bchutil

package module
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 Go to latest Published: Jan 4, 2019 License: MIT Imports: 12 Imported by: 26

README

bchutil

Bitcoin Cash Utilities

Contains the bitcoin cash signing algorithm and some protocol configuration. This package removes the need to use a fork of btcd when working with Bitcoin Cash.

Documentation

Index

Constants

View Source 
const (
	// MainNet represents the main bitcoin network.
	MainnetMagic wire.BitcoinNet = 0xe8f3e1e3

	// Testnet represents the test network (version 3).
	TestnetMagic wire.BitcoinNet = 0xf4f3e5f4

	// Regtest represents the regression test network.
	Regtestmagic wire.BitcoinNet = 0xfabfb5da
)
View Source 
const CHARSET string = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"

*

  • The cashaddr character set for encoding.
View Source 
const SFNodeBitcoinCash wire.ServiceFlag = 1 << 5

Node_BitcoinCash service bit

View Source 
const (
	SigHashForkID txscript.SigHashType = 0x40
)

Variables

View Source 
var (
	// ErrChecksumMismatch describes an error where decoding failed due
	// to a bad checksum.
	ErrChecksumMismatch = errors.New("checksum mismatch")

	// ErrUnknownAddressType describes an error where an address can not
	// decoded as a specific address type due to the string encoding
	// begining with an identifier byte unknown to any standard or
	// registered (via chaincfg.Register) network.
	ErrUnknownAddressType = errors.New("unknown address type")

	// ErrAddressCollision describes an error where an address can not
	// be uniquely determined as either a pay-to-pubkey-hash or
	// pay-to-script-hash address since the leading identifier is used for
	// describing both address kinds, but for different networks.  Rather
	// than assuming or defaulting to one or the other, this error is
	// returned and the caller must decide how to decode the address.
	ErrAddressCollision = errors.New("address collision")

	// ErrInvalidFormat describes an error where decoding failed due to invalid version
	ErrInvalidFormat = errors.New("invalid format: version and/or checksum bytes missing")

	Prefixes map[string]string
)
View Source 
var CHARSET_REV = [128]int8{}/* 128 elements not displayed */

*

  • The cashaddr character set for decoding.
View Source 
var MainnetDNSSeeds = []chaincfg.DNSSeed{
	{"seed.bitcoinabc.org", true},
	{"seed-abc.bitcoinforks.org", true},
	{"seed.bitcoinunlimited.info", true},
	{"seed.bitprim.org", true},
	{"seed.deadalnix.me", true},
}
View Source 
var TestnetDNSSeeds = []chaincfg.DNSSeed{
	{"testnet-seed.bitcoinabc.org", true},
	{"testnet-seed-abc.bitcoinforks.org", true},
	{"testnet-seed.bitcoinunlimited.info", true},
	{"testnet-seed.bitprim.org", true},
	{"testnet-seed.deadalnix.me", true},
}

Functions

func Cat 

func Cat(x, y data) data

*

  • Concatenate two byte arrays.

func CheckEncodeCashAddress 

func CheckEncodeCashAddress(input []byte, prefix string, t AddressType) string

func CreateChecksum 

func CreateChecksum(prefix string, payload data) data

*

  • Create a checksum.

func DecodeAddress 

func DecodeAddress(addr string, defaultNet *chaincfg.Params) (btcutil.Address, error)

DecodeAddress decodes the string encoding of an address and returns the Address if addr is a valid encoding for a known address type.

The bitcoin cash network the address is associated with is extracted if possible.

func DecodeBitpay 

func DecodeBitpay(addr string, defaultNet *chaincfg.Params) (btcutil.Address, error)

DecodeAddress decodes the string encoding of an address and returns the Address if addr is a valid encoding for a known address type.

The bitcoin network the address is associated with is extracted if possible. When the address does not encode the network, such as in the case of a raw public key, the address will be associated with the passed defaultNet.

func DecodeCashAddress 

func DecodeCashAddress(str string) (string, data, error)

*

  • Decode a cashaddr string.

func Encode 

func Encode(prefix string, payload data) string

*

  • Encode a cashaddr string.

func ExpandPrefix 

func ExpandPrefix(prefix string) data

*

  • Expand the address prefix for the checksum computation.

func ExtractPkScriptAddrs 

func ExtractPkScriptAddrs(pkScript []byte, chainParams *chaincfg.Params) (btcutil.Address, error)

ExtractPkScriptAddrs returns the type of script, addresses and required signatures associated with the passed PkScript. Note that it only works for 'standard' transaction script types. Any data such as public keys which are invalid are omitted from the results.

func GetDNSSeed 

func GetDNSSeed(params *chaincfg.Params) []chaincfg.DNSSeed

func LowerCase 

func LowerCase(c byte) byte

*

  • Convert to lower case. *
  • Assume the input is a character.

func PayToAddrScript 

func PayToAddrScript(addr btcutil.Address) ([]byte, error)

func PolyMod 

func PolyMod(v data) uint64

*

  • This function will compute what 8 5-bit values to XOR into the last 8 input
  • values, in order to make the checksum 0. These 8 values are packed together
  • in a single 40-bit integer. The higher bits correspond to earlier values.

func RawTxInSignature 

func RawTxInSignature(tx *wire.MsgTx, idx int, subScript []byte,
	hashType txscript.SigHashType, key *btcec.PrivateKey, amt int64) ([]byte, error)

RawTxInSignature returns the serialized ECDSA signature for the input idx of the given transaction, with hashType appended to it.

func SignTxOutput 

func SignTxOutput(chainParams *chaincfg.Params, tx *wire.MsgTx, idx int,
	pkScript []byte, hashType txscript.SigHashType, kdb txscript.KeyDB, sdb txscript.ScriptDB,
	previousScript []byte, amt int64) ([]byte, error)

func SignatureScript 

func SignatureScript(tx *wire.MsgTx, idx int, subscript []byte, hashType txscript.SigHashType, privKey *btcec.PrivateKey, compress bool, amt int64) ([]byte, error)

func VerifyChecksum 

func VerifyChecksum(prefix string, payload data) bool

*

  • Verify a checksum.

Types

type AddressType 

type AddressType int
const (
	P2PKH AddressType = 0
	P2SH  AddressType = 1
)

func CheckDecodeCashAddress 

func CheckDecodeCashAddress(input string) (result []byte, prefix string, t AddressType, err error)

CheckDecode decodes a string that was encoded with CheckEncode and verifies the checksum.

type BitpayAddressPubKeyHash 

type BitpayAddressPubKeyHash struct {
	// contains filtered or unexported fields
}

AddressPubKeyHash is an Address for a pay-to-pubkey-hash (P2PKH) transaction.

func NewBitpayAddressPubKeyHash 

func NewBitpayAddressPubKeyHash(pkHash []byte, net *chaincfg.Params) (*BitpayAddressPubKeyHash, error)

NewAddressPubKeyHash returns a new AddressPubKeyHash. pkHash mustbe 20 bytes.

func (*BitpayAddressPubKeyHash) EncodeAddress 

func (a *BitpayAddressPubKeyHash) EncodeAddress() string

EncodeAddress returns the string encoding of a pay-to-pubkey-hash address. Part of the Address interface.

func (*BitpayAddressPubKeyHash) Hash160 

func (a *BitpayAddressPubKeyHash) Hash160() *[ripemd160.Size]byte

Hash160 returns the underlying array of the pubkey hash. This can be useful when an array is more appropiate than a slice (for example, when used as map keys).

func (*BitpayAddressPubKeyHash) IsForNet 

func (a *BitpayAddressPubKeyHash) IsForNet(net *chaincfg.Params) bool

IsForNet returns whether or not the pay-to-pubkey-hash address is associated with the passed bitcoin network.

func (*BitpayAddressPubKeyHash) ScriptAddress 

func (a *BitpayAddressPubKeyHash) ScriptAddress() []byte

ScriptAddress returns the bytes to be included in a txout script to pay to a pubkey hash. Part of the Address interface.

func (*BitpayAddressPubKeyHash) String 

func (a *BitpayAddressPubKeyHash) String() string

String returns a human-readable string for the pay-to-pubkey-hash address. This is equivalent to calling EncodeAddress, but is provided so the type can be used as a fmt.Stringer.

type BitpayAddressScriptHash 

type BitpayAddressScriptHash struct {
	// contains filtered or unexported fields
}

AddressScriptHash is an Address for a pay-to-script-hash (P2SH) transaction.

func NewBitpayAddressScriptHash 

func NewBitpayAddressScriptHash(serializedScript []byte, net *chaincfg.Params) (*BitpayAddressScriptHash, error)

NewAddressScriptHash returns a new AddressScriptHash.

func NewBitpayAddressScriptHashFromHash 

func NewBitpayAddressScriptHashFromHash(scriptHash []byte, net *chaincfg.Params) (*BitpayAddressScriptHash, error)

NewAddressScriptHashFromHash returns a new AddressScriptHash. scriptHash must be 20 bytes.

func (*BitpayAddressScriptHash) EncodeAddress 

func (a *BitpayAddressScriptHash) EncodeAddress() string

EncodeAddress returns the string encoding of a pay-to-script-hash address. Part of the Address interface.

func (*BitpayAddressScriptHash) Hash160 

func (a *BitpayAddressScriptHash) Hash160() *[ripemd160.Size]byte

Hash160 returns the underlying array of the script hash. This can be useful when an array is more appropiate than a slice (for example, when used as map keys).

func (*BitpayAddressScriptHash) IsForNet 

func (a *BitpayAddressScriptHash) IsForNet(net *chaincfg.Params) bool

IsForNet returns whether or not the pay-to-script-hash address is associated with the passed bitcoin network.

func (*BitpayAddressScriptHash) ScriptAddress 

func (a *BitpayAddressScriptHash) ScriptAddress() []byte

ScriptAddress returns the bytes to be included in a txout script to pay to a script hash. Part of the Address interface.

func (*BitpayAddressScriptHash) String 

func (a *BitpayAddressScriptHash) String() string

String returns a human-readable string for the pay-to-script-hash address. This is equivalent to calling EncodeAddress, but is provided so the type can be used as a fmt.Stringer.

type CashAddressPubKeyHash 

type CashAddressPubKeyHash struct {
	// contains filtered or unexported fields
}

AddressPubKeyHash is an Address for a pay-to-pubkey-hash (P2PKH) transaction.

func NewCashAddressPubKeyHash 

func NewCashAddressPubKeyHash(pkHash []byte, net *chaincfg.Params) (*CashAddressPubKeyHash, error)

NewAddressPubKeyHash returns a new AddressPubKeyHash. pkHash mustbe 20 bytes.

func (*CashAddressPubKeyHash) EncodeAddress 

func (a *CashAddressPubKeyHash) EncodeAddress() string

EncodeAddress returns the string encoding of a pay-to-pubkey-hash address. Part of the Address interface.

func (*CashAddressPubKeyHash) Hash160 

func (a *CashAddressPubKeyHash) Hash160() *[ripemd160.Size]byte

Hash160 returns the underlying array of the pubkey hash. This can be useful when an array is more appropiate than a slice (for example, when used as map keys).

func (*CashAddressPubKeyHash) IsForNet 

func (a *CashAddressPubKeyHash) IsForNet(net *chaincfg.Params) bool

IsForNet returns whether or not the pay-to-pubkey-hash address is associated with the passed bitcoin cash network.

func (*CashAddressPubKeyHash) ScriptAddress 

func (a *CashAddressPubKeyHash) ScriptAddress() []byte

ScriptAddress returns the bytes to be included in a txout script to pay to a pubkey hash. Part of the Address interface.

func (*CashAddressPubKeyHash) String 

func (a *CashAddressPubKeyHash) String() string

String returns a human-readable string for the pay-to-pubkey-hash address. This is equivalent to calling EncodeAddress, but is provided so the type can be used as a fmt.Stringer.

type CashAddressScriptHash 

type CashAddressScriptHash struct {
	// contains filtered or unexported fields
}

AddressScriptHash is an Address for a pay-to-script-hash (P2SH) transaction.

func NewCashAddressScriptHash 

func NewCashAddressScriptHash(serializedScript []byte, net *chaincfg.Params) (*CashAddressScriptHash, error)

NewAddressScriptHash returns a new AddressScriptHash.

func NewCashAddressScriptHashFromHash 

func NewCashAddressScriptHashFromHash(scriptHash []byte, net *chaincfg.Params) (*CashAddressScriptHash, error)

NewAddressScriptHashFromHash returns a new AddressScriptHash. scriptHash must be 20 bytes.

func (*CashAddressScriptHash) EncodeAddress 

func (a *CashAddressScriptHash) EncodeAddress() string

EncodeAddress returns the string encoding of a pay-to-script-hash address. Part of the Address interface.

func (*CashAddressScriptHash) Hash160 

func (a *CashAddressScriptHash) Hash160() *[ripemd160.Size]byte

Hash160 returns the underlying array of the script hash. This can be useful when an array is more appropiate than a slice (for example, when used as map keys).

func (*CashAddressScriptHash) IsForNet 

func (a *CashAddressScriptHash) IsForNet(net *chaincfg.Params) bool

IsForNet returns whether or not the pay-to-script-hash address is associated with the passed bitcoin cash network.

func (*CashAddressScriptHash) ScriptAddress 

func (a *CashAddressScriptHash) ScriptAddress() []byte

ScriptAddress returns the bytes to be included in a txout script to pay to a script hash. Part of the Address interface.

func (*CashAddressScriptHash) String 

func (a *CashAddressScriptHash) String() string

String returns a human-readable string for the pay-to-script-hash address. This is equivalent to calling EncodeAddress, but is provided so the type can be used as a fmt.Stringer.

type UnsupportedWitnessProgLenError 

type UnsupportedWitnessProgLenError int

UnsupportedWitnessProgLenError describes an error where a segwit address being decoded has an unsupported witness program length.

func (UnsupportedWitnessProgLenError) Error 

func (e UnsupportedWitnessProgLenError) Error() string

type UnsupportedWitnessVerError 

type UnsupportedWitnessVerError byte

UnsupportedWitnessVerError describes an error where a segwit address being decoded has an unsupported witness version.

func (UnsupportedWitnessVerError) Error 

func (e UnsupportedWitnessVerError) Error() string

Source Files

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