github.com/mit-dci/lit@v0.0.0-20221102210550-8c3d3b49f2ce/coinparam/bitcoin.go

package coinparam

import (
	"time"

	"github.com/mit-dci/lit/btcutil/chaincfg/chainhash"
	"github.com/mit-dci/lit/wire"
)

// MainNetParams defines the network parameters for the main Bitcoin network.
var BitcoinParams = Params{
	Name:          "bitcoin",
	NetMagicBytes: 0xd9b4bef9,
	DefaultPort:   "8333",
	DNSSeeds: []string{
		"seed.bitcoin.sipa.be",
		"dnsseed.bluematt.me",
		"dnsseed.bitcoin.dashjr.org",
		"seed.bitcoinstats.com",
		"seed.bitnodes.io",
		"bitseed.xf2.org",
		"seed.bitcoin.jonasschnelli.ch",
	},

	// Chain parameters
	GenesisBlock: &genesisBlock,
	GenesisHash:  &genesisHash,
	PoWFunction: func(b []byte, height int32) chainhash.Hash {
		return chainhash.DoubleHashH(b)
	},
	DiffCalcFunction:         diffBitcoin,
	FeePerByte:               80,
	PowLimit:                 mainPowLimit,
	PowLimitBits:             0x1d00ffff,
	CoinbaseMaturity:         100,
	SubsidyReductionInterval: 210000,
	TargetTimespan:           time.Hour * 24 * 14, // 14 days
	TargetTimePerBlock:       time.Minute * 10,    // 10 minutes
	RetargetAdjustmentFactor: 4,                   // 25% less, 400% more
	ReduceMinDifficulty:      false,
	MinDiffReductionTime:     0,
	GenerateSupported:        false,

	// Checkpoints ordered from oldest to newest.
	Checkpoints: []Checkpoint{
		{11111, newHashFromStr("0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d")},
		{33333, newHashFromStr("000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6")},
		{74000, newHashFromStr("0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20")},
		{105000, newHashFromStr("00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97")},
		{134444, newHashFromStr("00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe")},
		{168000, newHashFromStr("000000000000099e61ea72015e79632f216fe6cb33d7899acb35b75c8303b763")},
		{193000, newHashFromStr("000000000000059f452a5f7340de6682a977387c17010ff6e6c3bd83ca8b1317")},
		{210000, newHashFromStr("000000000000048b95347e83192f69cf0366076336c639f9b7228e9ba171342e")},
		{216116, newHashFromStr("00000000000001b4f4b433e81ee46494af945cf96014816a4e2370f11b23df4e")},
		{225430, newHashFromStr("00000000000001c108384350f74090433e7fcf79a606b8e797f065b130575932")},
		{250000, newHashFromStr("000000000000003887df1f29024b06fc2200b55f8af8f35453d7be294df2d214")},
		{267300, newHashFromStr("000000000000000a83fbd660e918f218bf37edd92b748ad940483c7c116179ac")},
		{279000, newHashFromStr("0000000000000001ae8c72a0b0c301f67e3afca10e819efa9041e458e9bd7e40")},
		{300255, newHashFromStr("0000000000000000162804527c6e9b9f0563a280525f9d08c12041def0a0f3b2")},
		{319400, newHashFromStr("000000000000000021c6052e9becade189495d1c539aa37c58917305fd15f13b")},
		{343185, newHashFromStr("0000000000000000072b8bf361d01a6ba7d445dd024203fafc78768ed4368554")},
		{352940, newHashFromStr("000000000000000010755df42dba556bb72be6a32f3ce0b6941ce4430152c9ff")},
		{382320, newHashFromStr("00000000000000000a8dc6ed5b133d0eb2fd6af56203e4159789b092defd8ab2")},
	},

	// Enforce current block version once majority of the network has
	// upgraded.
	// 75% (750 / 1000)
	// Reject previous block versions once a majority of the network has
	// upgraded.
	// 95% (950 / 1000)
	BlockEnforceNumRequired: 750,
	BlockRejectNumRequired:  950,
	BlockUpgradeNumToCheck:  1000,

	// Mempool parameters
	RelayNonStdTxs: false,

	// Address encoding magics
	PubKeyHashAddrID: 0x00, // starts with 1
	ScriptHashAddrID: 0x05, // starts with 3
	PrivateKeyID:     0x80, // starts with 5 (uncompressed) or K (compressed)
	Bech32Prefix:     "bc", // starts with bc1

	// BIP32 hierarchical deterministic extended key magics
	HDPrivateKeyID: [4]byte{0x04, 0x88, 0xad, 0xe4}, // starts with xprv
	HDPublicKeyID:  [4]byte{0x04, 0x88, 0xb2, 0x1e}, // starts with xpub

	// BIP44 coin type used in the hierarchical deterministic path for
	// address generation.
	HDCoinType: 0,
}

// TestNet3Params defines the network parameters for the test Bitcoin network
// (version 3).  Not to be confused with the regression test network, this
// network is sometimes simply called "testnet".
var TestNet3Params = Params{
	Name:          "testnet3",
	NetMagicBytes: 0x0709110b,
	DefaultPort:   "18333",
	DNSSeeds: []string{
		"testnet-seed.bitcoin.jonasschnelli.ch",
		"seed.tbtc.petertodd.org",
		"seed.testnet.bitcoin.sprovoost.nl",
		"testnet-seed.bluematt.me",
	},

	// Chain parameters
	GenesisBlock: &testNet3GenesisBlock,
	GenesisHash:  &testNet3GenesisHash,
	PoWFunction: func(b []byte, height int32) chainhash.Hash {
		return chainhash.DoubleHashH(b)
	},
	DiffCalcFunction: diffBitcoin,
	StartHeader: newHeaderFromStr("00000020b39e2c241c3fff2c7bf20bc5c5477dc7cedb" +
		"2154ccede1944800000000000000b767d1cb09db9e355835b7e94a385a4f82accea85c" +
		"ac5e6b067096bbd5dcf055fba7415aa313081a91ffefce"),
	StartHeight:              1255968,
	FeePerByte:               80,
	PowLimit:                 testNet3PowLimit,
	PowLimitBits:             0x1d00ffff,
	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{
		{546, newHashFromStr("000000002a936ca763904c3c35fce2f3556c559c0214345d31b1bcebf76acb70")},
	},

	// Enforce current block version once majority of the network has
	// upgraded.
	// 51% (51 / 100)
	// Reject previous block versions once a majority of the network has
	// upgraded.
	// 75% (75 / 100)
	BlockEnforceNumRequired: 51,
	BlockRejectNumRequired:  75,
	BlockUpgradeNumToCheck:  100,

	// Mempool parameters
	RelayNonStdTxs: true,

	// Address encoding magics
	PubKeyHashAddrID: 0x6f, // starts with m or n
	ScriptHashAddrID: 0xc4, // starts with 2
	Bech32Prefix:     "tb",
	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,
	TestCoin:   true,
}

// RegressionNetParams defines the network parameters for the regression test
// Bitcoin network.  Not to be confused with the test Bitcoin network (version
// 3), this network is sometimes simply called "testnet".
var RegressionNetParams = Params{
	Name:          "regtest",
	NetMagicBytes: 0xdab5bffa,
	DefaultPort:   "18444",
	DNSSeeds:      []string{},

	// Chain parameters
	GenesisBlock: &regTestGenesisBlock,
	GenesisHash:  &regTestGenesisHash,
	PoWFunction: func(b []byte, height int32) chainhash.Hash {
		return chainhash.DoubleHashH(b)
	},
	DiffCalcFunction: diffBitcoin,
	//	func(r io.ReadSeeker, height, startheight int32, p *Params) (uint32, error) {
	//		return diffBTC(r, height, startheight, p, false)
	//	},
	FeePerByte:               80,
	PowLimit:                 regressionPowLimit,
	PowLimitBits:             0x207fffff,
	CoinbaseMaturity:         100,
	SubsidyReductionInterval: 150,
	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:        true,

	// Checkpoints ordered from oldest to newest.
	Checkpoints: nil,

	// Enforce current block version once majority of the network has
	// upgraded.
	// 75% (750 / 1000)
	// Reject previous block versions once a majority of the network has
	// upgraded.
	// 95% (950 / 1000)
	BlockEnforceNumRequired: 750,
	BlockRejectNumRequired:  950,
	BlockUpgradeNumToCheck:  1000,

	// Mempool parameters
	RelayNonStdTxs: true,

	// Address encoding magics
	PubKeyHashAddrID: 0x6f, // starts with m or n
	ScriptHashAddrID: 0xc4, // starts with 2
	PrivateKeyID:     0xef, // starts with 9 (uncompressed) or c (compressed)
	Bech32Prefix:     "bcrt",

	// 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: 257,
	TestCoin:   true,
}

// genesisCoinbaseTx is the coinbase transaction for the genesis blocks for
// the main network, regression test network, and test network (version 3).
var genesisCoinbaseTx = wire.MsgTx{
	Version: 1,
	TxIn: []*wire.TxIn{
		{
			PreviousOutPoint: wire.OutPoint{
				Hash:  chainhash.Hash{},
				Index: 0xffffffff,
			},
			SignatureScript: []byte{
				0x04, 0xff, 0xff, 0x00, 0x1d, 0x01, 0x04, 0x45, /* |.......E| */
				0x54, 0x68, 0x65, 0x20, 0x54, 0x69, 0x6d, 0x65, /* |The Time| */
				0x73, 0x20, 0x30, 0x33, 0x2f, 0x4a, 0x61, 0x6e, /* |s 03/Jan| */
				0x2f, 0x32, 0x30, 0x30, 0x39, 0x20, 0x43, 0x68, /* |/2009 Ch| */
				0x61, 0x6e, 0x63, 0x65, 0x6c, 0x6c, 0x6f, 0x72, /* |ancellor| */
				0x20, 0x6f, 0x6e, 0x20, 0x62, 0x72, 0x69, 0x6e, /* | on brin| */
				0x6b, 0x20, 0x6f, 0x66, 0x20, 0x73, 0x65, 0x63, /* |k of sec|*/
				0x6f, 0x6e, 0x64, 0x20, 0x62, 0x61, 0x69, 0x6c, /* |ond bail| */
				0x6f, 0x75, 0x74, 0x20, 0x66, 0x6f, 0x72, 0x20, /* |out for |*/
				0x62, 0x61, 0x6e, 0x6b, 0x73, /* |banks| */
			},
			Sequence: 0xffffffff,
		},
	},
	TxOut: []*wire.TxOut{
		{
			Value: 0x12a05f200,
			PkScript: []byte{
				0x41, 0x04, 0x67, 0x8a, 0xfd, 0xb0, 0xfe, 0x55, /* |A.g....U| */
				0x48, 0x27, 0x19, 0x67, 0xf1, 0xa6, 0x71, 0x30, /* |H'.g..q0| */
				0xb7, 0x10, 0x5c, 0xd6, 0xa8, 0x28, 0xe0, 0x39, /* |..\..(.9| */
				0x09, 0xa6, 0x79, 0x62, 0xe0, 0xea, 0x1f, 0x61, /* |..yb...a| */
				0xde, 0xb6, 0x49, 0xf6, 0xbc, 0x3f, 0x4c, 0xef, /* |..I..?L.| */
				0x38, 0xc4, 0xf3, 0x55, 0x04, 0xe5, 0x1e, 0xc1, /* |8..U....| */
				0x12, 0xde, 0x5c, 0x38, 0x4d, 0xf7, 0xba, 0x0b, /* |..\8M...| */
				0x8d, 0x57, 0x8a, 0x4c, 0x70, 0x2b, 0x6b, 0xf1, /* |.W.Lp+k.| */
				0x1d, 0x5f, 0xac, /* |._.| */
			},
		},
	},
	LockTime: 0,
}

// genesisHash is the hash of the first block in the block chain for the main
// network (genesis block).
var genesisHash = chainhash.Hash([chainhash.HashSize]byte{ // Make go vet happy.
	0x6f, 0xe2, 0x8c, 0x0a, 0xb6, 0xf1, 0xb3, 0x72,
	0xc1, 0xa6, 0xa2, 0x46, 0xae, 0x63, 0xf7, 0x4f,
	0x93, 0x1e, 0x83, 0x65, 0xe1, 0x5a, 0x08, 0x9c,
	0x68, 0xd6, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00,
})

// genesisMerkleRoot is the hash of the first transaction in the genesis block
// for the main network.
var genesisMerkleRoot = chainhash.Hash([chainhash.HashSize]byte{ // Make go vet happy.
	0x3b, 0xa3, 0xed, 0xfd, 0x7a, 0x7b, 0x12, 0xb2,
	0x7a, 0xc7, 0x2c, 0x3e, 0x67, 0x76, 0x8f, 0x61,
	0x7f, 0xc8, 0x1b, 0xc3, 0x88, 0x8a, 0x51, 0x32,
	0x3a, 0x9f, 0xb8, 0xaa, 0x4b, 0x1e, 0x5e, 0x4a,
})

// genesisBlock defines the genesis block of the block chain which serves as the
// public transaction ledger for the main network.
var genesisBlock = wire.MsgBlock{
	Header: wire.BlockHeader{
		Version:    1,
		PrevBlock:  chainhash.Hash{},         // 0000000000000000000000000000000000000000000000000000000000000000
		MerkleRoot: genesisMerkleRoot,        // 4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b
		Timestamp:  time.Unix(0x495fab29, 0), // 2009-01-03 18:15:05 +0000 UTC
		Bits:       0x1d00ffff,               // 486604799 [00000000ffff0000000000000000000000000000000000000000000000000000]
		Nonce:      0x7c2bac1d,               // 2083236893
	},
	Transactions: []*wire.MsgTx{&genesisCoinbaseTx},
}

// regTestGenesisHash is the hash of the first block in the block chain for the
// regression test network (genesis block).
var regTestGenesisHash = chainhash.Hash([chainhash.HashSize]byte{ // Make go vet happy.
	0x06, 0x22, 0x6e, 0x46, 0x11, 0x1a, 0x0b, 0x59,
	0xca, 0xaf, 0x12, 0x60, 0x43, 0xeb, 0x5b, 0xbf,
	0x28, 0xc3, 0x4f, 0x3a, 0x5e, 0x33, 0x2a, 0x1f,
	0xc7, 0xb2, 0xb7, 0x3c, 0xf1, 0x88, 0x91, 0x0f,
})

// regTestGenesisMerkleRoot is the hash of the first transaction in the genesis
// block for the regression test network.  It is the same as the merkle root for
// the main network.
var regTestGenesisMerkleRoot = genesisMerkleRoot

// regTestGenesisBlock defines the genesis block of the block chain which serves
// as the public transaction ledger for the regression test network.
var regTestGenesisBlock = wire.MsgBlock{
	Header: wire.BlockHeader{
		Version:    1,
		PrevBlock:  chainhash.Hash{},         // 0000000000000000000000000000000000000000000000000000000000000000
		MerkleRoot: regTestGenesisMerkleRoot, // 4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b
		Timestamp:  time.Unix(1296688602, 0), // 2011-02-02 23:16:42 +0000 UTC
		Bits:       0x207fffff,               // 545259519 [7fffff0000000000000000000000000000000000000000000000000000000000]
		Nonce:      2,
	},
	Transactions: []*wire.MsgTx{&genesisCoinbaseTx},
}

// testNet3GenesisHash is the hash of the first block in the block chain for the
// test network (version 3).
var testNet3GenesisHash = chainhash.Hash([chainhash.HashSize]byte{ // Make go vet happy.
	0x43, 0x49, 0x7f, 0xd7, 0xf8, 0x26, 0x95, 0x71,
	0x08, 0xf4, 0xa3, 0x0f, 0xd9, 0xce, 0xc3, 0xae,
	0xba, 0x79, 0x97, 0x20, 0x84, 0xe9, 0x0e, 0xad,
	0x01, 0xea, 0x33, 0x09, 0x00, 0x00, 0x00, 0x00,
})

// testNet3GenesisMerkleRoot is the hash of the first transaction in the genesis
// block for the test network (version 3).  It is the same as the merkle root
// for the main network.
var testNet3GenesisMerkleRoot = genesisMerkleRoot

// testNet3GenesisBlock defines the genesis block of the block chain which
// serves as the public transaction ledger for the test network (version 3).
var testNet3GenesisBlock = wire.MsgBlock{
	Header: wire.BlockHeader{
		Version:    1,
		PrevBlock:  chainhash.Hash{},          // 0000000000000000000000000000000000000000000000000000000000000000
		MerkleRoot: testNet3GenesisMerkleRoot, // 4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b
		Timestamp:  time.Unix(1296688602, 0),  // 2011-02-02 23:16:42 +0000 UTC
		Bits:       0x1d00ffff,                // 486604799 [00000000ffff0000000000000000000000000000000000000000000000000000]
		Nonce:      0x18aea41a,                // 414098458
	},
	Transactions: []*wire.MsgTx{&genesisCoinbaseTx},
}