// Run a contract's code on an isolated and unpersisted state
// Cannot be used to create new contracts
func Call(fromAddress, toAddress, data []byte) (*ctypes.ResultCall, error) {
st := consensusState.GetState() // performs a copy
cache := state.NewBlockCache(st)
outAcc := cache.GetAccount(toAddress)
if outAcc == nil {
return nil, fmt.Errorf("Account %x does not exist", toAddress)
}
callee := toVMAccount(outAcc)
caller := &vm.Account{Address: LeftPadWord256(fromAddress)}
txCache := state.NewTxCache(cache)
params := vm.Params{
BlockHeight: int64(st.LastBlockHeight),
BlockHash: LeftPadWord256(st.LastBlockHash),
BlockTime: st.LastBlockTime.Unix(),
GasLimit: st.GetGasLimit(),
}
vmach := vm.NewVM(txCache, params, caller.Address, nil)
gas := st.GetGasLimit()
ret, err := vmach.Call(caller, callee, callee.Code, data, 0, &gas)
if err != nil {
return nil, err
}
return &ctypes.ResultCall{Return: ret}, nil
}
// Run the given code on an isolated and unpersisted state
// Cannot be used to create new contracts
func CallCode(fromAddress, code, data []byte) (*ctypes.ResultCall, error) {
st := consensusState.GetState() // performs a copy
cache := mempoolReactor.Mempool.GetCache()
callee := &vm.Account{Address: LeftPadWord256(fromAddress)}
caller := &vm.Account{Address: LeftPadWord256(fromAddress)}
txCache := state.NewTxCache(cache)
params := vm.Params{
BlockHeight: int64(st.LastBlockHeight),
BlockHash: LeftPadWord256(st.LastBlockHash),
BlockTime: st.LastBlockTime.Unix(),
GasLimit: st.GetGasLimit(),
}
vmach := vm.NewVM(txCache, params, caller.Address, nil)
gas := st.GetGasLimit()
ret, err := vmach.Call(caller, callee, code, data, 0, &gas)
if err != nil {
return nil, err
}
return &ctypes.ResultCall{Return: ret}, nil
}