feat: Add testnet4 chain support

.gitignore

@@ -46,6 +46,8 @@ btcutil/psbt/coverage.txt
 *.swo
 /.vim
 
+.idea
+
 # Binaries produced by "make build"
 /addblock
 /btcctl

chaincfg/genesis.go

@@ -143,6 +143,77 @@ var testNet3GenesisBlock = wire.MsgBlock{
 	Transactions: []*wire.MsgTx{&genesisCoinbaseTx},
 }
 
+// testNet4GenesisTx is the transaction for the genesis blocks for test network (version 4).
+var testNet4GenesisTx = wire.MsgTx{
+	Version: 1,
+	TxIn: []*wire.TxIn{
+		{
+			PreviousOutPoint: wire.OutPoint{
+				Hash:  chainhash.Hash{},
+				Index: 0xffffffff,
+			},
+			SignatureScript: []byte{
+				// Message: `03/May/2024 000000000000000000001ebd58c244970b3aa9d783bb001011fbe8ea8e98e00e`
+				0x4, 0xff, 0xff, 0x0, 0x1d, 0x1, 0x4, 0x4c,
+				0x4c, 0x30, 0x33, 0x2f, 0x4d, 0x61, 0x79, 0x2f,
+				0x32, 0x30, 0x32, 0x34, 0x20, 0x30, 0x30, 0x30,
+				0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
+				0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
+				0x30, 0x31, 0x65, 0x62, 0x64, 0x35, 0x38, 0x63,
+				0x32, 0x34, 0x34, 0x39, 0x37, 0x30, 0x62, 0x33,
+				0x61, 0x61, 0x39, 0x64, 0x37, 0x38, 0x33, 0x62,
+				0x62, 0x30, 0x30, 0x31, 0x30, 0x31, 0x31, 0x66,
+				0x62, 0x65, 0x38, 0x65, 0x61, 0x38, 0x65, 0x39,
+				0x38, 0x65, 0x30, 0x30, 0x65},
+			Sequence: 0xffffffff,
+		},
+	},
+	TxOut: []*wire.TxOut{
+		{
+			Value: 0x12a05f200,
+			PkScript: []byte{
+				0x21, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+				0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+				0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+				0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+				0x0, 0x0, 0xac},
+		},
+	},
+	LockTime: 0,
+}
+
+// testNet4GenesisHash is the hash of the first block in the block chain for the
+// test network (version 4).
+var testNet4GenesisHash = chainhash.Hash([chainhash.HashSize]byte{
+	0x43, 0xf0, 0x8b, 0xda, 0xb0, 0x50, 0xe3, 0x5b,
+	0x56, 0x7c, 0x86, 0x4b, 0x91, 0xf4, 0x7f, 0x50,
+	0xae, 0x72, 0x5a, 0xe2, 0xde, 0x53, 0xbc, 0xfb,
+	0xba, 0xf2, 0x84, 0xda, 0x00, 0x00, 0x00, 0x00})
+
+// testNet4GenesisMerkleRoot is the hash of the first transaction in the genesis
+// block for the test network (version 4).  It is the same as the merkle root
+// for the main network.
+var testNet4GenesisMerkleRoot = chainhash.Hash([chainhash.HashSize]byte{ // Make go vet happy.
+	0x4e, 0x7b, 0x2b, 0x91, 0x28, 0xfe, 0x02, 0x91,
+	0xdb, 0x06, 0x93, 0xaf, 0x2a, 0xe4, 0x18, 0xb7,
+	0x67, 0xe6, 0x57, 0xcd, 0x40, 0x7e, 0x80, 0xcb,
+	0x14, 0x34, 0x22, 0x1e, 0xae, 0xa7, 0xa0, 0x7a,
+})
+
+// testNet4GenesisBlock defines the genesis block of the block chain which
+// serves as the public transaction ledger for the test network (version 3).
+var testNet4GenesisBlock = wire.MsgBlock{
+	Header: wire.BlockHeader{
+		Version:    1,
+		PrevBlock:  chainhash.Hash{},          // 0000000000000000000000000000000000000000000000000000000000000000
+		MerkleRoot: testNet4GenesisMerkleRoot, // 4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b
+		Timestamp:  time.Unix(1714777860, 0),  // 2024-05-03 23:11:00 +0000 UTC
+		Bits:       0x1d00ffff,                // 486604799 [00000000ffff0000000000000000000000000000000000000000000000000000]
+		Nonce:      0x17780cbb,                // 393743547
+	},
+	Transactions: []*wire.MsgTx{&testNet4GenesisTx},
+}
+
 // simNetGenesisHash is the hash of the first block in the block chain for the
 // simulation test network.
 var simNetGenesisHash = chainhash.Hash([chainhash.HashSize]byte{ // Make go vet happy.

chaincfg/genesis_test.go

@@ -6,6 +6,7 @@ package chaincfg
 
 import (
 	"bytes"
+	"github.com/stretchr/testify/require"
 	"testing"
 
 	"github.com/davecgh/go-spew/spew"
@@ -91,6 +92,34 @@ func TestTestNet3GenesisBlock(t *testing.T) {
 	}
 }
 
+// TestTestNet4GenesisBlock tests the genesis block of the test network (version
+// 4) for validity by checking the encoded bytes and hashes.
+func TestTestNet4GenesisBlock(t *testing.T) {
+	// Encode the genesis block to raw bytes.
+	var buf bytes.Buffer
+	err := TestNet4Params.GenesisBlock.Serialize(&buf)
+	if err != nil {
+		t.Fatalf("TestTestNet4GenesisBlock: %v", err)
+	}
+
+	// Ensure the encoded block matches the expected bytes.
+	if !bytes.Equal(buf.Bytes(), testNet4GenesisBlockBytes) {
+		t.Fatalf("TestTestNet4GenesisBlock: Genesis block does not "+
+			"appear valid - got %v, want %v",
+			spew.Sdump(buf.Bytes()),
+			spew.Sdump(testNet4GenesisBlockBytes))
+	}
+
+	// Check hash of the block against expected hash.
+	hash := TestNet4Params.GenesisBlock.BlockHash()
+	if !TestNet4Params.GenesisHash.IsEqual(&hash) {
+		t.Fatalf("TestTestNet4GenesisBlock: Genesis block hash does "+
+			"not appear valid - got %v, want %v", spew.Sdump(hash),
+			spew.Sdump(TestNet4Params.GenesisHash))
+	}
+	require.Equal(t, "00000000da84f2bafbbc53dee25a72ae507ff4914b867c565be350b0da8bf043", hash.String())
+}
+
 // TestSimNetGenesisBlock tests the genesis block of the simulation test network
 // for validity by checking the encoded bytes and hashes.
 func TestSimNetGenesisBlock(t *testing.T) {
@@ -268,6 +297,44 @@ var testNet3GenesisBlockBytes = []byte{
 	0xac, 0x00, 0x00, 0x00, 0x00, /* |.....|    */
 }
 
+// testNet4GenesisBlockBytes are the wire encoded bytes for the genesis block of
+// the test network (version 4)
+var testNet4GenesisBlockBytes = []byte{
+	0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x4e, 0x7b, 0x2b, 0x91,
+	0x28, 0xfe, 0x02, 0x91, 0xdb, 0x06, 0x93, 0xaf,
+	0x2a, 0xe4, 0x18, 0xb7, 0x67, 0xe6, 0x57, 0xcd,
+	0x40, 0x7e, 0x80, 0xcb, 0x14, 0x34, 0x22, 0x1e,
+	0xae, 0xa7, 0xa0, 0x7a, 0x04, 0x6f, 0x35, 0x66,
+	0xff, 0xff, 0x00, 0x1d, 0xbb, 0x0c, 0x78, 0x17,
+	0x01, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
+	0xff, 0xff, 0x55, 0x04, 0xff, 0xff, 0x00, 0x1d,
+	0x01, 0x04, 0x4c, 0x4c, 0x30, 0x33, 0x2f, 0x4d,
+	0x61, 0x79, 0x2f, 0x32, 0x30, 0x32, 0x34, 0x20,
+	0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
+	0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
+	0x30, 0x30, 0x30, 0x30, 0x31, 0x65, 0x62, 0x64,
+	0x35, 0x38, 0x63, 0x32, 0x34, 0x34, 0x39, 0x37,
+	0x30, 0x62, 0x33, 0x61, 0x61, 0x39, 0x64, 0x37,
+	0x38, 0x33, 0x62, 0x62, 0x30, 0x30, 0x31, 0x30,
+	0x31, 0x31, 0x66, 0x62, 0x65, 0x38, 0x65, 0x61,
+	0x38, 0x65, 0x39, 0x38, 0x65, 0x30, 0x30, 0x65,
+	0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0xf2, 0x05,
+	0x2a, 0x01, 0x00, 0x00, 0x00, 0x23, 0x21, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0xac, 0x00, 0x00, 0x00, 0x00,
+}
+
 // simNetGenesisBlockBytes are the wire encoded bytes for the genesis block of
 // the simulation test network as of protocol version 70002.
 var simNetGenesisBlockBytes = []byte{

chaincfg/params.go

@@ -673,6 +673,86 @@ var TestNet3Params = Params{
 	HDCoinType: 1,
 }
 
+var TestNet4Params = Params{
+	Name:        "testnet4",
+	Net:         wire.TestNet4,
+	DefaultPort: "48333",
+	DNSSeeds: []DNSSeed{
+		{"seed.testnet4.bitcoin.sprovoost.nl", true},
+		{"seed.testnet4.wiz.biz", true},
+	},
+
+	//// Chain parameters
+	GenesisBlock:             &testNet4GenesisBlock,
+	GenesisHash:              &testNet4GenesisHash,
+	PowLimit:                 testNet3PowLimit,
+	PowLimitBits:             0x1d00ffff,
+	BIP0034Height:            1,
+	BIP0065Height:            1,
+	BIP0066Height:            1,
+	CoinbaseMaturity:         100,
+	SubsidyReductionInterval: 210000,
+	TargetTimespan:           time.Hour * 24 * 14, // 14 days
+	TargetTimePerBlock:       time.Minute * 10,    // 10 minutes
+	RetargetAdjustmentFactor: 4,                   // 25% less, 400% more
+	ReduceMinDifficulty:      true,
+	MinDiffReductionTime:     time.Minute * 20, // TargetTimePerBlock * 2
+	GenerateSupported:        false,
+
+	// Checkpoints ordered from oldest to newest.
+	Checkpoints: []Checkpoint{},
+
+	// Consensus rule change deployments.
+	//
+	// The miner confirmation window is defined as:
+	//   target proof of work timespan / target proof of work spacing
+	RuleChangeActivationThreshold: 1512, // 75% of MinerConfirmationWindow
+	MinerConfirmationWindow:       2016,
+	Deployments: [DefinedDeployments]ConsensusDeployment{
+		DeploymentTestDummy: {
+			BitNumber: 28,
+			DeploymentStarter: NewMedianTimeDeploymentStarter(
+				time.Unix(1199145601, 0), // January 1, 2008 UTC
+			),
+			DeploymentEnder: NewMedianTimeDeploymentEnder(
+				time.Unix(1230767999, 0), // December 31, 2008 UTC
+			),
+		},
+		DeploymentTaproot: {
+			BitNumber: 2,
+			DeploymentStarter: NewMedianTimeDeploymentStarter(
+				time.Unix(0, 0), // Always true
+			),
+			DeploymentEnder: NewMedianTimeDeploymentEnder(
+				time.Unix(0, 0), // Always true
+			),
+			MinActivationHeight: 0,
+		},
+	},
+
+	// Mempool parameters
+	RelayNonStdTxs: true,
+
+	// Human-readable part for Bech32 encoded segwit addresses, as defined in
+	// BIP 173.
+	Bech32HRPSegwit: "tb", // always tb for test net
+
+	// Address encoding magics
+	PubKeyHashAddrID:        0x6f, // starts with m or n
+	ScriptHashAddrID:        0xc4, // starts with 2
+	WitnessPubKeyHashAddrID: 0x03, // starts with QW
+	WitnessScriptHashAddrID: 0x28, // starts with T7n
+	PrivateKeyID:            0xef, // starts with 9 (uncompressed) or c (compressed)
+
+	// BIP32 hierarchical deterministic extended key magics
+	HDPrivateKeyID: [4]byte{0x04, 0x35, 0x83, 0x94}, // starts with tprv
+	HDPublicKeyID:  [4]byte{0x04, 0x35, 0x87, 0xcf}, // starts with tpub
+
+	// BIP44 coin type used in the hierarchical deterministic path for
+	// address generation.
+	HDCoinType: 1,
+}
+
 // SimNetParams defines the network parameters for the simulation test Bitcoin
 // network.  This network is similar to the normal test network except it is
 // intended for private use within a group of individuals doing simulation
@@ -1075,6 +1155,7 @@ func init() {
 	// Register all default networks when the package is initialized.
 	mustRegister(&MainNetParams)
 	mustRegister(&TestNet3Params)
+	mustRegister(&TestNet4Params)
 	mustRegister(&RegressionNetParams)
 	mustRegister(&SimNetParams)
 }