[release-v2.1] main: Use backported wire updates.

go.mod

@@ -31,7 +31,7 @@ require (
 	github.com/decred/dcrd/rpc/jsonrpc/types/v4 v4.4.0
 	github.com/decred/dcrd/rpcclient/v8 v8.1.0
 	github.com/decred/dcrd/txscript/v4 v4.1.2
-	github.com/decred/dcrd/wire v1.7.2
+	github.com/decred/dcrd/wire v1.7.5
 	github.com/decred/dcrtest/dcrdtest v1.0.1-0.20240404170936-a2529e936df1
 	github.com/decred/go-socks v1.1.0
 	github.com/decred/slog v1.2.0

go.sum

@@ -66,8 +66,8 @@ github.com/decred/dcrd/rpcclient/v8 v8.1.0 h1:FLZ1j4ub7+O9oCIcKf+frYCrZW++G3FSzk
 github.com/decred/dcrd/rpcclient/v8 v8.1.0/go.mod h1:iTHqLrHnS2VLJPHQk7guy0BP3jKvMew9STDqWWhFNA4=
 github.com/decred/dcrd/txscript/v4 v4.1.2 h1:1EP7ZmBDl2LBeAMTEygxY8rVNN3+lkGqrsb4u64x+II=
 github.com/decred/dcrd/txscript/v4 v4.1.2/go.mod h1:r5/8qfCnl6TFrE369gggUayVIryM1oC7BLoRfa27Ckw=
-github.com/decred/dcrd/wire v1.7.2 h1:04vpHHE3t78rDztjZx82JV2EEOMDUtUUB1347H32kho=
-github.com/decred/dcrd/wire v1.7.2/go.mod h1:eP9XRsMloy+phlntkTAaAm611JgLv8NqY1YJoRxkNKU=
+github.com/decred/dcrd/wire v1.7.5 h1:fRaaB5CrwYWGI3YVv50XHm54lsU1TB40WnnIJ4W6aGM=
+github.com/decred/dcrd/wire v1.7.5/go.mod h1:NZK8QD5W2ObX6p+Q0TUzYNpQtk4Ov3pBIvc6ZUK88FU=
 github.com/decred/dcrtest/dcrdtest v1.0.1-0.20240404170936-a2529e936df1 h1:RbUvO7dsxdNgb2DvP2/h34eS2Ej1T4a7opzvOzz+YFI=
 github.com/decred/dcrtest/dcrdtest v1.0.1-0.20240404170936-a2529e936df1/go.mod h1:kbRQzyWu1IfukYZqCioVyJokzu1ifvIXzVDrXReeOsQ=
 github.com/decred/go-socks v1.1.0 h1:dnENcc0KIqQo3HSXdgboXAHgqsCIutkqq6ntQjYtm2U=

wire/bench_test.go

@@ -1,5 +1,5 @@
 // Copyright (c) 2013-2016 The btcsuite developers
-// Copyright (c) 2015-2025 The Decred developers
+// Copyright (c) 2015-2026 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -14,6 +14,7 @@ import (
 	"time"
 
 	"github.com/decred/dcrd/chaincfg/chainhash"
+	"github.com/decred/dcrd/crypto/blake256"
 )
 
 // genesisCoinbaseTx is the coinbase transaction for the genesis blocks for
@@ -634,6 +635,28 @@ func BenchmarkTxHash(b *testing.B) {
 	}
 }
 
+// BenchmarkTxHashReuseHasher performs a benchmark on how long it takes to hash a
+// transaction by reusing the *blake256.Hasher256 object.
+func BenchmarkTxHashReuseHasher(b *testing.B) {
+	h := blake256.NewHasher256()
+
+	txHash := func(h *blake256.Hasher256, tx *MsgTx) chainhash.Hash {
+		txCopy := *tx
+		txCopy.SerType = TxSerializeNoWitness
+		err := txCopy.Serialize(h)
+		if err != nil {
+			panic(err)
+		}
+		return h.Sum256()
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		h.Reset()
+		_ = txHash(h, &genesisCoinbaseTx)
+	}
+}
+
 // BenchmarkHashB performs a benchmark on how long it takes to perform a hash
 // returning a byte slice.
 func BenchmarkHashB(b *testing.B) {
@@ -676,3 +699,25 @@ func BenchmarkWriteMessageN(b *testing.B) {
 		}
 	}
 }
+
+// BenchmarkReadMessageN benchmarks the genesis coinbase deserialization using
+// the ReadMessageN function.
+func BenchmarkReadMessageN(b *testing.B) {
+	var buf bytes.Buffer
+	_, err := WriteMessageN(&buf, &genesisCoinbaseTx, ProtocolVersion, MainNet)
+	if err != nil {
+		b.Fatal(err)
+	}
+	msgBytes := buf.Bytes()
+
+	r := new(bytes.Reader)
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		r.Reset(msgBytes)
+		_, _, _, err := ReadMessageN(r, ProtocolVersion, MainNet)
+		if err != nil {
+			b.Fatalf("ReadMessageN: unexpected error: %v", err)
+		}
+	}
+}

wire/blockheader.go

@@ -1,5 +1,5 @@
 // Copyright (c) 2013-2016 The btcsuite developers
-// Copyright (c) 2015-2023 The Decred developers
+// Copyright (c) 2015-2026 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -11,6 +11,7 @@ import (
 	"time"
 
 	"github.com/decred/dcrd/chaincfg/chainhash"
+	"github.com/decred/dcrd/crypto/blake256"
 	"lukechampine.com/blake3"
 )
 
@@ -88,36 +89,37 @@ type BlockHeader struct {
 // header.
 const blockHeaderLen = 180
 
-// BlockHash computes the block identifier hash for the given block header.
+// BlockHash computes the BLAKE-256 block identifier hash for the given block
+// header.
 func (h *BlockHeader) BlockHash() chainhash.Hash {
 	// Encode the header and hash everything prior to the number of
 	// transactions.  Ignore the error returns since there is no way the encode
 	// could fail except being out of memory which would cause a run-time panic.
-	buf := bytes.NewBuffer(make([]byte, 0, MaxBlockHeaderPayload))
-	_ = writeBlockHeader(buf, 0, h)
-
-	return chainhash.HashH(buf.Bytes())
+	hasher := blake256.NewHasher256()
+	_ = writeBlockHeader(hasher, 0, h)
+	return hasher.Sum256()
 }
 
-// PowHashV1 calculates and returns the version 1 proof of work hash for the
-// block header.
+// PowHashV1 calculates and returns the version 1 proof of work BLAKE-256 hash
+// for the block header.
 //
 // NOTE: This is the original proof of work hash function used at Decred launch
 // and applies to all blocks prior to the activation of DCP0011.
 func (h *BlockHeader) PowHashV1() chainhash.Hash {
 	return h.BlockHash()
 }
 
-// PowHashV2 calculates and returns the version 2 proof of work hash as defined
-// in DCP0011 for the block header.
+// PowHashV2 calculates and returns the version 2 proof of work BLAKE3 hash as
+// defined in DCP0011 for the block header.
 func (h *BlockHeader) PowHashV2() chainhash.Hash {
 	// Encode the header and hash everything prior to the number of
 	// transactions.  Ignore the error returns since there is no way the encode
 	// could fail except being out of memory which would cause a run-time panic.
-	buf := bytes.NewBuffer(make([]byte, 0, MaxBlockHeaderPayload))
-	_ = writeBlockHeader(buf, 0, h)
-
-	return blake3.Sum256(buf.Bytes())
+	var digest chainhash.Hash
+	hasher := blake3.New(len(digest), nil)
+	_ = writeBlockHeader(hasher, 0, h)
+	hasher.Sum(digest[:0])
+	return digest
 }
 
 // BtcDecode decodes r using the bitcoin protocol encoding into the receiver.