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+// 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)
+}