7a5b571c67
This implements a generic approach to enabling soft forks by allowing anyone to put in hashes of contracts that should not be interacted from. This will help "The DAO" in their endevour to stop any whithdrawals from any DAO contract by convincing the mining community to accept their code hash.
132 lines
4.2 KiB
Go
132 lines
4.2 KiB
Go
// Copyright 2015 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 runtime
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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"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/vm"
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)
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// Env is a basic runtime environment required for running the EVM.
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type Env struct {
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ruleSet vm.RuleSet
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depth int
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state *state.StateDB
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illegalHashes []common.Hash
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origin common.Address
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coinbase common.Address
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number *big.Int
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time *big.Int
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difficulty *big.Int
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gasLimit *big.Int
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logs []vm.StructLog
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getHashFn func(uint64) common.Hash
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evm *vm.EVM
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}
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// NewEnv returns a new vm.Environment
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func NewEnv(cfg *Config, state *state.StateDB) vm.Environment {
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env := &Env{
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ruleSet: cfg.RuleSet,
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illegalHashes: cfg.illegalHashes,
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state: state,
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origin: cfg.Origin,
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coinbase: cfg.Coinbase,
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number: cfg.BlockNumber,
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time: cfg.Time,
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difficulty: cfg.Difficulty,
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gasLimit: cfg.GasLimit,
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}
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env.evm = vm.New(env, vm.Config{
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Debug: cfg.Debug,
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EnableJit: !cfg.DisableJit,
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ForceJit: !cfg.DisableJit,
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Logger: vm.LogConfig{
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Collector: env,
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},
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})
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return env
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}
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func (self *Env) StructLogs() []vm.StructLog {
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return self.logs
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}
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func (self *Env) AddStructLog(log vm.StructLog) {
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self.logs = append(self.logs, log)
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}
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func (self *Env) MarkCodeHash(hash common.Hash) {}
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func (self *Env) RuleSet() vm.RuleSet { return self.ruleSet }
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func (self *Env) Vm() vm.Vm { return self.evm }
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func (self *Env) Origin() common.Address { return self.origin }
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func (self *Env) BlockNumber() *big.Int { return self.number }
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func (self *Env) Coinbase() common.Address { return self.coinbase }
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func (self *Env) Time() *big.Int { return self.time }
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func (self *Env) Difficulty() *big.Int { return self.difficulty }
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func (self *Env) Db() vm.Database { return self.state }
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func (self *Env) GasLimit() *big.Int { return self.gasLimit }
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func (self *Env) VmType() vm.Type { return vm.StdVmTy }
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func (self *Env) GetHash(n uint64) common.Hash {
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return self.getHashFn(n)
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}
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func (self *Env) AddLog(log *vm.Log) {
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self.state.AddLog(log)
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}
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func (self *Env) Depth() int { return self.depth }
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func (self *Env) SetDepth(i int) { self.depth = i }
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func (self *Env) CanTransfer(from common.Address, balance *big.Int) bool {
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return self.state.GetBalance(from).Cmp(balance) >= 0
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}
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func (self *Env) MakeSnapshot() vm.Database {
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return self.state.Copy()
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}
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func (self *Env) SetSnapshot(copy vm.Database) {
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self.state.Set(copy.(*state.StateDB))
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}
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func (self *Env) Transfer(from, to vm.Account, amount *big.Int) {
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core.Transfer(from, to, amount)
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}
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func (self *Env) Call(caller vm.ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
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return core.Call(self, caller, addr, data, gas, price, value)
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}
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func (self *Env) CallCode(caller vm.ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
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return core.CallCode(self, caller, addr, data, gas, price, value)
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}
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func (self *Env) DelegateCall(me vm.ContractRef, addr common.Address, data []byte, gas, price *big.Int) ([]byte, error) {
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return core.DelegateCall(self, me, addr, data, gas, price)
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}
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func (self *Env) Create(caller vm.ContractRef, data []byte, gas, price, value *big.Int) ([]byte, common.Address, error) {
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return core.Create(self, caller, data, gas, price, value)
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}
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