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query.go
executable file
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query.go
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// Copyright Fuzamei Corp. 2018 All Rights Reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package executor
import (
"fmt"
"math/big"
"strings"
"errors"
"github.com/33cn/chain33/types"
"github.com/aBitcoinDiamond/slave/executor/evm/executor/vm/common"
"github.com/aBitcoinDiamond/slave/executor/evm/executor/vm/model"
evmtypes "github.com/aBitcoinDiamond/slave/executor/evm/types"
)
// Query_CheckAddrExists 检查合约地址是否存在,此操作不会改变任何状态,所以可以直接从statedb查询
func (evm *EVMExecutor) Query_CheckAddrExists(in *evmtypes.CheckEVMAddrReq) (types.Message, error) {
evm.CheckInit()
addrStr := in.Addr
if len(addrStr) == 0 {
return nil, model.ErrAddrNotExists
}
var addr common.Address
// 合约名称
if strings.HasPrefix(addrStr, types.ExecName(evmtypes.EvmPrefix)) {
addr = common.ExecAddress(addrStr)
} else {
// 合约地址
nAddr := common.StringToAddress(addrStr)
if nAddr == nil {
return nil, model.ErrAddrNotExists
}
addr = *nAddr
}
exists := evm.GetMStateDB().Exist(addr.String())
ret := &evmtypes.CheckEVMAddrResp{Contract: exists}
if exists {
account := evm.GetMStateDB().GetAccount(addr.String())
if account != nil {
ret.ContractAddr = account.Addr
ret.ContractName = account.GetExecName()
ret.AliasName = account.GetAliasName()
}
}
return ret, nil
}
// Query_EstimateGas 此方法用来估算合约消耗的Gas,不能修改原有执行器的状态数据
func (evm *EVMExecutor) Query_EstimateGas(in *evmtypes.EstimateEVMGasReq) (types.Message, error) {
evm.CheckInit()
var (
caller common.Address
)
// 如果未指定调用地址,则直接使用一个虚拟的地址发起调用
if len(in.Caller) > 0 {
callAddr := common.StringToAddress(in.Caller)
if callAddr != nil {
caller = *callAddr
}
} else {
caller = common.ExecAddress(types.ExecName(evmtypes.ExecutorName))
}
to := common.StringToAddress(in.To)
if to == nil {
to = common.StringToAddress(EvmAddress)
}
msg := common.NewMessage(caller, to, 0, in.Amount, evmtypes.MaxGasLimit, 1, in.Code, "estimateGas", in.Abi)
txHash := common.BigToHash(big.NewInt(evmtypes.MaxGasLimit)).Bytes()
receipt, err := evm.innerExec(msg, txHash, 1, evmtypes.MaxGasLimit, false)
if err != nil {
return nil, err
}
if receipt.Ty == types.ExecOk {
callData := getCallReceipt(receipt.GetLogs())
if callData != nil {
result := &evmtypes.EstimateEVMGasResp{}
result.Gas = callData.UsedGas
return result, nil
}
}
return nil, errors.New("contract call error")
}
// 从日志中查找调用结果
func getCallReceipt(logs []*types.ReceiptLog) *evmtypes.ReceiptEVMContract {
if len(logs) == 0 {
return nil
}
for _, v := range logs {
if v.Ty == evmtypes.TyLogCallContract {
var res evmtypes.ReceiptEVMContract
err := types.Decode(v.Log, &res)
if err != nil {
return nil
}
return &res
}
}
return nil
}
// Query_EvmDebug 此方法用来估算合约消耗的Gas,不能修改原有执行器的状态数据
func (evm *EVMExecutor) Query_EvmDebug(in *evmtypes.EvmDebugReq) (types.Message, error) {
evm.CheckInit()
optype := in.Optype
if optype < 0 {
evmDebug = false
} else if optype > 0 {
evmDebug = true
}
ret := &evmtypes.EvmDebugResp{DebugStatus: fmt.Sprintf("%v", evmDebug)}
return ret, nil
}
// Query_Query 此方法用来调用合约的只读接口,不修改原有执行器的状态数据
func (evm *EVMExecutor) Query_Query(in *evmtypes.EvmQueryReq) (types.Message, error) {
evm.CheckInit()
ret := &evmtypes.EvmQueryResp{}
ret.Address = in.Address
ret.Input = in.Input
ret.Caller = in.Caller
var (
caller common.Address
)
to := common.StringToAddress(in.Address)
if to == nil {
ret.JsonData = fmt.Sprintf("invalid address:%v", in.Address)
return ret, nil
}
// 如果未指定调用地址,则直接使用一个虚拟的地址发起调用
if len(in.Caller) > 0 {
callAddr := common.StringToAddress(in.Caller)
if callAddr != nil {
caller = *callAddr
}
} else {
caller = common.ExecAddress(types.ExecName(evmtypes.ExecutorName))
}
msg := common.NewMessage(caller, common.StringToAddress(in.Address), 0, 0, evmtypes.MaxGasLimit, 1, nil, "estimateGas", in.Input)
txHash := common.BigToHash(big.NewInt(evmtypes.MaxGasLimit)).Bytes()
receipt, err := evm.innerExec(msg, txHash, 1, evmtypes.MaxGasLimit, true)
if err != nil {
ret.JsonData = fmt.Sprintf("%v", err)
return ret, nil
}
if receipt.Ty == types.ExecOk {
callData := getCallReceipt(receipt.GetLogs())
if callData != nil {
ret.RawData = common.Bytes2Hex(callData.Ret)
ret.JsonData = callData.JsonRet
return ret, nil
}
}
return ret, nil
}
// Query_QueryABI 此方法用来查询合约绑定的ABI数据,不修改原有执行器的状态数据
func (evm *EVMExecutor) Query_QueryABI(in *evmtypes.EvmQueryAbiReq) (types.Message, error) {
evm.CheckInit()
addr := common.StringToAddress(in.GetAddress())
if addr == nil {
return nil, fmt.Errorf("invalid address: %v", in.GetAddress())
}
abiData := evm.mStateDB.GetAbi(addr.String())
return &evmtypes.EvmQueryAbiResp{Address: in.GetAddress(), Abi: abiData}, nil
}