common

package
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Published: Oct 21, 2020 License: AGPL-3.0 Imports: 14 Imported by: 0

Documentation

Overview

Package common contains various helper functions.

Index

Constants

View Source
const (
	HashLength       = 32
	AddressLength    = 42
	PubkeyHashLength = 20
)

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")

	// ErrUnsupportedWitnessVer describes an error where a segwit address being
	// decoded has an unsupported witness version.
	ErrUnsupportedWitnessVer = errors.New("unsupported witness version")

	// ErrUnsupportedWitnessProgLen describes an error where a segwit address
	// being decoded has an unsupported witness program length.
	ErrUnsupportedWitnessProgLen = errors.New("unsupported witness program length")
)

Functions

func Bytes2Hex

func Bytes2Hex(d []byte) string

Bytes2Hex convert byte array to string

func BytesToUnit64

func BytesToUnit64(b []byte) uint64

BytesToUnit64 convert bytes to uint64

func EmptyHash

func EmptyHash(h Hash) bool

func FromHex

func FromHex(s string) []byte

FromHex convert hex byte string to []byte

func Hex2Bytes

func Hex2Bytes(str string) []byte

Hex2Bytes convert hex string to byte array

func IsBech32SegwitPrefix added in v0.3.0

func IsBech32SegwitPrefix(prefix string, params *consensus.Params) bool

IsBech32SegwitPrefix returns whether the prefix is a known prefix for segwit addresses on any default or registered network. This is used when decoding an address string into a specific address type.

func IsOpenFederationIssueAsset added in v1.0.5

func IsOpenFederationIssueAsset(rawDefinitionByte []byte) bool

IsOpenFederationIssueAsset check if the asset definition satisfy ofmf asset

func Unit64ToBytes

func Unit64ToBytes(n uint64) []byte

Unit64ToBytes convert uint64 to bytes

Types

type Address

type Address interface {
	// String returns the string encoding of the transaction output
	// destination.
	//
	// Please note that String differs subtly from EncodeAddress: String
	// will return the value as a string without any conversion, while
	// EncodeAddress may convert destination types (for example,
	// converting pubkeys to P2PKH addresses) before encoding as a
	// payment address string.
	String() string

	// EncodeAddress returns the string encoding of the payment address
	// associated with the Address value.  See the comment on String
	// for how this method differs from String.
	EncodeAddress() string

	// ScriptAddress returns the raw bytes of the address to be used
	// when inserting the address into a txout's script.
	ScriptAddress() []byte

	// IsForNet returns whether or not the address is associated with the
	// passed bytom network.
	IsForNet(*consensus.Params) bool
}

Address is an interface type for any type of destination a transaction output may spend to. This includes pay-to-pubkey (P2PK), pay-to-pubkey-hash (P2PKH), and pay-to-script-hash (P2SH). Address is designed to be generic enough that other kinds of addresses may be added in the future without changing the decoding and encoding API.

func DecodeAddress

func DecodeAddress(addr string, param *consensus.Params) (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 bytom 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.

type AddressWitnessPubKeyHash

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

AddressWitnessPubKeyHash is an Address for a pay-to-witness-pubkey-hash (P2WPKH) output. See BIP 173 for further details regarding native segregated witness address encoding: https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki

func NewAddressWitnessPubKeyHash

func NewAddressWitnessPubKeyHash(witnessProg []byte, param *consensus.Params) (*AddressWitnessPubKeyHash, error)

NewAddressWitnessPubKeyHash returns a new AddressWitnessPubKeyHash.

func (*AddressWitnessPubKeyHash) EncodeAddress

func (a *AddressWitnessPubKeyHash) EncodeAddress() string

EncodeAddress returns the bech32 string encoding of an AddressWitnessPubKeyHash. Part of the Address interface.

func (*AddressWitnessPubKeyHash) Hash160

func (a *AddressWitnessPubKeyHash) Hash160() *[20]byte

Hash160 returns the witness program of the AddressWitnessPubKeyHash as a byte array.

func (*AddressWitnessPubKeyHash) Hrp

Hrp returns the human-readable part of the bech32 encoded AddressWitnessPubKeyHash.

func (*AddressWitnessPubKeyHash) IsForNet

func (a *AddressWitnessPubKeyHash) IsForNet(param *consensus.Params) bool

IsForNet returns whether or not the AddressWitnessPubKeyHash is associated with the passed bitcoin network. Part of the Address interface.

func (*AddressWitnessPubKeyHash) ScriptAddress

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

ScriptAddress returns the witness program for this address. Part of the Address interface.

func (*AddressWitnessPubKeyHash) String

func (a *AddressWitnessPubKeyHash) String() string

String returns a human-readable string for the AddressWitnessPubKeyHash. This is equivalent to calling EncodeAddress, but is provided so the type can be used as a fmt.Stringer. Part of the Address interface.

func (*AddressWitnessPubKeyHash) WitnessProgram

func (a *AddressWitnessPubKeyHash) WitnessProgram() []byte

WitnessProgram returns the witness program of the AddressWitnessPubKeyHash.

func (*AddressWitnessPubKeyHash) WitnessVersion

func (a *AddressWitnessPubKeyHash) WitnessVersion() byte

WitnessVersion returns the witness version of the AddressWitnessPubKeyHash.

type AddressWitnessScriptHash

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

AddressWitnessScriptHash is an Address for a pay-to-witness-script-hash (P2WSH) output. See BIP 173 for further details regarding native segregated witness address encoding: https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki

func NewAddressWitnessScriptHash

func NewAddressWitnessScriptHash(witnessProg []byte, param *consensus.Params) (*AddressWitnessScriptHash, error)

NewAddressWitnessScriptHash returns a new AddressWitnessPubKeyHash.

func (*AddressWitnessScriptHash) EncodeAddress

func (a *AddressWitnessScriptHash) EncodeAddress() string

EncodeAddress returns the bech32 string encoding of an AddressWitnessScriptHash. Part of the Address interface.

func (*AddressWitnessScriptHash) Hrp

Hrp returns the human-readable part of the bech32 encoded AddressWitnessScriptHash.

func (*AddressWitnessScriptHash) IsForNet

func (a *AddressWitnessScriptHash) IsForNet(param *consensus.Params) bool

IsForNet returns whether or not the AddressWitnessScriptHash is associated with the passed bytom network. Part of the Address interface.

func (*AddressWitnessScriptHash) ScriptAddress

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

ScriptAddress returns the witness program for this address. Part of the Address interface.

func (*AddressWitnessScriptHash) Sha256

func (a *AddressWitnessScriptHash) Sha256() *[32]byte

Sha256 returns the witness program of the AddressWitnessPubKeyHash as a byte array.

func (*AddressWitnessScriptHash) String

func (a *AddressWitnessScriptHash) String() string

String returns a human-readable string for the AddressWitnessScriptHash. This is equivalent to calling EncodeAddress, but is provided so the type can be used as a fmt.Stringer. Part of the Address interface.

func (*AddressWitnessScriptHash) WitnessProgram

func (a *AddressWitnessScriptHash) WitnessProgram() []byte

WitnessProgram returns the witness program of the AddressWitnessScriptHash.

func (*AddressWitnessScriptHash) WitnessVersion

func (a *AddressWitnessScriptHash) WitnessVersion() byte

WitnessVersion returns the witness version of the AddressWitnessScriptHash.

type Cache

type Cache struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

Cache is an LRU cache. It is safe for concurrent access.

func NewCache

func NewCache(maxEntries int) *Cache

NewCache creates a new Cache. If maxEntries is zero, the cache has no limit and it's assumed that eviction is done by the caller.

func (*Cache) Add

func (c *Cache) Add(key, value interface{})

Add adds a value to the cache.

func (*Cache) Clear

func (c *Cache) Clear()

Clear purges all stored items from the cache.

func (*Cache) Get

func (c *Cache) Get(key interface{}) (value interface{}, ok bool)

Get looks up a key's value from the cache.

func (*Cache) Len

func (c *Cache) Len() int

Len returns the number of items in the cache.

func (*Cache) Remove

func (c *Cache) Remove(key interface{})

Remove removes the provided key from the cache.

func (*Cache) RemoveOldest

func (c *Cache) RemoveOldest()

RemoveOldest removes the oldest item from the cache.

type Hash

type Hash [HashLength]byte

func BigToHash

func BigToHash(b *big.Int) Hash

func BytesToHash

func BytesToHash(b []byte) Hash

func StringToHash

func StringToHash(s string) Hash

func (Hash) Bytes

func (h Hash) Bytes() []byte

func (Hash) Generate

func (h Hash) Generate(rand *rand.Rand, size int) reflect.Value

Generate implements testing/quick.Generator.

func (Hash) Hex

func (h Hash) Hex() string

func (Hash) MarshalJSON

func (h Hash) MarshalJSON() ([]byte, error)

Serialize given hash to JSON

func (*Hash) Set

func (h *Hash) Set(other Hash)

Sets h to other

func (*Hash) SetBytes

func (h *Hash) SetBytes(b []byte)

Sets the hash to the value of b. If b is larger than len(h) it will panic

func (Hash) Str

func (h Hash) Str() string

Get the string representation of the underlying hash

func (*Hash) UnmarshalJSON

func (h *Hash) UnmarshalJSON(input []byte) error

UnmarshalJSON parses a hash in its hex from to a hash.

type OrderedSet added in v0.3.0

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

OrderedSet is a set with limited capacity. Items are evicted according to their insertion order.

func NewOrderedSet added in v0.3.0

func NewOrderedSet(capacity int) (*OrderedSet, error)

NewOrderedSet creates an ordered set with given capacity

func (*OrderedSet) Add added in v0.3.0

func (os *OrderedSet) Add(items ...interface{})

Add inserts items into the set. If capacity is reached, oldest items are evicted

func (*OrderedSet) Has added in v0.3.0

func (os *OrderedSet) Has(item interface{}) bool

Has checks if certain items exists in the set

func (*OrderedSet) Size added in v0.3.0

func (os *OrderedSet) Size() int

Size returns the size of the set

Directories

Path Synopsis
Package bech32 provides a Go implementation of the bech32 format specified in BIP 173.
Package bech32 provides a Go implementation of the bech32 format specified in BIP 173.

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