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3fc7c97827
Environment is now a struct (not an interface). This reduces a lot of tech-debt throughout the codebase where a virtual machine environment had to be implemented in order to test or run it. The new environment is suitable to be used en the json tests, core consensus and light client.
98 lines
3.4 KiB
Go
98 lines
3.4 KiB
Go
// Copyright 2014 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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)
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// Vm is the basic interface for an implementation of the EVM.
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type Vm interface {
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// Run should execute the given contract with the input given in in
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// and return the contract execution return bytes or an error if it
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// failed.
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Run(c *Contract, in []byte) ([]byte, error)
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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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GetAccount(common.Address) Account
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CreateAccount(common.Address) Account
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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(*Log)
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}
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// Account represents a contract or basic ethereum account.
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type Account interface {
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SubBalance(amount *big.Int)
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AddBalance(amount *big.Int)
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SetBalance(*big.Int)
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SetNonce(uint64)
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Balance() *big.Int
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Address() common.Address
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ReturnGas(*big.Int)
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SetCode(common.Hash, []byte)
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ForEachStorage(cb func(key, value common.Hash) bool)
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Value() *big.Int
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}
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// CallContext provides a basic interface for the EVM calling conventions. The EVM Environment
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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 *Environment, 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 *Environment, 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 *Environment, 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 *Environment, me ContractRef, data []byte, gas, value *big.Int) ([]byte, common.Address, error)
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}
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