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fix failed build

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pull/5/merge
Minh Doan 7 years ago
parent 2844d1d55b
commit 9ffcc8d16e
2 changed files with 110 additions and 93 deletions
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  1. 79
      blockchain/utxopool.go
  2. 18
      blockchain/utxopool_test.go

79
blockchain/utxopool.go
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@ -5,6 +5,7 @@ import (
) )
const ( const (
// MaxNumberOfTransactions is the max number of transaction per a block.
MaxNumberOfTransactions = 100 MaxNumberOfTransactions = 100
) )
@ -16,9 +17,9 @@ type UTXOPool struct {
} }
// VerifyTransactions verifies if a list of transactions valid. // VerifyTransactions verifies if a list of transactions valid.
func (utxopool *UTXOPool) VerifyTransactions(transactions []*Transaction) bool { func (utxoPool *UTXOPool) VerifyTransactions(transactions []*Transaction) bool {
spentTXOs := make(map[string]map[string]map[int]bool) spentTXOs := make(map[string]map[string]map[int]bool)
if utxopool != nil { if utxoPool != nil {
for _, tx := range transactions { for _, tx := range transactions {
inTotal := 0 inTotal := 0
// Calculate the sum of TxInput // Calculate the sum of TxInput
@ -41,7 +42,7 @@ func (utxopool *UTXOPool) VerifyTransactions(transactions []*Transaction) bool {
spentTXOs[in.Address][inTxID][index] = true spentTXOs[in.Address][inTxID][index] = true
// Sum the balance up to the inTotal. // Sum the balance up to the inTotal.
if val, ok := utxopool.utxo[in.Address][inTxID][index]; ok { if val, ok := utxoPool.utxo[in.Address][inTxID][index]; ok {
inTotal += val inTotal += val
} else { } else {
return false return false
@ -61,8 +62,8 @@ func (utxopool *UTXOPool) VerifyTransactions(transactions []*Transaction) bool {
return true return true
} }
// VerifyOneTransactionAndUpdate verifies if a list of transactions valid. // VerifyOneTransaction verifies if a list of transactions valid.
func (utxopool *UTXOPool) VerifyOneTransaction(tx *Transaction) bool { func (utxoPool *UTXOPool) VerifyOneTransaction(tx *Transaction) bool {
spentTXOs := make(map[string]map[string]map[int]bool) spentTXOs := make(map[string]map[string]map[int]bool)
txID := hex.EncodeToString(tx.ID) txID := hex.EncodeToString(tx.ID)
inTotal := 0 inTotal := 0
@ -71,7 +72,7 @@ func (utxopool *UTXOPool) VerifyOneTransaction(tx *Transaction) bool {
inTxID := hex.EncodeToString(in.TxID) inTxID := hex.EncodeToString(in.TxID)
index := in.TxOutputIndex index := in.TxOutputIndex
// Check if the transaction with the addres is spent or not. // Check if the transaction with the addres is spent or not.
if val, ok := utxopool.utxo[in.Address][inTxID][index]; ok { if val, ok := utxoPool.utxo[in.Address][inTxID][index]; ok {
if spentTXOs[in.Address][inTxID][index] { if spentTXOs[in.Address][inTxID][index] {
return false return false
} }
@ -92,7 +93,7 @@ func (utxopool *UTXOPool) VerifyOneTransaction(tx *Transaction) bool {
outTotal := 0 outTotal := 0
// Calculate the sum of TxOutput // Calculate the sum of TxOutput
for index, out := range tx.TxOutput { for index, out := range tx.TxOutput {
if val, ok := spentTXOs[out.Address][txID][index]; ok { if _, ok := spentTXOs[out.Address][txID][index]; ok {
return false return false
} }
outTotal += out.Value outTotal += out.Value
@ -103,69 +104,72 @@ func (utxopool *UTXOPool) VerifyOneTransaction(tx *Transaction) bool {
return true return true
} }
func (utxopool *UTXOPool) Update(tx* Transaction) { // UpdateOneTransaction updates utxoPool in respect to the new Transaction.
if utxopool != nil { func (utxoPool *UTXOPool) UpdateOneTransaction(tx *Transaction) {
if utxoPool != nil {
txID := hex.EncodeToString(tx.ID) txID := hex.EncodeToString(tx.ID)
// Remove // Remove
for _, in := range tx.TxInput { for _, in := range tx.TxInput {
inTxID := hex.EncodeToString(in.TxID) inTxID := hex.EncodeToString(in.TxID)
delete(utxopool.utxo[in.Address][inTxID], in.TxOutputIndex) delete(utxoPool.utxo[in.Address][inTxID], in.TxOutputIndex)
} }
// Update // Update
for index, out := range tx.TxOutput { for index, out := range tx.TxOutput {
if _, ok := utxopool.utxo[out.Address]; !ok { if _, ok := utxoPool.utxo[out.Address]; !ok {
utxopool.utxo[out.Address] = make(map[string]map[int]int) utxoPool.utxo[out.Address] = make(map[string]map[int]int)
utxopool.utxo[out.Address][txID] = make(map[int]int) utxoPool.utxo[out.Address][txID] = make(map[int]int)
} }
if _, ok := utxopool.utxo[out.Address][txID]; !ok { if _, ok := utxoPool.utxo[out.Address][txID]; !ok {
utxopool.utxo[out.Address][txID] = make(map[int]int) utxoPool.utxo[out.Address][txID] = make(map[int]int)
} }
utxopool.utxo[out.Address][txID][index] = out.Value utxoPool.utxo[out.Address][txID][index] = out.Value
} }
} }
} }
func (utxopool *UTXOPool) VerifyOneTransactionAndUpdate(tx *Transaction) bool { // VerifyOneTransactionAndUpdate verifies and update a valid transaction.
if utxopool.VerifyOneTransaction(tx) { // Return false if the transaction is not valid.
utxopool.Update(tx) func (utxoPool *UTXOPool) VerifyOneTransactionAndUpdate(tx *Transaction) bool {
if utxoPool.VerifyOneTransaction(tx) {
utxoPool.UpdateOneTransaction(tx)
return true return true
} }
retur false return false
} }
// VerifyAndUpdate verifies a list of transactions and update utxoPool. // VerifyAndUpdate verifies a list of transactions and update utxoPool.
func (utxopool *UTXOPool) VerifyAndUpdate(transactions []*Transaction) bool { func (utxoPool *UTXOPool) VerifyAndUpdate(transactions []*Transaction) bool {
if utxopool.VerifyTransactions(transactions) { if utxoPool.VerifyTransactions(transactions) {
utxopool.Update(transactions) utxoPool.Update(transactions)
return true return true
} }
return false return false
} }
// Update utxo balances with a list of new transactions. // Update utxo balances with a list of new transactions.
func (utxopool *UTXOPool) Update(transactions []*Transaction) { func (utxoPool *UTXOPool) Update(transactions []*Transaction) {
if utxopool != nil { if utxoPool != nil {
for _, tx := range transactions { for _, tx := range transactions {
curTxID := hex.EncodeToString(tx.ID) curTxID := hex.EncodeToString(tx.ID)
// Remove // Remove
for _, in := range tx.TxInput { for _, in := range tx.TxInput {
inTxID := hex.EncodeToString(in.TxID) inTxID := hex.EncodeToString(in.TxID)
delete(utxopool.utxo[in.Address][inTxID], in.TxOutputIndex) delete(utxoPool.utxo[in.Address][inTxID], in.TxOutputIndex)
} }
// Update // Update
for index, out := range tx.TxOutput { for index, out := range tx.TxOutput {
if _, ok := utxopool.utxo[out.Address]; !ok { if _, ok := utxoPool.utxo[out.Address]; !ok {
utxopool.utxo[out.Address] = make(map[string]map[int]int) utxoPool.utxo[out.Address] = make(map[string]map[int]int)
utxopool.utxo[out.Address][curTxID] = make(map[int]int) utxoPool.utxo[out.Address][curTxID] = make(map[int]int)
} }
if _, ok := utxopool.utxo[out.Address][curTxID]; !ok { if _, ok := utxoPool.utxo[out.Address][curTxID]; !ok {
utxopool.utxo[out.Address][curTxID] = make(map[int]int) utxoPool.utxo[out.Address][curTxID] = make(map[int]int)
} }
utxopool.utxo[out.Address][curTxID][index] = out.Value utxoPool.utxo[out.Address][curTxID][index] = out.Value
} }
} }
} }
@ -191,13 +195,14 @@ func CreateUTXOPoolFromGenesisBlockChain(bc *Blockchain) *UTXOPool {
} }
// SelectTransactionsForNewBlock returns a list of index of valid transactions for the new block. // SelectTransactionsForNewBlock returns a list of index of valid transactions for the new block.
func (utxoPool *UTXOPool) SelectTransactionsForNewBlock(transactions []*Transaction) (selected, unselected []*Transaction) { func (utxoPool *UTXOPool) SelectTransactionsForNewBlock(transactions []*Transaction) ([]*Transaction, []*Transaction) {
selected, unselected = []*Transaction{}, []*Transaction{} selected, unselected := []*Transaction{}, []*Transaction{}
for id, tx := range transactions { for _, tx := range transactions {
if len(selected) < MaxNumberOfTransactions && utxoPool.VerifyOneTransactionAndUpdate(tx) { if len(selected) < MaxNumberOfTransactions && utxoPool.VerifyOneTransactionAndUpdate(tx) {
append(selected, tx) selected = append(selected, tx)
} else { } else {
append(unselected, tx) unselected = append(unselected, tx)
} }
} }
return selected, unselected
} }

18
blockchain/utxopool_test.go
Unescape View File

@ -4,8 +4,20 @@ import (
"testing" "testing"
) )
func TestVerifyTransactions(t *testing.T) { func TestVerifyOneTransactionAndUpdate(t *testing.T) {
if cbtx := NewCoinbaseTX("minh", genesisCoinbaseData); cbtx == nil { bc := CreateBlockchain("minh")
t.Errorf("failed to create a coinbase transaction.") utxoPool := CreateUTXOPoolFromGenesisBlockChain(bc)
bc.AddNewUserTransfer(utxoPool, "minh", "alok", 3)
bc.AddNewUserTransfer(utxoPool, "minh", "rj", 100)
tx := bc.NewUTXOTransaction("minh", "mark", 10)
if tx == nil {
t.Error("failed to create a new transaction.")
} }
// if utxoPool.VerifyOneTransaction(tx) {
// t.Error("failed to verify a valid transaction.")
// }
} }

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