chaincfg

Documentation

Index

• Variables
• func HDPrivateKeyToPublicKeyID(id []byte) ([]byte, error)
• func IsPubKeyHashAddrID(id byte) bool
• func IsScriptHashAddrID(id byte) bool
• func Register(params *Params) error
• type Checkpoint
• type Params

Variables

var (
	// ErrDuplicateNet describes an error where the parameters for a Bitcoin
	// network could not be set due to the network already being a standard
	// network or previously-registered into this package.
	ErrDuplicateNet = errors.New("duplicate Bitcoin network")

	// ErrUnknownHDKeyID describes an error where the provided id which
	// is intended to identify the network for a hierarchical deterministic
	// private extended key is not registered.
	ErrUnknownHDKeyID = errors.New("unknown hd private extended key bytes")
)

var MainNetParams = Params{

	Net:         wire.MainNet,
	DefaultPort: "8108",

	PowLimit:               mainPowLimit,
	PowLimitBits:           0x1d00ffff,
	SubsidyHalvingInterval: 210000,
	ResetMinDifficulty:     false,

	BlockV1RejectNumRequired: 950,
	BlockV1RejectNumToCheck:  1000,

	CoinbaseBlockHeightNumRequired: 750,
	CoinbaseBlockHeightNumToCheck:  1000,

	RelayNonStdTxs: false,

	PubKeyHashAddrID: 0x00,
	ScriptHashAddrID: 0x05,
	PrivateKeyID:     0x80,

	HDPrivateKeyID: [4]byte{0x04, 0x88, 0xad, 0xe4},
	HDPublicKeyID:  [4]byte{0x04, 0x88, 0xb2, 0x1e},

	HDCoinType: 0,
}

MainNetParams defines the network parameters for the main Bitcoin network.

var RegressionNetParams = Params{
	Name: "devnet",
	Net:  wire.TestNet,

	DefaultPort: "12204",

	PowLimit:               regressionPowLimit,
	PowLimitBits:           0x207fffff,
	SubsidyHalvingInterval: 150,
	ResetMinDifficulty:     true,

	BlockV1RejectNumRequired: 75,
	BlockV1RejectNumToCheck:  100,

	CoinbaseBlockHeightNumRequired: 51,
	CoinbaseBlockHeightNumToCheck:  100,

	RelayNonStdTxs: true,

	PubKeyHashAddrID: 0x6f,
	ScriptHashAddrID: 0xc4,
	PrivateKeyID:     0xef,

	HDPrivateKeyID: [4]byte{0x04, 0x35, 0x83, 0x94},
	HDPublicKeyID:  [4]byte{0x04, 0x35, 0x87, 0xcf},

	HDCoinType: 1,
}

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 SimNetParams = Params{
	Name:        "simnet",
	Net:         wire.SimNet,
	DefaultPort: "18555",

	PowLimit:               simNetPowLimit,
	PowLimitBits:           0x207fffff,
	SubsidyHalvingInterval: 210000,
	ResetMinDifficulty:     true,

	BlockV1RejectNumRequired: 75,
	BlockV1RejectNumToCheck:  100,

	CoinbaseBlockHeightNumRequired: 51,
	CoinbaseBlockHeightNumToCheck:  100,

	RelayNonStdTxs: true,

	PubKeyHashAddrID: 0x3f,
	ScriptHashAddrID: 0x7b,
	PrivateKeyID:     0x64,

	HDPrivateKeyID: [4]byte{0x04, 0x20, 0xb9, 0x00},
	HDPublicKeyID:  [4]byte{0x04, 0x20, 0xbd, 0x3a},

	HDCoinType: 115,
}

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 testing. The functionality is intended to differ in that the only nodes which are specifically specified are used to create the network rather than following normal discovery rules. This is important as otherwise it would just turn into another public testnet.

var TestNet3Params = Params{
	Name:        "testnet3",
	Net:         wire.TestNet3,
	DefaultPort: "18108",

	PowLimit:               testNet3PowLimit,
	PowLimitBits:           0x1d00ffff,
	SubsidyHalvingInterval: 210000,
	ResetMinDifficulty:     true,

	BlockV1RejectNumRequired: 75,
	BlockV1RejectNumToCheck:  100,

	CoinbaseBlockHeightNumRequired: 51,
	CoinbaseBlockHeightNumToCheck:  100,

	RelayNonStdTxs: true,

	PubKeyHashAddrID: 0x6f,
	ScriptHashAddrID: 0xc4,
	PrivateKeyID:     0xef,

	HDPrivateKeyID: [4]byte{0x04, 0x35, 0x83, 0x94},
	HDPublicKeyID:  [4]byte{0x04, 0x35, 0x87, 0xcf},

	HDCoinType: 1,
}

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".

Functions

func HDPrivateKeyToPublicKeyID

func HDPrivateKeyToPublicKeyID(id []byte) ([]byte, error)

HDPrivateKeyToPublicKeyID accepts a private hierarchical deterministic extended key id and returns the associated public key id. When the provided id is not registered, the ErrUnknownHDKeyID error will be returned.

func IsPubKeyHashAddrID

func IsPubKeyHashAddrID(id byte) bool

IsPubKeyHashAddrID returns whether the id is an identifier known to prefix a pay-to-pubkey-hash address on any default or registered network. This is used when decoding an address string into a specific address type. It is up to the caller to check both this and IsScriptHashAddrID and decide whether an address is a pubkey hash address, script hash address, neither, or undeterminable (if both return true).

func IsScriptHashAddrID

func IsScriptHashAddrID(id byte) bool

IsScriptHashAddrID returns whether the id is an identifier known to prefix a pay-to-script-hash address on any default or registered network. This is used when decoding an address string into a specific address type. It is up to the caller to check both this and IsPubKeyHashAddrID and decide whether an address is a pubkey hash address, script hash address, neither, or undeterminable (if both return true).

func Register

func Register(params *Params) error

Register registers the network parameters for a Bitcoin network. This may error with ErrDuplicateNet if the network is already registered (either due to a previous Register call, or the network being one of the default networks).

Network parameters should be registered into this package by a main package as early as possible. Then, library packages may lookup networks or network parameters based on inputs and work regardless of the network being standard or not.

Types

type Checkpoint

type Checkpoint struct {
	Height int64
	Hash   *wire.ShaHash
}

Checkpoint identifies a known good point in the block chain. Using checkpoints allows a few optimizations for old blocks during initial download and also prevents forks from old blocks.

Each checkpoint is selected based upon several factors. See the documentation for blockchain.IsCheckpointCandidate for details on the selection criteria.

type Params

type Params struct {
	Name        string
	Net         wire.BitcoinNet
	DefaultPort string

	// Chain parameters
	//	GenesisBlock           *wire.MsgBlock
	//	GenesisHash            *wire.ShaHash
	PowLimit               *big.Int
	PowLimitBits           uint32
	SubsidyHalvingInterval int32
	ResetMinDifficulty     bool

	// Checkpoints ordered from oldest to newest.
	Checkpoints []Checkpoint

	// Reject version 1 blocks once a majority of the network has upgraded.
	// This is part of BIP0034.
	BlockV1RejectNumRequired uint64
	BlockV1RejectNumToCheck  uint64

	// Ensure coinbase starts with serialized block heights for version 2
	// blocks or newer once a majority of the network has upgraded.
	CoinbaseBlockHeightNumRequired uint64
	CoinbaseBlockHeightNumToCheck  uint64

	// Mempool parameters
	RelayNonStdTxs bool

	// Address encoding magics
	PubKeyHashAddrID byte // First byte of a P2PKH address
	ScriptHashAddrID byte // First byte of a P2SH address
	PrivateKeyID     byte // First byte of a WIF private key

	// BIP32 hierarchical deterministic extended key magics
	HDPrivateKeyID [4]byte
	HDPublicKeyID  [4]byte

	// BIP44 coin type used in the hierarchical deterministic path for
	// address generation.
	HDCoinType uint32
}

Params defines a Bitcoin network by its parameters. These parameters may be used by Bitcoin applications to differentiate networks as well as addresses and keys for one network from those intended for use on another network.