xplorfin · jakesylvestre · Aug 29, 2020 · Feb 10, 2020 · Mar 3, 2020 · Jan 22, 2020
diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
@@ -0,0 +1,27 @@
+name: Build and Test
+on: [push, pull_request]
+jobs:
+  build:
+    name: Go CI
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go: [1.13, 1.14]
+    steps:
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go }}
+      - name: Check out source
+        uses: actions/checkout@v2
+      - name: Install Linters
+        run: "curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.26.0"
+      - name: Build
+        env:
+          GO111MODULE: "on"
+        run: go build ./...
+      - name: Test
+        env:
+          GO111MODULE: "on"
+        run: |
+          sh ./goclean.sh
diff --git a/.travis.yml b/.travis.yml
diff --git a/CHANGES b/CHANGES
@@ -3,6 +3,161 @@ User visible changes for btcd
   A full-node bitcoin implementation written in Go
 ============================================================================
 
+Changes in 0.21.0 (Thu Aug 27 2020)
+  - Network-related changes:
+    - Handle notfound messages from peers in netsync package (#1603)
+  - RPC changes:
+    - Add compatibility for getblock RPC changes in bitcoind 0.15.0 (#1529)
+    - Add new optional Params field to rpcclient.ConnConfig (#1467)
+    - Add new error code ErrRPCInWarmup in btcjson (#1541)
+    - Add compatibility for changes to getmempoolentry response in bitcoind
+      0.19.0 (#1524)
+    - Add rpcclient methods for estimatesmartfee and generatetoaddress
+      commands (#1500)
+    - Add rpcclient method for getblockstats command (#1500)
+    - Parse serialized transaction from createrawtransaction command using
+      both segwit, and legacy format (#1502)
+    - Support cookie-based authentication in rpcclient (#1460)
+    - Add rpcclient method for getchaintxstats command (#1571)
+    - Add rpcclient method for fundrawtransaction command (#1553)
+    - Add rpcclient method for getbalances command (#1595)
+    - Add new method rpcclient.GetTransactionWatchOnly (#1592)
+  - Crypto changes:
+    - Fix panic in fieldVal.SetByteSlice when called with large values, and
+      improve the method to be 35% faster (#1602)
+  - btcctl changes:
+    - Added -regtest mode to btcctl (#1556)
+  - Misc changes:
+    - Fix a bug due to a deadlock in connmgr's dynamic ban scoring (#1509)
+    - Add blockchain.NewUtxoEntry() to directly create entries for
+      UtxoViewpoint (#1588)
+    - Replace LRU cache implementation in peer package with a generic one
+      from decred/dcrd (#1599)
+  - Contributors (alphabetical order):
+    - Anirudha Bose
+    - Antonin Hildebrand
+    - Dan Cline
+    - Daniel McNally
+    - David Hill
+    - Federico Bond
+    - George Tankersley
+    - Henry
+    - Henry Harder
+    - Iskander Sharipov
+    - Ivan Kuznetsov
+    - Jake Sylvestre
+    - Javed Khan
+    - JeremyRand
+    - Jin
+    - John C. Vernaleo
+    - Kulpreet Singh
+    - Mikael Lindlof
+    - Murray Nesbitt
+    - Nisen
+    - Olaoluwa Osuntokun
+    - Oliver Gugger
+    - Steven Roose
+    - Torkel Rogstad
+    - Tyler Chambers
+    - Wilmer Paulino
+    - Yash Bhutwala
+    - adiabat
+    - jalavosus
+    - mohanson
+    - qqjettkgjzhxmwj
+    - qshuai
+    - shuai.qi
+    - tpkeeper
+
+Changes in v0.20.1 (Wed Nov 13 2019)
+  - RPC changes:
+    - Add compatibility for bitcoind v0.19.0 in rpcclient and btcjson
+      packages (#1484)
+  - Contributors (alphabetical order):
+    - Eugene Zeigel
+    - Olaoluwa Osuntokun
+    - Wilmer Paulino
+
+Changes in v0.20.0 (Tue Oct 15 2019)
+  - Significant changes made since 0.12.0. See git log or refer to release
+    notes on GitHub for full details.
+  - Contributors (alphabetical order):
+    - Albert Puigsech Galicia
+    - Alex Akselrod
+    - Alex Bosworth
+    - Alex Manuskin
+    - Alok Menghrajani
+    - Anatoli Babenia
+    - Andy Weidenbaum
+    - Calvin McAnarney
+    - Chris Martin
+    - Chris Pacia
+    - Chris Shepherd
+    - Conner Fromknecht
+    - Craig Sturdy
+    - Cédric Félizard
+    - Daniel Krawisz
+    - Daniel Martí
+    - Daniel McNally
+    - Dario Nieuwenhuis
+    - Dave Collins
+    - David Hill
+    - David de Kloet
+    - GeertJohan
+    - Grace Noah
+    - Gregory Trubetskoy
+    - Hector Jusforgues
+    - Iskander (Alex) Sharipov
+    - Janus Troelsen
+    - Jasper
+    - Javed Khan
+    - Jeremiah Goyette
+    - Jim Posen
+    - Jimmy Song
+    - Johan T. Halseth
+    - John C. Vernaleo
+    - Jonathan Gillham
+    - Josh Rickmar
+    - Jon Underwood
+    - Jonathan Zeppettini
+    - Jouke Hofman
+    - Julian Meyer
+    - Kai
+    - Kamil Slowikowski
+    - Kefkius
+    - Leonardo Lazzaro
+    - Marco Peereboom
+    - Marko Bencun
+    - Mawueli Kofi Adzoe
+    - Michail Kargakis
+    - Mitchell Paull
+    - Nathan Bass
+    - Nicola 'tekNico' Larosa
+    - Olaoluwa Osuntokun
+    - Pedro Martelletto
+    - Ricardo Velhote
+    - Roei Erez
+    - Ruben de Vries
+    - Rune T. Aune
+    - Sad Pencil
+    - Shuai Qi
+    - Steven Roose
+    - Tadge Dryja
+    - Tibor Bősze
+    - Tomás Senart
+    - Tzu-Jung Lee
+    - Vadym Popov
+    - Waldir Pimenta
+    - Wilmer Paulino
+    - benma
+    - danda
+    - dskloet
+    - esemplastic
+    - jadeblaquiere
+    - nakagawa
+    - preminem
+    - qshuai
+
 Changes in 0.12.0 (Fri Nov 20 2015)
   - Protocol and network related changes:
     - Add a new checkpoint at block height 382320 (#555)

diff --git a/README.md b/README.md
@@ -1,9 +1,9 @@
 btcd
 ====
 
-[![Build Status](https://travis-ci.org/btcsuite/btcd.png?branch=master)](https://travis-ci.org/btcsuite/btcd)
-[![ISC License](http://img.shields.io/badge/license-ISC-blue.svg)](http://copyfree.org)
-[![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg)](http://godoc.org/github.com/btcsuite/btcd)
+[![Build Status](https://github.com/btcsuite/btcd/workflows/Build%20and%20Test/badge.svg)](https://github.com/btcsuite/btcd/actions)
+[![ISC License](https://img.shields.io/badge/license-ISC-blue.svg)](http://copyfree.org)
+[![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg)](https://godoc.org/github.com/btcsuite/btcd)
 
 btcd is an alternative full node bitcoin implementation written in Go (golang).
 

diff --git a/blockchain/chainio.go b/blockchain/chainio.go
@@ -1149,18 +1149,9 @@ func (b *BlockChain) initChainState() error {
 
 		blockIndexBucket := dbTx.Metadata().Bucket(blockIndexBucketName)
 
-		// Determine how many blocks will be loaded into the index so we can
-		// allocate the right amount.
-		var blockCount int32
-		cursor := blockIndexBucket.Cursor()
-		for ok := cursor.First(); ok; ok = cursor.Next() {
-			blockCount++
-		}
-		blockNodes := make([]blockNode, blockCount)
-
 		var i int32
 		var lastNode *blockNode
-		cursor = blockIndexBucket.Cursor()
+		cursor := blockIndexBucket.Cursor()
 		for ok := cursor.First(); ok; ok = cursor.Next() {
 			header, status, err := deserializeBlockRow(cursor.Value())
 			if err != nil {
@@ -1193,7 +1184,7 @@ func (b *BlockChain) initChainState() error {
 
 			// Initialize the block node for the block, connect it,
 			// and add it to the block index.
-			node := &blockNodes[i]
+			node := new(blockNode)
 			initBlockNode(node, header, parent)
 			node.status = status
 			b.index.addNode(node)

diff --git a/blockchain/difficulty_test.go b/blockchain/difficulty_test.go
@@ -63,7 +63,7 @@ func TestCalcWork(t *testing.T) {
 	}
 
 	for x, test := range tests {
-		bits := uint32(test.in)
+		bits := test.in
 
 		r := CalcWork(bits)
 		if r.Int64() != test.out {

diff --git a/blockchain/indexers/addrindex.go b/blockchain/indexers/addrindex.go
@@ -155,7 +155,9 @@ func serializeAddrIndexEntry(blockID uint32, txLoc wire.TxLoc) []byte {
 // provided region struct according to the format described in detail above and
 // uses the passed block hash fetching function in order to conver the block ID
 // to the associated block hash.
-func deserializeAddrIndexEntry(serialized []byte, region *database.BlockRegion, fetchBlockHash fetchBlockHashFunc) error {
+func deserializeAddrIndexEntry(serialized []byte, region *database.BlockRegion,
+	fetchBlockHash fetchBlockHashFunc) error {
+
 	// Ensure there are enough bytes to decode.
 	if len(serialized) < txEntrySize {
 		return errDeserialize("unexpected end of data")
@@ -182,7 +184,9 @@ func keyForLevel(addrKey [addrKeySize]byte, level uint8) [levelKeySize]byte {
 
 // dbPutAddrIndexEntry updates the address index to include the provided entry
 // according to the level-based scheme described in detail above.
-func dbPutAddrIndexEntry(bucket internalBucket, addrKey [addrKeySize]byte, blockID uint32, txLoc wire.TxLoc) error {
+func dbPutAddrIndexEntry(bucket internalBucket, addrKey [addrKeySize]byte,
+	blockID uint32, txLoc wire.TxLoc) error {
+
 	// Start with level 0 and its initial max number of entries.
 	curLevel := uint8(0)
 	maxLevelBytes := level0MaxEntries * txEntrySize
@@ -253,7 +257,10 @@ func dbPutAddrIndexEntry(bucket internalBucket, addrKey [addrKeySize]byte, block
 // the given address key and the number of entries skipped since it could have
 // been less in the case where there are less total entries than the requested
 // number of entries to skip.
-func dbFetchAddrIndexEntries(bucket internalBucket, addrKey [addrKeySize]byte, numToSkip, numRequested uint32, reverse bool, fetchBlockHash fetchBlockHashFunc) ([]database.BlockRegion, uint32, error) {
+func dbFetchAddrIndexEntries(bucket internalBucket, addrKey [addrKeySize]byte,
+	numToSkip, numRequested uint32, reverse bool,
+	fetchBlockHash fetchBlockHashFunc) ([]database.BlockRegion, uint32, error) {
+
 	// When the reverse flag is not set, all levels need to be fetched
 	// because numToSkip and numRequested are counted from the oldest
 	// transactions (highest level) and thus the total count is needed.
@@ -356,7 +363,9 @@ func maxEntriesForLevel(level uint8) int {
 // dbRemoveAddrIndexEntries removes the specified number of entries from from
 // the address index for the provided key.  An assertion error will be returned
 // if the count exceeds the total number of entries in the index.
-func dbRemoveAddrIndexEntries(bucket internalBucket, addrKey [addrKeySize]byte, count int) error {
+func dbRemoveAddrIndexEntries(bucket internalBucket, addrKey [addrKeySize]byte,
+	count int) error {
+
 	// Nothing to do if no entries are being deleted.
 	if count <= 0 {
 		return nil
@@ -796,7 +805,9 @@ func (idx *AddrIndex) DisconnectBlock(dbTx database.Tx, block *btcutil.Block,
 // that involve a given address.
 //
 // This function is safe for concurrent access.
-func (idx *AddrIndex) TxRegionsForAddress(dbTx database.Tx, addr btcutil.Address, numToSkip, numRequested uint32, reverse bool) ([]database.BlockRegion, uint32, error) {
+func (idx *AddrIndex) TxRegionsForAddress(dbTx database.Tx, addr btcutil.Address,
+	numToSkip, numRequested uint32, reverse bool) ([]database.BlockRegion, uint32, error) {
+
 	addrKey, err := addrToKey(addr)
 	if err != nil {
 		return nil, 0, err

diff --git a/blockchain/indexers/addrindex_test.go b/blockchain/indexers/addrindex_test.go
@@ -68,7 +68,7 @@ func (b *addrIndexBucket) printLevels(addrKey [addrKeySize]byte) string {
 		if !bytes.Equal(k[:levelOffset], addrKey[:]) {
 			continue
 		}
-		level := uint8(k[levelOffset])
+		level := k[levelOffset]
 		if level > highestLevel {
 			highestLevel = level
 		}
@@ -105,7 +105,7 @@ func (b *addrIndexBucket) sanityCheck(addrKey [addrKeySize]byte, expectedTotal i
 		if !bytes.Equal(k[:levelOffset], addrKey[:]) {
 			continue
 		}
-		level := uint8(k[levelOffset])
+		level := k[levelOffset]
 		if level > highestLevel {
 			highestLevel = level
 		}

diff --git a/blockchain/utxoviewpoint.go b/blockchain/utxoviewpoint.go
@@ -111,6 +111,22 @@ func (entry *UtxoEntry) Clone() *UtxoEntry {
 	}
 }
 
+// NewUtxoEntry returns a new UtxoEntry built from the arguments.
+func NewUtxoEntry(
+	txOut *wire.TxOut, blockHeight int32, isCoinbase bool) *UtxoEntry {
+	var cbFlag txoFlags
+	if isCoinbase {
+		cbFlag |= tfCoinBase
+	}
+
+	return &UtxoEntry{
+		amount:      txOut.Value,
+		pkScript:    txOut.PkScript,
+		blockHeight: blockHeight,
+		packedFlags: cbFlag,
+	}
+}
+
 // UtxoViewpoint represents a view into the set of unspent transaction outputs
 // from a specific point of view in the chain.  For example, it could be for
 // the end of the main chain, some point in the history of the main chain, or

diff --git a/btcec/field.go b/btcec/field.go
@@ -226,20 +226,24 @@ func (f *fieldVal) SetBytes(b *[32]byte) *fieldVal {
 	return f
 }
 
-// SetByteSlice packs the passed big-endian value into the internal field value
-// representation.  Only the first 32-bytes are used.  As a result, it is up to
-// the caller to ensure numbers of the appropriate size are used or the value
-// will be truncated.
+// SetByteSlice interprets the provided slice as a 256-bit big-endian unsigned
+// integer (meaning it is truncated to the first 32 bytes), packs it into the
+// internal field value representation, and returns the updated field value.
+//
+// Note that since passing a slice with more than 32 bytes is truncated, it is
+// possible that the truncated value is less than the field prime.  It is up to
+// the caller to decide whether it needs to provide numbers of the appropriate
+// size or if it is acceptable to use this function with the described
+// truncation behavior.
 //
 // The field value is returned to support chaining.  This enables syntax like:
 // f := new(fieldVal).SetByteSlice(byteSlice)
 func (f *fieldVal) SetByteSlice(b []byte) *fieldVal {
 	var b32 [32]byte
-	for i := 0; i < len(b); i++ {
-		if i < 32 {
-			b32[i+(32-len(b))] = b[i]
-		}
+	if len(b) > 32 {
+		b = b[:32]
 	}
+	copy(b32[32-len(b):], b)
 	return f.SetBytes(&b32)
 }