lightning: march 2018 rebase, without integration

electrum/gui/kivy/main.kv

@@ -449,6 +449,12 @@ BoxLayout:
                 ActionOvrButton:
                     name: 'network'
                     text: _('Network')
+                ActionOvrButton:
+                    name: 'lightning_payer_dialog'
+                    text: _('Pay Lightning Invoice')
+                ActionOvrButton:
+                    name: 'lightning_channels_dialog'
+                    text: _('Lightning Channels')
                 ActionOvrButton:
                     name: 'settings'
                     text: _('Settings')

electrum/gui/kivy/main_window.py

@@ -75,6 +75,8 @@ from electrum.util import (base_units, NoDynamicFeeEstimates, decimal_point_to_b
                            base_unit_name_to_decimal_point, NotEnoughFunds, UnknownBaseUnit,
                            DECIMAL_POINT_DEFAULT)
 
+from .uix.dialogs.lightning_payer import LightningPayerDialog
+from .uix.dialogs.lightning_channels import LightningChannelsDialog
 
 class ElectrumWindow(App):
 
@@ -635,6 +637,14 @@ class ElectrumWindow(App):
         self._settings_dialog.update()
         self._settings_dialog.open()
 
+    def lightning_payer_dialog(self):
+        d = LightningPayerDialog(self)
+        d.open()
+
+    def lightning_channels_dialog(self):
+        d = LightningChannelsDialog(self)
+        d.open()
+
     def popup_dialog(self, name):
         if name == 'settings':
             self.settings_dialog()
@@ -652,6 +662,8 @@ class ElectrumWindow(App):
                 ref.data = xpub
                 master_public_keys_layout.add_widget(ref)
             popup.open()
+        elif name.endswith("_dialog"):
+            getattr(self, name)()
         else:
             popup = Builder.load_file('electrum/gui/kivy/uix/ui_screens/'+name+'.kv')
             popup.open()

gui/kivy/uix/dialogs/lightning_channels.py

@@ -0,0 +1,49 @@
+from kivy.lang import Builder
+from kivy.factory import Factory
+
+Builder.load_string('''
+<LightningChannelItem@CardItem>
+    channelId: '<channelId not set>'
+    Label:
+        text: root.channelId
+
+<LightningChannelsDialog@Popup>:
+    name: 'lightning_channels'
+    BoxLayout:
+        orientation: 'vertical'
+        spacing: '1dp'
+        ScrollView:
+            GridLayout:
+                cols: 1
+                id: lightning_channels_container
+                size_hint: 1, None
+                height: self.minimum_height
+                spacing: '2dp'
+                padding: '12dp'
+''')
+
+class LightningChannelsDialog(Factory.Popup):
+    def __init__(self, app):
+        super(LightningChannelsDialog, self).__init__()
+        self.clocks = []
+        self.app = app
+    def open(self, *args, **kwargs):
+        super(LightningChannelsDialog, self).open(*args, **kwargs)
+        for i in self.clocks: i.cancel()
+        self.clocks.append(Clock.schedule_interval(self.fetch_channels, 10))
+        self.app.wallet.lightning.subscribe(self.rpc_result_handler)
+    def dismiss(self, *args, **kwargs):
+        super(LightningChannelsDialog, self).dismiss(*args, **kwargs)
+        self.app.wallet.lightning.clearSubscribers()
+    def fetch_channels(self, dw):
+        lightning.lightningCall(self.app.wallet.lightning, "listchannels")()
+    def rpc_result_handler(self, res):
+        if isinstance(res, Exception):
+            raise res
+        channel_cards = self.ids.lightning_channels_container
+        channels_cards.clear_widgets()
+        for i in res["channels"]:
+            item = Factory.LightningChannelItem()
+            item.screen = self
+            item.channelId = i.channelId
+            channel_cards.add_widget(item)

gui/kivy/uix/dialogs/lightning_payer.py

@@ -0,0 +1,68 @@
+from kivy.lang import Builder
+from kivy.factory import Factory
+from electrum_gui.kivy.i18n import _
+
+Builder.load_string('''
+<LightningPayerDialog@Popup>
+    id: s
+    name: 'lightning_payer'
+    invoice_data: ''
+    BoxLayout:
+        orientation: "vertical"
+        BlueButton:
+            text: s.invoice_data if s.invoice_data else _('Lightning invoice')
+            shorten: True
+            on_release: Clock.schedule_once(lambda dt: app.show_info(_('Copy and paste the lightning invoice using the Paste button, or use the camera to scan a QR code.')))
+        GridLayout:
+            cols: 4
+            size_hint: 1, None
+            height: '48dp'
+            IconButton:
+                id: qr
+                on_release: Clock.schedule_once(lambda dt: app.scan_qr(on_complete=s.on_lightning_qr))
+                icon: 'atlas://gui/kivy/theming/light/camera'
+            Button:
+                text: _('Paste')
+                on_release: s.do_paste()
+            Button:
+                text: _('Paste sample')
+                on_release: s.do_paste_sample()
+            Button:
+                text: _('Clear')
+                on_release: s.do_clear()
+        Button:
+            size_hint: 1, None
+            height: '48dp'
+            text: _('Pay pasted/scanned invoice')
+            on_release: s.do_pay()
+''')
+
+class LightningPayerDialog(Factory.Popup):
+    def __init__(self, app):
+        super(LightningPayerDialog, self).__init__()
+        self.app = app
+    def open(self, *args, **kwargs):
+        super(LightningPayerDialog, self).open(*args, **kwargs)
+        class FakeQtSignal:
+            def emit(self2, data):
+                self.app.show_info(data)
+        class MyConsole:
+            newResult = FakeQtSignal()
+        self.app.wallet.lightning.setConsole(MyConsole())
+    def dismiss(self, *args, **kwargs):
+        super(LightningPayerDialog, self).dismiss(*args, **kwargs)
+        self.app.wallet.lightning.setConsole(None)
+    def do_paste_sample(self):
+        self.invoice_data = "lnbc1pvjluezpp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqdpl2pkx2ctnv5sxxmmwwd5kgetjypeh2ursdae8g6twvus8g6rfwvs8qun0dfjkxaq8rkx3yf5tcsyz3d73gafnh3cax9rn449d9p5uxz9ezhhypd0elx87sjle52x86fux2ypatgddc6k63n7erqz25le42c4u4ecky03ylcqca784w"
+    def do_paste(self):
+        contents = self.app._clipboard.paste()
+        if not contents:
+            self.app.show_info(_("Clipboard is empty"))
+            return
+        self.invoice_data = contents
+    def do_clear(self):
+        self.invoice_data = ""
+    def do_pay(self):
+        lightning.lightningCall(self.app.wallet.lightning, "sendpayment")("--pay_req=" + self.invoice_data)
+    def on_lightning_qr(self):
+        self.app.show_info("Lightning Invoice QR scanning not implemented") #TODO

gui/qt/lightning_invoice_list.py

@@ -0,0 +1,147 @@
+# -*- coding: utf-8 -*-
+import base64
+import binascii
+from PyQt5 import QtCore, QtWidgets
+from collections import OrderedDict
+import logging
+from electrum.lightning import lightningCall
+
+mapping = {0: "r_hash", 1: "pay_req", 2: "settled"}
+revMapp = {"r_hash": 0, "pay_req": 1, "settled": 2}
+datatable = OrderedDict([])
+idx = 0
+
+class MyTableRow(QtWidgets.QTreeWidgetItem):
+    def __init__(self, di):
+        if "settled" not in di:
+            di["settled"] = False
+        strs = [str(di[mapping[key]]) for key in range(len(mapping))]
+        print(strs)
+        super(MyTableRow, self).__init__(strs)
+        assert isinstance(di, dict)
+        self.di = di
+    def __getitem__(self, idx):
+        return self.di[idx]
+    def __setitem__(self, idx, val):
+        self.di[idx] = val
+        try:
+            self.setData(revMapp[idx], QtCore.Qt.DisplayRole, '{0}'.format(val))
+        except KeyError:
+            logging.warning("Lightning Invoice field %s unknown", idx)
+    def __str__(self):
+        return str(self.di)
+
+def addInvoiceRow(new):
+    made = MyTableRow(new)
+    datatable[new["r_hash"]] = made
+    datatable.move_to_end(new["r_hash"], last=False)
+    return made
+
+def clickHandler(numInput, treeView, lightningRpc):
+    amt = numInput.value()
+    if amt < 1:
+        print("value too small")
+        return
+    print("creating invoice with value {}".format(amt))
+    global idx
+    #obj = {
+    #    "r_hash": binascii.hexlify((int.from_bytes(bytearray.fromhex("9500edb0994b7bc23349193486b25c82097045db641f35fa988c0e849acdec29"), "big")+idx).to_bytes(byteorder="big", length=32)).decode("ascii"),
+    #    "pay_req": "lntb81920n1pdf258s" + str(idx),
+    #    "settled": False
+    #}
+    #treeView.insertTopLevelItem(0, addInvoiceRow(obj))
+    idx += 1
+    lightningCall(lightningRpc, "addinvoice")("--amt=" + str(amt))
+
+class LightningInvoiceList(QtWidgets.QWidget):
+    def create_menu(self, position):
+        menu = QtWidgets.QMenu()
+        pay_req = self._tv.currentItem()["pay_req"]
+        cb = QtWidgets.QApplication.instance().clipboard()
+        def copy():
+            print(pay_req)
+            cb.setText(pay_req)
+        menu.addAction("Copy payment request", copy)
+        menu.exec_(self._tv.viewport().mapToGlobal(position))
+    def lightningWorkerHandler(self, sourceClassName, obj):
+        new = {}
+        for k, v in obj.items():
+            try:
+                v = binascii.hexlify(base64.b64decode(v)).decode("ascii")
+            except:
+                pass
+            new[k] = v
+        try:
+            obj = datatable[new["r_hash"]]
+        except KeyError:
+            print("lightning payment invoice r_hash {} unknown!".format(new["r_hash"]))
+        else:
+            for k, v in new.items():
+                try:
+                    if obj[k] != v: obj[k] = v
+                except KeyError:
+                    obj[k] = v
+    def lightningRpcHandler(self, methodName, obj):
+        if methodName != "addinvoice":
+            print("ignoring reply {} to {}".format(obj, methodName))
+            return
+        self._tv.insertTopLevelItem(0, addInvoiceRow(obj))
+        
+    def __init__(self, parent, lightningWorker, lightningRpc):
+        QtWidgets.QWidget.__init__(self, parent)
+
+        lightningWorker.subscribe(self.lightningWorkerHandler)
+        lightningRpc.subscribe(self.lightningRpcHandler)
+
+        self._tv=QtWidgets.QTreeWidget(self)
+        self._tv.setHeaderLabels([mapping[i] for i in range(len(mapping))])
+        self._tv.setColumnCount(len(mapping))
+        self._tv.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
+        self._tv.customContextMenuRequested.connect(self.create_menu)
+
+        class SatoshiCountSpinBox(QtWidgets.QSpinBox):
+            def keyPressEvent(self2, e):
+                super(SatoshiCountSpinBox, self2).keyPressEvent(e)
+                if QtCore.Qt.Key_Return == e.key():
+                    clickHandler(self2, self._tv, lightningRpc)
+
+        numInput = SatoshiCountSpinBox(self)
+
+        button = QtWidgets.QPushButton('Add invoice', self)
+        button.clicked.connect(lambda: clickHandler(numInput, self._tv, lightningRpc))
+
+        l=QtWidgets.QVBoxLayout(self)
+        h=QtWidgets.QGridLayout(self)
+        h.addWidget(numInput, 0, 0)
+        h.addWidget(button, 0, 1)
+        #h.addItem(QtWidgets.QSpacerItem(100, 200, QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred), 0, 2)
+        #h.setSizePolicy(
+        h.setColumnStretch(0, 1)
+        h.setColumnStretch(1, 1)
+        h.setColumnStretch(2, 2)
+        l.addLayout(h)
+        l.addWidget(self._tv)
+
+        self.resize(2500,1000)
+
+def tick():
+  key = "9500edb0994b7bc23349193486b25c82097045db641f35fa988c0e849acdec29"
+  if not key in datatable:
+      return
+  row = datatable[key]
+  row["settled"] = not row["settled"]
+  print("data changed")
+
+if __name__=="__main__":
+    from sys import argv, exit
+
+    a=QtWidgets.QApplication(argv)
+
+    w=LightningInvoiceList()
+    w.show()
+    w.raise_()
+
+    timer = QtCore.QTimer()
+    timer.timeout.connect(tick)
+    timer.start(1000)
+    exit(a.exec_())

lib/lightning.py

@@ -0,0 +1,912 @@
+import functools
+import sys
+import struct
+import traceback
+sys.path.insert(0, "lib/ln")
+from .ln import rpc_pb2
+
+from jsonrpclib import Server
+from google.protobuf import json_format
+import binascii
+import ecdsa.util
+import hashlib
+from .bitcoin import EC_KEY, MySigningKey
+from ecdsa.curves import SECP256k1
+from . import bitcoin
+from . import transaction
+from . import keystore
+
+import queue
+
+from .util import ForeverCoroutineJob
+
+import threading
+import json
+import base64
+
+import asyncio
+
+from concurrent.futures import TimeoutError
+
+WALLET = None
+NETWORK = None
+CONFIG = None
+locked = set()
+
+machine = "148.251.87.112"
+#machine = "127.0.0.1"
+
+def WriteDb(json):
+    req = rpc_pb2.WriteDbRequest()
+    json_format.Parse(json, req)
+    print("writedb unimplemented", req.dbData)
+    m = rpc_pb2.WriteDbResponse()
+    msg = json_format.MessageToJson(m)
+    return msg
+
+
+def ConfirmedBalance(json):
+    request = rpc_pb2.ConfirmedBalanceRequest()
+    json_format.Parse(json, request)
+    m = rpc_pb2.ConfirmedBalanceResponse()
+    confs = request.confirmations
+    #witness = request.witness  # bool
+
+    m.amount = sum(WALLET.get_balance())
+    msg = json_format.MessageToJson(m)
+    return msg
+
+
+def NewAddress(json):
+    request = rpc_pb2.NewAddressRequest()
+    json_format.Parse(json, request)
+    m = rpc_pb2.NewAddressResponse()
+    if request.type == rpc_pb2.WITNESS_PUBKEY_HASH:
+        m.address = WALLET.get_unused_address()
+    elif request.type == rpc_pb2.NESTED_PUBKEY_HASH:
+        assert False, "cannot handle nested-pubkey-hash address type generation yet"
+    elif request.type == rpc_pb2.PUBKEY_HASH:
+        assert False, "cannot handle pubkey_hash generation yet"
+    else:
+        assert False, "unknown address type"
+    msg = json_format.MessageToJson(m)
+    return msg
+
+
+#def FetchRootKey(json):
+#    request = rpc_pb2.FetchRootKeyRequest()
+#    json_format.Parse(json, request)
+#    m = rpc_pb2.FetchRootKeyResponse()
+#    m.rootKey = WALLET.keystore.get_private_key([151,151,151,151], None)[0]
+#    msg = json_format.MessageToJson(m)
+#    return msg
+
+
+cl = rpc_pb2.ListUnspentWitnessRequest
+
+assert rpc_pb2.WITNESS_PUBKEY_HASH is not None
+
+
+def ListUnspentWitness(json):
+    req = cl()
+    json_format.Parse(json, req)
+    confs = req.minConfirmations #TODO regard this
+
+    unspent = WALLET.get_utxos()
+    m = rpc_pb2.ListUnspentWitnessResponse()
+    for utxo in unspent:
+        # print(utxo)
+        # example:
+        # {'prevout_n': 0,
+        #  'address': 'sb1qt52ccplvtpehz7qvvqft2udf2eaqvfsal08xre',
+        #  'prevout_hash': '0d4caccd6e8a906c8ca22badf597c4dedc6dd7839f3cac3137f8f29212099882',
+        #  'coinbase': False,
+        #  'height': 326,
+        #  'value': 400000000}
+
+        global locked
+        if (utxo["prevout_hash"], utxo["prevout_n"]) in locked:
+            print("SKIPPING LOCKED OUTPOINT", utxo["prevout_hash"])
+            continue
+        towire = m.utxos.add()
+        towire.addressType = rpc_pb2.WITNESS_PUBKEY_HASH
+        towire.redeemScript = b""
+        towire.pkScript = b""
+        towire.witnessScript = bytes(bytearray.fromhex(
+            bitcoin.address_to_script(utxo["address"])))
+        towire.value = utxo["value"]
+        towire.outPoint.hash = utxo["prevout_hash"]
+        towire.outPoint.index = utxo["prevout_n"]
+    return json_format.MessageToJson(m)
+
+def LockOutpoint(json):
+    req = rpc_pb2.LockOutpointRequest()
+    json_format.Parse(json, req)
+    global locked
+    locked.add((req.outpoint.hash, req.outpoint.index))
+
+
+def UnlockOutpoint(json):
+    req = rpc_pb2.UnlockOutpointRequest()
+    json_format.Parse(json, req)
+    global locked
+    # throws KeyError if not existing. Use .discard() if we do not care
+    locked.remove((req.outpoint.hash, req.outpoint.index))
+
+def ListTransactionDetails(json):
+    global WALLET
+    global NETWORK
+    m = rpc_pb2.ListTransactionDetailsResponse()
+    for tx_hash, height, conf, timestamp, delta, balance in WALLET.get_history():
+        if height == 0:
+          print("WARNING", tx_hash, "has zero height!")
+        detail = m.details.add()
+        detail.hash = tx_hash
+        detail.value = delta
+        detail.numConfirmations = conf
+        detail.blockHash = NETWORK.blockchain().get_hash(height)
+        detail.blockHeight = height
+        detail.timestamp = timestamp
+        detail.totalFees = 1337 # TODO
+    return json_format.MessageToJson(m)
+
+def FetchInputInfo(json):
+    req = rpc_pb2.FetchInputInfoRequest()
+    json_format.Parse(json, req)
+    has = req.outPoint.hash
+    idx = req.outPoint.index
+    txoinfo = WALLET.txo.get(has, {})
+    m = rpc_pb2.FetchInputInfoResponse()
+    if has in WALLET.transactions:
+        tx = WALLET.transactions[has]
+        m.mine = True
+    else:
+        tx = WALLET.get_input_tx(has)
+        print("did not find tx with hash", has)
+        print("tx", tx)
+
+        m.mine = False
+        return json_format.MessageToJson(m)
+    outputs = tx.outputs()
+    assert {bitcoin.TYPE_SCRIPT: "SCRIPT", bitcoin.TYPE_ADDRESS: "ADDRESS",
+            bitcoin.TYPE_PUBKEY: "PUBKEY"}[outputs[idx][0]] == "ADDRESS"
+    scr = transaction.Transaction.pay_script(outputs[idx][0], outputs[idx][1])
+    m.txOut.value = outputs[idx][2]  # type, addr, val
+    m.txOut.pkScript = bytes(bytearray.fromhex(scr))
+    msg = json_format.MessageToJson(m)
+    return msg
+
+def SendOutputs(json):
+    global NETWORK, WALLET, CONFIG
+
+    req = rpc_pb2.SendOutputsRequest()
+    json_format.Parse(json, req)
+
+    m = rpc_pb2.SendOutputsResponse()
+
+    elecOutputs = [(bitcoin.TYPE_SCRIPT, binascii.hexlify(txout.pkScript).decode("utf-8"), txout.value) for txout in req.outputs]
+
+    print("ignoring feeSatPerByte", req.feeSatPerByte) # TODO
+
+    tx = None
+    try:
+        #                outputs,     password, config, fee
+        tx = WALLET.mktx(elecOutputs, None,     CONFIG, 1000)
+    except Exception as e:
+        m.success = False
+        m.error = str(e)
+        m.resultHash = ""
+        return json_format.MessageToJson(m)
+
+    suc, has = NETWORK.broadcast(tx)
+    if not suc:
+        m.success = False
+        m.error = "electrum/lightning/SendOutputs: Could not broadcast: " + str(has)
+        m.resultHash = ""
+        return json_format.MessageToJson(m)
+    m.success = True
+    m.error = ""
+    m.resultHash = tx.txid()
+    return json_format.MessageToJson(m)
+
+def isSynced():
+    global NETWORK
+    local_height, server_height = NETWORK.get_status_value("updated")
+    synced = server_height != 0 and NETWORK.is_up_to_date() and local_height >= server_height
+    return synced, local_height, server_height
+
+def IsSynced(json):
+    m = rpc_pb2.IsSyncedResponse()
+    m.synced, localHeight, _ = isSynced()
+    block = NETWORK.blockchain().read_header(localHeight)
+    m.lastBlockTimeStamp = block["timestamp"]
+    return json_format.MessageToJson(m)
+
+def SignMessage(json):
+    req = rpc_pb2.SignMessageRequest()
+    json_format.Parse(json, req)
+    m = rpc_pb2.SignMessageResponse()
+
+    pri = privKeyForPubKey(req.pubKey)
+
+    m.signature = pri.sign(bitcoin.Hash(req.messageToBeSigned), ecdsa.util.sigencode_der)
+    m.error = ""
+    m.success = True
+    return json_format.MessageToJson(m)
+
+def LEtobytes(x, l):
+    if l == 2:
+        fmt = "<H"
+    elif l == 4:
+        fmt = "<I"
+    elif l == 8:
+        fmt = "<Q"
+    else:
+        assert False, "invalid format for LEtobytes"
+    return struct.pack(fmt, x)
+
+
+def toint(x):
+    if len(x) == 1:
+        return ord(x)
+    elif len(x) == 2:
+        fmt = ">H"
+    elif len(x) == 4:
+        fmt = ">I"
+    elif len(x) == 8:
+        fmt = ">Q"
+    else:
+        assert False, "invalid length for toint(): " + str(len(x))
+    return struct.unpack(fmt, x)[0]
+
+class TxSigHashes(object):
+    def __init__(self, hashOutputs=None, hashSequence=None, hashPrevOuts=None):
+        self.hashOutputs = hashOutputs
+        self.hashSequence = hashSequence
+        self.hashPrevOuts = hashPrevOuts
+
+
+class Output(object):
+    def __init__(self, value=None, pkScript=None):
+        assert value is not None and pkScript is not None
+        self.value = value
+        self.pkScript = pkScript
+
+
+class InputScript(object):
+    def __init__(self, scriptSig, witness):
+        assert witness is None or type(witness[0]) is type(bytes([]))
+        assert type(scriptSig) is type(bytes([]))
+        self.scriptSig = scriptSig
+        self.witness = witness
+
+
+def tweakPrivKey(basePriv, commitTweak):
+    tweakInt = int.from_bytes(commitTweak, byteorder="big")
+    tweakInt += basePriv.secret # D is secret
+    tweakInt %= SECP256k1.generator.order()
+    return EC_KEY(tweakInt.to_bytes(32, 'big'))
+
+def singleTweakBytes(commitPoint, basePoint):
+    m = hashlib.sha256()
+    m.update(bytearray.fromhex(commitPoint))
+    m.update(bytearray.fromhex(basePoint))
+    return m.digest()
+
+def deriveRevocationPrivKey(revokeBasePriv, commitSecret):
+    revokeTweakBytes = singleTweakBytes(revokeBasePriv.get_public_key(True),
+                                        commitSecret.get_public_key(True))
+    revokeTweakInt = int.from_bytes(revokeTweakBytes, byteorder="big")
+
+    commitTweakBytes = singleTweakBytes(commitSecret.get_public_key(True),
+                                        revokeBasePriv.get_public_key(True))
+    commitTweakInt = int.from_bytes(commitTweakBytes, byteorder="big")
+
+    revokeHalfPriv = revokeTweakInt * revokeBasePriv.secret # D is secret
+    commitHalfPriv = commitTweakInt * commitSecret.secret
+
+    revocationPriv = revokeHalfPriv + commitHalfPriv
+    revocationPriv %= SECP256k1.generator.order()
+
+    return EC_KEY(revocationPriv.to_bytes(32, byteorder="big"))
+
+
+def maybeTweakPrivKey(signdesc, pri):
+    if len(signdesc.singleTweak) > 0:
+        pri2 = tweakPrivKey(pri, signdesc.singleTweak)
+    elif len(signdesc.doubleTweak) > 0:
+        pri2 = deriveRevocationPrivKey(pri, EC_KEY(signdesc.doubleTweak))
+    else:
+        pri2 = pri
+
+    if pri2 != pri:
+        have_keys = WALLET.storage.get("lightning_extra_keys", [])
+        if pri2.secret not in have_keys:
+            WALLET.storage.put("lightning_extra_keys", have_keys + [pri2.secret])
+            WALLET.storage.write()
+            print("saved new tweaked key", pri2.secret)
+
+    return pri2
+
+
+def isWitnessPubKeyHash(script):
+    if len(script) != 2:
+        return False
+    haveop0 = (transaction.opcodes.OP_0 == script[0][0])
+    haveopdata20 = (20 == script[1][0])
+    return haveop0 and haveopdata20
+
+#// calcWitnessSignatureHash computes the sighash digest of a transaction's
+#// segwit input using the new, optimized digest calculation algorithm defined
+#// in BIP0143: https://github.com/bitcoin/bips/blob/master/bip-0143.mediawiki.
+#// This function makes use of pre-calculated sighash fragments stored within
+#// the passed HashCache to eliminate duplicate hashing computations when
+#// calculating the final digest, reducing the complexity from O(N^2) to O(N).
+#// Additionally, signatures now cover the input value of the referenced unspent
+#// output. This allows offline, or hardware wallets to compute the exact amount
+#// being spent, in addition to the final transaction fee. In the case the
+#// wallet if fed an invalid input amount, the real sighash will differ causing
+#// the produced signature to be invalid.
+
+
+def calcWitnessSignatureHash(original, sigHashes, hashType, tx, idx, amt):
+    assert len(original) != 0
+    decoded = transaction.deserialize(binascii.hexlify(tx).decode("utf-8"))
+    if idx > len(decoded["inputs"]) - 1:
+        raise Exception("invalid inputIndex")
+    txin = decoded["inputs"][idx]
+    #tohash = transaction.Transaction.serialize_witness(txin)
+    sigHash = LEtobytes(decoded["version"], 4)
+    if toint(hashType) & toint(sigHashAnyOneCanPay) == 0:
+        sigHash += bytes(bytearray.fromhex(sigHashes.hashPrevOuts))[::-1]
+    else:
+        sigHash += b"\x00" * 32
+
+    if toint(hashType) & toint(sigHashAnyOneCanPay) == 0 and toint(hashType) & toint(sigHashMask) != toint(sigHashSingle) and toint(hashType) & toint(sigHashMask) != toint(sigHashNone):
+        sigHash += bytes(bytearray.fromhex(sigHashes.hashSequence))[::-1]
+    else:
+        sigHash += b"\x00" * 32
+
+    sigHash += bytes(bytearray.fromhex(txin["prevout_hash"]))[::-1]
+    sigHash += LEtobytes(txin["prevout_n"], 4)
+    # byte 72
+
+    subscript = list(transaction.script_GetOp(original))
+    if isWitnessPubKeyHash(subscript):
+        sigHash += b"\x19"
+        sigHash += bytes([transaction.opcodes.OP_DUP])
+        sigHash += bytes([transaction.opcodes.OP_HASH160])
+        sigHash += b"\x14"  # 20 bytes
+        assert len(subscript) == 2, subscript
+        opcode, data, length = subscript[1]
+        sigHash += data
+        sigHash += bytes([transaction.opcodes.OP_EQUALVERIFY])
+        sigHash += bytes([transaction.opcodes.OP_CHECKSIG])
+    else:
+        # For p2wsh outputs, and future outputs, the script code is
+        # the original script, with all code separators removed,
+        # serialized with a var int length prefix.
+
+        assert len(sigHash) == 104, len(sigHash)
+        sigHash += bytes(bytearray.fromhex(bitcoin.var_int(len(original))))
+        assert len(sigHash) == 105, len(sigHash)
+
+        sigHash += original
+
+    sigHash += LEtobytes(amt, 8)
+    sigHash += LEtobytes(txin["sequence"], 4)
+
+    if toint(hashType) & toint(sigHashSingle) != toint(sigHashSingle) and toint(hashType) & toint(sigHashNone) != toint(sigHashNone):
+        sigHash += bytes(bytearray.fromhex(sigHashes.hashOutputs))[::-1]
+    elif toint(hashtype) & toint(sigHashMask) == toint(sigHashSingle) and idx < len(decoded["outputs"]):
+        raise Exception("TODO 1")
+    else:
+        raise Exception("TODO 2")
+
+    sigHash += LEtobytes(decoded["lockTime"], 4)
+    sigHash += LEtobytes(toint(hashType), 4)
+
+    return transaction.Hash(sigHash)
+
+#// RawTxInWitnessSignature returns the serialized ECDA signature for the input
+#// idx of the given transaction, with the hashType appended to it. This
+#// function is identical to RawTxInSignature, however the signature generated
+#// signs a new sighash digest defined in BIP0143.
+# func RawTxInWitnessSignature(tx *MsgTx, sigHashes *TxSigHashes, idx int,
+#  amt int64, subScript []byte, hashType SigHashType,
+#  key *btcec.PrivateKey) ([]byte, error) {
+
+
+def rawTxInWitnessSignature(tx, sigHashes, idx, amt, subscript, hashType, key):
+    digest = calcWitnessSignatureHash(
+        subscript, sigHashes, hashType, tx, idx, amt)
+    return key.sign(digest, sigencode=ecdsa.util.sigencode_der) + hashType
+
+# WitnessSignature creates an input witness stack for tx to spend BTC sent
+# from a previous output to the owner of privKey using the p2wkh script
+# template. The passed transaction must contain all the inputs and outputs as
+# dictated by the passed hashType. The signature generated observes the new
+# transaction digest algorithm defined within BIP0143.
+def witnessSignature(tx, sigHashes, idx, amt, subscript, hashType, privKey, compress):
+    sig = rawTxInWitnessSignature(
+        tx, sigHashes, idx, amt, subscript, hashType, privKey)
+
+    pkData = bytes(bytearray.fromhex(
+        privKey.get_public_key(compressed=compress)))
+
+    return sig, pkData
+
+
+sigHashMask = b"\x1f"
+
+sigHashAll = b"\x01"
+sigHashNone = b"\x02"
+sigHashSingle = b"\x03"
+sigHashAnyOneCanPay = b"\x80"
+
+test = rpc_pb2.ComputeInputScriptResponse()
+
+test.witnessScript.append(b"\x01")
+test.witnessScript.append(b"\x02")
+
+
+def SignOutputRaw(json):
+    req = rpc_pb2.SignOutputRawRequest()
+    json_format.Parse(json, req)
+
+    #assert len(req.signDesc.pubKey) in [33, 0]
+    assert len(req.signDesc.doubleTweak) in [32, 0]
+    assert len(req.signDesc.sigHashes.hashPrevOuts) == 64
+    assert len(req.signDesc.sigHashes.hashSequence) == 64
+    assert len(req.signDesc.sigHashes.hashOutputs) == 64
+
+    m = rpc_pb2.SignOutputRawResponse()
+
+    m.signature = signOutputRaw(req.tx, req.signDesc)
+
+    msg = json_format.MessageToJson(m)
+    return msg
+
+
+def signOutputRaw(tx, signDesc):
+    pri = derivePrivKey(signDesc.keyDescriptor)
+    assert pri is not None
+    pri2 = maybeTweakPrivKey(signDesc, pri)
+    sig = rawTxInWitnessSignature(tx, signDesc.sigHashes, signDesc.inputIndex,
+                                  signDesc.output.value, signDesc.witnessScript, sigHashAll, pri2)
+    return sig[:len(sig) - 1]
+
+async def PublishTransaction(json):
+    req = rpc_pb2.PublishTransactionRequest()
+    json_format.Parse(json, req)
+    global NETWORK
+    tx = transaction.Transaction(binascii.hexlify(req.tx).decode("utf-8"))
+    suc, has = await NETWORK.broadcast_async(tx)
+    m = rpc_pb2.PublishTransactionResponse()
+    m.success = suc
+    m.error = str(has) if not suc else ""
+    if m.error:
+        print("PublishTransaction", m.error)
+        if "Missing inputs" in m.error:
+            print("inputs", tx.inputs())
+    return json_format.MessageToJson(m)
+
+
+def ComputeInputScript(json):
+    req = rpc_pb2.ComputeInputScriptRequest()
+    json_format.Parse(json, req)
+
+    #assert len(req.signDesc.pubKey) in [33, 0]
+    assert len(req.signDesc.doubleTweak) in [32, 0]
+    assert len(req.signDesc.sigHashes.hashPrevOuts) == 64
+    assert len(req.signDesc.sigHashes.hashSequence) == 64
+    assert len(req.signDesc.sigHashes.hashOutputs) == 64
+    # singleTweak , witnessScript variable length
+
+    try:
+        inpscr = computeInputScript(req.tx, req.signDesc)
+    except:
+        print("catched!")
+        traceback.print_exc()
+        return None
+
+    m = rpc_pb2.ComputeInputScriptResponse()
+
+    m.witnessScript.append(inpscr.witness[0])
+    m.witnessScript.append(inpscr.witness[1])
+    m.scriptSig = inpscr.scriptSig
+
+    msg = json_format.MessageToJson(m)
+    return msg
+
+
+def fetchPrivKey(str_address, keyLocatorFamily, keyLocatorIndex):
+    pri = None
+
+    if str_address is not None:
+        pri, redeem_script = WALLET.export_private_key(str_address, None)
+
+        if redeem_script:
+            print("ignoring redeem script", redeem_script)
+
+        typ, pri, compressed = bitcoin.deserialize_privkey(pri)
+        if keyLocatorFamily == 0 and keyLocatorIndex == 0: return EC_KEY(pri)
+
+        ks = keystore.BIP32_KeyStore({})
+        der = "m/0'/"
+        xtype = 'p2wpkh'
+        ks.add_xprv_from_seed(pri, xtype, der)
+    else:
+        ks = WALLET.keystore
+
+    if keyLocatorFamily != 0 or keyLocatorIndex != 0:
+        pri = ks.get_private_key([1017, keyLocatorFamily, keyLocatorIndex], password=None)[0]
+        pri = EC_KEY(pri)
+
+    assert pri is not None
+
+    return pri
+
+
+def computeInputScript(tx, signdesc):
+    typ, str_address = transaction.get_address_from_output_script(
+        signdesc.output.pkScript)
+    assert typ != bitcoin.TYPE_SCRIPT
+
+    assert len(signdesc.keyDescriptor.pubKey) == 0
+    pri = fetchPrivKey(str_address, signdesc.keyDescriptor.keyLocator.family, signdesc.keyDescriptor.keyLocator.index)
+
+    isNestedWitness = False  # because NewAddress only does native addresses
+
+    witnessProgram = None
+    ourScriptSig = None
+
+    if isNestedWitness:
+        pub = pri.get_public_key()
+
+        scr = bitcoin.hash_160(pub)
+
+        witnessProgram = b"\x00\x14" + scr
+
+        # \x14 is OP_20
+        ourScriptSig = b"\x16\x00\x14" + scr
+    else:
+        # TODO TEST
+        witnessProgram = signdesc.output.pkScript
+        ourScriptSig = b""
+        print("set empty ourScriptSig")
+        print("witnessProgram", witnessProgram)
+
+    # If a tweak (single or double) is specified, then we'll need to use
+    # this tweak to derive the final private key to be used for signing
+    # this output.
+    pri2 = maybeTweakPrivKey(signdesc, pri)
+
+    #
+    # Generate a valid witness stack for the input.
+    # TODO(roasbeef): adhere to passed HashType
+    witnessScript, pkData = witnessSignature(tx, signdesc.sigHashes,
+                                             signdesc.inputIndex, signdesc.output.value, witnessProgram,
+                                             sigHashAll, pri2, True)
+    return InputScript(witness=(witnessScript, pkData), scriptSig=ourScriptSig)
+
+from collections import namedtuple
+QueueItem = namedtuple("QueueItem", ["methodName", "args"])
+
+class LightningRPC(ForeverCoroutineJob):
+    def __init__(self):
+        super(LightningRPC, self).__init__()
+        self.queue = queue.Queue()
+        self.subscribers = []
+    # overridden
+    async def run(self, is_running):
+      print("RPC STARTED")
+      while is_running():
+        try:
+            qitem = self.queue.get(block=False)
+        except queue.Empty:
+            await asyncio.sleep(1)
+            pass
+        else:
+            def lightningRpcNetworkRequestThreadTarget(qitem):
+                applyMethodName = lambda x: functools.partial(x, qitem.methodName)
+                client = Server("http://" + machine + ":8090")
+                argumentStrings = [str(x) for x in qitem.args]
+                lightningSessionKey = base64.b64encode(privateKeyHash[:6]).decode("ascii")
+                resolvedMethod = getattr(client, qitem.methodName)
+                try:
+                    result = resolvedMethod(lightningSessionKey, *argumentStrings)
+                except BaseException as e:
+                    traceback.print_exc()
+                    for i in self.subscribers: applyMethodName(i)(e)
+                    raise
+                toprint = result
+                try:
+                    assert result["stderr"] == "" and result["returncode"] == 0, "LightningRPC detected error: " + result["stderr"]
+                    toprint = json.loads(result["stdout"])
+                    for i in self.subscribers: applyMethodName(i)(toprint)
+                except BaseException as e:
+                    traceback.print_exc()
+                    for i in self.subscribers: applyMethodName(i)(e)
+                if self.console:
+                    self.console.newResult.emit(json.dumps(toprint, indent=4))
+            threading.Thread(target=lightningRpcNetworkRequestThreadTarget, args=(qitem, )).start()
+    def setConsole(self, console):
+        self.console = console
+    def subscribe(self, notifyFunction):
+        self.subscribers.append(notifyFunction)
+    def clearSubscribers():
+        self.subscribers = []
+
+def lightningCall(rpc, methodName):
+    def fun(*args):
+        rpc.queue.put(QueueItem(methodName, args))
+    return fun
+
+class LightningUI():
+    def __init__(self, lightningGetter):
+        self.rpc = lightningGetter
+    def __getattr__(self, nam):
+        synced, local, server = isSynced()
+        if not synced:
+            return lambda *args: "Not synced yet: local/server: {}/{}".format(local, server)
+        return lightningCall(self.rpc(), nam)
+
+privateKeyHash = None
+
+class LightningWorker(ForeverCoroutineJob):
+    def __init__(self, wallet, network, config):
+        global privateKeyHash
+        super(LightningWorker, self).__init__()
+        self.server = None
+        self.wallet = wallet
+        self.network = network
+        self.config = config
+        ks = self.wallet().keystore
+        assert hasattr(ks, "xprv"), "Wallet must have xprv, can't be e.g. imported"
+        try:
+            xprv = ks.get_master_private_key(None)
+        except:
+            raise BaseException("Could not get master private key, is the wallet password protected?")
+        xprv, xpub = bitcoin.bip32_private_derivation(xprv, "m/", "m/152/152/152/152")
+        tupl = bitcoin.deserialize_xprv(xprv)
+        privKey = tupl[-1]
+        assert type(privKey) is type(bytes([]))
+        privateKeyHash = bitcoin.Hash(privKey)
+
+        deser = bitcoin.deserialize_xpub(wallet().keystore.xpub)
+        assert deser[0] == "p2wpkh", deser
+        self.subscribers = []
+
+    async def run(self, is_running):
+        global WALLET, NETWORK
+        global CONFIG
+
+        wasAlreadyUpToDate = False
+
+        while is_running():
+            WALLET = self.wallet()
+            NETWORK = self.network()
+            CONFIG = self.config()
+
+            synced, local, server = isSynced()
+            if not synced:
+                await asyncio.sleep(5)
+                continue
+            else:
+                if not wasAlreadyUpToDate:
+                    print("UP TO DATE FOR THE FIRST TIME")
+                    print(NETWORK.get_status_value("updated"))
+                wasAlreadyUpToDate = True
+
+            writer = None
+            try:
+                reader, writer = await asyncio.wait_for(asyncio.open_connection(machine, 1080), 5)
+                writer.write(b"MAGIC")
+                writer.write(privateKeyHash[:6])
+                await asyncio.wait_for(writer.drain(), 5)
+                while is_running():
+                    obj = await readJson(reader, is_running)
+                    if not obj: continue
+                    if "id" not in obj:
+                        print("Invoice update?", obj)
+                        for i in self.subscribers: i(obj)
+                        continue
+                    await asyncio.wait_for(readReqAndReply(obj, writer), 10)
+            except:
+                traceback.print_exc()
+                await asyncio.sleep(5)
+                continue
+    def subscribe(self, notifyFunction):
+        self.subscribers.append(functools.partial(notifyFunction, "LightningWorker"))
+
+async def readJson(reader, is_running):
+    data = b""
+    while is_running():
+      newlines = sum(1 if x == b"\n"[0] else 0 for x in data)
+      if newlines > 1: print("Too many newlines in Electrum/lightning.py!", data)
+      try:
+        return json.loads(data)
+      except ValueError:
+        if data != b"": print("parse failed, data has", data)
+        try:
+            data += await asyncio.wait_for(reader.read(2048), 1)
+        except TimeoutError:
+            continue
+
+async def readReqAndReply(obj, writer):
+    methods = [
+    # SecretKeyRing
+    DerivePrivKey,
+    DeriveNextKey,
+    DeriveKey,
+    ScalarMult
+    # Signer / BlockchainIO
+    ,ConfirmedBalance
+    ,NewAddress
+    ,ListUnspentWitness
+    ,WriteDb
+    ,FetchInputInfo
+    ,ComputeInputScript
+    ,SignOutputRaw
+    ,PublishTransaction
+    ,LockOutpoint
+    ,UnlockOutpoint
+    ,ListTransactionDetails
+    ,SendOutputs
+    ,IsSynced
+    ,SignMessage]
+    result = None
+    found = False
+    try:
+        for method in methods:
+            if method.__name__ == obj["method"]:
+                params = obj["params"][0]
+                print("calling method", obj["method"], "with", params)
+                if asyncio.iscoroutinefunction(method):
+                    result = await method(params)
+                else:
+                    result = method(params)
+                found = True
+                break
+    except BaseException as e:
+        traceback.print_exc()
+        print("exception while calling method", obj["method"])
+        writer.write(json.dumps({"id":obj["id"],"error": {"code": -32002, "message": traceback.format_exc()}}).encode("ascii") + b"\n")
+        await writer.drain()
+    else:
+        if not found:
+            # TODO assumes obj has id
+            writer.write(json.dumps({"id":obj["id"],"error": {"code": -32601, "message": "invalid method"}}).encode("ascii") + b"\n")
+        else:
+            print("result was", result)
+            if result is None:
+                result = "{}"
+            try:
+                assert type({}) is type(json.loads(result))
+            except:
+                traceback.print_exc()
+                print("wrong method implementation")
+                writer.write(json.dumps({"id":obj["id"],"error": {"code": -32000, "message": "wrong return type in electrum-lightning-hub"}}).encode("ascii") + b"\n")
+            else:
+                writer.write(json.dumps({"id":obj["id"],"result": result}).encode("ascii") + b"\n")
+        await writer.drain()
+
+def privKeyForPubKey(pubKey):
+    global globalIdx
+    priv_keys = WALLET.storage.get("lightning_extra_keys", [])
+    for i in priv_keys:
+        candidate = EC_KEY(i.to_bytes(32, "big"))
+        if pubkFromECKEY(candidate) == pubKey:
+            return candidate
+
+    attemptKeyIdx = globalIdx - 1
+    while attemptKeyIdx >= 0:
+      attemptPrivKey = fetchPrivKey(None, 9000, attemptKeyIdx)
+      attempt = pubkFromECKEY(attemptPrivKey)
+      if attempt == pubKey:
+        return attemptPrivKey
+      attemptKeyIdx -= 1
+
+    adr = bitcoin.pubkey_to_address('p2wpkh', binascii.hexlify(pubKey).decode("utf-8"))
+    pri, redeem_script = WALLET.export_private_key(adr, None)
+
+    if redeem_script:
+        print("ignoring redeem script", redeem_script)
+
+    typ, pri, compressed = bitcoin.deserialize_privkey(pri)
+    return EC_KEY(pri)
+    
+    #assert False, "could not find private key for pubkey {} hex={}".format(pubKey, binascii.hexlify(pubKey).decode("ascii"))
+
+def derivePrivKey(keyDesc):
+    keyDescFam = keyDesc.keyLocator.family
+    keyDescIdx = keyDesc.keyLocator.index
+    keyDescPubKey = keyDesc.pubKey
+    privKey = None
+
+    if len(keyDescPubKey) != 0:
+        return privKeyForPubKey(keyDescPubKey)
+
+    return fetchPrivKey(None, keyDescFam, keyDescIdx)
+
+def DerivePrivKey(json):
+    req = rpc_pb2.DerivePrivKeyRequest()
+    json_format.Parse(json, req)
+
+    m = rpc_pb2.DerivePrivKeyResponse()
+
+    m.privKey = derivePrivKey(req.keyDescriptor).secret.to_bytes(32, "big")
+
+    msg = json_format.MessageToJson(m)
+    return msg
+
+globalIdx = 0
+
+def DeriveNextKey(json):
+    global globalIdx
+    req = rpc_pb2.DeriveNextKeyRequest()
+    json_format.Parse(json, req)
+
+    family = req.keyFamily
+
+    m = rpc_pb2.DeriveNextKeyResponse()
+
+    # lnd leaves these unset:
+    # source: https://github.com/lightningnetwork/lnd/pull/769/files#diff-c954f5135a8995b1a3dfa298101dd0efR160
+    #m.keyDescriptor.keyLocator.family = 
+    #m.keyDescriptor.keyLocator.index = 
+
+    m.keyDescriptor.pubKey = pubkFromECKEY(fetchPrivKey(None, 9000, globalIdx))
+    globalIdx += 1
+
+    msg = json_format.MessageToJson(m)
+    return msg
+
+def DeriveKey(json):
+    req = rpc_pb2.DeriveKeyRequest()
+    json_format.Parse(json, req)
+
+    family = req.keyLocator.family
+    idx =  req.keyLocator.index
+
+    m = rpc_pb2.DeriveKeyResponse()
+
+    #lnd sets these to parameter values
+    m.keyDescriptor.keyLocator.family = family
+    m.keyDescriptor.keyLocator.index = index
+
+    m.keyDescriptor.pubKey = pubkFromECKEY(fetchPrivKey(None, family, index))
+
+    msg = json_format.MessageToJson(m)
+    return msg
+
+#// ScalarMult performs a scalar multiplication (ECDH-like operation) between
+#// the target key descriptor and remote public key. The output returned will be
+#// the sha256 of the resulting shared point serialized in compressed format. If
+#// k is our private key, and P is the public key, we perform the following
+#// operation:
+#//
+#//  sx := k*P s := sha256(sx.SerializeCompressed())
+def ScalarMult(json):
+    req = rpc_pb2.ScalarMultRequest()
+    json_format.Parse(json, req)
+
+    privKey = derivePrivKey(req.keyDescriptor)
+
+    point = bitcoin.ser_to_point(req.pubKey)
+
+    point = point * privKey.secret
+
+    c = hashlib.sha256()
+    c.update(bitcoin.point_to_ser(point, True))
+
+    m = rpc_pb2.ScalarMultResponse()
+
+    m.hashResult = c.digest()
+
+    msg = json_format.MessageToJson(m)
+    return msg
+
+def pubkFromECKEY(eckey):
+    return bytes(bytearray.fromhex(eckey.get_public_key(True))) #compressed=True

protoc_lightning.sh

@@ -0,0 +1,15 @@
+#!/bin/sh -ex
+if [ ! -d $HOME/go/src/github.com/grpc-ecosystem ]; then
+  # from readme in https://github.com/grpc-ecosystem/grpc-gateway
+  go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway
+  go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger
+  go get -u github.com/golang/protobuf/protoc-gen-go
+fi
+if [ ! -d $HOME/go/src/github.com/lightningnetwork/lnd ]; then
+  echo "You need an lnd with electrum-bridge (ysangkok/lnd maybe?) checked out since we implement the interface from there, and need it to generate code"
+  exit 1
+fi
+mkdir -p lib/ln || true
+touch lib/__init__.py
+~/go/bin/protoc -I$HOME/include -I$HOME/go/src/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis --python_out=lib/ln $HOME/go/src/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis/google/api/*.proto
+python3 -m grpc_tools.protoc -I $HOME/go/src/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis --proto_path $HOME/go/src/github.com/lightningnetwork/lnd/electrum-bridge --python_out=lib/ln --grpc_python_out=lib/ln ~/go/src/github.com/lightningnetwork/lnd/electrum-bridge/rpc.proto

testserver.py

@@ -0,0 +1,21 @@
+import asyncio
+
+async def handler(reader, writer):
+    magic = await reader.read(5+6)
+    await asyncio.sleep(5)
+    print("in five sec!")
+    await asyncio.sleep(5)
+    writer.write(b'{\n  "r_preimage": "6UNoNhDZ/0awtaDTM7KuCtlYcNkNljscxMLleoJv9+o=",\n  "r_hash": "lQDtsJlLe8IzSRk0hrJcgglwRdtkHzX6mIwOhJrN7Ck=",\n  "value": "8192",\n  "settled": true,\n  "creation_date": "1519994196",\n  "settle_date": "1519994199",\n  "payment_request": "lntb81920n1pdfj325pp5k7erq3avatceq8ca43h5uulxrhw2ma3a442a7c8fxrsw059c3m3sdqqcqzysdpwv4dn2xd74lfmea3taxj6pjfxrdl42t8w7ceptgv5ds0td0ypk47llryl6t4a48x54d7mnwremgcmljced4dhwty9g3pfywr307aqpwtkzf4",\n  "expiry": "3600",\n  "cltv_expiry": "144"\n}\n'.replace(b"\n",b""))
+    await writer.drain()
+    print(magic)
+
+async def handler2(reader, writer):
+    while True:
+        data = await reader.read(2048)
+        if data != b'':
+            writer.write(b"HTTP/1.0 200 OK\r\nContent-length: 16\r\n\r\n{\"result\":\"lol\"}")
+            await writer.drain()
+
+asyncio.ensure_future(asyncio.start_server(handler, "127.0.0.1", 1080))
+asyncio.ensure_future(asyncio.start_server(handler2, "127.0.0.1", 8090))
+asyncio.get_event_loop().run_forever()