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blockchain_go
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Use Hash funcion to set transaction ID

This commit is contained in:
Ivan Kuznetsov 2017-09-10 13:34:47 +07:00
parent 5f9e6c0c91
commit 7290aaac64
1 changed files with 4 additions and 19 deletions
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23
transaction.go
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@ -54,21 +54,6 @@ func (tx *Transaction) Hash() []byte {
return hash[:] return hash[:]
} }
// SetID sets ID of a transaction
// TODO: Remove this
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[:]
}
// Sign signs each input of a Transaction // Sign signs each input of a Transaction
func (tx *Transaction) Sign(privKey ecdsa.PrivateKey, prevTXs map[string]Transaction) { func (tx *Transaction) Sign(privKey ecdsa.PrivateKey, prevTXs map[string]Transaction) {
if tx.IsCoinbase() { if tx.IsCoinbase() {
@ -86,7 +71,7 @@ func (tx *Transaction) Sign(privKey ecdsa.PrivateKey, prevTXs map[string]Transac
for inID, vin := range txCopy.Vin { for inID, vin := range txCopy.Vin {
prevTx := prevTXs[hex.EncodeToString(vin.Txid)] prevTx := prevTXs[hex.EncodeToString(vin.Txid)]
txCopy.Vin[inID].ScriptSig = prevTx.Vout[vin.Vout].ScriptPubKey txCopy.Vin[inID].ScriptSig = prevTx.Vout[vin.Vout].ScriptPubKey
txCopy.SetID() txCopy.ID = txCopy.Hash()
txCopy.Vin[inID].ScriptSig = []byte{} txCopy.Vin[inID].ScriptSig = []byte{}
r, s, err := ecdsa.Sign(rand.Reader, &privKey, txCopy.ID) r, s, err := ecdsa.Sign(rand.Reader, &privKey, txCopy.ID)
@ -160,7 +145,7 @@ func (tx *Transaction) Verify(prevTXs map[string]Transaction) bool {
for inID, vin := range tx.Vin { for inID, vin := range tx.Vin {
prevTx := prevTXs[hex.EncodeToString(vin.Txid)] prevTx := prevTXs[hex.EncodeToString(vin.Txid)]
txCopy.Vin[inID].ScriptSig = prevTx.Vout[vin.Vout].ScriptPubKey txCopy.Vin[inID].ScriptSig = prevTx.Vout[vin.Vout].ScriptPubKey
txCopy.SetID() txCopy.ID = txCopy.Hash()
txCopy.Vin[inID].ScriptSig = []byte{} txCopy.Vin[inID].ScriptSig = []byte{}
signature := vin.ScriptSig[:sigLen] signature := vin.ScriptSig[:sigLen]
@ -195,7 +180,7 @@ func NewCoinbaseTX(to, data string) *Transaction {
txin := TXInput{[]byte{}, -1, []byte(data)} txin := TXInput{[]byte{}, -1, []byte(data)}
txout := NewTXOutput(subsidy, to) txout := NewTXOutput(subsidy, to)
tx := Transaction{nil, []TXInput{txin}, []TXOutput{*txout}} tx := Transaction{nil, []TXInput{txin}, []TXOutput{*txout}}
tx.SetID() tx.ID = tx.Hash()
return &tx return &tx
} }
@ -237,7 +222,7 @@ func NewUTXOTransaction(from, to string, amount int, bc *Blockchain) *Transactio
} }
tx := Transaction{nil, inputs, outputs} tx := Transaction{nil, inputs, outputs}
tx.SetID() tx.ID = tx.Hash()
bc.SignTransaction(&tx, wallet.PrivateKey) bc.SignTransaction(&tx, wallet.PrivateKey)
return &tx return &tx