1 files changed, 87 insertions, 0 deletions
diff --git a/core/vm/interface.go b/core/vm/interface.go
new file mode 100644
index 0000000..7e2d324
--- /dev/null
+++ b/core/vm/interface.go
@@ -0,0 +1,87 @@
+// 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)
+}