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