// Copyright 2016 The go-ethereum Authors // This file is part of the go-ethereum library. // // The go-ethereum library is free software: you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // The go-ethereum library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public License // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. package vm import ( "math/big" "github.com/ava-labs/coreth/core/types" "github.com/ava-labs/go-ethereum/common" ) // StateDB is an EVM database for full state querying. type StateDB interface { CreateAccount(common.Address) SubBalance(common.Address, *big.Int) AddBalance(common.Address, *big.Int) GetBalance(common.Address) *big.Int SubBalanceMultiCoin(common.Address, common.Hash, *big.Int) AddBalanceMultiCoin(common.Address, common.Hash, *big.Int) GetBalanceMultiCoin(common.Address, common.Hash) *big.Int EnableMultiCoin(common.Address) error IsMultiCoin(common.Address) bool GetNonce(common.Address) uint64 SetNonce(common.Address, uint64) GetCodeHash(common.Address) common.Hash GetCode(common.Address) []byte SetCode(common.Address, []byte) GetCodeSize(common.Address) int AddRefund(uint64) SubRefund(uint64) GetRefund() uint64 GetCommittedState(common.Address, common.Hash) common.Hash GetState(common.Address, common.Hash) common.Hash SetState(common.Address, common.Hash, common.Hash) error Suicide(common.Address) bool HasSuicided(common.Address) bool // Exist reports whether the given account exists in state. // Notably this should also return true for suicided accounts. Exist(common.Address) bool // Empty returns whether the given account is empty. Empty // is defined according to EIP161 (balance = nonce = code = 0). Empty(common.Address) bool RevertToSnapshot(int) Snapshot() int AddLog(*types.Log) AddPreimage(common.Hash, []byte) ForEachStorage(common.Address, func(common.Hash, common.Hash) bool) error } // CallContext provides a basic interface for the EVM calling conventions. The EVM // depends on this context being implemented for doing subcalls and initialising new EVM contracts. type CallContext interface { // Call another contract Call(env *EVM, me ContractRef, addr common.Address, data []byte, gas, value *big.Int) ([]byte, error) CallExpert(env *EVM, me ContractRef, addr common.Address, data []byte, gas, value *big.Int, coinID *common.Hash, value2 *big.Int) ([]byte, error) // Take another's contract code and execute within our own context CallCode(env *EVM, me ContractRef, addr common.Address, data []byte, gas, value *big.Int) ([]byte, error) // Same as CallCode except sender and value is propagated from parent to child scope DelegateCall(env *EVM, me ContractRef, addr common.Address, data []byte, gas *big.Int) ([]byte, error) // Create a new contract Create(env *EVM, me ContractRef, data []byte, gas, value *big.Int) ([]byte, common.Address, error) }