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shardProcess.go
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shardProcess.go
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package transaction
import (
"math/big"
"github.com/ElrondNetwork/elrond-go/core/logger"
"github.com/ElrondNetwork/elrond-go/data/state"
"github.com/ElrondNetwork/elrond-go/data/transaction"
"github.com/ElrondNetwork/elrond-go/hashing"
"github.com/ElrondNetwork/elrond-go/marshal"
"github.com/ElrondNetwork/elrond-go/process"
"github.com/ElrondNetwork/elrond-go/sharding"
)
var log = logger.DefaultLogger()
// txProcessor implements TransactionProcessor interface and can modify account states according to a transaction
type txProcessor struct {
*baseTxProcessor
hasher hashing.Hasher
scProcessor process.SmartContractProcessor
marshalizer marshal.Marshalizer
txFeeHandler process.TransactionFeeHandler
txTypeHandler process.TxTypeHandler
shardCoordinator sharding.Coordinator
economicsFee process.FeeHandler
}
// NewTxProcessor creates a new txProcessor engine
func NewTxProcessor(
accounts state.AccountsAdapter,
hasher hashing.Hasher,
addressConv state.AddressConverter,
marshalizer marshal.Marshalizer,
shardCoordinator sharding.Coordinator,
scProcessor process.SmartContractProcessor,
txFeeHandler process.TransactionFeeHandler,
txTypeHandler process.TxTypeHandler,
economicsFee process.FeeHandler,
) (*txProcessor, error) {
if accounts == nil || accounts.IsInterfaceNil() {
return nil, process.ErrNilAccountsAdapter
}
if hasher == nil || hasher.IsInterfaceNil() {
return nil, process.ErrNilHasher
}
if addressConv == nil || addressConv.IsInterfaceNil() {
return nil, process.ErrNilAddressConverter
}
if marshalizer == nil || marshalizer.IsInterfaceNil() {
return nil, process.ErrNilMarshalizer
}
if shardCoordinator == nil || shardCoordinator.IsInterfaceNil() {
return nil, process.ErrNilShardCoordinator
}
if scProcessor == nil || scProcessor.IsInterfaceNil() {
return nil, process.ErrNilSmartContractProcessor
}
if txFeeHandler == nil || txFeeHandler.IsInterfaceNil() {
return nil, process.ErrNilUnsignedTxHandler
}
if txTypeHandler == nil || txTypeHandler.IsInterfaceNil() {
return nil, process.ErrNilTxTypeHandler
}
if economicsFee == nil || economicsFee.IsInterfaceNil() {
return nil, process.ErrNilEconomicsFeeHandler
}
baseTxProcess := &baseTxProcessor{
accounts: accounts,
shardCoordinator: shardCoordinator,
adrConv: addressConv,
}
return &txProcessor{
baseTxProcessor: baseTxProcess,
hasher: hasher,
marshalizer: marshalizer,
scProcessor: scProcessor,
txFeeHandler: txFeeHandler,
txTypeHandler: txTypeHandler,
economicsFee: economicsFee,
}, nil
}
// ProcessTransaction modifies the account states in respect with the transaction data
func (txProc *txProcessor) ProcessTransaction(tx *transaction.Transaction, roundIndex uint64) error {
if tx == nil || tx.IsInterfaceNil() {
return process.ErrNilTransaction
}
adrSrc, adrDst, err := txProc.getAddresses(tx)
if err != nil {
return err
}
acntSnd, err := txProc.getAccountFromAddress(adrSrc)
if err != nil {
return err
}
err = txProc.checkTxValues(tx, acntSnd)
if err != nil {
return err
}
txType, err := txProc.txTypeHandler.ComputeTransactionType(tx)
if err != nil {
return err
}
switch txType {
case process.MoveBalance:
return txProc.processMoveBalance(tx, adrSrc, adrDst)
case process.SCDeployment:
return txProc.processSCDeployment(tx, adrSrc, roundIndex)
case process.SCInvoking:
return txProc.processSCInvoking(tx, adrSrc, adrDst, roundIndex)
}
return process.ErrWrongTransaction
}
func (txProc *txProcessor) processTxFee(tx *transaction.Transaction, acntSnd *state.Account) (*big.Int, error) {
if acntSnd == nil {
return nil, nil
}
err := txProc.economicsFee.CheckValidityTxValues(tx)
if err != nil {
return nil, err
}
cost := txProc.economicsFee.ComputeFee(tx)
if acntSnd.Balance.Cmp(cost) < 0 {
return nil, process.ErrInsufficientFunds
}
operation := big.NewInt(0)
err = acntSnd.SetBalanceWithJournal(operation.Sub(acntSnd.Balance, cost))
if err != nil {
return nil, err
}
return cost, nil
}
func (txProc *txProcessor) processMoveBalance(
tx *transaction.Transaction,
adrSrc, adrDst state.AddressContainer,
) error {
// getAccounts returns acntSrc not nil if the adrSrc is in the node shard, the same, acntDst will be not nil
// if adrDst is in the node shard. If an error occurs it will be signaled in err variable.
acntSrc, acntDst, err := txProc.getAccounts(adrSrc, adrDst)
if err != nil {
return err
}
txFee, err := txProc.processTxFee(tx, acntSrc)
if err != nil {
return err
}
value := tx.Value
err = txProc.moveBalances(acntSrc, acntDst, value)
if err != nil {
return err
}
// is sender address in node shard
if acntSrc != nil {
err = txProc.increaseNonce(acntSrc)
if err != nil {
return err
}
}
txProc.txFeeHandler.ProcessTransactionFee(txFee)
return nil
}
func (txProc *txProcessor) processSCDeployment(
tx *transaction.Transaction,
adrSrc state.AddressContainer,
roundIndex uint64,
) error {
// getAccounts returns acntSrc not nil if the adrSrc is in the node shard, the same, acntDst will be not nil
// if adrDst is in the node shard. If an error occurs it will be signaled in err variable.
acntSrc, err := txProc.getAccountFromAddress(adrSrc)
if err != nil {
return err
}
err = txProc.scProcessor.DeploySmartContract(tx, acntSrc, roundIndex)
return err
}
func (txProc *txProcessor) processSCInvoking(
tx *transaction.Transaction,
adrSrc, adrDst state.AddressContainer,
roundIndex uint64,
) error {
// getAccounts returns acntSrc not nil if the adrSrc is in the node shard, the same, acntDst will be not nil
// if adrDst is in the node shard. If an error occurs it will be signaled in err variable.
acntSrc, acntDst, err := txProc.getAccounts(adrSrc, adrDst)
if err != nil {
return err
}
err = txProc.scProcessor.ExecuteSmartContractTransaction(tx, acntSrc, acntDst, roundIndex)
return err
}
func (txProc *txProcessor) moveBalances(acntSrc, acntDst *state.Account,
value *big.Int,
) error {
operation1 := big.NewInt(0)
operation2 := big.NewInt(0)
// is sender address in node shard
if acntSrc != nil {
err := acntSrc.SetBalanceWithJournal(operation1.Sub(acntSrc.Balance, value))
if err != nil {
return err
}
}
// is receiver address in node shard
if acntDst != nil {
err := acntDst.SetBalanceWithJournal(operation2.Add(acntDst.Balance, value))
if err != nil {
return err
}
}
return nil
}
func (txProc *txProcessor) increaseNonce(acntSrc *state.Account) error {
return acntSrc.SetNonceWithJournal(acntSrc.Nonce + 1)
}
// IsInterfaceNil returns true if there is no value under the interface
func (txProc *txProcessor) IsInterfaceNil() bool {
if txProc == nil {
return true
}
return false
}