From 103ab8690416996b685a0380836b71210ef78b8f Mon Sep 17 00:00:00 2001
From: Brannon King <countprimes@gmail.com>
Date: Fri, 10 Sep 2021 16:15:15 -0400
Subject: [PATCH] fix regtest difficulty

---
 blockchain/difficulty.go | 7 ++++---
 cmd/lbcctl/config.go     | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/blockchain/difficulty.go b/blockchain/difficulty.go
index 2f16e2e5..051998ba 100644
--- a/blockchain/difficulty.go
+++ b/blockchain/difficulty.go
@@ -245,10 +245,11 @@ func (b *BlockChain) calcNextRequiredDifficulty(lastNode *blockNode, newBlockTim
 
 	// Get the block node at the previous retarget (targetTimespan days
 	// worth of blocks).
-	firstNode := lastNode.RelativeAncestor(b.blocksPerRetarget)
-	if lastNode.height == 0 {
-		firstNode = lastNode
+	blocksBack := b.blocksPerRetarget
+	if blocksBack > lastNode.height {
+		blocksBack = lastNode.height
 	}
+	firstNode := lastNode.RelativeAncestor(blocksBack)
 	if firstNode == nil {
 		return 0, AssertError("unable to obtain previous retarget block")
 	}
diff --git a/cmd/lbcctl/config.go b/cmd/lbcctl/config.go
index bab6bb18..b2f77447 100644
--- a/cmd/lbcctl/config.go
+++ b/cmd/lbcctl/config.go
@@ -137,7 +137,7 @@ func normalizeAddress(addr string, chain *chaincfg.Params, useWallet bool) (stri
 				paramErr := fmt.Errorf("cannot use -wallet with -regtest, btcwallet not yet compatible with regtest")
 				return "", paramErr
 			} else {
-				defaultPort = "18334"
+				defaultPort = "29245"
 			}
 		case &chaincfg.SigNetParams:
 			if useWallet {