func (self *Execution) exec(contextAddr *common.Address, code []byte, caller vm.ContextRef) (ret []byte, err error) {
start := time.Now()
env := self.env
evm := self.evm
if env.Depth() > int(params.CallCreateDepth.Int64()) {
caller.ReturnGas(self.Gas, self.price)
return nil, vm.DepthError{}
}
vsnapshot := env.State().Copy()
var createAccount bool
if self.address == nil {
// Generate a new address
nonce := env.State().GetNonce(caller.Address())
env.State().SetNonce(caller.Address(), nonce+1)
addr := crypto.CreateAddress(caller.Address(), nonce)
self.address = &addr
createAccount = true
}
snapshot := env.State().Copy()
var (
from = env.State().GetStateObject(caller.Address())
to *state.StateObject
)
if createAccount {
to = env.State().CreateAccount(*self.address)
} else {
to = env.State().GetOrNewStateObject(*self.address)
}
err = env.Transfer(from, to, self.value)
if err != nil {
env.State().Set(vsnapshot)
caller.ReturnGas(self.Gas, self.price)
return nil, ValueTransferErr("insufficient funds to transfer value. Req %v, has %v", self.value, from.Balance())
}
context := vm.NewContext(caller, to, self.value, self.Gas, self.price)
context.SetCallCode(contextAddr, code)
ret, err = evm.Run(context, self.input)
evm.Printf("message call took %v", time.Since(start)).Endl()
if err != nil {
env.State().Set(snapshot)
}
return
}
func (self *Env) CallCode(caller vm.ContextRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
if self.vmTest && self.depth > 0 {
caller.ReturnGas(gas, price)
return nil, nil
}
caddr := caller.Address()
exe := self.vm(&caddr, data, gas, price, value)
return exe.Call(addr, caller)
}
func (self *Env) Create(caller vm.ContextRef, data []byte, gas, price, value *big.Int) ([]byte, error, vm.ContextRef) {
exe := self.vm(nil, data, gas, price, value)
if self.vmTest {
caller.ReturnGas(gas, price)
nonce := self.state.GetNonce(caller.Address())
obj := self.state.GetOrNewStateObject(crypto.CreateAddress(caller.Address(), nonce))
return nil, nil, obj
} else {
return exe.Create(caller)
}
}
func (self *Env) Call(caller vm.ContextRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
if self.vmTest && self.depth > 0 {
caller.ReturnGas(gas, price)
return nil, nil
}
exe := self.vm(&addr, data, gas, price, value)
ret, err := exe.Call(addr, caller)
self.Gas = exe.Gas
return ret, err
}
// exec executes the given code and executes within the contextAddr context.
func (self *Execution) exec(contextAddr *common.Address, code []byte, caller vm.ContextRef) (ret []byte, err error) {
env := self.env
evm := self.evm
// Depth check execution. Fail if we're trying to execute above the
// limit.
if env.Depth() > int(params.CallCreateDepth.Int64()) {
caller.ReturnGas(self.Gas, self.price)
return nil, vm.DepthError
}
if !env.CanTransfer(env.State().GetStateObject(caller.Address()), self.value) {
caller.ReturnGas(self.Gas, self.price)
return nil, ValueTransferErr("insufficient funds to transfer value. Req %v, has %v", self.value, env.State().GetBalance(caller.Address()))
}
var createAccount bool
if self.address == nil {
// Generate a new address
nonce := env.State().GetNonce(caller.Address())
env.State().SetNonce(caller.Address(), nonce+1)
addr := crypto.CreateAddress(caller.Address(), nonce)
self.address = &addr
createAccount = true
}
snapshot := env.State().Copy()
var (
from = env.State().GetStateObject(caller.Address())
to *state.StateObject
)
if createAccount {
to = env.State().CreateAccount(*self.address)
} else {
to = env.State().GetOrNewStateObject(*self.address)
}
vm.Transfer(from, to, self.value)
context := vm.NewContext(caller, to, self.value, self.Gas, self.price)
context.SetCallCode(contextAddr, code)
ret, err = evm.Run(context, self.input)
if err != nil {
env.State().Set(snapshot)
}
return
}