mirror of https://github.com/poanetwork/quorum.git
80 lines
2.0 KiB
Go
80 lines
2.0 KiB
Go
package ethvm
|
|
|
|
import (
|
|
"fmt"
|
|
"math/big"
|
|
|
|
"github.com/ethereum/eth-go/ethstate"
|
|
"github.com/ethereum/eth-go/ethutil"
|
|
)
|
|
|
|
type Execution struct {
|
|
vm VirtualMachine
|
|
closure *Closure
|
|
address, input []byte
|
|
gas, price, value *big.Int
|
|
object *ethstate.StateObject
|
|
}
|
|
|
|
func NewExecution(vm VirtualMachine, address, input []byte, gas, gasPrice, value *big.Int) *Execution {
|
|
return &Execution{vm: vm, address: address, input: input, gas: gas, price: gasPrice, value: value}
|
|
}
|
|
|
|
func (self *Execution) Addr() []byte {
|
|
return self.address
|
|
}
|
|
|
|
func (self *Execution) Exec(codeAddr []byte, caller ClosureRef) (ret []byte, err error) {
|
|
env := self.vm.Env()
|
|
|
|
snapshot := env.State().Copy()
|
|
|
|
msg := env.State().Manifest().AddMessage(ðstate.Message{
|
|
To: self.address, From: caller.Address(),
|
|
Input: self.input,
|
|
Origin: env.Origin(),
|
|
Block: env.BlockHash(), Timestamp: env.Time(), Coinbase: env.Coinbase(), Number: env.BlockNumber(),
|
|
Value: self.value,
|
|
})
|
|
|
|
object := caller.Object()
|
|
if object.Balance.Cmp(self.value) < 0 {
|
|
caller.ReturnGas(self.gas, self.price)
|
|
|
|
err = fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, object.Balance)
|
|
} else {
|
|
stateObject := env.State().GetOrNewStateObject(self.address)
|
|
self.object = stateObject
|
|
|
|
caller.Object().SubAmount(self.value)
|
|
stateObject.AddAmount(self.value)
|
|
|
|
// Precompiled contracts (address.go) 1, 2 & 3.
|
|
if p := Precompiled[ethutil.BigD(codeAddr).Uint64()]; p != nil {
|
|
if self.gas.Cmp(p.Gas) >= 0 {
|
|
ret = p.Call(self.input)
|
|
}
|
|
} else {
|
|
if self.vm.Depth() == MaxCallDepth {
|
|
return nil, fmt.Errorf("Max call depth exceeded (%d)", MaxCallDepth)
|
|
}
|
|
|
|
// Retrieve the executing code
|
|
code := env.State().GetCode(codeAddr)
|
|
|
|
// Create a new callable closure
|
|
c := NewClosure(msg, caller, stateObject, code, self.gas, self.price)
|
|
// Executer the closure and get the return value (if any)
|
|
ret, _, err = c.Call(self.vm, self.input)
|
|
|
|
msg.Output = ret
|
|
}
|
|
}
|
|
|
|
if err != nil {
|
|
env.State().Set(snapshot)
|
|
}
|
|
|
|
return
|
|
}
|