b99b2c446c
* Added pre-compiled contract 0x04 (mem cpy) * Changed depth error to return the gas instead of consuming
73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
package core
|
|
|
|
import (
|
|
"fmt"
|
|
"math/big"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/state"
|
|
"github.com/ethereum/go-ethereum/vm"
|
|
)
|
|
|
|
type Execution struct {
|
|
env vm.Environment
|
|
address, input []byte
|
|
Gas, price, value *big.Int
|
|
SkipTransfer bool
|
|
}
|
|
|
|
func NewExecution(env vm.Environment, address, input []byte, gas, gasPrice, value *big.Int) *Execution {
|
|
return &Execution{env: env, address: address, input: input, Gas: gas, price: gasPrice, value: value}
|
|
}
|
|
|
|
func (self *Execution) Addr() []byte {
|
|
return self.address
|
|
}
|
|
|
|
func (self *Execution) Call(codeAddr []byte, caller vm.ContextRef) ([]byte, error) {
|
|
// Retrieve the executing code
|
|
code := self.env.State().GetCode(codeAddr)
|
|
|
|
return self.exec(code, codeAddr, caller)
|
|
}
|
|
|
|
func (self *Execution) exec(code, contextAddr []byte, caller vm.ContextRef) (ret []byte, err error) {
|
|
env := self.env
|
|
evm := vm.New(env, vm.DebugVmTy)
|
|
|
|
if env.Depth() == vm.MaxCallDepth {
|
|
caller.ReturnGas(self.Gas, self.price)
|
|
|
|
return nil, vm.DepthError{}
|
|
}
|
|
|
|
from, to := env.State().GetStateObject(caller.Address()), env.State().GetOrNewStateObject(self.address)
|
|
// Skipping transfer is used on testing for the initial call
|
|
if !self.SkipTransfer {
|
|
err = env.Transfer(from, to, self.value)
|
|
if err != nil {
|
|
caller.ReturnGas(self.Gas, self.price)
|
|
|
|
err = fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, from.Balance)
|
|
return
|
|
}
|
|
}
|
|
|
|
snapshot := env.State().Copy()
|
|
start := time.Now()
|
|
ret, err = evm.Run(to, caller, code, self.value, self.Gas, self.price, self.input)
|
|
if err != nil {
|
|
env.State().Set(snapshot)
|
|
}
|
|
chainlogger.Debugf("vm took %v\n", time.Since(start))
|
|
|
|
return
|
|
}
|
|
|
|
func (self *Execution) Create(caller vm.ContextRef) (ret []byte, err error, account *state.StateObject) {
|
|
ret, err = self.exec(self.input, nil, caller)
|
|
account = self.env.State().GetStateObject(self.address)
|
|
|
|
return
|
|
}
|