[rosetta] Support EVM pre-process for contract creation txs (#3424)

* [rosetta] Support EVM pre-process for contract creation txs

Signed-off-by: Daniel Van Der Maden <dvandermaden0@berkeley.edu>

* [rosetta] Fix re-delegation amount

Signed-off-by: Daniel Van Der Maden <dvandermaden0@berkeley.edu>

rosetta/services/construction_check.go

@@ -240,16 +240,17 @@ func (s *ConstructAPI) ConstructionMetadata(
 
 	evmErrorMsg := ""
 	evmReturn := hexutil.Bytes{}
-	if !isStakingOperation(options.OperationType) &&
+	if len(data) > 0 && (options.OperationType == common.ContractCreationOperation ||
-		options.OperationType != common.ContractCreationOperation &&
+		options.OperationType == common.NativeTransferOperation) {
-		len(data) > 0 {
 		gas := hexutil.Uint64(estGasUsed)
 		callArgs := rpc.CallArgs{
 			From: senderAddr,
-			To:   &contractAddress,
 			Data: &data,
 			Gas:  &gas,
 		}
+		if options.OperationType == common.NativeTransferOperation {
+			callArgs.To = &contractAddress
+		}
 		evmExe, err := rpc.DoEVMCall(
 			ctx, s.hmy, callArgs, ethRpc.LatestBlockNumber, vm.Config{}, rpc.CallTimeout, s.hmy.RPCGasCap,
 		)

rosetta/services/tx_operation.go

@@ -158,20 +158,16 @@ func getAmountFromDelegateMessage(receipt *hmytypes.Receipt, data []byte) (*type
 		})
 	}
 
-	stkAmount := stkMsg.Amount
+	deductedAmt := stkMsg.Amount
 	logs := hmytypes.FindLogsWithTopic(receipt, staking.DelegateTopic)
 	for _, log := range logs {
-		if len(log.Data) > ethcommon.AddressLength {
+		if len(log.Data) > ethcommon.AddressLength && log.Address == stkMsg.DelegatorAddress {
-			validatorAddress := ethcommon.BytesToAddress(log.Data[:ethcommon.AddressLength])
+			// Remove re-delegation amount as funds were never credited to account's balance.
-			if log.Address == stkMsg.DelegatorAddress && stkMsg.ValidatorAddress == validatorAddress {
+			deductedAmt = new(big.Int).Sub(deductedAmt, new(big.Int).SetBytes(log.Data[ethcommon.AddressLength:]))
-				// Remove re-delegation amount as funds were never credited to account's balance.
-				stkAmount = new(big.Int).Sub(stkAmount, new(big.Int).SetBytes(log.Data[ethcommon.AddressLength:]))
-				break
-			}
 		}
 	}
 	return &types.Amount{
-		Value:    negativeBigValue(stkAmount),
+		Value:    negativeBigValue(deductedAmt),
 		Currency: &common.NativeCurrency,
 	}, nil
 }