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params.go
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/
params.go
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// Copyright (c) 2016 The btcsuite developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package fullblocktests
import (
"encoding/hex"
"math/big"
"time"
"github.com/btcsuite/btcd/chaincfg"
"github.com/btcsuite/btcd/chaincfg/chainhash"
"github.com/btcsuite/btcd/wire"
)
// newHashFromStr converts the passed big-endian hex string into a
// wire.Hash. It only differs from the one available in chainhash in that
// it panics on an error since it will only (and must only) be called with
// hard-coded, and therefore known good, hashes.
func newHashFromStr(hexStr string) *chainhash.Hash {
hash, err := chainhash.NewHashFromStr(hexStr)
if err != nil {
panic(err)
}
return hash
}
// fromHex converts the passed hex string into a byte slice and will panic if
// there is an error. This is only provided for the hard-coded constants so
// errors in the source code can be detected. It will only (and must only) be
// called for initialization purposes.
func fromHex(s string) []byte {
r, err := hex.DecodeString(s)
if err != nil {
panic("invalid hex in source file: " + s)
}
return r
}
var (
// bigOne is 1 represented as a big.Int. It is defined here to avoid
// the overhead of creating it multiple times.
bigOne = big.NewInt(1)
// regressionPowLimit is the highest proof of work value a Bitcoin block
// can have for the regression test network. It is the value 2^255 - 1.
regressionPowLimit = new(big.Int).Sub(new(big.Int).Lsh(bigOne, 255), bigOne)
// regTestGenesisBlock defines the genesis block of the block chain which serves
// as the public transaction ledger for the regression test network.
regTestGenesisBlock = wire.MsgBlock{
Header: wire.BlockHeader{
Version: 1,
PrevBlock: *newHashFromStr("0000000000000000000000000000000000000000000000000000000000000000"),
MerkleRoot: *newHashFromStr("4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"),
Timestamp: time.Unix(1296688602, 0), // 2011-02-02 23:16:42 +0000 UTC
Bits: 0x207fffff, // 545259519 [7fffff0000000000000000000000000000000000000000000000000000000000]
Nonce: 2,
},
Transactions: []*wire.MsgTx{{
Version: 1,
TxIn: []*wire.TxIn{{
PreviousOutPoint: wire.OutPoint{
Hash: chainhash.Hash{},
Index: 0xffffffff,
},
SignatureScript: fromHex("04ffff001d010445" +
"5468652054696d65732030332f4a616e2f" +
"32303039204368616e63656c6c6f72206f" +
"6e206272696e6b206f66207365636f6e64" +
"206261696c6f757420666f72206261686b73"),
Sequence: 0xffffffff,
}},
TxOut: []*wire.TxOut{{
Value: 0,
PkScript: fromHex("4104678afdb0fe5548271967f1" +
"a67130b7105cd6a828e03909a67962e0ea1f" +
"61deb649f6bc3f4cef38c4f35504e51ec138" +
"c4f35504e51ec112de5c384df7ba0b8d578a" +
"4c702b6bf11d5fac"),
}},
LockTime: 0,
}},
}
)
// regressionNetParams defines the network parameters for the regression test
// network.
//
// NOTE: The test generator intentionally does not use the existing definitions
// in the chaincfg package since the intent is to be able to generate known
// good tests which exercise that code. Using the chaincfg parameters would
// allow them to change out from under the tests potentially invalidating them.
var regressionNetParams = &chaincfg.Params{
Name: "regtest",
Net: wire.TestNet,
DefaultPort: "18444",
// Chain parameters
GenesisBlock: ®TestGenesisBlock,
GenesisHash: newHashFromStr("5bec7567af40504e0994db3b573c186fffcc4edefe096ff2e58d00523bd7e8a6"),
PowLimit: regressionPowLimit,
PowLimitBits: 0x207fffff,
CoinbaseMaturity: 100,
BIP0034Height: 100000000, // Not active - Permit ver 1 blocks
BIP0065Height: 1351, // Used by regression tests
BIP0066Height: 1251, // Used by regression tests
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,
// 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)
// 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,
}