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transactionType.go
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/
transactionType.go
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package coordinator
import (
"bytes"
"github.com/ElrondNetwork/elrond-go-core/core"
"github.com/ElrondNetwork/elrond-go-core/core/atomic"
"github.com/ElrondNetwork/elrond-go-core/core/check"
"github.com/ElrondNetwork/elrond-go-core/data"
"github.com/ElrondNetwork/elrond-go-core/data/smartContractResult"
"github.com/ElrondNetwork/elrond-go-core/data/vm"
"github.com/ElrondNetwork/elrond-go/process"
"github.com/ElrondNetwork/elrond-go/sharding"
vmcommon "github.com/ElrondNetwork/elrond-vm-common"
)
var _ process.TxTypeHandler = (*txTypeHandler)(nil)
type txTypeHandler struct {
pubkeyConv core.PubkeyConverter
shardCoordinator sharding.Coordinator
builtInFunctions vmcommon.BuiltInFunctionContainer
argumentParser process.CallArgumentsParser
flagRelayedTxV2 atomic.Flag
relayedTxV2EnableEpoch uint32
esdtTransferParser vmcommon.ESDTTransferParser
}
// ArgNewTxTypeHandler defines the arguments needed to create a new tx type handler
type ArgNewTxTypeHandler struct {
PubkeyConverter core.PubkeyConverter
ShardCoordinator sharding.Coordinator
BuiltInFunctions vmcommon.BuiltInFunctionContainer
ArgumentParser process.CallArgumentsParser
RelayedTxV2EnableEpoch uint32
EpochNotifier process.EpochNotifier
ESDTTransferParser vmcommon.ESDTTransferParser
}
// NewTxTypeHandler creates a transaction type handler
func NewTxTypeHandler(
args ArgNewTxTypeHandler,
) (*txTypeHandler, error) {
if check.IfNil(args.PubkeyConverter) {
return nil, process.ErrNilPubkeyConverter
}
if check.IfNil(args.ShardCoordinator) {
return nil, process.ErrNilShardCoordinator
}
if check.IfNil(args.ArgumentParser) {
return nil, process.ErrNilArgumentParser
}
if check.IfNil(args.BuiltInFunctions) {
return nil, process.ErrNilBuiltInFunction
}
if check.IfNil(args.EpochNotifier) {
return nil, process.ErrNilEpochNotifier
}
if check.IfNil(args.ESDTTransferParser) {
return nil, process.ErrNilESDTTransferParser
}
tc := &txTypeHandler{
pubkeyConv: args.PubkeyConverter,
shardCoordinator: args.ShardCoordinator,
argumentParser: args.ArgumentParser,
builtInFunctions: args.BuiltInFunctions,
relayedTxV2EnableEpoch: args.RelayedTxV2EnableEpoch,
esdtTransferParser: args.ESDTTransferParser,
}
args.EpochNotifier.RegisterNotifyHandler(tc)
log.Debug("txTypeHandler: enable epoch for relayed transactions v2", "epoch", args.RelayedTxV2EnableEpoch)
return tc, nil
}
// ComputeTransactionType calculates the transaction type
func (tth *txTypeHandler) ComputeTransactionType(tx data.TransactionHandler) (process.TransactionType, process.TransactionType) {
err := tth.checkTxValidity(tx)
if err != nil {
return process.InvalidTransaction, process.InvalidTransaction
}
isEmptyAddress := tth.isDestAddressEmpty(tx)
if isEmptyAddress {
if len(tx.GetData()) > 0 {
return process.SCDeployment, process.SCDeployment
}
return process.InvalidTransaction, process.InvalidTransaction
}
if len(tx.GetData()) == 0 {
return process.MoveBalance, process.MoveBalance
}
funcName, args := tth.getFunctionFromArguments(tx.GetData())
isBuiltInFunction := tth.isBuiltInFunctionCall(funcName)
if isBuiltInFunction {
if tth.isSCCallAfterBuiltIn(funcName, args, tx) {
return process.BuiltInFunctionCall, process.SCInvoking
}
return process.BuiltInFunctionCall, process.BuiltInFunctionCall
}
if isAsynchronousCallBack(tx) {
return process.SCInvoking, process.SCInvoking
}
if len(funcName) == 0 {
return process.MoveBalance, process.MoveBalance
}
if tth.isRelayedTransactionV1(funcName) {
return process.RelayedTx, process.RelayedTx
}
if tth.isRelayedTransactionV2(funcName) {
return process.RelayedTxV2, process.RelayedTxV2
}
isDestInSelfShard := tth.isDestAddressInSelfShard(tx.GetRcvAddr())
if isDestInSelfShard && core.IsSmartContractAddress(tx.GetRcvAddr()) {
return process.SCInvoking, process.SCInvoking
}
if core.IsSmartContractAddress(tx.GetRcvAddr()) {
return process.MoveBalance, process.SCInvoking
}
return process.MoveBalance, process.MoveBalance
}
func isAsynchronousCallBack(tx data.TransactionHandler) bool {
scr, ok := tx.(*smartContractResult.SmartContractResult)
if !ok {
return false
}
return scr.CallType == vm.AsynchronousCallBack
}
func (tth *txTypeHandler) isSCCallAfterBuiltIn(function string, args [][]byte, tx data.TransactionHandler) bool {
if len(args) <= 2 {
return false
}
parsedTransfer, err := tth.esdtTransferParser.ParseESDTTransfers(tx.GetSndAddr(), tx.GetRcvAddr(), function, args)
if err != nil {
return false
}
if len(parsedTransfer.CallFunction) == 0 {
return false
}
return core.IsSmartContractAddress(parsedTransfer.RcvAddr)
}
func (tth *txTypeHandler) getFunctionFromArguments(txData []byte) (string, [][]byte) {
if len(txData) == 0 {
return "", nil
}
function, args, err := tth.argumentParser.ParseData(string(txData))
if err != nil {
return "", nil
}
return function, args
}
func (tth *txTypeHandler) isBuiltInFunctionCall(functionName string) bool {
function, err := tth.builtInFunctions.Get(functionName)
if err != nil {
return false
}
return function.IsActive()
}
func (tth *txTypeHandler) isRelayedTransactionV1(functionName string) bool {
return functionName == core.RelayedTransaction
}
func (tth *txTypeHandler) isRelayedTransactionV2(functionName string) bool {
if !tth.flagRelayedTxV2.IsSet() {
return false
}
return functionName == core.RelayedTransactionV2
}
func (tth *txTypeHandler) isDestAddressEmpty(tx data.TransactionHandler) bool {
isEmptyAddress := bytes.Equal(tx.GetRcvAddr(), make([]byte, tth.pubkeyConv.Len()))
return isEmptyAddress
}
func (tth *txTypeHandler) isDestAddressInSelfShard(address []byte) bool {
shardForCurrentNode := tth.shardCoordinator.SelfId()
shardForSrc := tth.shardCoordinator.ComputeId(address)
return shardForCurrentNode == shardForSrc
}
func (tth *txTypeHandler) checkTxValidity(tx data.TransactionHandler) error {
if check.IfNil(tx) {
return process.ErrNilTransaction
}
recvAddressIsInvalid := tth.pubkeyConv.Len() != len(tx.GetRcvAddr())
if recvAddressIsInvalid {
return process.ErrWrongTransaction
}
return nil
}
// EpochConfirmed is called whenever a new epoch is confirmed
func (tth *txTypeHandler) EpochConfirmed(epoch uint32, _ uint64) {
tth.flagRelayedTxV2.SetValue(epoch >= tth.relayedTxV2EnableEpoch)
log.Debug("txTypeHandler: relayed transactions v2", "enabled", tth.flagRelayedTxV2.IsSet())
}
// IsInterfaceNil returns true if there is no value under the interface
func (tth *txTypeHandler) IsInterfaceNil() bool {
return tth == nil
}