319 lines
11 KiB
Go
319 lines
11 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 params
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import (
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"fmt"
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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)
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var (
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// MainnetChainConfig is the chain parameters to run a node on the main network.
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MainnetChainConfig = &ChainConfig{
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ChainId: MainNetChainID,
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HomesteadBlock: MainNetHomesteadBlock,
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DAOForkBlock: MainNetDAOForkBlock,
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DAOForkSupport: true,
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EIP150Block: MainNetHomesteadGasRepriceBlock,
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EIP150Hash: MainNetHomesteadGasRepriceHash,
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EIP155Block: MainNetSpuriousDragon,
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EIP158Block: MainNetSpuriousDragon,
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MetropolisBlock: MainNetMetropolisBlock,
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Ethash: new(EthashConfig),
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}
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// TestnetChainConfig contains the chain parameters to run a node on the Ropsten test network.
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TestnetChainConfig = &ChainConfig{
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ChainId: big.NewInt(3),
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HomesteadBlock: big.NewInt(0),
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DAOForkBlock: nil,
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DAOForkSupport: true,
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EIP150Block: big.NewInt(0),
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EIP150Hash: common.HexToHash("0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d"),
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EIP155Block: big.NewInt(10),
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EIP158Block: big.NewInt(10),
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MetropolisBlock: TestNetMetropolisBlock,
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Ethash: new(EthashConfig),
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}
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// RinkebyChainConfig contains the chain parameters to run a node on the Rinkeby test network.
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RinkebyChainConfig = &ChainConfig{
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ChainId: big.NewInt(4),
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HomesteadBlock: big.NewInt(1),
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DAOForkBlock: nil,
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DAOForkSupport: true,
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EIP150Block: big.NewInt(2),
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EIP150Hash: common.HexToHash("0x9b095b36c15eaf13044373aef8ee0bd3a382a5abb92e402afa44b8249c3a90e9"),
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EIP155Block: big.NewInt(3),
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EIP158Block: big.NewInt(3),
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MetropolisBlock: TestNetMetropolisBlock,
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Clique: &CliqueConfig{
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Period: 15,
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Epoch: 30000,
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},
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}
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// AllProtocolChanges contains every protocol change (EIPs)
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// introduced and accepted by the Ethereum core developers.
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//
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// This configuration is intentionally not using keyed fields.
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// This configuration must *always* have all forks enabled, which
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// means that all fields must be set at all times. This forces
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// anyone adding flags to the config to also have to set these
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// fields.
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AllProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), new(EthashConfig), nil}
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TestChainConfig = &ChainConfig{big.NewInt(1), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), nil, new(EthashConfig), nil}
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TestRules = TestChainConfig.Rules(new(big.Int))
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)
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// ChainConfig is the core config which determines the blockchain settings.
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//
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// ChainConfig is stored in the database on a per block basis. This means
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// that any network, identified by its genesis block, can have its own
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// set of configuration options.
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type ChainConfig struct {
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ChainId *big.Int `json:"chainId"` // Chain id identifies the current chain and is used for replay protection
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HomesteadBlock *big.Int `json:"homesteadBlock,omitempty"` // Homestead switch block (nil = no fork, 0 = already homestead)
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DAOForkBlock *big.Int `json:"daoForkBlock,omitempty"` // TheDAO hard-fork switch block (nil = no fork)
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DAOForkSupport bool `json:"daoForkSupport,omitempty"` // Whether the nodes supports or opposes the DAO hard-fork
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// EIP150 implements the Gas price changes (https://github.com/ethereum/EIPs/issues/150)
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EIP150Block *big.Int `json:"eip150Block,omitempty"` // EIP150 HF block (nil = no fork)
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EIP150Hash common.Hash `json:"eip150Hash,omitempty"` // EIP150 HF hash (fast sync aid)
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EIP155Block *big.Int `json:"eip155Block,omitempty"` // EIP155 HF block
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EIP158Block *big.Int `json:"eip158Block,omitempty"` // EIP158 HF block
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MetropolisBlock *big.Int `json:"metropolisBlock,omitempty"` // Metropolis switch block (nil = no fork, 0 = alraedy on homestead)
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// Various consensus engines
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Ethash *EthashConfig `json:"ethash,omitempty"`
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Clique *CliqueConfig `json:"clique,omitempty"`
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}
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// EthashConfig is the consensus engine configs for proof-of-work based sealing.
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type EthashConfig struct{}
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// String implements the stringer interface, returning the consensus engine details.
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func (c *EthashConfig) String() string {
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return "ethash"
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}
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// CliqueConfig is the consensus engine configs for proof-of-authority based sealing.
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type CliqueConfig struct {
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Period uint64 `json:"period"` // Number of seconds between blocks to enforce
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Epoch uint64 `json:"epoch"` // Epoch length to reset votes and checkpoint
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}
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// String implements the stringer interface, returning the consensus engine details.
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func (c *CliqueConfig) String() string {
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return "clique"
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}
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// String implements the fmt.Stringer interface.
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func (c *ChainConfig) String() string {
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var engine interface{}
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switch {
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case c.Ethash != nil:
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engine = c.Ethash
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case c.Clique != nil:
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engine = c.Clique
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default:
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engine = "unknown"
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}
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return fmt.Sprintf("{ChainID: %v Homestead: %v DAO: %v DAOSupport: %v EIP150: %v EIP155: %v EIP158: %v Metropolis: %v Engine: %v}",
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c.ChainId,
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c.HomesteadBlock,
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c.DAOForkBlock,
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c.DAOForkSupport,
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c.EIP150Block,
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c.EIP155Block,
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c.EIP158Block,
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c.MetropolisBlock,
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engine,
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)
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}
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// IsHomestead returns whether num is either equal to the homestead block or greater.
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func (c *ChainConfig) IsHomestead(num *big.Int) bool {
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return isForked(c.HomesteadBlock, num)
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}
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// IsDAO returns whether num is either equal to the DAO fork block or greater.
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func (c *ChainConfig) IsDAOFork(num *big.Int) bool {
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return isForked(c.DAOForkBlock, num)
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}
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func (c *ChainConfig) IsEIP150(num *big.Int) bool {
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return isForked(c.EIP150Block, num)
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}
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func (c *ChainConfig) IsEIP155(num *big.Int) bool {
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return isForked(c.EIP155Block, num)
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}
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func (c *ChainConfig) IsEIP158(num *big.Int) bool {
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return isForked(c.EIP158Block, num)
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}
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func (c *ChainConfig) IsMetropolis(num *big.Int) bool {
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return isForked(c.MetropolisBlock, num)
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}
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// GasTable returns the gas table corresponding to the current phase (homestead or homestead reprice).
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//
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// The returned GasTable's fields shouldn't, under any circumstances, be changed.
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func (c *ChainConfig) GasTable(num *big.Int) GasTable {
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if num == nil {
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return GasTableHomestead
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}
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switch {
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case c.IsEIP158(num):
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return GasTableEIP158
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case c.IsEIP150(num):
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return GasTableHomesteadGasRepriceFork
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default:
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return GasTableHomestead
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}
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}
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// CheckCompatible checks whether scheduled fork transitions have been imported
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// with a mismatching chain configuration.
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func (c *ChainConfig) CheckCompatible(newcfg *ChainConfig, height uint64) *ConfigCompatError {
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bhead := new(big.Int).SetUint64(height)
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// Iterate checkCompatible to find the lowest conflict.
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var lasterr *ConfigCompatError
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for {
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err := c.checkCompatible(newcfg, bhead)
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if err == nil || (lasterr != nil && err.RewindTo == lasterr.RewindTo) {
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break
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}
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lasterr = err
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bhead.SetUint64(err.RewindTo)
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}
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return lasterr
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}
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func (c *ChainConfig) checkCompatible(newcfg *ChainConfig, head *big.Int) *ConfigCompatError {
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if isForkIncompatible(c.HomesteadBlock, newcfg.HomesteadBlock, head) {
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return newCompatError("Homestead fork block", c.HomesteadBlock, newcfg.HomesteadBlock)
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}
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if isForkIncompatible(c.DAOForkBlock, newcfg.DAOForkBlock, head) {
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return newCompatError("DAO fork block", c.DAOForkBlock, newcfg.DAOForkBlock)
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}
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if c.IsDAOFork(head) && c.DAOForkSupport != newcfg.DAOForkSupport {
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return newCompatError("DAO fork support flag", c.DAOForkBlock, newcfg.DAOForkBlock)
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}
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if isForkIncompatible(c.EIP150Block, newcfg.EIP150Block, head) {
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return newCompatError("EIP150 fork block", c.EIP150Block, newcfg.EIP150Block)
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}
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if isForkIncompatible(c.EIP155Block, newcfg.EIP155Block, head) {
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return newCompatError("EIP155 fork block", c.EIP155Block, newcfg.EIP155Block)
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}
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if isForkIncompatible(c.EIP158Block, newcfg.EIP158Block, head) {
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return newCompatError("EIP158 fork block", c.EIP158Block, newcfg.EIP158Block)
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}
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if c.IsEIP158(head) && !configNumEqual(c.ChainId, newcfg.ChainId) {
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return newCompatError("EIP158 chain ID", c.EIP158Block, newcfg.EIP158Block)
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}
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if isForkIncompatible(c.MetropolisBlock, newcfg.MetropolisBlock, head) {
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return newCompatError("Metropolis fork block", c.MetropolisBlock, newcfg.MetropolisBlock)
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}
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return nil
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}
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// isForkIncompatible returns true if a fork scheduled at s1 cannot be rescheduled to
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// block s2 because head is already past the fork.
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func isForkIncompatible(s1, s2, head *big.Int) bool {
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return (isForked(s1, head) || isForked(s2, head)) && !configNumEqual(s1, s2)
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}
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// isForked returns whether a fork scheduled at block s is active at the given head block.
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func isForked(s, head *big.Int) bool {
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if s == nil || head == nil {
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return false
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}
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return s.Cmp(head) <= 0
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}
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func configNumEqual(x, y *big.Int) bool {
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if x == nil {
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return y == nil
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}
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if y == nil {
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return x == nil
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}
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return x.Cmp(y) == 0
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}
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// ConfigCompatError is raised if the locally-stored blockchain is initialised with a
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// ChainConfig that would alter the past.
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type ConfigCompatError struct {
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What string
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// block numbers of the stored and new configurations
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StoredConfig, NewConfig *big.Int
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// the block number to which the local chain must be rewound to correct the error
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RewindTo uint64
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}
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func newCompatError(what string, storedblock, newblock *big.Int) *ConfigCompatError {
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var rew *big.Int
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switch {
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case storedblock == nil:
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rew = newblock
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case newblock == nil || storedblock.Cmp(newblock) < 0:
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rew = storedblock
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default:
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rew = newblock
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}
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err := &ConfigCompatError{what, storedblock, newblock, 0}
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if rew != nil && rew.Sign() > 0 {
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err.RewindTo = rew.Uint64() - 1
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}
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return err
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}
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func (err *ConfigCompatError) Error() string {
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return fmt.Sprintf("mismatching %s in database (have %d, want %d, rewindto %d)", err.What, err.StoredConfig, err.NewConfig, err.RewindTo)
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}
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// Rules wraps ChainConfig and is merely syntatic sugar or can be used for functions
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// that do not have or require information about the block.
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//
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// Rules is a one time interface meaning that it shouldn't be used in between transition
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// phases.
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type Rules struct {
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ChainId *big.Int
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IsHomestead, IsEIP150, IsEIP155, IsEIP158 bool
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IsMetropolis bool
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}
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func (c *ChainConfig) Rules(num *big.Int) Rules {
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chainId := c.ChainId
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if chainId == nil {
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chainId = new(big.Int)
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}
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return Rules{ChainId: new(big.Int).Set(chainId), IsHomestead: c.IsHomestead(num), IsEIP150: c.IsEIP150(num), IsEIP155: c.IsEIP155(num), IsEIP158: c.IsEIP158(num), IsMetropolis: c.IsMetropolis(num)}
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}
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