout {
-				continue
+		hash := hex.EncodeToString(claim.GetStream().GetSource().GetSdHash())
+		values[outpoint] = valOrErr{Value: hash, Err: nil}
 	}
 
-			value, err = hex.DecodeString(tx.Value)
-			break
-		}
-		if err != nil {
-			values[outpoint] = valOrErr{Err: err}
-			continue
-		} else if value == nil {
-			values[outpoint] = valOrErr{Err: errors.Err("outpoint not found")}
-			continue
-		}
-
-		hash, err := hashFromClaim(value)
-		values[outpoint] = valOrErr{Value: hash, Err: err}
+	select {
+	case done <- true:
+	default: // in case of race where stopper got stopped right after loop finished
 	}
 
 	return values, nil
 }
-
-func hashFromClaim(value []byte) (string, error) {
-	claim := &types1.Claim{}
-	err := proto.Unmarshal(value, claim)
-	if err != nil {
-		return "", err
-	}
-
-	if claim.GetStream().GetSource().GetSourceType() == types1.Source_lbry_sd_hash && claim.GetStream().GetSource().GetSource() != nil {
-		return hex.EncodeToString(claim.GetStream().GetSource().GetSource()), nil
-	}
-
-	claim2 := &types2.Claim{}
-	err = proto.Unmarshal(value, claim2)
-	if err != nil {
-		return "", err
-	}
-
-	stream, ok := claim2.GetType().(*types2.Claim_Stream)
-	if !ok || stream == nil {
-		return "", errors.Err("not a stream claim")
-	}
-
-	return hex.EncodeToString(claim2.GetStream().GetSource().GetSdHash()), nil
-}

reflector/client.go

@@ -2,12 +2,11 @@ package reflector
 
 import (
 	"encoding/json"
+	"log"
 	"net"
 
-	"github.com/lbryio/lbry.go/extras/errors"
-	"github.com/lbryio/lbry.go/stream"
-
-	log "github.com/sirupsen/logrus"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
 )
 
 // ErrBlobExists is a default error for when a blob already exists on the reflector server.
@@ -36,8 +35,18 @@ func (c *Client) Close() error {
 	return c.conn.Close()
 }
 
-// SendBlob sends a send blob request to the client.
+// SendBlob sends a blob to the server.
 func (c *Client) SendBlob(blob stream.Blob) error {
+	return c.sendBlob(blob, false)
+}
+
+// SendSDBlob sends an SD blob request to the server.
+func (c *Client) SendSDBlob(blob stream.Blob) error {
+	return c.sendBlob(blob, true)
+}
+
+// sendBlob does the actual blob sending
+func (c *Client) sendBlob(blob stream.Blob, isSDBlob bool) error {
 	if !c.connected {
 		return errors.Err("not connected")
 	}
@@ -47,10 +56,15 @@ func (c *Client) SendBlob(blob stream.Blob) error {
 	}
 
 	blobHash := blob.HashHex()
-	sendRequest, err := json.Marshal(sendBlobRequest{
-		BlobSize: blob.Size(),
-		BlobHash: blobHash,
-	})
+	var req sendBlobRequest
+	if isSDBlob {
+		req.SdBlobSize = blob.Size()
+		req.SdBlobHash = blobHash
+	} else {
+		req.BlobSize = blob.Size()
+		req.BlobHash = blobHash
+	}
+	sendRequest, err := json.Marshal(req)
 	if err != nil {
 		return err
 	}
@@ -62,31 +76,52 @@ func (c *Client) SendBlob(blob stream.Blob) error {
 
 	dec := json.NewDecoder(c.conn)
 
+	if isSDBlob {
+		var sendResp sendSdBlobResponse
+		err = dec.Decode(&sendResp)
+		if err != nil {
+			return err
+		}
+		if !sendResp.SendSdBlob {
+			return errors.Prefix(blobHash[:8], ErrBlobExists)
+		}
+		log.Println("Sending SD blob " + blobHash[:8])
+	} else {
 		var sendResp sendBlobResponse
 		err = dec.Decode(&sendResp)
 		if err != nil {
 			return err
 		}
-
 		if !sendResp.SendBlob {
 			return errors.Prefix(blobHash[:8], ErrBlobExists)
 		}
-
 		log.Println("Sending blob " + blobHash[:8])
+	}
 
 	_, err = c.conn.Write(blob)
 	if err != nil {
 		return err
 	}
+
+	if isSDBlob {
+		var transferResp sdBlobTransferResponse
+		err = dec.Decode(&transferResp)
+		if err != nil {
+			return err
+		}
+		if !transferResp.ReceivedSdBlob {
+			return errors.Err("server did not received SD blob")
+		}
+	} else {
 		var transferResp blobTransferResponse
 		err = dec.Decode(&transferResp)
 		if err != nil {
 			return err
 		}
-
 		if !transferResp.ReceivedBlob {
 			return errors.Err("server did not received blob")
 		}
+	}
 
 	return nil
 }

reflector/protected_content.go

@@ -0,0 +1,81 @@
+package reflector
+
+import (
+	"encoding/json"
+	"net/http"
+	"time"
+
+	"github.com/bluele/gcache"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"golang.org/x/sync/singleflight"
+)
+
+const protectedListURL = "https://api.odysee.com/file/list_protected"
+
+type ProtectedContent struct {
+	SDHash  string `json:"sd_hash"`
+	ClaimID string `json:"claim_id"`
+}
+
+var protectedCache = gcache.New(10).Expiration(2 * time.Minute).Build()
+
+func GetProtectedContent() (interface{}, error) {
+	cachedVal, err := protectedCache.Get("protected")
+	if err == nil && cachedVal != nil {
+		return cachedVal.(map[string]bool), nil
+	}
+
+	method := "GET"
+	var r struct {
+		Success bool               `json:"success"`
+		Error   string             `json:"error"`
+		Data    []ProtectedContent `json:"data"`
+	}
+
+	client := &http.Client{}
+	req, err := http.NewRequest(method, protectedListURL, nil)
+
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+	res, err := client.Do(req)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+	defer func() { _ = res.Body.Close() }()
+	if res.StatusCode != http.StatusOK {
+		return nil, errors.Err("unexpected status code %d", res.StatusCode)
+	}
+	if err = json.NewDecoder(res.Body).Decode(&r); err != nil {
+		return nil, errors.Err(err)
+	}
+
+	if !r.Success {
+		return nil, errors.Prefix("file/list_protected API call", r.Error)
+	}
+
+	protectedMap := make(map[string]bool, len(r.Data))
+	for _, pc := range r.Data {
+		protectedMap[pc.SDHash] = true
+	}
+	err = protectedCache.Set("protected", protectedMap)
+	if err != nil {
+		return protectedMap, errors.Err(err)
+	}
+	return protectedMap, nil
+}
+
+var sf = singleflight.Group{}
+
+func IsProtected(sdHash string) bool {
+	val, err, _ := sf.Do("protected", GetProtectedContent)
+	if err != nil {
+		return false
+	}
+	cachedMap, ok := val.(map[string]bool)
+	if !ok {
+		return false
+	}
+
+	return cachedMap[sdHash]
+}

reflector/server.go

@@ -6,16 +6,15 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"io"
-	"io/ioutil"
 	"net"
-	"strconv"
 	"time"
 
+	"github.com/lbryio/reflector.go/internal/metrics"
 	"github.com/lbryio/reflector.go/store"
 
-	"github.com/lbryio/lbry.go/extras/errors"
-	"github.com/lbryio/lbry.go/extras/stop"
-	"github.com/lbryio/lbry.go/stream"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+	"github.com/lbryio/lbry.go/v2/stream"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -32,25 +31,25 @@ const (
 	maxBlobSize      = stream.MaxBlobSize
 )
 
+var ErrBlobTooBig = errors.Base("blob must be at most %d bytes", maxBlobSize)
+
 // Server is and instance of the reflector server. It houses the blob store and listener.
 type Server struct {
 	Timeout time.Duration // timeout to read or write next message
 
-	StatLogger          *log.Logger   // logger to log stats
-	StatReportFrequency time.Duration // how often to log stats
-
 	EnableBlocklist bool // if true, blocklist checking and blob deletion will be enabled
 
-	store store.BlobStore
+	underlyingStore store.BlobStore
+	outerStore      store.BlobStore
 	grp             *stop.Group
-	stats *Stats
 }
 
 // NewServer returns an initialized reflector server pointer.
-func NewServer(store store.BlobStore) *Server {
+func NewServer(underlying store.BlobStore, outer store.BlobStore) *Server {
 	return &Server{
 		Timeout:         DefaultTimeout,
-		store:   store,
+		underlyingStore: underlying,
+		outerStore:      outer,
 		grp:             stop.New(),
 	}
 }
@@ -58,7 +57,6 @@ func NewServer(store store.BlobStore) *Server {
 // Shutdown shuts down the reflector server gracefully.
 func (s *Server) Shutdown() {
 	log.Println("shutting down reflector server...")
-	s.stats.Shutdown()
 	s.grp.StopAndWait()
 	log.Println("reflector server stopped")
 }
@@ -70,9 +68,10 @@ func (s *Server) Start(address string) error {
 		return errors.Err(err)
 	}
 	log.Println("reflector listening on " + address)
-
 	s.grp.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "listener").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "listener").Dec()
 		<-s.grp.Ch()
 		err := l.Close()
 		if err != nil {
@@ -82,20 +81,19 @@ func (s *Server) Start(address string) error {
 	}()
 
 	s.grp.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "start").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "start").Dec()
 		s.listenAndServe(l)
 		s.grp.Done()
 	}()
 
-	s.stats = NewStatLogger("UPLOAD", s.StatLogger, s.StatReportFrequency, s.grp.Child())
-	if s.StatLogger != nil && s.StatReportFrequency > 0 {
-		s.stats.Start()
-	}
-
 	if s.EnableBlocklist {
-		if b, ok := s.store.(store.Blocklister); ok {
+		if b, ok := s.underlyingStore.(store.Blocklister); ok {
 			s.grp.Add(1)
+			metrics.RoutinesQueue.WithLabelValues("reflector", "enableblocklist").Inc()
 			go func() {
+				defer metrics.RoutinesQueue.WithLabelValues("reflector", "enableblocklist").Dec()
 				s.enableBlocklist(b)
 				s.grp.Done()
 			}()
@@ -118,7 +116,9 @@ func (s *Server) listenAndServe(listener net.Listener) {
 			log.Error(err)
 		} else {
 			s.grp.Add(1)
+			metrics.RoutinesQueue.WithLabelValues("reflector", "server-listenandserve").Inc()
 			go func() {
+				defer metrics.RoutinesQueue.WithLabelValues("reflector", "server-listenandserve").Dec()
 				s.handleConn(conn)
 				s.grp.Done()
 			}()
@@ -133,7 +133,9 @@ func (s *Server) handleConn(conn net.Conn) {
 		close(connNeedsClosing)
 	}()
 	s.grp.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "server-handleconn").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "server-handleconn").Dec()
 		defer s.grp.Done()
 		select {
 		case <-connNeedsClosing:
@@ -173,7 +175,10 @@ func (s *Server) handleConn(conn net.Conn) {
 }
 
 func (s *Server) doError(conn net.Conn, err error) error {
-	shouldLog := s.stats.AddError(err)
+	if err == nil {
+		return nil
+	}
+	shouldLog := metrics.TrackError(metrics.DirectionUpload, err)
 	if shouldLog {
 		log.Errorln(errors.FullTrace(err))
 	}
@@ -195,13 +200,13 @@ func (s *Server) receiveBlob(conn net.Conn) error {
 	}
 
 	var wantsBlob bool
-	if bl, ok := s.store.(store.Blocklister); ok {
+	if bl, ok := s.underlyingStore.(store.Blocklister); ok {
 		wantsBlob, err = bl.Wants(blobHash)
 		if err != nil {
 			return err
 		}
 	} else {
-		blobExists, err := s.store.Has(blobHash)
+		blobExists, err := s.underlyingStore.Has(blobHash)
 		if err != nil {
 			return err
 		}
@@ -211,7 +216,7 @@ func (s *Server) receiveBlob(conn net.Conn) error {
 	var neededBlobs []string
 
 	if isSdBlob && !wantsBlob {
-		if nbc, ok := s.store.(neededBlobChecker); ok {
+		if nbc, ok := s.underlyingStore.(neededBlobChecker); ok {
 			neededBlobs, err = nbc.MissingBlobsForKnownStream(blobHash)
 			if err != nil {
 				return err
@@ -254,17 +259,17 @@ func (s *Server) receiveBlob(conn net.Conn) error {
 	log.Debugln("Got blob " + blobHash[:8])
 
 	if isSdBlob {
-		err = s.store.PutSD(blobHash, blob)
+		err = s.outerStore.PutSD(blobHash, blob)
 	} else {
-		err = s.store.Put(blobHash, blob)
+		err = s.outerStore.Put(blobHash, blob)
 	}
 	if err != nil {
 		return err
 	}
-
-	s.stats.AddBlob()
+	metrics.MtrInBytesReflector.Add(float64(len(blob)))
+	metrics.BlobUploadCount.Inc()
 	if isSdBlob {
-		s.stats.AddStream()
+		metrics.SDBlobUploadCount.Inc()
 	}
 	return s.sendTransferResponse(conn, true, isSdBlob)
 }
@@ -311,7 +316,7 @@ func (s *Server) readBlobRequest(conn net.Conn) (int, string, bool, error) {
 		return blobSize, blobHash, isSdBlob, errors.Err("blob hash is empty")
 	}
 	if blobSize > maxBlobSize {
-		return blobSize, blobHash, isSdBlob, errors.Err("blob must be at most " + strconv.Itoa(maxBlobSize) + " bytes")
+		return blobSize, blobHash, isSdBlob, errors.Err(ErrBlobTooBig)
 	}
 	if blobSize == 0 {
 		return blobSize, blobHash, isSdBlob, errors.Err("0-byte blob received")
@@ -361,7 +366,7 @@ func (s *Server) read(conn net.Conn, v interface{}) error {
 	dec := json.NewDecoder(conn)
 	err = dec.Decode(v)
 	if err != nil {
-		data, _ := ioutil.ReadAll(dec.Buffered())
+		data, _ := io.ReadAll(dec.Buffered())
 		if len(data) > 0 {
 			return errors.Err("%s. Data: %s", err.Error(), hex.EncodeToString(data))
 		}

reflector/server_test.go

@@ -9,9 +9,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/lbryio/lbry.go/dht/bits"
 	"github.com/lbryio/reflector.go/store"
 
+	"github.com/lbryio/lbry.go/v2/dht/bits"
+
 	"github.com/davecgh/go-spew/spew"
 	"github.com/phayes/freeport"
 )
@@ -22,7 +23,7 @@ func startServerOnRandomPort(t *testing.T) (*Server, int) {
 		t.Fatal(err)
 	}
 
-	srv := NewServer(&store.MemoryBlobStore{})
+	srv := NewServer(store.NewMemStore(), store.NewMemStore())
 	err = srv.Start("127.0.0.1:" + strconv.Itoa(port))
 	if err != nil {
 		t.Fatal(err)
@@ -119,7 +120,7 @@ func TestServer_Timeout(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	srv := NewServer(&store.MemoryBlobStore{})
+	srv := NewServer(store.NewMemStore(), store.NewMemStore())
 	srv.Timeout = testTimeout
 	err = srv.Start("127.0.0.1:" + strconv.Itoa(port))
 	if err != nil {
@@ -161,7 +162,7 @@ func TestServer_Timeout(t *testing.T) {
 //}
 
 type mockPartialStore struct {
-	store.MemoryBlobStore
+	*store.MemStore
 	missing []string
 }
 
@@ -181,7 +182,7 @@ func TestServer_PartialUpload(t *testing.T) {
 		missing[i] = bits.Rand().String()
 	}
 
-	st := store.BlobStore(&mockPartialStore{missing: missing})
+	st := store.BlobStore(&mockPartialStore{MemStore: store.NewMemStore(), missing: missing})
 	if _, ok := st.(neededBlobChecker); !ok {
 		t.Fatal("mock does not implement the relevant interface")
 	}
@@ -190,7 +191,7 @@ func TestServer_PartialUpload(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	srv := NewServer(st)
+	srv := NewServer(st, st)
 	err = srv.Start("127.0.0.1:" + strconv.Itoa(port))
 	if err != nil {
 		t.Fatal(err)

reflector/stats.go

@@ -1,122 +0,0 @@
-package reflector
-
-import (
-	"fmt"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/lbryio/lbry.go/extras/errors"
-	"github.com/lbryio/lbry.go/extras/stop"
-
-	log "github.com/sirupsen/logrus"
-)
-
-// TODO: store daily stats too. and maybe other intervals
-
-type Stats struct {
-	mu      *sync.Mutex
-	blobs   int
-	streams int
-	errors  map[string]int
-	started bool
-
-	name    string
-	logger  *log.Logger
-	logFreq time.Duration
-	grp     *stop.Group
-}
-
-func NewStatLogger(name string, logger *log.Logger, logFreq time.Duration, parentGrp *stop.Group) *Stats {
-	return &Stats{
-		mu:      &sync.Mutex{},
-		grp:     stop.New(parentGrp),
-		logger:  logger,
-		logFreq: logFreq,
-		errors:  make(map[string]int),
-		name:    name,
-	}
-}
-
-func (s *Stats) Start() {
-	s.started = true
-	s.grp.Add(1)
-	go func() {
-		defer s.grp.Done()
-		s.runSlackLogger()
-	}()
-}
-
-func (s *Stats) Shutdown() {
-	if !s.started {
-		return
-	}
-	s.log()
-	s.grp.StopAndWait()
-	s.started = false
-}
-
-func (s *Stats) AddBlob() {
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	s.blobs++
-}
-func (s *Stats) AddStream() {
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	s.streams++
-}
-
-func (s *Stats) AddError(e error) (shouldLog bool) { // shouldLog is a hack, but whatever
-	if e == nil {
-		return
-	}
-	err := errors.Wrap(e, 0)
-	name := err.TypeName()
-	if strings.Contains(err.Error(), "i/o timeout") { // hit a read or write deadline
-		name = "i/o timeout"
-	} else if strings.Contains(err.Error(), "read: connection reset by peer") { // the other side closed the connection using TCP reset
-		name = "read conn reset"
-	} else if strings.Contains(err.Error(), "unexpected EOF") { // tried to read from closed pipe or socket
-		name = "unexpected EOF"
-	} else if strings.Contains(err.Error(), "write: broken pipe") { // tried to write to a pipe or socket that was closed by the peer
-		name = "write broken pipe"
-	} else {
-		shouldLog = true
-	}
-
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	s.errors[name]++
-	return
-}
-
-func (s *Stats) runSlackLogger() {
-	t := time.NewTicker(s.logFreq)
-	for {
-		select {
-		case <-s.grp.Ch():
-			return
-		case <-t.C:
-			s.log()
-		}
-	}
-}
-
-func (s *Stats) log() {
-	s.mu.Lock()
-	blobs, streams := s.blobs, s.streams
-	s.blobs, s.streams = 0, 0
-	errStr := ""
-	for name, count := range s.errors {
-		errStr += fmt.Sprintf("%d %s, ", count, name)
-		delete(s.errors, name)
-	}
-	s.mu.Unlock()
-
-	if len(errStr) > 2 {
-		errStr = errStr[:len(errStr)-2] // trim last comma and space
-	}
-
-	s.logger.Printf("%s stats: %d blobs, %d streams, errors: %s", s.name, blobs, streams, errStr)
-}

reflector/uploader.go

@@ -1,17 +1,17 @@
 package reflector
 
 import (
-	"io/ioutil"
 	"os"
 	"path"
 	"sync"
 	"time"
 
 	"github.com/lbryio/reflector.go/db"
+	"github.com/lbryio/reflector.go/internal/metrics"
 	"github.com/lbryio/reflector.go/store"
 
-	"github.com/lbryio/lbry.go/extras/errors"
-	"github.com/lbryio/lbry.go/extras/stop"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -30,21 +30,23 @@ type Summary struct {
 
 type Uploader struct {
 	db                     *db.SQL
-	store           *store.DBBackedS3Store // could just be store.BlobStore interface
+	store                  *store.DBBackedStore // could just be store.BlobStore interface
 	workers                int
 	skipExistsCheck        bool
+	deleteBlobsAfterUpload bool
 	stopper                *stop.Group
 	countChan              chan increment
 
 	count Summary
 }
 
-func NewUploader(db *db.SQL, store *store.DBBackedS3Store, workers int, skipExistsCheck bool) *Uploader {
+func NewUploader(db *db.SQL, store *store.DBBackedStore, workers int, skipExistsCheck, deleteBlobsAfterUpload bool) *Uploader {
 	return &Uploader{
 		db:                     db,
 		store:                  store,
 		workers:                workers,
 		skipExistsCheck:        skipExistsCheck,
+		deleteBlobsAfterUpload: deleteBlobsAfterUpload,
 		stopper:                stop.New(),
 		countChan:              make(chan increment),
 	}
@@ -68,25 +70,27 @@ func (u *Uploader) Upload(dirOrFilePath string) error {
 		hashes[i] = path.Base(p)
 	}
 
-	log.Infoln("checking for existing blobs")
+	log.Debug("checking for existing blobs")
 
 	var exists map[string]bool
 	if !u.skipExistsCheck {
-		exists, err = u.db.HasBlobs(hashes)
+		exists, err = u.db.HasBlobs(hashes, false)
 		if err != nil {
 			return err
 		}
 		u.count.AlreadyStored = len(exists)
 	}
 
-	log.Infof("%d new blobs to upload", u.count.Total-u.count.AlreadyStored)
+	log.Debugf("%d new blobs to upload", u.count.Total-u.count.AlreadyStored)
 
 	workerWG := sync.WaitGroup{}
 	pathChan := make(chan string)
 
 	for i := 0; i < u.workers; i++ {
 		workerWG.Add(1)
+		metrics.RoutinesQueue.WithLabelValues("reflector", "upload").Inc()
 		go func(i int) {
+			defer metrics.RoutinesQueue.WithLabelValues("reflector", "upload").Dec()
 			defer workerWG.Done()
 			defer func(i int) { log.Debugf("worker %d quitting", i) }(i)
 			u.worker(pathChan)
@@ -95,7 +99,9 @@ func (u *Uploader) Upload(dirOrFilePath string) error {
 
 	countWG := sync.WaitGroup{}
 	countWG.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "uploader").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "uploader").Dec()
 		defer countWG.Done()
 		u.counter()
 	}()
@@ -119,17 +125,14 @@ Upload:
 	countWG.Wait()
 	u.stopper.Stop()
 
-	log.Infoln("SUMMARY")
-	log.Infof("%d blobs total", u.count.Total)
-	log.Infof("%d blobs already stored", u.count.AlreadyStored)
-	log.Infof("%d SD blobs uploaded", u.count.Sd)
-	log.Infof("%d content blobs uploaded", u.count.Blob)
-	log.Infof("%d errors encountered", u.count.Err)
-
+	log.Debugf(
+		"upload stats: %d blobs total, %d already stored, %d SD blobs uploaded, %d content blobs uploaded, %d errors",
+		u.count.Total, u.count.AlreadyStored, u.count.Sd, u.count.Blob, u.count.Err,
+	)
 	return nil
 }
 
-// worker reads paths from a channel and uploads them
+// worker reads paths from a channel,  uploads them, and optionally deletes them
 func (u *Uploader) worker(pathChan chan string) {
 	for {
 		select {
@@ -143,6 +146,11 @@ func (u *Uploader) worker(pathChan chan string) {
 			err := u.uploadBlob(filepath)
 			if err != nil {
 				log.Errorln(err)
+			} else if u.deleteBlobsAfterUpload {
+				err = os.Remove(filepath)
+				if err != nil {
+					log.Errorln(errors.Prefix("deleting blob", err))
+				}
 			}
 		}
 	}
@@ -156,9 +164,9 @@ func (u *Uploader) uploadBlob(filepath string) (err error) {
 		}
 	}()
 
-	blob, err := ioutil.ReadFile(filepath)
+	blob, err := os.ReadFile(filepath)
 	if err != nil {
-		return err
+		return errors.Err(err)
 	}
 
 	hash := BlobHash(blob)
@@ -167,17 +175,17 @@ func (u *Uploader) uploadBlob(filepath string) (err error) {
 	}
 
 	if IsValidJSON(blob) {
-		log.Debugf("Uploading SD blob %s", hash)
+		log.Debugf("uploading SD blob %s", hash)
 		err := u.store.PutSD(hash, blob)
 		if err != nil {
-			return errors.Prefix("Uploading SD blob "+hash, err)
+			return errors.Prefix("uploading SD blob "+hash, err)
 		}
 		u.inc(sdInc)
 	} else {
-		log.Debugf("Uploading blob %s", hash)
+		log.Debugf("uploading blob %s", hash)
 		err = u.store.Put(hash, blob)
 		if err != nil {
-			return errors.Prefix("Uploading blob "+hash, err)
+			return errors.Prefix("uploading blob "+hash, err)
 		}
 		u.inc(blobInc)
 	}
@@ -208,7 +216,7 @@ func (u *Uploader) counter() {
 			}
 		}
 		if (u.count.Sd+u.count.Blob)%50 == 0 {
-			log.Infof("%d of %d done (%s elapsed, %.3fs per blob)", u.count.Sd+u.count.Blob, u.count.Total-u.count.AlreadyStored, time.Since(start).String(), time.Since(start).Seconds()/float64(u.count.Sd+u.count.Blob))
+			log.Debugf("%d of %d done (%s elapsed, %.3fs per blob)", u.count.Sd+u.count.Blob, u.count.Total-u.count.AlreadyStored, time.Since(start).String(), time.Since(start).Seconds()/float64(u.count.Sd+u.count.Blob))
 		}
 	}
 }

scripts/lint.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+err=0
+trap 'err=1' ERR
+# All the .go files, excluding auto generated folders
+GO_FILES=$(find . -iname '*.go' -type f)
+(
+	go install golang.org/x/tools/cmd/goimports@latest                   # Used in build script for generated files
+#	go install golang.org/x/lint/golint@latest                           # Linter
+	go install github.com/jgautheron/gocyclo@latest                      # Check against high complexity
+	go install github.com/mdempsky/unconvert@latest                      # Identifies unnecessary type conversions
+	go install github.com/kisielk/errcheck@latest                        # Checks for unhandled errors
+	go install honnef.co/go/tools/cmd/staticcheck@latest                 # all sorts of static analysis
+)
+
+# echo "Running unused..." && staticcheck $(go list ./...)
+# go vet is the official Go static analyzer
+echo "Running go vet..." && go vet $(go list ./...)
+# checks for unhandled errors
+echo "Running errcheck..." && errcheck $(go list ./...)
+# check for unnecessary conversions - ignore autogen code
+echo "Running unconvert..." && unconvert -v $(go list ./...)
+echo "Running gocyclo..." && gocyclo -ignore "_test" -avg -over 28 $GO_FILES
+#echo "Running golint..." && golint -set_exit_status $(go list ./...)
+test $err = 0 # Return non-zero if any command failed

server/http/routes.go

@@ -0,0 +1,105 @@
+package http
+
+import (
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/reflector"
+	"github.com/lbryio/reflector.go/shared"
+	"github.com/lbryio/reflector.go/store"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+
+	"github.com/gin-gonic/gin"
+	log "github.com/sirupsen/logrus"
+)
+
+func (s *Server) getBlob(c *gin.Context) {
+	waiter := &sync.WaitGroup{}
+	waiter.Add(1)
+	enqueue(&blobRequest{c: c, finished: waiter})
+	waiter.Wait()
+}
+
+func (s *Server) HandleGetBlob(c *gin.Context) {
+	defer func() {
+		if r := recover(); r != nil {
+			log.Errorf("Recovered from panic: %v", r)
+		}
+	}()
+	start := time.Now()
+	hash := c.Query("hash")
+	edgeToken := c.Query("edge_token")
+
+	if reflector.IsProtected(hash) && edgeToken != s.edgeToken {
+		_ = c.Error(errors.Err("requested blob is protected"))
+		c.String(http.StatusForbidden, "requested blob is protected")
+		return
+	}
+	if s.missesCache.Has(hash) {
+		serialized, err := shared.NewBlobTrace(time.Since(start), "http").Serialize()
+		c.Header("Via", serialized)
+		if err != nil {
+			_ = c.Error(errors.Err(err))
+			c.String(http.StatusInternalServerError, err.Error())
+			return
+		}
+		c.AbortWithStatus(http.StatusNotFound)
+		return
+	}
+	blob, trace, err := s.store.Get(hash)
+	if err != nil {
+		serialized, serializeErr := trace.Serialize()
+		if serializeErr != nil {
+			_ = c.Error(errors.Prefix(serializeErr.Error(), err))
+			c.String(http.StatusInternalServerError, errors.Prefix(serializeErr.Error(), err).Error())
+			return
+		}
+		c.Header("Via", serialized)
+
+		if errors.Is(err, store.ErrBlobNotFound) {
+			_ = s.missesCache.Set(hash, true)
+			c.AbortWithStatus(http.StatusNotFound)
+			return
+		}
+		_ = c.Error(err)
+		c.String(http.StatusInternalServerError, err.Error())
+		return
+	}
+	serialized, err := trace.Serialize()
+	if err != nil {
+		_ = c.Error(err)
+		c.String(http.StatusInternalServerError, err.Error())
+		return
+	}
+	metrics.MtrOutBytesHttp.Add(float64(len(blob)))
+	metrics.BlobDownloadCount.Inc()
+	metrics.HttpDownloadCount.Inc()
+	c.Header("Via", serialized)
+	c.Header("Content-Disposition", "filename="+hash)
+	c.Data(http.StatusOK, "application/octet-stream", blob)
+}
+
+func (s *Server) hasBlob(c *gin.Context) {
+	hash := c.Query("hash")
+	has, err := s.store.Has(hash)
+	if err != nil {
+		_ = c.Error(err)
+		c.String(http.StatusInternalServerError, err.Error())
+		return
+	}
+	if has {
+		c.Status(http.StatusNoContent)
+		return
+	}
+	c.Status(http.StatusNotFound)
+}
+
+func (s *Server) recoveryHandler(c *gin.Context, err interface{}) {
+	c.JSON(500, gin.H{
+		"title": "Error",
+		"err":   err,
+	})
+}

server/http/server.go

@@ -0,0 +1,82 @@
+package http
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/lbryio/reflector.go/store"
+
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+
+	"github.com/bluele/gcache"
+	nice "github.com/ekyoung/gin-nice-recovery"
+	"github.com/gin-gonic/gin"
+	log "github.com/sirupsen/logrus"
+)
+
+// Server is an instance of a peer server that houses the listener and store.
+type Server struct {
+	store              store.BlobStore
+	grp                *stop.Group
+	concurrentRequests int
+	missesCache        gcache.Cache
+	edgeToken          string
+}
+
+// NewServer returns an initialized Server pointer.
+func NewServer(store store.BlobStore, requestQueueSize int, edgeToken string) *Server {
+	return &Server{
+		store:              store,
+		grp:                stop.New(),
+		concurrentRequests: requestQueueSize,
+		missesCache:        gcache.New(2000).Expiration(5 * time.Minute).ARC().Build(),
+		edgeToken:          edgeToken,
+	}
+}
+
+// Shutdown gracefully shuts down the peer server.
+func (s *Server) Shutdown() {
+	log.Debug("shutting down HTTP server")
+	s.grp.StopAndWait()
+	log.Debug("HTTP server stopped")
+}
+
+// Start starts the server listener to handle connections.
+func (s *Server) Start(address string) error {
+	gin.SetMode(gin.ReleaseMode)
+	router := gin.New()
+	router.Use(gin.Logger())
+	// Install nice.Recovery, passing the handler to call after recovery
+	router.Use(nice.Recovery(s.recoveryHandler))
+	router.GET("/blob", s.getBlob)
+	router.HEAD("/blob", s.hasBlob)
+	srv := &http.Server{
+		Addr:    address,
+		Handler: router,
+	}
+	go s.listenForShutdown(srv)
+	go InitWorkers(s, s.concurrentRequests)
+	// Initializing the server in a goroutine so that
+	// it won't block the graceful shutdown handling below
+	s.grp.Add(1)
+	go func() {
+		defer s.grp.Done()
+		log.Println("HTTP server listening on " + address)
+		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			log.Fatalf("listen: %s\n", err)
+		}
+	}()
+	return nil
+}
+
+func (s *Server) listenForShutdown(listener *http.Server) {
+	<-s.grp.Ch()
+	// The context is used to inform the server it has 5 seconds to finish
+	// the request it is currently handling
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	if err := listener.Shutdown(ctx); err != nil {
+		log.Fatal("Server forced to shutdown:", err)
+	}
+}

server/http/worker.go

@@ -0,0 +1,46 @@
+package http
+
+import (
+	"sync"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+
+	"github.com/gin-gonic/gin"
+)
+
+type blobRequest struct {
+	c        *gin.Context
+	finished *sync.WaitGroup
+}
+
+var getReqCh = make(chan *blobRequest, 20000)
+
+func InitWorkers(server *Server, workers int) {
+	stopper := stop.New(server.grp)
+	for i := 0; i < workers; i++ {
+		metrics.RoutinesQueue.WithLabelValues("http", "worker").Inc()
+		go func(worker int) {
+			defer metrics.RoutinesQueue.WithLabelValues("http", "worker").Dec()
+			for {
+				select {
+				case <-stopper.Ch():
+				case r := <-getReqCh:
+					process(server, r)
+					metrics.HttpBlobReqQueue.Dec()
+				}
+			}
+		}(i)
+	}
+}
+
+func enqueue(b *blobRequest) {
+	metrics.HttpBlobReqQueue.Inc()
+	getReqCh <- b
+}
+
+func process(server *Server, r *blobRequest) {
+	server.HandleGetBlob(r.c)
+	r.finished.Done()
+}

server/http3/client.go

@@ -0,0 +1,141 @@
+package http3
+
+import (
+	"bytes"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+	"github.com/lbryio/reflector.go/store"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	"github.com/quic-go/quic-go/http3"
+	log "github.com/sirupsen/logrus"
+)
+
+// Client is an instance of a client connected to a server.
+type Client struct {
+	Timeout      time.Duration
+	conn         *http.Client
+	roundTripper *http3.RoundTripper
+	ServerAddr   string
+}
+
+// Close closes the connection with the client.
+func (c *Client) Close() error {
+	c.conn.CloseIdleConnections()
+	return c.roundTripper.Close()
+}
+
+// GetStream gets a stream
+func (c *Client) GetStream(sdHash string, blobCache store.BlobStore) (stream.Stream, error) {
+	var sd stream.SDBlob
+
+	b, _, err := c.GetBlob(sdHash)
+	if err != nil {
+		return nil, err
+	}
+
+	err = sd.FromBlob(b)
+	if err != nil {
+		return nil, err
+	}
+
+	s := make(stream.Stream, len(sd.BlobInfos)+1-1) // +1 for sd blob, -1 for last null blob
+	s[0] = b
+
+	for i := 0; i < len(sd.BlobInfos)-1; i++ {
+		var trace shared.BlobTrace
+		s[i+1], trace, err = c.GetBlob(hex.EncodeToString(sd.BlobInfos[i].BlobHash))
+		if err != nil {
+			return nil, err
+		}
+		log.Debug(trace.String())
+	}
+
+	return s, nil
+}
+
+// HasBlob checks if the blob is available
+func (c *Client) HasBlob(hash string) (bool, error) {
+	resp, err := c.conn.Get(fmt.Sprintf("https://%s/has/%s", c.ServerAddr, hash))
+	if err != nil {
+		return false, errors.Err(err)
+	}
+	defer func() { _ = resp.Body.Close() }()
+	if resp.StatusCode == http.StatusOK {
+		return true, nil
+	}
+	if resp.StatusCode == http.StatusNotFound {
+		return false, nil
+	}
+	return false, errors.Err("non 200 status code returned: %d", resp.StatusCode)
+}
+
+// GetBlob gets a blob
+func (c *Client) GetBlob(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	resp, err := c.conn.Get(fmt.Sprintf("https://%s/get/%s?trace=true", c.ServerAddr, hash))
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), "http3"), errors.Err(err)
+	}
+	defer func() { _ = resp.Body.Close() }()
+
+	if resp.StatusCode == http.StatusNotFound {
+		fmt.Printf("%s blob not found %d\n", hash, resp.StatusCode)
+		return nil, shared.NewBlobTrace(time.Since(start), "http3"), errors.Err(store.ErrBlobNotFound)
+	} else if resp.StatusCode != http.StatusOK {
+		return nil, shared.NewBlobTrace(time.Since(start), "http3"), errors.Err("non 200 status code returned: %d", resp.StatusCode)
+	}
+
+	tmp := getBuffer()
+	defer putBuffer(tmp)
+	serialized := resp.Header.Get("Via")
+	trace := shared.NewBlobTrace(time.Since(start), "http3")
+	if serialized != "" {
+		parsedTrace, err := shared.Deserialize(serialized)
+		if err != nil {
+			return nil, shared.NewBlobTrace(time.Since(start), "http3"), err
+		}
+		trace = *parsedTrace
+	}
+	written, err := io.Copy(tmp, resp.Body)
+	if err != nil {
+		return nil, trace.Stack(time.Since(start), "http3"), errors.Err(err)
+	}
+
+	blob := make([]byte, written)
+	copy(blob, tmp.Bytes())
+
+	metrics.MtrInBytesUdp.Add(float64(len(blob)))
+
+	return blob, trace.Stack(time.Since(start), "http3"), nil
+}
+
+// buffer pool to reduce GC
+// https://www.captaincodeman.com/2017/06/02/golang-buffer-pool-gotcha
+var buffers = sync.Pool{
+	// New is called when a new instance is needed
+	New: func() interface{} {
+		buf := make([]byte, 0, stream.MaxBlobSize)
+		return bytes.NewBuffer(buf)
+	},
+}
+
+// getBuffer fetches a buffer from the pool
+func getBuffer() *bytes.Buffer {
+	return buffers.Get().(*bytes.Buffer)
+}
+
+// putBuffer returns a buffer to the pool
+func putBuffer(buf *bytes.Buffer) {
+	buf.Reset()
+	buffers.Put(buf)
+}

server/http3/server.go

@@ -0,0 +1,216 @@
+package http3
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/json"
+	"encoding/pem"
+	"fmt"
+	"math/big"
+	"net/http"
+	"strconv"
+	"sync"
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/reflector"
+	"github.com/lbryio/reflector.go/store"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+
+	"github.com/gorilla/mux"
+	"github.com/quic-go/quic-go"
+	"github.com/quic-go/quic-go/http3"
+	log "github.com/sirupsen/logrus"
+)
+
+// Server is an instance of a peer server that houses the listener and store.
+type Server struct {
+	store              store.BlobStore
+	grp                *stop.Group
+	concurrentRequests int
+}
+
+// NewServer returns an initialized Server pointer.
+func NewServer(store store.BlobStore, requestQueueSize int) *Server {
+	return &Server{
+		store:              store,
+		grp:                stop.New(),
+		concurrentRequests: requestQueueSize,
+	}
+}
+
+// Shutdown gracefully shuts down the peer server.
+func (s *Server) Shutdown() {
+	log.Debug("shutting down http3 peer server")
+	s.grp.StopAndWait()
+	log.Debug("http3 peer server stopped")
+}
+
+func (s *Server) logError(e error) {
+	if e == nil {
+		return
+	}
+	shouldLog := metrics.TrackError(metrics.DirectionDownload, e)
+	if shouldLog {
+		log.Errorln(errors.FullTrace(e))
+	}
+}
+
+type availabilityResponse struct {
+	LbrycrdAddress string `json:"lbrycrd_address"`
+	IsAvailable    bool   `json:"is_available"`
+}
+
+// Start starts the server listener to handle connections.
+func (s *Server) Start(address string) error {
+	log.Println("HTTP3 peer listening on " + address)
+	window500M := 500 * 1 << 20
+
+	quicConf := &quic.Config{
+		MaxStreamReceiveWindow:     uint64(window500M),
+		MaxConnectionReceiveWindow: uint64(window500M),
+		EnableDatagrams:            true,
+		HandshakeIdleTimeout:       4 * time.Second,
+		MaxIdleTimeout:             20 * time.Second,
+	}
+	r := mux.NewRouter()
+	r.HandleFunc("/get/{hash}", func(w http.ResponseWriter, r *http.Request) {
+		waiter := &sync.WaitGroup{}
+		waiter.Add(1)
+		enqueue(&blobRequest{request: r, reply: w, finished: waiter})
+		waiter.Wait()
+	})
+	r.HandleFunc("/has/{hash}", func(w http.ResponseWriter, r *http.Request) {
+		vars := mux.Vars(r)
+		requestedBlob := vars["hash"]
+		blobExists, err := s.store.Has(requestedBlob)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			s.logError(err)
+			return
+		}
+		if !blobExists {
+			w.WriteHeader(http.StatusNotFound)
+		}
+		// LbrycrdAddress to be used when paying for data. Not implemented yet.
+		const LbrycrdAddress = "bJxKvpD96kaJLriqVajZ7SaQTsWWyrGQct"
+		resp, err := json.Marshal(availabilityResponse{
+			LbrycrdAddress: LbrycrdAddress,
+			IsAvailable:    blobExists,
+		})
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			s.logError(err)
+			return
+		}
+		_, err = w.Write(resp)
+		if err != nil {
+			s.logError(err)
+		}
+	})
+	server := http3.Server{
+		Addr:       address,
+		Handler:    r,
+		TLSConfig:  generateTLSConfig(),
+		QUICConfig: quicConf,
+	}
+	go InitWorkers(s, s.concurrentRequests)
+	go s.listenForShutdown(&server)
+	s.grp.Add(1)
+	go func() {
+		s.listenAndServe(&server)
+		s.grp.Done()
+	}()
+
+	return nil
+}
+
+// Setup a bare-bones TLS config for the server
+func generateTLSConfig() *tls.Config {
+	key, err := rsa.GenerateKey(rand.Reader, 1024)
+	if err != nil {
+		panic(err)
+	}
+	template := x509.Certificate{SerialNumber: big.NewInt(1)}
+	certDER, err := x509.CreateCertificate(rand.Reader, &template, &template, &key.PublicKey, key)
+	if err != nil {
+		panic(err)
+	}
+	keyPEM := pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(key)})
+	certPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certDER})
+
+	tlsCert, err := tls.X509KeyPair(certPEM, keyPEM)
+	if err != nil {
+		panic(err)
+	}
+	return &tls.Config{
+		Certificates: []tls.Certificate{tlsCert},
+		NextProtos:   []string{"http3-reflector-server"},
+	}
+}
+
+func (s *Server) listenAndServe(server *http3.Server) {
+	err := server.ListenAndServe()
+	if err != nil && err != quic.ErrServerClosed {
+		log.Errorln(errors.FullTrace(err))
+	}
+}
+
+func (s *Server) listenForShutdown(listener *http3.Server) {
+	<-s.grp.Ch()
+	err := listener.Close()
+	if err != nil {
+		log.Error("error closing listener for peer server - ", err)
+	}
+}
+
+func (s *Server) HandleGetBlob(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	requestedBlob := vars["hash"]
+	traceParam := r.URL.Query().Get("trace")
+	var err error
+	wantsTrace := false
+	if traceParam != "" {
+		wantsTrace, err = strconv.ParseBool(traceParam)
+		if err != nil {
+			wantsTrace = false
+		}
+	}
+	if reflector.IsProtected(requestedBlob) {
+		http.Error(w, "requested blob is protected", http.StatusForbidden)
+		return
+	}
+	blob, trace, err := s.store.Get(requestedBlob)
+
+	if wantsTrace {
+		serialized, err := trace.Serialize()
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusNotFound)
+			return
+		}
+		w.Header().Add("Via", serialized)
+		log.Debug(trace.String())
+	}
+	if err != nil {
+		if errors.Is(err, store.ErrBlobNotFound) {
+			http.Error(w, err.Error(), http.StatusNotFound)
+			return
+		}
+		fmt.Printf("%s: %s", requestedBlob, errors.FullTrace(err))
+		s.logError(err)
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	_, err = w.Write(blob)
+	if err != nil {
+		s.logError(err)
+	}
+	metrics.MtrOutBytesUdp.Add(float64(len(blob)))
+	metrics.BlobDownloadCount.Inc()
+	metrics.Http3DownloadCount.Inc()
+}

server/http3/store.go

@@ -0,0 +1,117 @@
+package http3
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/lbryio/reflector.go/shared"
+	"github.com/lbryio/reflector.go/store"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	"github.com/quic-go/quic-go"
+	"github.com/quic-go/quic-go/http3"
+)
+
+// Store is a blob store that gets blobs from a peer.
+// It satisfies the store.BlobStore interface but cannot put or delete blobs.
+type Store struct {
+	opts          StoreOpts
+	NotFoundCache *sync.Map
+}
+
+// StoreOpts allows to set options for a new Store.
+type StoreOpts struct {
+	Address string
+	Timeout time.Duration
+}
+
+// NewStore makes a new peer store.
+func NewStore(opts StoreOpts) *Store {
+	return &Store{opts: opts, NotFoundCache: &sync.Map{}}
+}
+
+func (p *Store) getClient() (*Client, error) {
+	var qconf quic.Config
+	window500M := 500 * 1 << 20
+	qconf.MaxStreamReceiveWindow = uint64(window500M)
+	qconf.MaxConnectionReceiveWindow = uint64(window500M)
+	qconf.EnableDatagrams = true
+	qconf.HandshakeIdleTimeout = 4 * time.Second
+	qconf.MaxIdleTimeout = 20 * time.Second
+	pool, err := x509.SystemCertPool()
+	if err != nil {
+		return nil, err
+	}
+	roundTripper := &http3.RoundTripper{
+		TLSClientConfig: &tls.Config{
+			RootCAs:            pool,
+			InsecureSkipVerify: true,
+		},
+		QUICConfig: &qconf,
+	}
+	connection := &http.Client{
+		Transport: roundTripper,
+	}
+	c := &Client{
+		conn:         connection,
+		roundTripper: roundTripper,
+		ServerAddr:   p.opts.Address,
+	}
+	return c, errors.Prefix("connection error", err)
+}
+
+func (p *Store) Name() string { return "http3" }
+
+// Has asks the peer if they have a hash
+func (p *Store) Has(hash string) (bool, error) {
+	c, err := p.getClient()
+	if err != nil {
+		return false, err
+	}
+	defer func() { _ = c.Close() }()
+	return c.HasBlob(hash)
+}
+
+// Get downloads the blob from the peer
+func (p *Store) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	if lastChecked, ok := p.NotFoundCache.Load(hash); ok {
+		if lastChecked.(time.Time).After(time.Now().Add(-5 * time.Minute)) {
+			return nil, shared.NewBlobTrace(time.Since(start), p.Name()+"-notfoundcache"), store.ErrBlobNotFound
+		}
+	}
+	c, err := p.getClient()
+	if err != nil && strings.Contains(err.Error(), "blob not found") {
+		p.NotFoundCache.Store(hash, time.Now())
+	}
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), p.Name()), err
+	}
+	defer func() { _ = c.Close() }()
+	return c.GetBlob(hash)
+}
+
+// Put is not supported
+func (p *Store) Put(hash string, blob stream.Blob) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// PutSD is not supported
+func (p *Store) PutSD(hash string, blob stream.Blob) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Delete is not supported
+func (p *Store) Delete(hash string) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Shutdown is not supported
+func (p *Store) Shutdown() {
+}

server/http3/worker.go

@@ -0,0 +1,46 @@
+package http3
+
+import (
+	"net/http"
+	"sync"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+)
+
+type blobRequest struct {
+	request  *http.Request
+	reply    http.ResponseWriter
+	finished *sync.WaitGroup
+}
+
+var getReqCh = make(chan *blobRequest, 20000)
+
+func InitWorkers(server *Server, workers int) {
+	stopper := stop.New(server.grp)
+	for i := 0; i < workers; i++ {
+		metrics.RoutinesQueue.WithLabelValues("http3", "worker").Inc()
+		go func(worker int) {
+			defer metrics.RoutinesQueue.WithLabelValues("http3", "worker").Dec()
+			for {
+				select {
+				case <-stopper.Ch():
+				case r := <-getReqCh:
+					metrics.Http3BlobReqQueue.Dec()
+					process(server, r)
+				}
+			}
+		}(i)
+	}
+}
+
+func enqueue(b *blobRequest) {
+	metrics.Http3BlobReqQueue.Inc()
+	getReqCh <- b
+}
+
+func process(server *Server, r *blobRequest) {
+	server.HandleGetBlob(r.reply, r.request)
+	r.finished.Done()
+}

server/peer/client.go

@@ -0,0 +1,207 @@
+package peer
+
+import (
+	"bufio"
+	"encoding/hex"
+	"encoding/json"
+	"io"
+	"net"
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+	"github.com/lbryio/reflector.go/store"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// Client is an instance of a client connected to a server.
+type Client struct {
+	Timeout   time.Duration
+	conn      net.Conn
+	buf       *bufio.Reader
+	connected bool
+}
+
+// Connect connects to a specific clients and errors if it cannot be contacted.
+func (c *Client) Connect(address string) error {
+	var err error
+	if c.Timeout == 0 {
+		c.Timeout = 5 * time.Second
+	}
+	c.conn, err = net.Dial("tcp4", address)
+	if err != nil {
+		return err
+	}
+	c.connected = true
+	c.buf = bufio.NewReader(c.conn)
+	return nil
+}
+
+// Close closes the connection with the client.
+func (c *Client) Close() error {
+	c.connected = false
+	return c.conn.Close()
+}
+
+// GetStream gets a stream
+func (c *Client) GetStream(sdHash string, blobCache store.BlobStore) (stream.Stream, error) {
+	if !c.connected {
+		return nil, errors.Err("not connected")
+	}
+
+	var sd stream.SDBlob
+
+	b, trace, err := c.GetBlob(sdHash)
+	if err != nil {
+		return nil, err
+	}
+	log.Debug(trace.String())
+
+	err = sd.FromBlob(b)
+	if err != nil {
+		return nil, err
+	}
+
+	s := make(stream.Stream, len(sd.BlobInfos)+1-1) // +1 for sd blob, -1 for last null blob
+	s[0] = b
+
+	for i := 0; i < len(sd.BlobInfos)-1; i++ {
+		s[i+1], trace, err = c.GetBlob(hex.EncodeToString(sd.BlobInfos[i].BlobHash))
+		if err != nil {
+			return nil, err
+		}
+		log.Debug(trace.String())
+	}
+
+	return s, nil
+}
+
+// HasBlob checks if the blob is available
+func (c *Client) HasBlob(hash string) (bool, error) {
+	if !c.connected {
+		return false, errors.Err("not connected")
+	}
+
+	sendRequest, err := json.Marshal(availabilityRequest{
+		RequestedBlobs: []string{hash},
+	})
+	if err != nil {
+		return false, err
+	}
+
+	err = c.write(sendRequest)
+	if err != nil {
+		return false, err
+	}
+
+	var resp availabilityResponse
+	err = c.read(&resp)
+	if err != nil {
+		return false, err
+	}
+
+	for _, h := range resp.AvailableBlobs {
+		if h == hash {
+			return true, nil
+		}
+	}
+
+	return false, nil
+}
+
+// GetBlob gets a blob
+func (c *Client) GetBlob(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	if !c.connected {
+		return nil, shared.NewBlobTrace(time.Since(start), "tcp"), errors.Err("not connected")
+	}
+
+	sendRequest, err := json.Marshal(blobRequest{
+		RequestedBlob: hash,
+	})
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), "tcp"), err
+	}
+
+	err = c.write(sendRequest)
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), "tcp"), err
+	}
+
+	var resp blobResponse
+	err = c.read(&resp)
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), "tcp"), err
+	}
+
+	trace := shared.NewBlobTrace(time.Since(start), "tcp")
+	if resp.RequestTrace != nil {
+		trace = *resp.RequestTrace
+	}
+	if resp.IncomingBlob.Error != "" {
+		return nil, trace, errors.Prefix(hash[:8], resp.IncomingBlob.Error)
+	}
+	if resp.IncomingBlob.BlobHash != hash {
+		return nil, trace.Stack(time.Since(start), "tcp"), errors.Prefix(hash[:8], "blob hash in response does not match requested hash")
+	}
+	if resp.IncomingBlob.Length <= 0 {
+		return nil, trace, errors.Prefix(hash[:8], "length reported as <= 0")
+	}
+
+	log.Debugf("receiving blob %s from %s", hash[:8], c.conn.RemoteAddr())
+
+	blob, err := c.readRawBlob(resp.IncomingBlob.Length)
+	if err != nil {
+		return nil, (*resp.RequestTrace).Stack(time.Since(start), "tcp"), err
+	}
+	metrics.MtrInBytesTcp.Add(float64(len(blob)))
+	return blob, trace.Stack(time.Since(start), "tcp"), nil
+}
+
+func (c *Client) read(v interface{}) error {
+	err := c.conn.SetReadDeadline(time.Now().Add(c.Timeout))
+	if err != nil {
+		return errors.Err(err)
+	}
+
+	m, err := readNextMessage(c.buf)
+	if err != nil {
+		return err
+	}
+
+	log.Debugf("read %d bytes from %s", len(m), c.conn.RemoteAddr())
+
+	err = json.Unmarshal(m, v)
+	return errors.Err(err)
+}
+
+func (c *Client) readRawBlob(blobSize int) ([]byte, error) {
+	err := c.conn.SetReadDeadline(time.Now().Add(c.Timeout))
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+
+	blob := make([]byte, blobSize)
+	n, err := io.ReadFull(c.buf, blob)
+	log.Debugf("read %d bytes from %s", n, c.conn.RemoteAddr())
+	return blob, errors.Err(err)
+}
+
+func (c *Client) write(b []byte) error {
+	err := c.conn.SetWriteDeadline(time.Now().Add(c.Timeout))
+	if err != nil {
+		return errors.Err(err)
+	}
+
+	log.Debugf("writing %d bytes to %s", len(b), c.conn.RemoteAddr())
+
+	n, err := c.conn.Write(b)
+	if err == nil && n != len(b) {
+		err = io.ErrShortWrite
+	}
+	return errors.Err(err)
+}

server/peer/server.go

@@ -2,17 +2,22 @@ package peer
 
 import (
 	"bufio"
+	"encoding/hex"
 	"encoding/json"
+	ee "errors"
 	"io"
 	"net"
 	"strings"
 	"time"
 
+	"github.com/lbryio/reflector.go/internal/metrics"
 	"github.com/lbryio/reflector.go/reflector"
+	"github.com/lbryio/reflector.go/shared"
 	"github.com/lbryio/reflector.go/store"
 
-	"github.com/lbryio/lbry.go/extras/errors"
-	"github.com/lbryio/lbry.go/extras/stop"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+	"github.com/lbryio/lbry.go/v2/stream"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -26,14 +31,10 @@ const (
 
 // Server is an instance of a peer server that houses the listener and store.
 type Server struct {
-	StatLogger          *log.Logger   // logger to log stats
-	StatReportFrequency time.Duration // how often to log stats
-
 	store  store.BlobStore
 	closed bool
 
 	grp *stop.Group
-	stats *reflector.Stats
 }
 
 // NewServer returns an initialized Server pointer.
@@ -46,8 +47,7 @@ func NewServer(store store.BlobStore) *Server {
 
 // Shutdown gracefully shuts down the peer server.
 func (s *Server) Shutdown() {
-	log.Debug("shutting down peer server...")
-	s.stats.Shutdown()
+	log.Debug("shutting down peer server")
 	s.grp.StopAndWait()
 	log.Debug("peer server stopped")
 }
@@ -67,11 +67,6 @@ func (s *Server) Start(address string) error {
 		s.grp.Done()
 	}()
 
-	s.stats = reflector.NewStatLogger("DOWNLOAD", s.StatLogger, s.StatReportFrequency, s.grp.Child())
-	if s.StatLogger != nil && s.StatReportFrequency > 0 {
-		s.stats.Start()
-	}
-
 	return nil
 }
 
@@ -94,7 +89,9 @@ func (s *Server) listenAndServe(listener net.Listener) {
 			log.Error(errors.Prefix("accepting conn", err))
 		} else {
 			s.grp.Add(1)
+			metrics.RoutinesQueue.WithLabelValues("peer", "server-handleconn").Inc()
 			go func() {
+				defer metrics.RoutinesQueue.WithLabelValues("peer", "server-handleconn").Dec()
 				s.handleConnection(conn)
 				s.grp.Done()
 			}()
@@ -110,6 +107,7 @@ func (s *Server) handleConnection(conn net.Conn) {
 	}()
 
 	timeoutDuration := 1 * time.Minute
+	buf := bufio.NewReader(conn)
 
 	for {
 		var request []byte
@@ -120,7 +118,7 @@ func (s *Server) handleConnection(conn net.Conn) {
 			log.Error(errors.FullTrace(err))
 		}
 
-		request, err = readNextRequest(conn)
+		request, err = readNextMessage(buf)
 		if err != nil {
 			if err != io.EOF {
 				s.logError(err)
@@ -135,7 +133,7 @@ func (s *Server) handleConnection(conn net.Conn) {
 
 		response, err = s.handleCompositeRequest(request)
 		if err != nil {
-			log.Error(err)
+			log.Error(errors.FullTrace(err))
 			return
 		}
 
@@ -166,14 +164,14 @@ func (s *Server) handleAvailabilityRequest(data []byte) ([]byte, error) {
 	var request availabilityRequest
 	err := json.Unmarshal(data, &request)
 	if err != nil {
-		return []byte{}, err
+		return nil, errors.Err(err)
 	}
 
 	availableBlobs := []string{}
 	for _, blobHash := range request.RequestedBlobs {
 		exists, err := s.store.Has(blobHash)
 		if err != nil {
-			return []byte{}, err
+			return nil, err
 		}
 		if exists {
 			availableBlobs = append(availableBlobs, blobHash)
@@ -183,99 +181,115 @@ func (s *Server) handleAvailabilityRequest(data []byte) ([]byte, error) {
 	return json.Marshal(availabilityResponse{LbrycrdAddress: LbrycrdAddress, AvailableBlobs: availableBlobs})
 }
 
-func (s *Server) handlePaymentRateNegotiation(data []byte) ([]byte, error) {
-	var request paymentRateRequest
-	err := json.Unmarshal(data, &request)
-	if err != nil {
-		return []byte{}, err
-	}
-
-	offerReply := paymentRateAccepted
-	if request.BlobDataPaymentRate < 0 {
-		offerReply = paymentRateTooLow
-	}
-
-	return json.Marshal(paymentRateResponse{BlobDataPaymentRate: offerReply})
-}
-
-func (s *Server) handleBlobRequest(data []byte) ([]byte, error) {
-	var request blobRequest
-	err := json.Unmarshal(data, &request)
-	if err != nil {
-		return []byte{}, err
-	}
-
-	log.Debugln("Sending blob " + request.RequestedBlob[:8])
-
-	blob, err := s.store.Get(request.RequestedBlob)
-	if err != nil {
-		return []byte{}, err
-	}
-
-	response, err := json.Marshal(blobResponse{IncomingBlob: incomingBlob{
-		BlobHash: reflector.BlobHash(blob),
-		Length:   len(blob),
-	}})
-	if err != nil {
-		return []byte{}, err
-	}
-
-	return append(response, blob...), nil
-}
+//func (s *Server) handlePaymentRateNegotiation(data []byte) ([]byte, error) {
+//	var request paymentRateRequest
+//	err := json.Unmarshal(data, &request)
+//	if err != nil {
+//		return nil, err
+//	}
+//
+//	offerReply := paymentRateAccepted
+//	if request.BlobDataPaymentRate < 0 {
+//		offerReply = paymentRateTooLow
+//	}
+//
+//	return json.Marshal(paymentRateResponse{BlobDataPaymentRate: offerReply})
+//}
+//
+//func (s *Server) handleBlobRequest(data []byte) ([]byte, error) {
+//	var request blobRequest
+//	err := json.Unmarshal(data, &request)
+//	if err != nil {
+//		return nil, err
+//	}
+//
+//	log.Debugln("Sending blob " + request.RequestedBlob[:8])
+//
+//	blob, err := s.store.Get(request.RequestedBlob)
+//	if err != nil {
+//		return nil, err
+//	}
+//
+//	response, err := json.Marshal(blobResponse{IncomingBlob: incomingBlob{
+//		BlobHash: reflector.BlobHash(blob),
+//		Length:   len(blob),
+//	}})
+//	if err != nil {
+//		return nil, err
+//	}
+//
+//	return append(response, blob...), nil
+//}
 
 func (s *Server) handleCompositeRequest(data []byte) ([]byte, error) {
 	var request compositeRequest
 	err := json.Unmarshal(data, &request)
 	if err != nil {
-		return []byte{}, err
+		var je *json.SyntaxError
+		if ee.As(err, &je) {
+			return nil, errors.Err("invalid json request: offset %d in data %s", je.Offset, hex.EncodeToString(data))
+		}
+		return nil, errors.Err(err)
 	}
 
 	response := compositeResponse{
 		LbrycrdAddress: LbrycrdAddress,
+		AvailableBlobs: []string{},
 	}
 
 	if len(request.RequestedBlobs) > 0 {
-		var availableBlobs []string
 		for _, blobHash := range request.RequestedBlobs {
+			if reflector.IsProtected(blobHash) {
+				return nil, errors.Err("requested blob is protected")
+			}
 			exists, err := s.store.Has(blobHash)
 			if err != nil {
-				return []byte{}, err
+				return nil, err
 			}
 			if exists {
-				availableBlobs = append(availableBlobs, blobHash)
+				response.AvailableBlobs = append(response.AvailableBlobs, blobHash)
 			}
 		}
-		response.AvailableBlobs = availableBlobs
 	}
 
+	if request.BlobDataPaymentRate != nil {
 		response.BlobDataPaymentRate = paymentRateAccepted
-	if request.BlobDataPaymentRate < 0 {
+		if *request.BlobDataPaymentRate < 0 {
 			response.BlobDataPaymentRate = paymentRateTooLow
 		}
+	}
 
 	var blob []byte
+	var trace shared.BlobTrace
 	if request.RequestedBlob != "" {
+		if len(request.RequestedBlob) != stream.BlobHashHexLength {
+			return nil, errors.Err("Invalid blob hash length")
+		}
+
 		log.Debugln("Sending blob " + request.RequestedBlob[:8])
 
-		blob, err = s.store.Get(request.RequestedBlob)
+		blob, trace, err = s.store.Get(request.RequestedBlob)
+		log.Debug(trace.String())
 		if errors.Is(err, store.ErrBlobNotFound) {
-			response.IncomingBlob = incomingBlob{
+			response.IncomingBlob = &incomingBlob{
 				Error: err.Error(),
 			}
 		} else if err != nil {
-			return []byte{}, err
+			return nil, err
 		} else {
-			response.IncomingBlob = incomingBlob{
-				BlobHash: reflector.BlobHash(blob),
+			response.IncomingBlob = &incomingBlob{
+				BlobHash: request.RequestedBlob,
 				Length:   len(blob),
 			}
-			s.stats.AddBlob()
+			metrics.MtrOutBytesTcp.Add(float64(len(blob)))
+			metrics.BlobDownloadCount.Inc()
+			metrics.PeerDownloadCount.Inc()
 		}
 	}
 
 	respData, err := json.Marshal(response)
 	if err != nil {
-		return []byte{}, err
+		return nil, err
 	}
 
 	return append(respData, blob...), nil
@@ -285,40 +299,30 @@ func (s *Server) logError(e error) {
 	if e == nil {
 		return
 	}
-	shouldLog := s.stats.AddError(e)
+	shouldLog := metrics.TrackError(metrics.DirectionDownload, e)
 	if shouldLog {
 		log.Errorln(errors.FullTrace(e))
 	}
-
-	return
-
-	// old stuff below. its here for posterity, because we're gonna have to deal with these errors someday for real
-
-	//err := errors.Wrap(e, 0)
-
-	// these happen because the peer protocol does not have a way to cancel blob downloads
-	// so the client will just close the connection if its in the middle of downloading a blob
-	// but receives the blob from a different peer first or simply goes offline (timeout)
-	//if strings.Contains(err.Error(), "connection reset by peer") ||
-	//	strings.Contains(err.Error(), "i/o timeout") ||
-	//	strings.Contains(err.Error(), "broken pipe") {
-	//	return
-	//}
-	//
-	//log.Error(errors.FullTrace(e))
 }
 
-func readNextRequest(conn net.Conn) ([]byte, error) {
-	request := make([]byte, 0)
+func readNextMessage(buf *bufio.Reader) ([]byte, error) {
+	first_byte, err := buf.ReadByte()
+	if err != nil {
+		return nil, err
+	}
+	if first_byte != '{' {
+		// every request starts with '{'. Checking here disconnects earlier, so we don't wait until timeout
+		return nil, errInvalidData
+	}
+	msg := []byte("{")
 	eof := false
-	buf := bufio.NewReader(conn)
 
 	for {
 		chunk, err := buf.ReadBytes('}')
 		if err != nil {
 			if err != io.EOF {
 				//log.Errorln("readBytes error:", err) // logged by caller
-				return request, err
+				return msg, err
 			}
 			eof = true
 		}
@@ -327,14 +331,16 @@ func readNextRequest(conn net.Conn) ([]byte, error) {
 		//spew.Dump(chunk)
 
 		if len(chunk) > 0 {
-			request = append(request, chunk...)
+			msg = append(msg, chunk...)
 
-			if len(request) > maxRequestSize {
-				return request, errRequestTooLarge
+			if len(msg) > maxRequestSize {
+				return msg, errRequestTooLarge
+			} else if len(msg) > 0 && msg[0] != '{' {
+				return msg, errInvalidData
 			}
 
 			// yes, this is how the peer protocol knows when the request finishes
-			if reflector.IsValidJSON(request) {
+			if reflector.IsValidJSON(msg) {
 				break
 			}
 		}
@@ -349,11 +355,11 @@ func readNextRequest(conn net.Conn) ([]byte, error) {
 	//	spew.Dump(request)
 	//}
 
-	if len(request) == 0 && eof {
-		return []byte{}, io.EOF
+	if len(msg) == 0 && eof {
+		return nil, io.EOF
 	}
 
-	return request, nil
+	return msg, nil
 }
 
 const (
@@ -365,6 +371,7 @@ const (
 )
 
 var errRequestTooLarge = errors.Base("request is too large")
+var errInvalidData = errors.Base("Invalid data")
 
 type availabilityRequest struct {
 	LbrycrdAddress bool     `json:"lbrycrd_address"`
@@ -395,18 +402,19 @@ type incomingBlob struct {
 }
 type blobResponse struct {
 	IncomingBlob incomingBlob `json:"incoming_blob"`
+	RequestTrace *shared.BlobTrace
 }
 
 type compositeRequest struct {
 	LbrycrdAddress      bool     `json:"lbrycrd_address"`
 	RequestedBlobs      []string `json:"requested_blobs"`
-	BlobDataPaymentRate float64  `json:"blob_data_payment_rate"`
+	BlobDataPaymentRate *float64 `json:"blob_data_payment_rate"`
 	RequestedBlob       string   `json:"requested_blob"`
 }
 
 type compositeResponse struct {
 	LbrycrdAddress      string        `json:"lbrycrd_address,omitempty"`
-	AvailableBlobs      []string     `json:"available_blobs,omitempty"`
+	AvailableBlobs      []string      `json:"available_blobs"`
 	BlobDataPaymentRate string        `json:"blob_data_payment_rate,omitempty"`
-	IncomingBlob        incomingBlob `json:"incoming_blob,omitempty"`
+	IncomingBlob        *incomingBlob `json:"incoming_blob,omitempty"`
 }

server/peer/server_test.go

@@ -2,7 +2,10 @@ package peer
 
 import (
 	"bytes"
+	"io"
+	"net"
 	"testing"
+	"time"
 
 	"github.com/lbryio/reflector.go/store"
 )
@@ -34,7 +37,7 @@ var availabilityRequests = []pair{
 }
 
 func getServer(t *testing.T, withBlobs bool) *Server {
-	st := store.MemoryBlobStore{}
+	st := store.NewMemStore()
 	if withBlobs {
 		for k, v := range blobs {
 			err := st.Put(k, v)
@@ -43,7 +46,7 @@ func getServer(t *testing.T, withBlobs bool) *Server {
 			}
 		}
 	}
-	return NewServer(&st)
+	return NewServer(st)
 }
 
 func TestAvailabilityRequest_NoBlobs(t *testing.T) {
@@ -75,3 +78,62 @@ func TestAvailabilityRequest_WithBlobs(t *testing.T) {
 		}
 	}
 }
+
+func TestRequestFromConnection(t *testing.T) {
+	s := getServer(t, true)
+	err := s.Start("127.0.0.1:50505")
+	defer s.Shutdown()
+	if err != nil {
+		t.Error("error starting server", err)
+	}
+
+	for _, p := range availabilityRequests {
+		conn, err := net.Dial("tcp", "127.0.0.1:50505")
+		if err != nil {
+			t.Error("error opening connection", err)
+		}
+		defer func() { _ = conn.Close() }()
+
+		response := make([]byte, 8192)
+		_, err = conn.Write(p.request)
+		if err != nil {
+			t.Error("error writing", err)
+		}
+		_, err = conn.Read(response)
+		if err != nil {
+			t.Error("error reading", err)
+		}
+		if !bytes.Equal(response[:len(p.response)], p.response) {
+			t.Errorf("Response did not match expected response.\nExpected: %s\nGot: %s", string(p.response), string(response))
+		}
+	}
+}
+
+func TestInvalidData(t *testing.T) {
+	s := getServer(t, true)
+	err := s.Start("127.0.0.1:50503")
+	defer s.Shutdown()
+	if err != nil {
+		t.Error("error starting server", err)
+	}
+	conn, err := net.Dial("tcp", "127.0.0.1:50503")
+	if err != nil {
+		t.Error("error opening connection", err)
+	}
+	defer func() { _ = conn.Close() }()
+
+	response := make([]byte, 8192)
+	_, err = conn.Write([]byte("hello dear server, I would like blobs. Please"))
+	if err != nil {
+		t.Error("error writing", err)
+	}
+	err = conn.SetReadDeadline(time.Now().Add(5 * time.Second))
+	if err != nil {
+		t.Error("error setting read deadline", err)
+	}
+	_, err = conn.Read(response)
+	if err != io.EOF {
+		t.Error("error reading", err)
+	}
+	println(response)
+}

server/peer/store.go

@@ -0,0 +1,82 @@
+package peer
+
+import (
+	"strings"
+	"time"
+
+	"github.com/lbryio/reflector.go/shared"
+	"github.com/lbryio/reflector.go/store"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+)
+
+// Store is a blob store that gets blobs from a peer.
+// It satisfies the store.BlobStore interface but cannot put or delete blobs.
+type Store struct {
+	opts StoreOpts
+}
+
+// StoreOpts allows to set options for a new Store.
+type StoreOpts struct {
+	Address string
+	Timeout time.Duration
+}
+
+// NewStore makes a new peer store.
+func NewStore(opts StoreOpts) *Store {
+	return &Store{opts: opts}
+}
+
+func (p *Store) getClient() (*Client, error) {
+	c := &Client{Timeout: p.opts.Timeout}
+	err := c.Connect(p.opts.Address)
+	return c, errors.Prefix("connection error", err)
+}
+
+func (p *Store) Name() string { return "peer" }
+
+// Has asks the peer if they have a hash
+func (p *Store) Has(hash string) (bool, error) {
+	c, err := p.getClient()
+	if err != nil {
+		return false, err
+	}
+	defer func() { _ = c.Close() }()
+	return c.HasBlob(hash)
+}
+
+// Get downloads the blob from the peer
+func (p *Store) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	c, err := p.getClient()
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), p.Name()), err
+	}
+	defer func() { _ = c.Close() }()
+	blob, trace, err := c.GetBlob(hash)
+	if err != nil && strings.Contains(err.Error(), "blob not found") {
+		return nil, trace, store.ErrBlobNotFound
+	}
+
+	return blob, trace, err
+}
+
+// Put is not supported
+func (p *Store) Put(hash string, blob stream.Blob) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// PutSD is not supported
+func (p *Store) PutSD(hash string, blob stream.Blob) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Delete is not supported
+func (p *Store) Delete(hash string) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Shutdown is not supported
+func (p *Store) Shutdown() {
+}

shared/errors.go

@@ -0,0 +1,6 @@
+package shared
+
+import "github.com/lbryio/lbry.go/v2/extras/errors"
+
+//ErrNotImplemented is a standard error when a store that implements the store interface does not implement a method
+var ErrNotImplemented = errors.Base("this store does not implement this method")

shared/shared.go

@@ -0,0 +1,82 @@
+package shared
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+)
+
+type BlobStack struct {
+	Timing     time.Duration `json:"timing"`
+	OriginName string        `json:"origin_name"`
+	HostName   string        `json:"host_name"`
+}
+type BlobTrace struct {
+	Stacks []BlobStack `json:"stacks"`
+}
+
+var hostName *string
+
+func getHostName() string {
+	if hostName == nil {
+		hn, err := os.Hostname()
+		if err != nil {
+			hn = "unknown"
+		}
+		hostName = &hn
+	}
+	return *hostName
+}
+func (b *BlobTrace) Stack(timing time.Duration, originName string) BlobTrace {
+	b.Stacks = append(b.Stacks, BlobStack{
+		Timing:     timing,
+		OriginName: originName,
+		HostName:   getHostName(),
+	})
+	return *b
+}
+func (b *BlobTrace) Merge(otherTrance BlobTrace) BlobTrace {
+	b.Stacks = append(b.Stacks, otherTrance.Stacks...)
+	return *b
+}
+func NewBlobTrace(timing time.Duration, originName string) BlobTrace {
+	b := BlobTrace{}
+	b.Stacks = append(b.Stacks, BlobStack{
+		Timing:     timing,
+		OriginName: originName,
+		HostName:   getHostName(),
+	})
+	return b
+}
+
+func (b BlobTrace) String() string {
+	var fullTrace string
+	for i, stack := range b.Stacks {
+		delta := time.Duration(0)
+		if i > 0 {
+			delta = stack.Timing - b.Stacks[i-1].Timing
+		}
+		fullTrace += fmt.Sprintf("[%d](%s) origin: %s - timing: %s - delta: %s\n", i, stack.HostName, stack.OriginName, stack.Timing.String(), delta.String())
+	}
+	return fullTrace
+}
+
+func (b BlobTrace) Serialize() (string, error) {
+	t, err := json.Marshal(b)
+	if err != nil {
+		return "", errors.Err(err)
+	}
+	return string(t), nil
+}
+
+func Deserialize(serializedData string) (*BlobTrace, error) {
+	var trace BlobTrace
+	err := json.Unmarshal([]byte(serializedData), &trace)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+	return &trace, nil
+}

shared/shared_test.go

@@ -0,0 +1,36 @@
+package shared
+
+import (
+	"testing"
+	"time"
+
+	"github.com/lbryio/lbry.go/v2/extras/util"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBlobTrace_Serialize(t *testing.T) {
+	hostName = util.PtrToString("test_machine")
+	stack := NewBlobTrace(10*time.Second, "test")
+	stack.Stack(20*time.Second, "test2")
+	stack.Stack(30*time.Second, "test3")
+	serialized, err := stack.Serialize()
+	assert.NoError(t, err)
+	t.Log(serialized)
+	expected := "{\"stacks\":[{\"timing\":10000000000,\"origin_name\":\"test\",\"host_name\":\"test_machine\"},{\"timing\":20000000000,\"origin_name\":\"test2\",\"host_name\":\"test_machine\"},{\"timing\":30000000000,\"origin_name\":\"test3\",\"host_name\":\"test_machine\"}]}"
+	assert.Equal(t, expected, serialized)
+}
+
+func TestBlobTrace_Deserialize(t *testing.T) {
+	hostName = util.PtrToString("test_machine")
+	serialized := "{\"stacks\":[{\"timing\":10000000000,\"origin_name\":\"test\"},{\"timing\":20000000000,\"origin_name\":\"test2\"},{\"timing\":30000000000,\"origin_name\":\"test3\"}]}"
+	stack, err := Deserialize(serialized)
+	assert.NoError(t, err)
+	assert.Len(t, stack.Stacks, 3)
+	assert.Equal(t, stack.Stacks[0].Timing, 10*time.Second)
+	assert.Equal(t, stack.Stacks[1].Timing, 20*time.Second)
+	assert.Equal(t, stack.Stacks[2].Timing, 30*time.Second)
+	assert.Equal(t, stack.Stacks[0].OriginName, "test")
+	assert.Equal(t, stack.Stacks[1].OriginName, "test2")
+	assert.Equal(t, stack.Stacks[2].OriginName, "test3")
+}

store/atime_linux.go

@@ -0,0 +1,18 @@
+//go:build linux
+// +build linux
+
+package store
+
+import (
+	"os"
+	"syscall"
+	"time"
+)
+
+func timespecToTime(ts syscall.Timespec) time.Time {
+	return time.Unix(ts.Sec, ts.Nsec)
+}
+
+func atime(fi os.FileInfo) time.Time {
+	return timespecToTime(fi.Sys().(*syscall.Stat_t).Atim)
+}

store/atime_universal.go

@@ -0,0 +1,12 @@
+// +build !linux
+
+package store
+
+import (
+	"os"
+	"time"
+)
+
+func atime(fi os.FileInfo) time.Time {
+	return fi.ModTime()
+}

store/caching.go

@@ -0,0 +1,107 @@
+package store
+
+import (
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// CachingStore combines two stores, typically a local and a remote store, to improve performance.
+// Accessed blobs are stored in and retrieved from the cache. If they are not in the cache, they
+// are retrieved from the origin and cached. Puts are cached and also forwarded to the origin.
+type CachingStore struct {
+	origin, cache BlobStore
+	component     string
+}
+
+// NewCachingStore makes a new caching disk store and returns a pointer to it.
+func NewCachingStore(component string, origin, cache BlobStore) *CachingStore {
+	return &CachingStore{
+		component: component,
+		origin:    WithSingleFlight(component, origin),
+		cache:     WithSingleFlight(component, cache),
+	}
+}
+
+const nameCaching = "caching"
+
+// Name is the cache type name
+func (c *CachingStore) Name() string { return nameCaching }
+
+// Has checks the cache and then the origin for a hash. It returns true if either store has it.
+func (c *CachingStore) Has(hash string) (bool, error) {
+	has, err := c.cache.Has(hash)
+	if has || err != nil {
+		return has, err
+	}
+	return c.origin.Has(hash)
+}
+
+// Get tries to get the blob from the cache first, falling back to the origin. If the blob comes
+// from the origin, it is also stored in the cache.
+func (c *CachingStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	blob, trace, err := c.cache.Get(hash)
+	if err == nil || !errors.Is(err, ErrBlobNotFound) {
+		metrics.CacheHitCount.With(metrics.CacheLabels(c.cache.Name(), c.component)).Inc()
+		rate := float64(len(blob)) / 1024 / 1024 / time.Since(start).Seconds()
+		metrics.CacheRetrievalSpeed.With(map[string]string{
+			metrics.LabelCacheType: c.cache.Name(),
+			metrics.LabelComponent: c.component,
+			metrics.LabelSource:    "cache",
+		}).Set(rate)
+		return blob, trace.Stack(time.Since(start), c.Name()), err
+	}
+
+	metrics.CacheMissCount.With(metrics.CacheLabels(c.cache.Name(), c.component)).Inc()
+
+	blob, trace, err = c.origin.Get(hash)
+	if err != nil {
+		return nil, trace.Stack(time.Since(start), c.Name()), err
+	}
+	// do not do this async unless you're prepared to deal with mayhem
+	err = c.cache.Put(hash, blob)
+	if err != nil {
+		log.Errorf("error saving blob to underlying cache: %s", errors.FullTrace(err))
+	}
+	return blob, trace.Stack(time.Since(start), c.Name()), nil
+}
+
+// Put stores the blob in the origin and the cache
+func (c *CachingStore) Put(hash string, blob stream.Blob) error {
+	err := c.origin.Put(hash, blob)
+	if err != nil {
+		return err
+	}
+	return c.cache.Put(hash, blob)
+}
+
+// PutSD stores the sd blob in the origin and the cache
+func (c *CachingStore) PutSD(hash string, blob stream.Blob) error {
+	err := c.origin.PutSD(hash, blob)
+	if err != nil {
+		return err
+	}
+	return c.cache.PutSD(hash, blob)
+}
+
+// Delete deletes the blob from the origin and the cache
+func (c *CachingStore) Delete(hash string) error {
+	err := c.origin.Delete(hash)
+	if err != nil {
+		return err
+	}
+	return c.cache.Delete(hash)
+}
+
+// Shutdown shuts down the store gracefully
+func (c *CachingStore) Shutdown() {
+	c.origin.Shutdown()
+	c.cache.Shutdown()
+}

store/caching_test.go

@@ -0,0 +1,179 @@
+package store
+
+import (
+	"bytes"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/sirupsen/logrus"
+)
+
+func TestCachingStore_Put(t *testing.T) {
+	origin := NewMemStore()
+	cache := NewMemStore()
+	s := NewCachingStore("test", origin, cache)
+
+	b := []byte("this is a blob of stuff")
+	hash := "hash"
+
+	err := s.Put(hash, b)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	has, err := origin.Has(hash)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !has {
+		t.Errorf("failed to store blob in origin")
+	}
+
+	has, err = cache.Has(hash)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !has {
+		t.Errorf("failed to store blob in cache")
+	}
+}
+
+func TestCachingStore_CacheMiss(t *testing.T) {
+	origin := NewMemStore()
+	cache := NewMemStore()
+	s := NewCachingStore("test", origin, cache)
+
+	b := []byte("this is a blob of stuff")
+	hash := "hash"
+	err := origin.Put(hash, b)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	res, stack, err := s.Get(hash)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(b, res) {
+		t.Errorf("expected Get() to return %s, got %s", string(b), string(res))
+	}
+	time.Sleep(10 * time.Millisecond) //storing to cache is done async so let's give it some time
+
+	has, err := cache.Has(hash)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !has {
+		t.Errorf("Get() did not copy blob to cache")
+	}
+	t.Logf("stack: %s", stack.String())
+
+	res, stack, err = cache.Get(hash)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(b, res) {
+		t.Errorf("expected cached Get() to return %s, got %s", string(b), string(res))
+	}
+	t.Logf("stack: %s", stack.String())
+}
+
+func TestCachingStore_ThunderingHerd(t *testing.T) {
+	storeDelay := 100 * time.Millisecond
+	origin := NewSlowBlobStore(storeDelay)
+	cache := NewMemStore()
+	s := NewCachingStore("test", origin, cache)
+
+	b := []byte("this is a blob of stuff")
+	hash := "hash"
+	err := origin.Put(hash, b)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	wg := &sync.WaitGroup{}
+
+	getNoErr := func() {
+		res, _, err := s.Get(hash)
+		if err != nil {
+			logrus.Fatal(err)
+		}
+		if !bytes.Equal(b, res) {
+			t.Errorf("expected Get() to return %s, got %s", string(b), string(res))
+		}
+		wg.Done()
+	}
+
+	start := time.Now()
+
+	wg.Add(4)
+	go func() {
+		go getNoErr()
+		time.Sleep(10 * time.Millisecond)
+		go getNoErr()
+		time.Sleep(10 * time.Millisecond)
+		go getNoErr()
+		time.Sleep(10 * time.Millisecond)
+		go getNoErr()
+	}()
+
+	wg.Wait()
+	duration := time.Since(start)
+
+	// only the first getNoErr() should hit the origin. the rest should wait for the first request to return
+	// once the first returns, the others should return immediately
+	// therefore, if the delay much longer than 100ms, it means subsequent requests also went to the origin
+	expectedMaxDelay := storeDelay + 5*time.Millisecond // a bit of extra time to let requests finish
+	if duration > expectedMaxDelay {
+		t.Errorf("Expected delay of at most %s, got %s", expectedMaxDelay, duration)
+	}
+}
+
+// SlowBlobStore adds a delay to each request
+type SlowBlobStore struct {
+	mem   *MemStore
+	delay time.Duration
+}
+
+func NewSlowBlobStore(delay time.Duration) *SlowBlobStore {
+	return &SlowBlobStore{
+		mem:   NewMemStore(),
+		delay: delay,
+	}
+}
+func (s *SlowBlobStore) Name() string {
+	return "slow"
+}
+
+func (s *SlowBlobStore) Has(hash string) (bool, error) {
+	time.Sleep(s.delay)
+	return s.mem.Has(hash)
+}
+
+func (s *SlowBlobStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	time.Sleep(s.delay)
+	return s.mem.Get(hash)
+}
+
+func (s *SlowBlobStore) Put(hash string, blob stream.Blob) error {
+	time.Sleep(s.delay)
+	return s.mem.Put(hash, blob)
+}
+
+func (s *SlowBlobStore) PutSD(hash string, blob stream.Blob) error {
+	time.Sleep(s.delay)
+	return s.mem.PutSD(hash, blob)
+}
+
+func (s *SlowBlobStore) Delete(hash string) error {
+	time.Sleep(s.delay)
+	return s.mem.Delete(hash)
+}
+
+func (s *SlowBlobStore) Shutdown() {
+	return
+}

store/cloudfront_ro.go

@@ -0,0 +1,108 @@
+package store
+
+import (
+	"io"
+	"net/http"
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/meta"
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// CloudFrontROStore reads from cloudfront. All writes panic.
+type CloudFrontROStore struct {
+	endpoint string // cloudflare endpoint
+}
+
+// NewCloudFrontROStore returns an initialized CloudFrontROStore store pointer.
+func NewCloudFrontROStore(endpoint string) *CloudFrontROStore {
+	return &CloudFrontROStore{endpoint: endpoint}
+}
+
+const nameCloudFrontRO = "cloudfront_ro"
+
+// Name is the cache type name
+func (c *CloudFrontROStore) Name() string { return nameCloudFrontRO }
+
+// Has checks if the hash is in the store.
+func (c *CloudFrontROStore) Has(hash string) (bool, error) {
+	status, body, err := c.cfRequest(http.MethodHead, hash)
+	if err != nil {
+		return false, err
+	}
+	defer func() { _ = body.Close() }()
+	switch status {
+	case http.StatusNotFound, http.StatusForbidden:
+		return false, nil
+	case http.StatusOK:
+		return true, nil
+	default:
+		return false, errors.Err("unexpected status %d", status)
+	}
+}
+
+// Get gets the blob from Cloudfront.
+func (c *CloudFrontROStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	log.Debugf("Getting %s from S3", hash[:8])
+	start := time.Now()
+	defer func(t time.Time) {
+		log.Debugf("Getting %s from S3 took %s", hash[:8], time.Since(t).String())
+	}(start)
+
+	status, body, err := c.cfRequest(http.MethodGet, hash)
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), c.Name()), err
+	}
+	defer func() { _ = body.Close() }()
+	switch status {
+	case http.StatusNotFound, http.StatusForbidden:
+		return nil, shared.NewBlobTrace(time.Since(start), c.Name()), errors.Err(ErrBlobNotFound)
+	case http.StatusOK:
+		b, err := io.ReadAll(body)
+		if err != nil {
+			return nil, shared.NewBlobTrace(time.Since(start), c.Name()), errors.Err(err)
+		}
+		metrics.MtrInBytesS3.Add(float64(len(b)))
+		return b, shared.NewBlobTrace(time.Since(start), c.Name()), nil
+	default:
+		return nil, shared.NewBlobTrace(time.Since(start), c.Name()), errors.Err("unexpected status %d", status)
+	}
+}
+
+func (c *CloudFrontROStore) cfRequest(method, hash string) (int, io.ReadCloser, error) {
+	url := c.endpoint + hash
+	req, err := http.NewRequest(method, url, nil)
+	if err != nil {
+		return 0, nil, errors.Err(err)
+	}
+	req.Header.Add("User-Agent", "reflector.go/"+meta.Version())
+
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return 0, nil, errors.Err(err)
+	}
+
+	return res.StatusCode, res.Body, nil
+}
+
+func (c *CloudFrontROStore) Put(_ string, _ stream.Blob) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+func (c *CloudFrontROStore) PutSD(_ string, _ stream.Blob) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+func (c *CloudFrontROStore) Delete(_ string) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Shutdown shuts down the store gracefully
+func (c *CloudFrontROStore) Shutdown() {
+}

store/cloudfront_rw.go

@@ -0,0 +1,62 @@
+package store
+
+import (
+	"time"
+
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/stream"
+)
+
+// CloudFrontRWStore combines a Cloudfront and an S3 store. Reads go to Cloudfront/Wasabi, writes go to S3.
+type CloudFrontRWStore struct {
+	cf *ITTTStore
+	s3 *S3Store
+}
+
+// NewCloudFrontRWStore returns an initialized CloudFrontRWStore store pointer.
+// NOTE: It panics if either argument is nil.
+func NewCloudFrontRWStore(cf *ITTTStore, s3 *S3Store) *CloudFrontRWStore {
+	if cf == nil || s3 == nil {
+		panic("both stores must be set")
+	}
+	return &CloudFrontRWStore{cf: cf, s3: s3}
+}
+
+const nameCloudFrontRW = "cloudfront_rw"
+
+// Name is the cache type name
+func (c *CloudFrontRWStore) Name() string { return nameCloudFrontRW }
+
+// Has checks if the hash is in the store.
+func (c *CloudFrontRWStore) Has(hash string) (bool, error) {
+	return c.cf.Has(hash)
+}
+
+// Get gets the blob from Cloudfront.
+func (c *CloudFrontRWStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	blob, trace, err := c.cf.Get(hash)
+	return blob, trace.Stack(time.Since(start), c.Name()), err
+}
+
+// Put stores the blob on S3
+func (c *CloudFrontRWStore) Put(hash string, blob stream.Blob) error {
+	return c.s3.Put(hash, blob)
+}
+
+// PutSD stores the sd blob on S3
+func (c *CloudFrontRWStore) PutSD(hash string, blob stream.Blob) error {
+	return c.s3.PutSD(hash, blob)
+}
+
+// Delete deletes the blob from S3
+func (c *CloudFrontRWStore) Delete(hash string) error {
+	return c.s3.Delete(hash)
+}
+
+// Shutdown shuts down the store gracefully
+func (c *CloudFrontRWStore) Shutdown() {
+	c.s3.Shutdown()
+	c.cf.Shutdown()
+}

store/dbbacked.go

@@ -3,39 +3,66 @@ package store
 import (
 	"encoding/json"
 	"sync"
+	"time"
 
 	"github.com/lbryio/reflector.go/db"
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
 
-	"github.com/lbryio/lbry.go/extras/errors"
 	log "github.com/sirupsen/logrus"
 )
 
-// DBBackedS3Store is an instance of an S3 Store that is backed by a DB for what is stored.
-type DBBackedS3Store struct {
-	s3        *S3BlobStore
+// DBBackedStore is a store that's backed by a DB. The DB contains data about what's in the store.
+type DBBackedStore struct {
+	blobs        BlobStore
 	db           *db.SQL
 	blockedMu    sync.RWMutex
 	blocked      map[string]bool
+	deleteOnMiss bool
 }
 
-// NewDBBackedS3Store returns an initialized store pointer.
-func NewDBBackedS3Store(s3 *S3BlobStore, db *db.SQL) *DBBackedS3Store {
-	return &DBBackedS3Store{s3: s3, db: db}
+// NewDBBackedStore returns an initialized store pointer.
+func NewDBBackedStore(blobs BlobStore, db *db.SQL, deleteOnMiss bool) *DBBackedStore {
+	return &DBBackedStore{blobs: blobs, db: db, deleteOnMiss: deleteOnMiss}
 }
 
+const nameDBBacked = "db-backed"
+
+// Name is the cache type name
+func (d *DBBackedStore) Name() string { return nameDBBacked }
+
 // Has returns true if the blob is in the store
-func (d *DBBackedS3Store) Has(hash string) (bool, error) {
-	return d.db.HasBlob(hash)
+func (d *DBBackedStore) Has(hash string) (bool, error) {
+	return d.db.HasBlob(hash, false)
 }
 
 // Get gets the blob
-func (d *DBBackedS3Store) Get(hash string) ([]byte, error) {
-	return d.s3.Get(hash)
+func (d *DBBackedStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	has, err := d.db.HasBlob(hash, true)
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), d.Name()), err
+	}
+	if !has {
+		return nil, shared.NewBlobTrace(time.Since(start), d.Name()), ErrBlobNotFound
+	}
+
+	b, stack, err := d.blobs.Get(hash)
+	if d.deleteOnMiss && errors.Is(err, ErrBlobNotFound) {
+		e2 := d.Delete(hash)
+		if e2 != nil {
+			log.Errorf("error while deleting blob from db: %s", errors.FullTrace(err))
+		}
+	}
+
+	return b, stack.Stack(time.Since(start), d.Name()), err
 }
 
 // Put stores the blob in the S3 store and stores the blob information in the DB.
-func (d *DBBackedS3Store) Put(hash string, blob []byte) error {
-	err := d.s3.Put(hash, blob)
+func (d *DBBackedStore) Put(hash string, blob stream.Blob) error {
+	err := d.blobs.Put(hash, blob)
 	if err != nil {
 		return err
 	}
@@ -45,17 +72,17 @@ func (d *DBBackedS3Store) Put(hash string, blob []byte) error {
 
 // PutSD stores the SDBlob in the S3 store. It will return an error if the sd blob is missing the stream hash or if
 // there is an error storing the blob information in the DB.
-func (d *DBBackedS3Store) PutSD(hash string, blob []byte) error {
+func (d *DBBackedStore) PutSD(hash string, blob stream.Blob) error {
 	var blobContents db.SdBlob
 	err := json.Unmarshal(blob, &blobContents)
 	if err != nil {
-		return err
+		return errors.Err(err)
 	}
 	if blobContents.StreamHash == "" {
 		return errors.Err("sd blob is missing stream hash")
 	}
 
-	err = d.s3.PutSD(hash, blob)
+	err = d.blobs.PutSD(hash, blob)
 	if err != nil {
 		return err
 	}
@@ -63,8 +90,8 @@ func (d *DBBackedS3Store) PutSD(hash string, blob []byte) error {
 	return d.db.AddSDBlob(hash, len(blob), blobContents)
 }
 
-func (d *DBBackedS3Store) Delete(hash string) error {
-	err := d.s3.Delete(hash)
+func (d *DBBackedStore) Delete(hash string) error {
+	err := d.blobs.Delete(hash)
 	if err != nil {
 		return err
 	}
@@ -73,7 +100,7 @@ func (d *DBBackedS3Store) Delete(hash string) error {
 }
 
 // Block deletes the blob and prevents it from being uploaded in the future
-func (d *DBBackedS3Store) Block(hash string) error {
+func (d *DBBackedStore) Block(hash string) error {
 	if blocked, err := d.isBlocked(hash); blocked || err != nil {
 		return err
 	}
@@ -85,28 +112,28 @@ func (d *DBBackedS3Store) Block(hash string) error {
 		return err
 	}
 
-	has, err := d.db.HasBlob(hash)
-	if err != nil {
-		return err
-	}
-
-	if has {
-		err = d.s3.Delete(hash)
-		if err != nil {
-			return err
-		}
-
-		err = d.db.Delete(hash)
-		if err != nil {
-			return err
-		}
-	}
+	//has, err := d.db.HasBlob(hash, false)
+	//if err != nil {
+	//	return err
+	//}
+	//
+	//if has {
+	//	err = d.blobs.Delete(hash)
+	//	if err != nil {
+	//		return err
+	//	}
+	//
+	//	err = d.db.Delete(hash)
+	//	if err != nil {
+	//		return err
+	//	}
+	//}
 
 	return d.markBlocked(hash)
 }
 
 // Wants returns false if the hash exists or is blocked, true otherwise
-func (d *DBBackedS3Store) Wants(hash string) (bool, error) {
+func (d *DBBackedStore) Wants(hash string) (bool, error) {
 	blocked, err := d.isBlocked(hash)
 	if blocked || err != nil {
 		return false, err
@@ -119,11 +146,11 @@ func (d *DBBackedS3Store) Wants(hash string) (bool, error) {
 // MissingBlobsForKnownStream returns missing blobs for an existing stream
 // WARNING: if the stream does NOT exist, no blob hashes will be returned, which looks
 // like no blobs are missing
-func (d *DBBackedS3Store) MissingBlobsForKnownStream(sdHash string) ([]string, error) {
+func (d *DBBackedStore) MissingBlobsForKnownStream(sdHash string) ([]string, error) {
 	return d.db.MissingBlobsForKnownStream(sdHash)
 }
 
-func (d *DBBackedS3Store) markBlocked(hash string) error {
+func (d *DBBackedStore) markBlocked(hash string) error {
 	err := d.initBlocked()
 	if err != nil {
 		return err
@@ -136,7 +163,7 @@ func (d *DBBackedS3Store) markBlocked(hash string) error {
 	return nil
 }
 
-func (d *DBBackedS3Store) isBlocked(hash string) (bool, error) {
+func (d *DBBackedStore) isBlocked(hash string) (bool, error) {
 	err := d.initBlocked()
 	if err != nil {
 		return false, err
@@ -148,7 +175,7 @@ func (d *DBBackedS3Store) isBlocked(hash string) (bool, error) {
 	return d.blocked[hash], nil
 }
 
-func (d *DBBackedS3Store) initBlocked() error {
+func (d *DBBackedStore) initBlocked() error {
 	// first check without blocking since this is the most likely scenario
 	if d.blocked != nil {
 		return nil
@@ -167,3 +194,8 @@ func (d *DBBackedS3Store) initBlocked() error {
 
 	return err
 }
+
+// Shutdown shuts down the store gracefully
+func (d *DBBackedStore) Shutdown() {
+	d.blobs.Shutdown()
+}

store/disk.go

@@ -0,0 +1,146 @@
+package store
+
+import (
+	"os"
+	"path"
+	"time"
+
+	"github.com/lbryio/reflector.go/shared"
+	"github.com/lbryio/reflector.go/store/speedwalk"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+)
+
+// DiskStore stores blobs on a local disk
+type DiskStore struct {
+	// the location of blobs on disk
+	blobDir string
+	// store files in subdirectories based on the first N chars in the filename. 0 = don't create subdirectories.
+	prefixLength int
+
+	// true if initOnce ran, false otherwise
+	initialized bool
+}
+
+// NewDiskStore returns an initialized file disk store pointer.
+func NewDiskStore(dir string, prefixLength int) *DiskStore {
+	return &DiskStore{
+		blobDir:      dir,
+		prefixLength: prefixLength,
+	}
+}
+
+const nameDisk = "disk"
+
+// Name is the cache type name
+func (d *DiskStore) Name() string { return nameDisk }
+
+// Has returns T/F or Error if it the blob stored already. It will error with any IO disk error.
+func (d *DiskStore) Has(hash string) (bool, error) {
+	err := d.initOnce()
+	if err != nil {
+		return false, err
+	}
+
+	_, err = os.Stat(d.path(hash))
+	if err != nil {
+		if os.IsNotExist(err) {
+			return false, nil
+		}
+		return false, errors.Err(err)
+	}
+	return true, nil
+}
+
+// Get returns the blob or an error if the blob doesn't exist.
+func (d *DiskStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	err := d.initOnce()
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), d.Name()), err
+	}
+
+	blob, err := os.ReadFile(d.path(hash))
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil, shared.NewBlobTrace(time.Since(start), d.Name()), errors.Err(ErrBlobNotFound)
+		}
+		return nil, shared.NewBlobTrace(time.Since(start), d.Name()), errors.Err(err)
+	}
+	return blob, shared.NewBlobTrace(time.Since(start), d.Name()), nil
+}
+
+// PutSD stores the sd blob on the disk
+func (d *DiskStore) PutSD(hash string, blob stream.Blob) error {
+	return d.Put(hash, blob)
+}
+
+// Delete deletes the blob from the store
+func (d *DiskStore) Delete(hash string) error {
+	err := d.initOnce()
+	if err != nil {
+		return err
+	}
+
+	has, err := d.Has(hash)
+	if err != nil {
+		return err
+	}
+	if !has {
+		return nil
+	}
+
+	err = os.Remove(d.path(hash))
+	return errors.Err(err)
+}
+
+// list returns the hashes of blobs that already exist in the blobDir
+func (d *DiskStore) list() ([]string, error) {
+	err := d.initOnce()
+	if err != nil {
+		return nil, err
+	}
+
+	return speedwalk.AllFiles(d.blobDir, true)
+}
+
+func (d *DiskStore) dir(hash string) string {
+	if d.prefixLength <= 0 || len(hash) < d.prefixLength {
+		return d.blobDir
+	}
+	return path.Join(d.blobDir, hash[:d.prefixLength])
+}
+func (d *DiskStore) tmpDir(hash string) string {
+	return path.Join(d.blobDir, "tmp")
+}
+func (d *DiskStore) path(hash string) string {
+	return path.Join(d.dir(hash), hash)
+}
+func (d *DiskStore) tmpPath(hash string) string {
+	return path.Join(d.tmpDir(hash), hash)
+}
+func (d *DiskStore) ensureDirExists(dir string) error {
+	return errors.Err(os.MkdirAll(dir, 0755))
+}
+
+func (d *DiskStore) initOnce() error {
+	if d.initialized {
+		return nil
+	}
+
+	err := d.ensureDirExists(d.blobDir)
+	if err != nil {
+		return err
+	}
+	err = d.ensureDirExists(path.Join(d.blobDir, "tmp"))
+	if err != nil {
+		return err
+	}
+	d.initialized = true
+	return nil
+}
+
+// Shutdown shuts down the store gracefully
+func (d *DiskStore) Shutdown() {
+}

store/disk_test.go

@@ -0,0 +1,44 @@
+package store
+
+import (
+	"os"
+	"path"
+	"path/filepath"
+	"testing"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestDiskStore_Get(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "reflector_test_*")
+	require.NoError(t, err)
+	defer func() { _ = os.RemoveAll(tmpDir) }()
+	d := NewDiskStore(tmpDir, 2)
+
+	hash := "f428b8265d65dad7f8ffa52922bba836404cbd62f3ecfe10adba6b444f8f658938e54f5981ac4de39644d5b93d89a94b"
+	data := []byte("oyuntyausntoyaunpdoyruoyduanrstjwfjyuwf")
+
+	expectedPath := path.Join(tmpDir, hash[:2], hash)
+	err = os.MkdirAll(filepath.Dir(expectedPath), os.ModePerm)
+	require.NoError(t, err)
+	err = os.WriteFile(expectedPath, data, os.ModePerm)
+	require.NoError(t, err)
+
+	blob, _, err := d.Get(hash)
+	assert.NoError(t, err)
+	assert.EqualValues(t, data, blob)
+}
+
+func TestDiskStore_GetNonexistentBlob(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "reflector_test_*")
+	require.NoError(t, err)
+	defer func() { _ = os.RemoveAll(tmpDir) }()
+	d := NewDiskStore(tmpDir, 2)
+
+	blob, _, err := d.Get("nonexistent")
+	assert.Nil(t, blob)
+	assert.True(t, errors.Is(err, ErrBlobNotFound))
+}

store/diskstore_put_darwin.go

@@ -0,0 +1,42 @@
+//go:build darwin
+// +build darwin
+
+package store
+
+import (
+	"bytes"
+	"io"
+	"os"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+)
+
+var openFileFlags = os.O_WRONLY | os.O_CREATE
+
+// Put stores the blob on disk
+func (d *DiskStore) Put(hash string, blob stream.Blob) error {
+	err := d.initOnce()
+	if err != nil {
+		return err
+	}
+
+	err = d.ensureDirExists(d.dir(hash))
+	if err != nil {
+		return err
+	}
+
+	// Open file with O_DIRECT
+	f, err := os.OpenFile(d.tmpPath(hash), openFileFlags, 0644)
+	if err != nil {
+		return errors.Err(err)
+	}
+	defer f.Close()
+
+	_, err = io.Copy(f, bytes.NewReader(blob))
+	if err != nil {
+		return errors.Err(err)
+	}
+	err = os.Rename(d.tmpPath(hash), d.path(hash))
+	return errors.Err(err)
+}

store/diskstore_put_linux.go

@@ -0,0 +1,49 @@
+//go:build linux
+// +build linux
+
+package store
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"syscall"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	"github.com/brk0v/directio"
+)
+
+var openFileFlags = os.O_WRONLY | os.O_CREATE | syscall.O_DIRECT
+
+// Put stores the blob on disk
+func (d *DiskStore) Put(hash string, blob stream.Blob) error {
+	err := d.initOnce()
+	if err != nil {
+		return err
+	}
+
+	err = d.ensureDirExists(d.dir(hash))
+	if err != nil {
+		return err
+	}
+
+	// Open file with O_DIRECT
+	f, err := os.OpenFile(d.tmpPath(hash), openFileFlags, 0644)
+	if err != nil {
+		return errors.Err(err)
+	}
+	defer func() { _ = f.Close() }()
+	dio, err := directio.New(f)
+	if err != nil {
+		return errors.Err(err)
+	}
+	defer func() { _ = dio.Flush() }()
+	_, err = io.Copy(dio, bytes.NewReader(blob))
+	if err != nil {
+		return errors.Err(err)
+	}
+	err = os.Rename(d.tmpPath(hash), d.path(hash))
+	return errors.Err(err)
+}

store/file.go

@@ -1,115 +0,0 @@
-package store
-
-import (
-	"io/ioutil"
-	"os"
-	"path"
-
-	"github.com/lbryio/lbry.go/extras/errors"
-)
-
-// FileBlobStore is a local disk store.
-type FileBlobStore struct {
-	dir string
-
-	initialized bool
-}
-
-// NewFileBlobStore returns an initialized file disk store pointer.
-func NewFileBlobStore(dir string) *FileBlobStore {
-	return &FileBlobStore{dir: dir}
-}
-
-func (f *FileBlobStore) path(hash string) string {
-	return path.Join(f.dir, hash)
-}
-
-func (f *FileBlobStore) initOnce() error {
-	if f.initialized {
-		return nil
-	}
-
-	if stat, err := os.Stat(f.dir); err != nil {
-		if os.IsNotExist(err) {
-			err2 := os.Mkdir(f.dir, 0755)
-			if err2 != nil {
-				return err2
-			}
-		} else {
-			return err
-		}
-	} else if !stat.IsDir() {
-		return errors.Err("blob dir exists but is not a dir")
-	}
-
-	f.initialized = true
-	return nil
-}
-
-// Has returns T/F or Error if it the blob stored already. It will error with any IO disk error.
-func (f *FileBlobStore) Has(hash string) (bool, error) {
-	err := f.initOnce()
-	if err != nil {
-		return false, err
-	}
-
-	_, err = os.Stat(f.path(hash))
-	if err != nil {
-		if os.IsNotExist(err) {
-			return false, nil
-		}
-		return false, err
-	}
-	return true, nil
-}
-
-// Get returns the byte slice of the blob stored or will error if the blob doesn't exist.
-func (f *FileBlobStore) Get(hash string) ([]byte, error) {
-	err := f.initOnce()
-	if err != nil {
-		return []byte{}, err
-	}
-
-	file, err := os.Open(f.path(hash))
-	if err != nil {
-		if os.IsNotExist(err) {
-			return []byte{}, errors.Err(ErrBlobNotFound)
-		}
-		return []byte{}, err
-	}
-
-	return ioutil.ReadAll(file)
-}
-
-// Put stores the blob on disk
-func (f *FileBlobStore) Put(hash string, blob []byte) error {
-	err := f.initOnce()
-	if err != nil {
-		return err
-	}
-
-	return ioutil.WriteFile(f.path(hash), blob, 0644)
-}
-
-// PutSD stores the sd blob on the disk
-func (f *FileBlobStore) PutSD(hash string, blob []byte) error {
-	return f.Put(hash, blob)
-}
-
-// Delete deletes the blob from the store
-func (f *FileBlobStore) Delete(hash string) error {
-	err := f.initOnce()
-	if err != nil {
-		return err
-	}
-
-	has, err := f.Has(hash)
-	if err != nil {
-		return err
-	}
-	if !has {
-		return nil
-	}
-
-	return os.Remove(f.path(hash))
-}

store/gcache.go

@@ -0,0 +1,163 @@
+package store
+
+import (
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	"github.com/bluele/gcache"
+	"github.com/sirupsen/logrus"
+)
+
+// GcacheStore adds a max cache size and Greedy-Dual-Size-Frequency cache eviction strategy to a BlobStore
+type GcacheStore struct {
+	// underlying store
+	store BlobStore
+	// cache implementation
+	cache gcache.Cache
+}
+type EvictionStrategy int
+
+const (
+	//LFU Discards the least frequently used items first.
+	LFU EvictionStrategy = iota
+	//ARC Constantly balances between LRU and LFU, to improve the combined result.
+	ARC
+	//LRU Discards the least recently used items first.
+	LRU
+	//SIMPLE has no clear priority for evict cache. It depends on key-value map order.
+	SIMPLE
+)
+
+// NewGcacheStore initialize a new LRUStore
+func NewGcacheStore(component string, store BlobStore, maxSize int, strategy EvictionStrategy) *GcacheStore {
+	cacheBuilder := gcache.New(maxSize)
+	var cache gcache.Cache
+	evictFunc := func(key interface{}, value interface{}) {
+		logrus.Infof("evicting %s", key)
+		metrics.CacheLRUEvictCount.With(metrics.CacheLabels(store.Name(), component)).Inc()
+		_ = store.Delete(key.(string)) // TODO: log this error. may happen if underlying entry is gone but cache entry still there
+	}
+	switch strategy {
+	case LFU:
+		cache = cacheBuilder.LFU().EvictedFunc(evictFunc).Build()
+	case ARC:
+		cache = cacheBuilder.ARC().EvictedFunc(evictFunc).Build()
+	case LRU:
+		cache = cacheBuilder.LRU().EvictedFunc(evictFunc).Build()
+	case SIMPLE:
+		cache = cacheBuilder.Simple().EvictedFunc(evictFunc).Build()
+
+	}
+	l := &GcacheStore{
+		store: store,
+		cache: cache,
+	}
+	go func() {
+		if lstr, ok := store.(lister); ok {
+			err := l.loadExisting(lstr, maxSize)
+			if err != nil {
+				panic(err) // TODO: what should happen here? panic? return nil? just keep going?
+			}
+		}
+	}()
+
+	return l
+}
+
+const nameGcache = "gcache"
+
+// Name is the cache type name
+func (l *GcacheStore) Name() string { return nameGcache }
+
+// Has returns whether the blob is in the store, without updating the recent-ness.
+func (l *GcacheStore) Has(hash string) (bool, error) {
+	return l.cache.Has(hash), nil
+}
+
+// Get returns the blob or an error if the blob doesn't exist.
+func (l *GcacheStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	_, err := l.cache.Get(hash)
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), l.Name()), errors.Err(ErrBlobNotFound)
+	}
+	blob, stack, err := l.store.Get(hash)
+	if errors.Is(err, ErrBlobNotFound) {
+		// Blob disappeared from underlying store
+		l.cache.Remove(hash)
+	}
+	return blob, stack.Stack(time.Since(start), l.Name()), err
+}
+
+// Put stores the blob. Following LFUDA rules it's not guaranteed that a SET will store the value!!!
+func (l *GcacheStore) Put(hash string, blob stream.Blob) error {
+	_ = l.cache.Set(hash, true)
+	has, _ := l.Has(hash)
+	if has {
+		err := l.store.Put(hash, blob)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// PutSD stores the sd blob. Following LFUDA rules it's not guaranteed that a SET will store the value!!!
+func (l *GcacheStore) PutSD(hash string, blob stream.Blob) error {
+	_ = l.cache.Set(hash, true)
+	has, _ := l.Has(hash)
+	if has {
+		err := l.store.PutSD(hash, blob)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Delete deletes the blob from the store
+func (l *GcacheStore) Delete(hash string) error {
+	err := l.store.Delete(hash)
+	if err != nil {
+		return err
+	}
+
+	// This must come after store.Delete()
+	// Remove triggers onEvict function, which also tries to delete blob from store
+	// We need to delete it manually first so any errors can be propagated up
+	l.cache.Remove(hash)
+	return nil
+}
+
+// loadExisting imports existing blobs from the underlying store into the LRU cache
+func (l *GcacheStore) loadExisting(store lister, maxItems int) error {
+	logrus.Infof("loading at most %d items", maxItems)
+	existing, err := store.list()
+	if err != nil {
+		return err
+	}
+	logrus.Infof("read %d files from underlying store", len(existing))
+
+	added := 0
+	for i, h := range existing {
+		_ = l.cache.Set(h, true)
+		added++
+		if maxItems > 0 && added >= maxItems { // underlying cache is bigger than the cache
+			err := l.Delete(h)
+			logrus.Infof("deleted overflowing blob: %s (%d/%d)", h, i, len(existing))
+			if err != nil {
+				logrus.Warnf("error while deleting a blob that's overflowing the cache: %s", err.Error())
+			}
+		}
+	}
+	return nil
+}
+
+// Shutdown shuts down the store gracefully
+func (l *GcacheStore) Shutdown() {
+}

store/gcache_test.go

@@ -0,0 +1,110 @@
+package store
+
+import (
+	"fmt"
+	"os"
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const cacheMaxSize = 3
+
+func getTestGcacheStore() (*GcacheStore, *MemStore) {
+	m := NewMemStore()
+	return NewGcacheStore("test", m, cacheMaxSize, LFU), m
+}
+
+func TestGcacheStore_Eviction(t *testing.T) {
+	lfu, mem := getTestGcacheStore()
+	b := []byte("x")
+	for i := 0; i < 3; i++ {
+		err := lfu.Put(fmt.Sprintf("%d", i), b)
+		require.NoError(t, err)
+		for j := 0; j < 3-i; j++ {
+			_, _, err = lfu.Get(fmt.Sprintf("%d", i))
+			require.NoError(t, err)
+		}
+	}
+	for k, v := range map[string]bool{
+		"0": true,
+		"1": true,
+		"2": true,
+	} {
+		has, err := lfu.Has(k)
+		assert.NoError(t, err)
+		assert.Equal(t, v, has)
+	}
+	err := lfu.Put("3", b)
+	require.NoError(t, err)
+	for k, v := range map[string]bool{
+		"0": true,
+		"1": true,
+		"2": false,
+		"3": true,
+	} {
+		has, err := lfu.Has(k)
+		assert.NoError(t, err)
+		assert.Equal(t, v, has)
+	}
+	assert.Equal(t, cacheMaxSize, len(mem.Debug()))
+
+	err = lfu.Delete("0")
+	assert.NoError(t, err)
+	err = lfu.Delete("1")
+	assert.NoError(t, err)
+	err = lfu.Delete("3")
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(mem.Debug()))
+}
+
+func TestGcacheStore_UnderlyingBlobMissing(t *testing.T) {
+	lfu, mem := getTestGcacheStore()
+	hash := "hash"
+	b := []byte("this is a blob of stuff")
+	err := lfu.Put(hash, b)
+	require.NoError(t, err)
+
+	err = mem.Delete(hash)
+	require.NoError(t, err)
+
+	// hash still exists in lru
+	assert.True(t, lfu.cache.Has(hash))
+
+	blob, _, err := lfu.Get(hash)
+	assert.Nil(t, blob)
+	assert.True(t, errors.Is(err, ErrBlobNotFound), "expected (%s) %s, got (%s) %s",
+		reflect.TypeOf(ErrBlobNotFound).String(), ErrBlobNotFound.Error(),
+		reflect.TypeOf(err).String(), err.Error())
+
+	// lru.Get() removes hash if underlying store doesn't have it
+	assert.False(t, lfu.cache.Has(hash))
+}
+
+func TestGcacheStore_loadExisting(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "reflector_test_*")
+	require.NoError(t, err)
+	defer func() { _ = os.RemoveAll(tmpDir) }()
+	d := NewDiskStore(tmpDir, 2)
+
+	hash := "hash"
+	b := []byte("this is a blob of stuff")
+	err = d.Put(hash, b)
+	require.NoError(t, err)
+
+	existing, err := d.list()
+	require.NoError(t, err)
+	require.Equal(t, 1, len(existing), "blob should exist in cache")
+	assert.Equal(t, hash, existing[0])
+
+	lfu := NewGcacheStore("test", d, 3, LFU) // lru should load existing blobs when it's created
+	time.Sleep(100 * time.Millisecond)       // async load so let's wait...
+	has, err := lfu.Has(hash)
+	require.NoError(t, err)
+	assert.True(t, has, "hash should be loaded from disk store but it's not")
+}

store/http.go

@@ -0,0 +1,170 @@
+package store
+
+import (
+	"bytes"
+	"context"
+	"io"
+	"net"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+)
+
+// HttpStore is a store that works on top of the HTTP protocol
+type HttpStore struct {
+	upstream   string
+	httpClient *http.Client
+	edgeToken  string
+}
+
+func NewHttpStore(upstream, edgeToken string) *HttpStore {
+	return &HttpStore{
+		upstream:   "http://" + upstream,
+		httpClient: getClient(),
+		edgeToken:  edgeToken,
+	}
+}
+
+const nameHttp = "http"
+
+func (n *HttpStore) Name() string { return nameHttp }
+func (n *HttpStore) Has(hash string) (bool, error) {
+	url := n.upstream + "/blob?hash=" + hash
+
+	req, err := http.NewRequest("HEAD", url, nil)
+	if err != nil {
+		return false, errors.Err(err)
+	}
+
+	res, err := n.httpClient.Do(req)
+	if err != nil {
+		return false, errors.Err(err)
+	}
+	defer func() { _ = res.Body.Close() }()
+	if res.StatusCode == http.StatusNotFound {
+		return false, nil
+	}
+	if res.StatusCode == http.StatusNoContent {
+		return true, nil
+	}
+	var body []byte
+	if res.Body != nil {
+		body, _ = io.ReadAll(res.Body)
+	}
+	return false, errors.Err("upstream error. Status code: %d (%s)", res.StatusCode, string(body))
+}
+
+func (n *HttpStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	url := n.upstream + "/blob?hash=" + hash
+	if n.edgeToken != "" {
+		url += "&edge_token=" + n.edgeToken
+	}
+
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), n.Name()), errors.Err(err)
+	}
+
+	res, err := n.httpClient.Do(req)
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), n.Name()), errors.Err(err)
+	}
+	defer func() { _ = res.Body.Close() }()
+	tmp := getBuffer()
+	defer putBuffer(tmp)
+	serialized := res.Header.Get("Via")
+	trace := shared.NewBlobTrace(time.Since(start), n.Name())
+	if serialized != "" {
+		parsedTrace, err := shared.Deserialize(serialized)
+		if err != nil {
+			return nil, shared.NewBlobTrace(time.Since(start), n.Name()), err
+		}
+		trace = *parsedTrace
+	}
+
+	if res.StatusCode == http.StatusNotFound {
+		return nil, trace.Stack(time.Since(start), n.Name()), ErrBlobNotFound
+	}
+	if res.StatusCode == http.StatusOK {
+		written, err := io.Copy(tmp, res.Body)
+		if err != nil {
+			return nil, trace.Stack(time.Since(start), n.Name()), errors.Err(err)
+		}
+
+		blob := make([]byte, written)
+		copy(blob, tmp.Bytes())
+		metrics.MtrInBytesHttp.Add(float64(len(blob)))
+		return blob, trace.Stack(time.Since(start), n.Name()), nil
+	}
+	var body []byte
+	if res.Body != nil {
+		body, _ = io.ReadAll(res.Body)
+	}
+
+	return nil, trace.Stack(time.Since(start), n.Name()), errors.Err("upstream error. Status code: %d (%s)", res.StatusCode, string(body))
+}
+
+func (n *HttpStore) Put(string, stream.Blob) error {
+	return shared.ErrNotImplemented
+}
+func (n *HttpStore) PutSD(string, stream.Blob) error {
+	return shared.ErrNotImplemented
+}
+func (n *HttpStore) Delete(string) error {
+	return shared.ErrNotImplemented
+}
+func (n *HttpStore) Shutdown() {}
+
+// buffer pool to reduce GC
+// https://www.captaincodeman.com/2017/06/02/golang-buffer-pool-gotcha
+var buffers = sync.Pool{
+	// New is called when a new instance is needed
+	New: func() interface{} {
+		buf := make([]byte, 0, stream.MaxBlobSize)
+		return bytes.NewBuffer(buf)
+	},
+}
+
+// getBuffer fetches a buffer from the pool
+func getBuffer() *bytes.Buffer {
+	return buffers.Get().(*bytes.Buffer)
+}
+
+// putBuffer returns a buffer to the pool
+func putBuffer(buf *bytes.Buffer) {
+	buf.Reset()
+	buffers.Put(buf)
+}
+
+func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	dialer := &net.Dialer{
+		Timeout:   30 * time.Second,
+		KeepAlive: 30 * time.Second,
+	}
+	return dialer.DialContext(ctx, network, address)
+}
+
+// getClient gets an http client that's customized to be more performant when dealing with blobs of 2MB in size (most of our blobs)
+func getClient() *http.Client {
+	// Customize the Transport to have larger connection pool
+	defaultTransport := &http.Transport{
+		DialContext:           dialContext,
+		ForceAttemptHTTP2:     true,
+		MaxIdleConns:          100,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+		DisableCompression:    true,
+		MaxIdleConnsPerHost:   100,
+		ReadBufferSize:        stream.MaxBlobSize + 1024*10, //add an extra few KBs to make sure it fits the extra information
+	}
+
+	return &http.Client{Transport: defaultTransport}
+}

store/ittt.go

@@ -0,0 +1,73 @@
+package store
+
+import (
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+)
+
+// ITTTStore performs an operation on this storage, if this fails, it attempts to run it on that
+type ITTTStore struct {
+	this, that BlobStore
+}
+
+// NewITTTStore returns a new instance of the IF THIS THAN THAT store
+func NewITTTStore(this, that BlobStore) *ITTTStore {
+	return &ITTTStore{
+		this: this,
+		that: that,
+	}
+}
+
+const nameIttt = "ittt"
+
+// Name is the cache type name
+func (c *ITTTStore) Name() string { return nameIttt }
+
+// Has checks in this for a hash, if it fails it checks in that. It returns true if either store has it.
+func (c *ITTTStore) Has(hash string) (bool, error) {
+	has, err := c.this.Has(hash)
+	if err != nil || !has {
+		has, err = c.that.Has(hash)
+	}
+	return has, err
+}
+
+// Get tries to get the blob from this first, falling back to that.
+func (c *ITTTStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	blob, trace, err := c.this.Get(hash)
+	if err == nil {
+		metrics.ThisHitCount.Inc()
+		return blob, trace.Stack(time.Since(start), c.Name()), err
+	}
+
+	blob, trace, err = c.that.Get(hash)
+	if err != nil {
+		return nil, trace.Stack(time.Since(start), c.Name()), err
+	}
+	metrics.ThatHitCount.Inc()
+	return blob, trace.Stack(time.Since(start), c.Name()), nil
+}
+
+// Put not implemented
+func (c *ITTTStore) Put(hash string, blob stream.Blob) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// PutSD not implemented
+func (c *ITTTStore) PutSD(hash string, blob stream.Blob) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Delete not implemented
+func (c *ITTTStore) Delete(hash string) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Shutdown shuts down the store gracefully
+func (c *ITTTStore) Shutdown() {}

store/memory.go

@@ -1,54 +1,80 @@
 package store
 
-import "github.com/lbryio/lbry.go/extras/errors"
+import (
+	"sync"
+	"time"
 
-// MemoryBlobStore is an in memory only blob store with no persistence.
-type MemoryBlobStore struct {
-	blobs map[string][]byte
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+)
+
+// MemStore is an in memory only blob store with no persistence.
+type MemStore struct {
+	blobs map[string]stream.Blob
+	mu    *sync.RWMutex
 }
 
+func NewMemStore() *MemStore {
+	return &MemStore{
+		blobs: make(map[string]stream.Blob),
+		mu:    &sync.RWMutex{},
+	}
+}
+
+const nameMem = "mem"
+
+// Name is the cache type name
+func (m *MemStore) Name() string { return nameMem }
+
 // Has returns T/F if the blob is currently stored. It will never error.
-func (m *MemoryBlobStore) Has(hash string) (bool, error) {
-	if m.blobs == nil {
-		m.blobs = make(map[string][]byte)
-	}
+func (m *MemStore) Has(hash string) (bool, error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
 	_, ok := m.blobs[hash]
 	return ok, nil
 }
 
 // Get returns the blob byte slice if present and errors if the blob is not found.
-func (m *MemoryBlobStore) Get(hash string) ([]byte, error) {
-	if m.blobs == nil {
-		m.blobs = make(map[string][]byte)
-	}
+func (m *MemStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	m.mu.RLock()
+	defer m.mu.RUnlock()
 	blob, ok := m.blobs[hash]
 	if !ok {
-		return []byte{}, errors.Err(ErrBlobNotFound)
+		return nil, shared.NewBlobTrace(time.Since(start), m.Name()), errors.Err(ErrBlobNotFound)
 	}
-	return blob, nil
+	return blob, shared.NewBlobTrace(time.Since(start), m.Name()), nil
 }
 
 // Put stores the blob in memory
-func (m *MemoryBlobStore) Put(hash string, blob []byte) error {
-	if m.blobs == nil {
-		m.blobs = make(map[string][]byte)
-	}
+func (m *MemStore) Put(hash string, blob stream.Blob) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
 	m.blobs[hash] = blob
 	return nil
 }
 
 // PutSD stores the sd blob in memory
-func (m *MemoryBlobStore) PutSD(hash string, blob []byte) error {
+func (m *MemStore) PutSD(hash string, blob stream.Blob) error {
 	return m.Put(hash, blob)
 }
 
 // Delete deletes the blob from the store
-func (m *MemoryBlobStore) Delete(hash string) error {
+func (m *MemStore) Delete(hash string) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
 	delete(m.blobs, hash)
 	return nil
 }
 
 // Debug returns the blobs in memory. It's useful for testing and debugging.
-func (m *MemoryBlobStore) Debug() map[string][]byte {
+func (m *MemStore) Debug() map[string]stream.Blob {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
 	return m.blobs
 }
+
+// Shutdown shuts down the store gracefully
+func (m *MemStore) Shutdown() {}

store/memory_test.go

@@ -4,11 +4,11 @@ import (
 	"bytes"
 	"testing"
 
-	"github.com/lbryio/lbry.go/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
 )
 
-func TestMemoryBlobStore_Put(t *testing.T) {
-	s := MemoryBlobStore{}
+func TestMemStore_Put(t *testing.T) {
+	s := NewMemStore()
 	blob := []byte("abcdefg")
 	err := s.Put("abc", blob)
 	if err != nil {
@@ -16,8 +16,8 @@ func TestMemoryBlobStore_Put(t *testing.T) {
 	}
 }
 
-func TestMemoryBlobStore_Get(t *testing.T) {
-	s := MemoryBlobStore{}
+func TestMemStore_Get(t *testing.T) {
+	s := NewMemStore()
 	hash := "abc"
 	blob := []byte("abcdefg")
 	err := s.Put(hash, blob)
@@ -25,7 +25,7 @@ func TestMemoryBlobStore_Get(t *testing.T) {
 		t.Error("error getting memory blob - ", err)
 	}
 
-	gotBlob, err := s.Get(hash)
+	gotBlob, _, err := s.Get(hash)
 	if err != nil {
 		t.Errorf("Expected no error, got %v", err)
 	}
@@ -33,7 +33,7 @@ func TestMemoryBlobStore_Get(t *testing.T) {
 		t.Error("Got blob that is different from expected blob")
 	}
 
-	missingBlob, err := s.Get("nonexistent hash")
+	missingBlob, _, err := s.Get("nonexistent hash")
 	if err == nil {
 		t.Errorf("Expected ErrBlobNotFound, got nil")
 	}

store/noop.go

@@ -0,0 +1,24 @@
+package store
+
+import (
+	"time"
+
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/stream"
+)
+
+// NoopStore is a store that does nothing
+type NoopStore struct{}
+
+const nameNoop = "noop"
+
+func (n *NoopStore) Name() string               { return nameNoop }
+func (n *NoopStore) Has(_ string) (bool, error) { return false, nil }
+func (n *NoopStore) Get(_ string) (stream.Blob, shared.BlobTrace, error) {
+	return nil, shared.NewBlobTrace(time.Since(time.Now()), n.Name()), nil
+}
+func (n *NoopStore) Put(_ string, _ stream.Blob) error   { return nil }
+func (n *NoopStore) PutSD(_ string, _ stream.Blob) error { return nil }
+func (n *NoopStore) Delete(_ string) error               { return nil }
+func (n *NoopStore) Shutdown()                           { return }

store/s3.go

@@ -5,7 +5,11 @@ import (
 	"net/http"
 	"time"
 
-	"github.com/lbryio/lbry.go/extras/errors"
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
 
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/aws/awserr"
@@ -16,45 +20,35 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
-// S3BlobStore is an S3 store
-type S3BlobStore struct {
+// S3Store is an S3 store
+type S3Store struct {
 	awsID     string
 	awsSecret string
 	region    string
 	bucket    string
+	endpoint  string
 
 	session *session.Session
 }
 
-// NewS3BlobStore returns an initialized S3 store pointer.
-func NewS3BlobStore(awsID, awsSecret, region, bucket string) *S3BlobStore {
-	return &S3BlobStore{
+// NewS3Store returns an initialized S3 store pointer.
+func NewS3Store(awsID, awsSecret, region, bucket, endpoint string) *S3Store {
+	return &S3Store{
 		awsID:     awsID,
 		awsSecret: awsSecret,
 		region:    region,
 		bucket:    bucket,
+		endpoint:  endpoint,
 	}
 }
 
-func (s *S3BlobStore) initOnce() error {
-	if s.session != nil {
-		return nil
-	}
+const nameS3 = "s3"
 
-	sess, err := session.NewSession(&aws.Config{
-		Credentials: credentials.NewStaticCredentials(s.awsID, s.awsSecret, ""),
-		Region:      aws.String(s.region),
-	})
-	if err != nil {
-		return err
-	}
-
-	s.session = sess
-	return nil
-}
+// Name is the cache type name
+func (s *S3Store) Name() string { return nameS3 }
 
 // Has returns T/F or Error ( from S3 ) if the store contains the blob.
-func (s *S3BlobStore) Has(hash string) (bool, error) {
+func (s *S3Store) Has(hash string) (bool, error) {
 	err := s.initOnce()
 	if err != nil {
 		return false, err
@@ -75,17 +69,18 @@ func (s *S3BlobStore) Has(hash string) (bool, error) {
 }
 
 // Get returns the blob slice if present or errors on S3.
-func (s *S3BlobStore) Get(hash string) ([]byte, error) {
+func (s *S3Store) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
 	//Todo-Need to handle error for blob doesn't exist for consistency.
 	err := s.initOnce()
 	if err != nil {
-		return []byte{}, err
+		return nil, shared.NewBlobTrace(time.Since(start), s.Name()), err
 	}
 
 	log.Debugf("Getting %s from S3", hash[:8])
 	defer func(t time.Time) {
 		log.Debugf("Getting %s from S3 took %s", hash[:8], time.Since(t).String())
-	}(time.Now())
+	}(start)
 
 	buf := &aws.WriteAtBuffer{}
 	_, err = s3manager.NewDownloader(s.session).Download(buf, &s3.GetObjectInput{
@@ -96,19 +91,19 @@ func (s *S3BlobStore) Get(hash string) ([]byte, error) {
 		if aerr, ok := err.(awserr.Error); ok {
 			switch aerr.Code() {
 			case s3.ErrCodeNoSuchBucket:
-				return []byte{}, errors.Err("bucket %s does not exist", s.bucket)
+				return nil, shared.NewBlobTrace(time.Since(start), s.Name()), errors.Err("bucket %s does not exist", s.bucket)
 			case s3.ErrCodeNoSuchKey:
-				return []byte{}, errors.Err(ErrBlobNotFound)
+				return nil, shared.NewBlobTrace(time.Since(start), s.Name()), errors.Err(ErrBlobNotFound)
 			}
 		}
-		return buf.Bytes(), err
+		return buf.Bytes(), shared.NewBlobTrace(time.Since(start), s.Name()), err
 	}
 
-	return buf.Bytes(), nil
+	return buf.Bytes(), shared.NewBlobTrace(time.Since(start), s.Name()), nil
 }
 
 // Put stores the blob on S3 or errors if S3 connection errors.
-func (s *S3BlobStore) Put(hash string, blob []byte) error {
+func (s *S3Store) Put(hash string, blob stream.Blob) error {
 	err := s.initOnce()
 	if err != nil {
 		return err
@@ -123,19 +118,21 @@ func (s *S3BlobStore) Put(hash string, blob []byte) error {
 		Bucket: aws.String(s.bucket),
 		Key:    aws.String(hash),
 		Body:   bytes.NewBuffer(blob),
-		StorageClass: aws.String(s3.StorageClassIntelligentTiering),
+		ACL:    aws.String("public-read"),
+		//StorageClass: aws.String(s3.StorageClassIntelligentTiering),
 	})
+	metrics.MtrOutBytesReflector.Add(float64(blob.Size()))
 
 	return err
 }
 
 // PutSD stores the sd blob on S3 or errors if S3 connection errors.
-func (s *S3BlobStore) PutSD(hash string, blob []byte) error {
+func (s *S3Store) PutSD(hash string, blob stream.Blob) error {
 	//Todo - handle missing stream for consistency
 	return s.Put(hash, blob)
 }
 
-func (s *S3BlobStore) Delete(hash string) error {
+func (s *S3Store) Delete(hash string) error {
 	err := s.initOnce()
 	if err != nil {
 		return err
@@ -150,3 +147,26 @@ func (s *S3BlobStore) Delete(hash string) error {
 
 	return err
 }
+
+func (s *S3Store) initOnce() error {
+	if s.session != nil {
+		return nil
+	}
+
+	sess, err := session.NewSession(&aws.Config{
+		Credentials: credentials.NewStaticCredentials(s.awsID, s.awsSecret, ""),
+		Region:      aws.String(s.region),
+		Endpoint:    aws.String(s.endpoint),
+	})
+	if err != nil {
+		return err
+	}
+
+	s.session = sess
+	return nil
+}
+
+// Shutdown shuts down the store gracefully
+func (s *S3Store) Shutdown() {
+	return
+}

store/singleflight.go

@@ -0,0 +1,128 @@
+package store
+
+import (
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	"golang.org/x/sync/singleflight"
+)
+
+func WithSingleFlight(component string, origin BlobStore) BlobStore {
+	return &singleflightStore{
+		BlobStore: origin,
+		component: component,
+		sf:        new(singleflight.Group),
+	}
+}
+
+type singleflightStore struct {
+	BlobStore
+
+	component string
+	sf        *singleflight.Group
+}
+
+func (s *singleflightStore) Name() string {
+	return "sf_" + s.BlobStore.Name()
+}
+
+type getterResponse struct {
+	blob  stream.Blob
+	stack shared.BlobTrace
+}
+
+// Get ensures that only one request per hash is sent to the origin at a time,
+// thereby protecting against https://en.wikipedia.org/wiki/Thundering_herd_problem
+func (s *singleflightStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	metrics.CacheWaitingRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Inc()
+	defer metrics.CacheWaitingRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Dec()
+
+	gr, err, _ := s.sf.Do(hash, s.getter(hash))
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), s.Name()), err
+	}
+	if gr == nil {
+		return nil, shared.NewBlobTrace(time.Since(start), s.Name()), errors.Err("getter response is nil")
+	}
+	rsp := gr.(getterResponse)
+	return rsp.blob, rsp.stack, nil
+}
+
+// getter returns a function that gets a blob from the origin
+// only one getter per hash will be executing at a time
+func (s *singleflightStore) getter(hash string) func() (interface{}, error) {
+	return func() (interface{}, error) {
+		metrics.CacheOriginRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Inc()
+		defer metrics.CacheOriginRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Dec()
+
+		start := time.Now()
+		blob, stack, err := s.BlobStore.Get(hash)
+		if err != nil {
+			return getterResponse{
+				blob:  nil,
+				stack: stack.Stack(time.Since(start), s.Name()),
+			}, err
+		}
+
+		rate := float64(len(blob)) / 1024 / 1024 / time.Since(start).Seconds()
+		metrics.CacheRetrievalSpeed.With(map[string]string{
+			metrics.LabelCacheType: s.Name(),
+			metrics.LabelComponent: s.component,
+			metrics.LabelSource:    "origin",
+		}).Set(rate)
+
+		return getterResponse{
+			blob:  blob,
+			stack: stack.Stack(time.Since(start), s.Name()),
+		}, nil
+	}
+}
+
+// Put ensures that only one request per hash is sent to the origin at a time,
+// thereby protecting against https://en.wikipedia.org/wiki/Thundering_herd_problem
+func (s *singleflightStore) Put(hash string, blob stream.Blob) error {
+	metrics.CacheWaitingRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Inc()
+	defer metrics.CacheWaitingRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Dec()
+
+	_, err, _ := s.sf.Do(hash, s.putter(hash, blob))
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// putter returns a function that puts a blob from the origin
+// only one putter per hash will be executing at a time
+func (s *singleflightStore) putter(hash string, blob stream.Blob) func() (interface{}, error) {
+	return func() (interface{}, error) {
+		metrics.CacheOriginRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Inc()
+		defer metrics.CacheOriginRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Dec()
+
+		start := time.Now()
+		err := s.BlobStore.Put(hash, blob)
+		if err != nil {
+			return nil, err
+		}
+
+		rate := float64(len(blob)) / 1024 / 1024 / time.Since(start).Seconds()
+		metrics.CacheRetrievalSpeed.With(map[string]string{
+			metrics.LabelCacheType: s.Name(),
+			metrics.LabelComponent: s.component,
+			metrics.LabelSource:    "origin",
+		}).Set(rate)
+
+		return nil, nil
+	}
+}
+
+// Shutdown shuts down the store gracefully
+func (s *singleflightStore) Shutdown() {
+	s.BlobStore.Shutdown()
+	return
+}

store/speedwalk/speedwalk.go

@@ -0,0 +1,103 @@
+package speedwalk
+
+import (
+	"io/fs"
+	"os"
+	"path/filepath"
+	"runtime"
+	"sync"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+
+	"github.com/karrick/godirwalk"
+	"github.com/sirupsen/logrus"
+)
+
+// AllFiles recursively lists every file in every subdirectory of a given directory
+// If basename is true, return the basename of each file. Otherwise return the full path starting at startDir.
+func AllFiles(startDir string, basename bool) ([]string, error) {
+	entries, err := os.ReadDir(startDir)
+	if err != nil {
+		return nil, err
+	}
+	items := make([]fs.FileInfo, 0, len(entries))
+	for _, entry := range entries {
+		info, err := entry.Info()
+		if err != nil {
+			return nil, err
+		}
+		items = append(items, info)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	pathChan := make(chan string)
+	paths := make([]string, 0, 1000)
+	pathWG := &sync.WaitGroup{}
+	pathWG.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("speedwalk", "worker").Inc()
+	go func() {
+		defer pathWG.Done()
+		for {
+			path, ok := <-pathChan
+			if !ok {
+				return
+			}
+			paths = append(paths, path)
+		}
+	}()
+
+	maxThreads := runtime.NumCPU() - 1
+	goroutineLimiter := make(chan struct{}, maxThreads)
+	for i := 0; i < maxThreads; i++ {
+		goroutineLimiter <- struct{}{}
+	}
+
+	walkerWG := &sync.WaitGroup{}
+	for _, item := range items {
+		if !item.IsDir() {
+			if basename {
+				pathChan <- item.Name()
+			} else {
+				pathChan <- filepath.Join(startDir, item.Name())
+			}
+			continue
+		}
+
+		<-goroutineLimiter
+		walkerWG.Add(1)
+
+		go func(dir string) {
+			defer func() {
+				walkerWG.Done()
+				goroutineLimiter <- struct{}{}
+			}()
+			err = godirwalk.Walk(filepath.Join(startDir, dir), &godirwalk.Options{
+				Unsorted: true, // faster this way
+				Callback: func(osPathname string, de *godirwalk.Dirent) error {
+					if de.IsRegular() {
+						if basename {
+							pathChan <- de.Name()
+						} else {
+							pathChan <- osPathname
+						}
+					}
+					return nil
+				},
+			})
+			if err != nil {
+				logrus.Errorf(errors.FullTrace(err))
+			}
+		}(item.Name())
+	}
+
+	walkerWG.Wait()
+
+	close(pathChan)
+	pathWG.Wait()
+	return paths, nil
+}

store/store.go

@@ -1,27 +1,43 @@
 package store
 
-import "github.com/lbryio/lbry.go/extras/errors"
+import (
+	"github.com/lbryio/reflector.go/shared"
 
-// BlobStore is an interface with methods for consistently handling blob storage.
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+)
+
+// BlobStore is an interface for handling blob storage.
 type BlobStore interface {
-	// Does blob exist in the store
+	// Name of blob store (useful for metrics)
+	Name() string
+	// Has Does blob exist in the store.
 	Has(hash string) (bool, error)
-	// Get the blob from the store
-	Get(hash string) ([]byte, error)
-	// Put the blob into the store
-	Put(hash string, blob []byte) error
-	// Put an SD blob into the store
-	PutSD(hash string, blob []byte) error
-	// Delete the blob from the store
+	// Get the blob from the store. Must return ErrBlobNotFound if blob is not in store.
+	Get(hash string) (stream.Blob, shared.BlobTrace, error)
+	// Put the blob into the store.
+	Put(hash string, blob stream.Blob) error
+	// PutSD an SD blob into the store.
+	PutSD(hash string, blob stream.Blob) error
+	// Delete the blob from the store.
 	Delete(hash string) error
+	// Shutdown the store gracefully
+	Shutdown()
 }
 
+// Blocklister is a store that supports blocking blobs to prevent their inclusion in the store.
 type Blocklister interface {
 	// Block deletes the blob and prevents it from being uploaded in the future
 	Block(hash string) error
-	// Wants returns false if the hash exists or is blocked, true otherwise
+	// Wants returns false if the hash exists in store or is blocked, true otherwise
 	Wants(hash string) (bool, error)
 }
 
+// lister is a store that can list cached blobs. This is helpful when an overlay
+// cache needs to track blob existence.
+type lister interface {
+	list() ([]string, error)
+}
+
 //ErrBlobNotFound is a standard error when a blob is not found in the store.
 var ErrBlobNotFound = errors.Base("blob not found")

wallet/client.go

@@ -1,5 +1,24 @@
 package wallet
 
+import (
+	"encoding/base64"
+	"encoding/hex"
+
+	"github.com/lbryio/chainquery/lbrycrd"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/schema/stake"
+	types "github.com/lbryio/types/v2/go"
+
+	"github.com/btcsuite/btcutil"
+	"github.com/golang/protobuf/proto"
+	"github.com/spf13/cast"
+)
+
+// Raw makes a raw wallet server request
+func (n *Node) Raw(method string, params []string, v interface{}) error {
+	return n.request(method, params, v)
+}
+
 // ServerVersion returns the server's version.
 // https://electrumx.readthedocs.io/en/latest/protocol-methods.html#server-version
 func (n *Node) ServerVersion() (string, error) {
@@ -16,6 +35,38 @@ func (n *Node) ServerVersion() (string, error) {
 	return v, err
 }
 
+func (n *Node) Resolve(url string) (*types.Output, error) {
+	outputs := &types.Outputs{}
+	resp := &struct {
+		Result string `json:"result"`
+	}{}
+
+	err := n.request("blockchain.claimtrie.resolve", []string{url}, resp)
+	if err != nil {
+		return nil, err
+	}
+
+	b, err := base64.StdEncoding.DecodeString(resp.Result)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+
+	err = proto.Unmarshal(b, outputs)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+
+	if len(outputs.GetTxos()) != 1 {
+		return nil, errors.Err("expected 1 output, got " + cast.ToString(len(outputs.GetTxos())))
+	}
+
+	if e := outputs.GetTxos()[0].GetError(); e != nil {
+		return nil, errors.Err("%s: %s", e.GetCode(), e.GetText())
+	}
+
+	return outputs.GetTxos()[0], nil
+}
+
 type GetClaimsInTxResp struct {
 	Jsonrpc string `json:"jsonrpc"`
 	ID      int    `json:"id"`
@@ -41,3 +92,58 @@ func (n *Node) GetClaimsInTx(txid string) (*GetClaimsInTxResp, error) {
 	err := n.request("blockchain.claimtrie.getclaimsintx", []string{txid}, &resp)
 	return &resp, err
 }
+
+func (n *Node) GetTx(txid string) (string, error) {
+	resp := &struct {
+		Result string `json:"result"`
+	}{}
+
+	err := n.request("blockchain.transaction.get", []string{txid}, resp)
+	if err != nil {
+		return "", err
+	}
+
+	return resp.Result, nil
+}
+
+func (n *Node) GetClaimInTx(txid string, nout int) (*types.Claim, error) {
+	hexTx, err := n.GetTx(txid)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+
+	rawTx, err := hex.DecodeString(hexTx)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+
+	tx, err := btcutil.NewTxFromBytes(rawTx)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+
+	if len(tx.MsgTx().TxOut) <= nout {
+		return nil, errors.Err("nout not found")
+	}
+
+	script := tx.MsgTx().TxOut[nout].PkScript
+
+	var value []byte
+	if lbrycrd.IsClaimNameScript(script) {
+		_, value, _, err = lbrycrd.ParseClaimNameScript(script)
+	} else if lbrycrd.IsClaimUpdateScript(script) {
+		_, _, value, _, err = lbrycrd.ParseClaimUpdateScript(script)
+	} else {
+		err = errors.Err("no claim found in output")
+	}
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+
+	ch, err := stake.DecodeClaimBytes(value, "")
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+
+	return ch.Claim, nil
+}

wallet/network.go

@@ -10,11 +10,11 @@ import (
 	"sync"
 	"time"
 
-	"github.com/lbryio/lbry.go/extras/errors"
-	"github.com/lbryio/lbry.go/extras/stop"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
 
 	log "github.com/sirupsen/logrus"
-	"github.com/uber-go/atomic"
+	"go.uber.org/atomic"
 )
 
 const (
@@ -63,7 +63,7 @@ func NewNode() *Node {
 // Connect creates a new connection to the specified address.
 func (n *Node) Connect(addrs []string, config *tls.Config) error {
 	if n.transport != nil {
-		return ErrNodeConnected
+		return errors.Err(ErrNodeConnected)
 	}
 
 	// shuffle addresses for load balancing
@@ -76,15 +76,18 @@ func (n *Node) Connect(addrs []string, config *tls.Config) error {
 		if err == nil {
 			break
 		}
+		if errors.Is(err, ErrTimeout) {
+			continue
+		}
 		if e, ok := err.(*net.OpError); ok && e.Err.Error() == "no such host" {
 			// net.errNoSuchHost is not exported, so we have to string-match
 			continue
 		}
-		return err
+		return errors.Err(err)
 	}
 
 	if n.transport == nil {
-		return ErrConnectFailed
+		return errors.Err(ErrConnectFailed)
 	}
 
 	log.Debugf("wallet connected to %s", n.transport.conn.RemoteAddr())
@@ -112,7 +115,13 @@ func (n *Node) Connect(addrs []string, config *tls.Config) error {
 }
 
 func (n *Node) Shutdown() {
+	var addr net.Addr
+	if n.transport != nil {
+		addr = n.transport.conn.RemoteAddr()
+	}
+	log.Debugf("shutting down wallet %s", addr)
 	n.grp.StopAndWait()
+	log.Debugf("wallet stopped")
 }
 
 func (n *Node) handleErrors() {
@@ -121,7 +130,7 @@ func (n *Node) handleErrors() {
 		case <-n.grp.Ch():
 			return
 		case err := <-n.transport.Errors():
-			n.err(err)
+			n.err(errors.Err(err))
 		}
 	}
 }
@@ -129,12 +138,18 @@ func (n *Node) handleErrors() {
 // err handles errors produced by the foreign node.
 func (n *Node) err(err error) {
 	// TODO: Better error handling.
-	log.Error(err)
+	log.Error(errors.FullTrace(err))
 }
 
 // listen processes messages from the server.
 func (n *Node) listen() {
 	for {
+		select {
+		case <-n.grp.Ch():
+			return
+		default:
+		}
+
 		select {
 		case <-n.grp.Ch():
 			return
@@ -147,14 +162,36 @@ func (n *Node) listen() {
 					Message string `json:"message"`
 				} `json:"error"`
 			}{}
-			if err := json.Unmarshal(bytes, msg); err != nil {
-				n.err(err)
-				continue
+			msg2 := &struct {
+				Id     uint32 `json:"id"`
+				Method string `json:"method"`
+				Error  struct {
+					Code    int `json:"code"`
+					Message struct {
+						Code    int    `json:"code"`
+						Message string `json:"message"`
+					} `json:"message"`
+				} `json:"error"`
+			}{}
+			r := response{}
+
+			err := json.Unmarshal(bytes, msg)
+			if err != nil {
+				// try msg2, a hack around the weird error-in-error response we sometimes get from wallet server
+				// maybe that happens because the wallet server passes a lbrycrd error through to us?
+				if err2 := json.Unmarshal(bytes, msg2); err2 == nil {
+					err = nil
+					msg.Id = msg2.Id
+					msg.Method = msg2.Method
+					msg.Error = msg2.Error.Message
+				}
 			}
 
-			r := response{}
-			if len(msg.Error.Message) > 0 {
-				r.err = errors.Base("%d: %s", msg.Error.Code, msg.Error.Message)
+			if err != nil {
+				r.err = errors.Err(err)
+				n.err(r.err)
+			} else if len(msg.Error.Message) > 0 {
+				r.err = errors.Err("%d: %s", msg.Error.Code, msg.Error.Message)
 			} else {
 				r.data = bytes
 			}
@@ -206,7 +243,7 @@ func (n *Node) request(method string, params []string, v interface{}) error {
 
 	bytes, err := json.Marshal(msg)
 	if err != nil {
-		return err
+		return errors.Err(err)
 	}
 	bytes = append(bytes, delimiter)
 
@@ -218,11 +255,13 @@ func (n *Node) request(method string, params []string, v interface{}) error {
 
 	err = n.transport.Send(bytes)
 	if err != nil {
-		return err
+		return errors.Err(err)
 	}
 
 	var r response
 	select {
+	case <-n.grp.Ch():
+		return nil
 	case r = <-c:
 	case <-time.After(n.timeout):
 		r = response{err: errors.Err(ErrTimeout)}
@@ -233,8 +272,8 @@ func (n *Node) request(method string, params []string, v interface{}) error {
 	n.handlersMu.Unlock()
 
 	if r.err != nil {
-		return r.err
+		return errors.Err(r.err)
 	}
 
-	return json.Unmarshal(r.data, v)
+	return errors.Err(json.Unmarshal(r.data, v))
 }

wallet/transport.go

@@ -5,10 +5,14 @@ package wallet
 import (
 	"bufio"
 	"crypto/tls"
+	"encoding/json"
+	"fmt"
 	"net"
 	"time"
 
-	"github.com/lbryio/lbry.go/extras/stop"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+
 	log "github.com/sirupsen/logrus"
 )
 
@@ -49,15 +53,31 @@ func NewTransport(addr string, config *tls.Config) (*TCPTransport, error) {
 
 	t.grp.Add(1)
 	go func() {
-		t.grp.Done()
+		defer t.grp.Done()
 		t.listen()
 	}()
 
+	err = t.test()
+	if err != nil {
+		t.grp.StopAndWait()
+		return nil, errors.Prefix(addr, err)
+	}
+
 	return t, nil
 }
 
 const delimiter = byte('\n')
 
+func (t *TCPTransport) Send(body []byte) error {
+	log.Debugf("%s <- %s", t.conn.RemoteAddr(), body)
+	_, err := t.conn.Write(body)
+	return err
+}
+
+func (t *TCPTransport) Responses() <-chan []byte { return t.responses }
+func (t *TCPTransport) Errors() <-chan error     { return t.errors }
+func (t *TCPTransport) Shutdown()                { t.grp.StopAndWait() }
+
 func (t *TCPTransport) listen() {
 	reader := bufio.NewReader(t.conn)
 	for {
@@ -73,12 +93,6 @@ func (t *TCPTransport) listen() {
 	}
 }
 
-func (t *TCPTransport) Send(body []byte) error {
-	log.Debugf("%s <- %s", t.conn.RemoteAddr(), body)
-	_, err := t.conn.Write(body)
-	return err
-}
-
 func (t *TCPTransport) error(err error) {
 	select {
 	case t.errors <- err:
@@ -86,11 +100,33 @@ func (t *TCPTransport) error(err error) {
 	}
 }
 
-func (t *TCPTransport) Responses() <-chan []byte { return t.responses }
-func (t *TCPTransport) Errors() <-chan error     { return t.errors }
+func (t *TCPTransport) test() error {
+	err := t.Send([]byte(`{"id":1,"method":"server.version"}` + "\n"))
+	if err != nil {
+		return errors.Err(err)
+	}
 
-func (t *TCPTransport) Shutdown() {
-	t.grp.StopAndWait()
+	var data []byte
+	select {
+	case data = <-t.Responses():
+	case <-time.Tick(1 * time.Second):
+		return errors.Err(ErrTimeout)
+	}
+
+	var response struct {
+		Error struct {
+			Message string `json:"message"`
+		} `json:"error"`
+	}
+
+	err = json.Unmarshal(data, &response)
+	if err != nil {
+		return errors.Err(err)
+	}
+	if response.Error.Message != "" {
+		return fmt.Errorf(response.Error.Message)
+	}
+	return nil
 }
 
 func (t *TCPTransport) close() {