tx

Documentation

Index

• type Input
• type OutPoint
• type Output
  • func NewOutput(value int, address string) Output
  • func (o Output) IsLockedWithKey(pubKeyHash []byte) bool
• type Tx
  • func New(inputs []Input, outputs []Output, fee int) (*Tx, error)
  • func NewCoinbase(toAddr, data string, fees int, nextBlockHeight int32) (*Tx, error)
  • func (tx *Tx) IsCoinbase() bool
  • func (tx *Tx) Sign(privKey *ecdsa.PrivateKey, prevTxs map[string]Tx) error
  • func (tx Tx) String() string
  • func (tx *Tx) TrimmedCopy() Tx
  • func (tx *Tx) Verify(prevTxs map[string]Tx) (bool, error)

Types

type Input

type Input struct {
	Signature  []byte
	PubKey     []byte
	PrevOutput OutPoint
}

Input represents a transaction input, each input references the output of another transaction.

type OutPoint

type OutPoint struct {
	// Transaction ID of the previous output
	TxID []byte
	// Index of the referenced output in the previous transaction
	Index int
}

OutPoint represents the previous output being spent.

type Output

type Output struct {
	// Hashed public key of the coins' owner
	PubKeyHash []byte
	// Represented in satoshis
	Value int
}

Output represents a transaction output, they are indivisible and the place where coins are actually stored.

func NewOutput

func NewOutput(value int, address string) Output

NewOutput create a new transaction output.

func (Output) IsLockedWithKey

func (o Output) IsLockedWithKey(pubKeyHash []byte) bool

IsLockedWithKey checks if the output can be used by the owner of the public key.

type Tx

type Tx struct {
	ID      []byte
	Inputs  []Input
	Outputs []Output
	// In Bitcoin, a transaction's fee is equal to the difference between the amount of coins
	// locked in the inputs' referenced outputs and the ones in the new outputs.
	//
	// To make things simpler we just include it as a field, the input surplus will still exist.
	Fee int
}

Tx represents a transaction.

Every new transaction must have at least one input and output, except coinbase.

func New

func New(inputs []Input, outputs []Output, fee int) (*Tx, error)

New returns a new transaction with the inputs and outputs provided.

func NewCoinbase

func NewCoinbase(toAddr, data string, fees int, nextBlockHeight int32) (*Tx, error)

NewCoinbase returns a new coinbase transaction.

func (*Tx) IsCoinbase

func (tx *Tx) IsCoinbase() bool

IsCoinbase checks whether the transaction is coinbase

func (*Tx) Sign

func (tx *Tx) Sign(privKey *ecdsa.PrivateKey, prevTxs map[string]Tx) error

Sign signs the inputs of a transaction.

func (Tx) String

func (tx Tx) String() string

String returns a human-readable representation of a transaction.

func (*Tx) TrimmedCopy

func (tx *Tx) TrimmedCopy() Tx

TrimmedCopy creates a trimmed copy of Transaction to be used in signing.

https://en.bitcoin.it/w/images/en/7/70/Bitcoin_OpCheckSig_InDetail.png

func (*Tx) Verify

func (tx *Tx) Verify(prevTxs map[string]Tx) (bool, error)

Verify validates signatures of transaction inputs.