woop/transaction.go

package main

import (
    "bytes"
    "crypto/sha256"
    "encoding/gob"
    "log"
)

// Transaction represents a Bitcoin transaction
type Transaction struct {
    id       []byte
    txInput  []TXInput
    txOutput []TXOutput
}

type TXOutput struct {
    address string
    value   int
}

type TXInput struct {
    txId          []byte
    txOutputIndex int
    address       string
}

// SetID sets ID of a transaction
func (tx *Transaction) SetId() {
    var encoded bytes.Buffer
    var hash [32]byte

    enc := gob.NewEncoder(&encoded)
    err := enc.Encode(tx)
    if err != nil {
        log.Panic(err)
    }
    hash = sha256.Sum256(encoded.Bytes())
    tx.ID = hash[:]
}