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config.go
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// 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 params
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
)
// Genesis hashes to enforce below configs on.
var (
MainnetGenesisHash = common.HexToHash("0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3")
SepoliaGenesisHash = common.HexToHash("0x25a5cc106eea7138acab33231d7160d69cb777ee0c2c553fcddf5138993e6dd9")
RinkebyGenesisHash = common.HexToHash("0x6341fd3daf94b748c72ced5a5b26028f2474f5f00d824504e4fa37a75767e177")
GoerliGenesisHash = common.HexToHash("0xbf7e331f7f7c1dd2e05159666b3bf8bc7a8a3a9eb1d518969eab529dd9b88c1a")
)
func newUint64(val uint64) *uint64 { return &val }
var (
MainnetTerminalTotalDifficulty, _ = new(big.Int).SetString("58_750_000_000_000_000_000_000", 0)
// MainnetChainConfig is the chain parameters to run a node on the main network.
MainnetChainConfig = &ChainConfig{
ChainID: big.NewInt(1),
HomesteadBlock: big.NewInt(1_150_000),
DAOForkBlock: big.NewInt(1_920_000),
DAOForkSupport: true,
EIP150Block: big.NewInt(2_463_000),
EIP155Block: big.NewInt(2_675_000),
EIP158Block: big.NewInt(2_675_000),
ByzantiumBlock: big.NewInt(4_370_000),
ConstantinopleBlock: big.NewInt(7_280_000),
PetersburgBlock: big.NewInt(7_280_000),
IstanbulBlock: big.NewInt(9_069_000),
MuirGlacierBlock: big.NewInt(9_200_000),
BerlinBlock: big.NewInt(12_244_000),
LondonBlock: big.NewInt(12_965_000),
ArrowGlacierBlock: big.NewInt(13_773_000),
GrayGlacierBlock: big.NewInt(15_050_000),
TerminalTotalDifficulty: MainnetTerminalTotalDifficulty, // 58_750_000_000_000_000_000_000
TerminalTotalDifficultyPassed: true,
ShanghaiTime: newUint64(1681338455),
Ethash: new(EthashConfig),
}
// SepoliaChainConfig contains the chain parameters to run a node on the Sepolia test network.
SepoliaChainConfig = &ChainConfig{
ChainID: big.NewInt(11155111),
HomesteadBlock: big.NewInt(0),
DAOForkBlock: nil,
DAOForkSupport: true,
EIP150Block: big.NewInt(0),
EIP155Block: big.NewInt(0),
EIP158Block: big.NewInt(0),
ByzantiumBlock: big.NewInt(0),
ConstantinopleBlock: big.NewInt(0),
PetersburgBlock: big.NewInt(0),
IstanbulBlock: big.NewInt(0),
MuirGlacierBlock: big.NewInt(0),
BerlinBlock: big.NewInt(0),
LondonBlock: big.NewInt(0),
TerminalTotalDifficulty: big.NewInt(17_000_000_000_000_000),
TerminalTotalDifficultyPassed: true,
MergeNetsplitBlock: big.NewInt(1735371),
ShanghaiTime: newUint64(1677557088),
Ethash: new(EthashConfig),
}
// RinkebyChainConfig contains the chain parameters to run a node on the Rinkeby test network.
RinkebyChainConfig = &ChainConfig{
ChainID: big.NewInt(4),
HomesteadBlock: big.NewInt(1),
DAOForkBlock: nil,
DAOForkSupport: true,
EIP150Block: big.NewInt(2),
EIP155Block: big.NewInt(3),
EIP158Block: big.NewInt(3),
ByzantiumBlock: big.NewInt(1_035_301),
ConstantinopleBlock: big.NewInt(3_660_663),
PetersburgBlock: big.NewInt(4_321_234),
IstanbulBlock: big.NewInt(5_435_345),
MuirGlacierBlock: nil,
BerlinBlock: big.NewInt(8_290_928),
LondonBlock: big.NewInt(8_897_988),
ArrowGlacierBlock: nil,
Clique: &CliqueConfig{
Period: 15,
Epoch: 30000,
},
}
// GoerliChainConfig contains the chain parameters to run a node on the Görli test network.
GoerliChainConfig = &ChainConfig{
ChainID: big.NewInt(5),
HomesteadBlock: big.NewInt(0),
DAOForkBlock: nil,
DAOForkSupport: true,
EIP150Block: big.NewInt(0),
EIP155Block: big.NewInt(0),
EIP158Block: big.NewInt(0),
ByzantiumBlock: big.NewInt(0),
ConstantinopleBlock: big.NewInt(0),
PetersburgBlock: big.NewInt(0),
IstanbulBlock: big.NewInt(1_561_651),
MuirGlacierBlock: nil,
BerlinBlock: big.NewInt(4_460_644),
LondonBlock: big.NewInt(5_062_605),
ArrowGlacierBlock: nil,
TerminalTotalDifficulty: big.NewInt(10_790_000),
TerminalTotalDifficultyPassed: true,
ShanghaiTime: newUint64(1678832736),
Clique: &CliqueConfig{
Period: 15,
Epoch: 30000,
},
}
// AllEthashProtocolChanges contains every protocol change (EIPs) introduced
// and accepted by the Ethereum core developers into the Ethash consensus.
AllEthashProtocolChanges = &ChainConfig{
ChainID: big.NewInt(1337),
HomesteadBlock: big.NewInt(0),
DAOForkBlock: nil,
DAOForkSupport: false,
EIP150Block: big.NewInt(0),
EIP155Block: big.NewInt(0),
EIP158Block: big.NewInt(0),
ByzantiumBlock: big.NewInt(0),
ConstantinopleBlock: big.NewInt(0),
PetersburgBlock: big.NewInt(0),
IstanbulBlock: big.NewInt(0),
MuirGlacierBlock: big.NewInt(0),
BerlinBlock: big.NewInt(0),
LondonBlock: big.NewInt(0),
ArrowGlacierBlock: big.NewInt(0),
GrayGlacierBlock: big.NewInt(0),
MergeNetsplitBlock: nil,
ShanghaiTime: nil,
CancunTime: nil,
PragueTime: nil,
TerminalTotalDifficulty: nil,
TerminalTotalDifficultyPassed: true,
Ethash: new(EthashConfig),
Clique: nil,
}
// AllCliqueProtocolChanges contains every protocol change (EIPs) introduced
// and accepted by the Ethereum core developers into the Clique consensus.
AllCliqueProtocolChanges = &ChainConfig{
ChainID: big.NewInt(1337),
HomesteadBlock: big.NewInt(0),
DAOForkBlock: nil,
DAOForkSupport: false,
EIP150Block: big.NewInt(0),
EIP155Block: big.NewInt(0),
EIP158Block: big.NewInt(0),
ByzantiumBlock: big.NewInt(0),
ConstantinopleBlock: big.NewInt(0),
PetersburgBlock: big.NewInt(0),
IstanbulBlock: big.NewInt(0),
MuirGlacierBlock: big.NewInt(0),
BerlinBlock: big.NewInt(0),
LondonBlock: big.NewInt(0),
ArrowGlacierBlock: nil,
GrayGlacierBlock: nil,
MergeNetsplitBlock: nil,
ShanghaiTime: nil,
CancunTime: nil,
PragueTime: nil,
TerminalTotalDifficulty: nil,
TerminalTotalDifficultyPassed: false,
Ethash: nil,
Clique: &CliqueConfig{Period: 0, Epoch: 30000},
}
// TestChainConfig contains every protocol change (EIPs) introduced
// and accepted by the Ethereum core developers for testing proposes.
TestChainConfig = &ChainConfig{
ChainID: big.NewInt(1),
HomesteadBlock: big.NewInt(0),
DAOForkBlock: nil,
DAOForkSupport: false,
EIP150Block: big.NewInt(0),
EIP155Block: big.NewInt(0),
EIP158Block: big.NewInt(0),
ByzantiumBlock: big.NewInt(0),
ConstantinopleBlock: big.NewInt(0),
PetersburgBlock: big.NewInt(0),
IstanbulBlock: big.NewInt(0),
MuirGlacierBlock: big.NewInt(0),
BerlinBlock: big.NewInt(0),
LondonBlock: big.NewInt(0),
ArrowGlacierBlock: big.NewInt(0),
GrayGlacierBlock: big.NewInt(0),
MergeNetsplitBlock: nil,
ShanghaiTime: nil,
CancunTime: nil,
PragueTime: nil,
TerminalTotalDifficulty: nil,
TerminalTotalDifficultyPassed: false,
Ethash: new(EthashConfig),
Clique: nil,
}
// NonActivatedConfig defines the chain configuration without activating
// any protocol change (EIPs).
NonActivatedConfig = &ChainConfig{
ChainID: big.NewInt(1),
HomesteadBlock: nil,
DAOForkBlock: nil,
DAOForkSupport: false,
EIP150Block: nil,
EIP155Block: nil,
EIP158Block: nil,
ByzantiumBlock: nil,
ConstantinopleBlock: nil,
PetersburgBlock: nil,
IstanbulBlock: nil,
MuirGlacierBlock: nil,
BerlinBlock: nil,
LondonBlock: nil,
ArrowGlacierBlock: nil,
GrayGlacierBlock: nil,
MergeNetsplitBlock: nil,
ShanghaiTime: nil,
CancunTime: nil,
PragueTime: nil,
TerminalTotalDifficulty: nil,
TerminalTotalDifficultyPassed: false,
Ethash: new(EthashConfig),
Clique: nil,
}
TestRules = TestChainConfig.Rules(new(big.Int), false, 0)
)
// NetworkNames are user friendly names to use in the chain spec banner.
var NetworkNames = map[string]string{
MainnetChainConfig.ChainID.String(): "mainnet",
RinkebyChainConfig.ChainID.String(): "rinkeby",
GoerliChainConfig.ChainID.String(): "goerli",
SepoliaChainConfig.ChainID.String(): "sepolia",
}
// ChainConfig is the core config which determines the blockchain settings.
//
// ChainConfig is stored in the database on a per block basis. This means
// that any network, identified by its genesis block, can have its own
// set of configuration options.
type ChainConfig struct {
ChainID *big.Int `json:"chainId"` // chainId identifies the current chain and is used for replay protection
HomesteadBlock *big.Int `json:"homesteadBlock,omitempty"` // Homestead switch block (nil = no fork, 0 = already homestead)
DAOForkBlock *big.Int `json:"daoForkBlock,omitempty"` // TheDAO hard-fork switch block (nil = no fork)
DAOForkSupport bool `json:"daoForkSupport,omitempty"` // Whether the nodes supports or opposes the DAO hard-fork
// EIP150 implements the Gas price changes (https://github.com/ethereum/EIPs/issues/150)
EIP150Block *big.Int `json:"eip150Block,omitempty"` // EIP150 HF block (nil = no fork)
EIP155Block *big.Int `json:"eip155Block,omitempty"` // EIP155 HF block
EIP158Block *big.Int `json:"eip158Block,omitempty"` // EIP158 HF block
ByzantiumBlock *big.Int `json:"byzantiumBlock,omitempty"` // Byzantium switch block (nil = no fork, 0 = already on byzantium)
ConstantinopleBlock *big.Int `json:"constantinopleBlock,omitempty"` // Constantinople switch block (nil = no fork, 0 = already activated)
PetersburgBlock *big.Int `json:"petersburgBlock,omitempty"` // Petersburg switch block (nil = same as Constantinople)
IstanbulBlock *big.Int `json:"istanbulBlock,omitempty"` // Istanbul switch block (nil = no fork, 0 = already on istanbul)
MuirGlacierBlock *big.Int `json:"muirGlacierBlock,omitempty"` // Eip-2384 (bomb delay) switch block (nil = no fork, 0 = already activated)
BerlinBlock *big.Int `json:"berlinBlock,omitempty"` // Berlin switch block (nil = no fork, 0 = already on berlin)
LondonBlock *big.Int `json:"londonBlock,omitempty"` // London switch block (nil = no fork, 0 = already on london)
ArrowGlacierBlock *big.Int `json:"arrowGlacierBlock,omitempty"` // Eip-4345 (bomb delay) switch block (nil = no fork, 0 = already activated)
GrayGlacierBlock *big.Int `json:"grayGlacierBlock,omitempty"` // Eip-5133 (bomb delay) switch block (nil = no fork, 0 = already activated)
MergeNetsplitBlock *big.Int `json:"mergeNetsplitBlock,omitempty"` // Virtual fork after The Merge to use as a network splitter
// Fork scheduling was switched from blocks to timestamps here
ShanghaiTime *uint64 `json:"shanghaiTime,omitempty"` // Shanghai switch time (nil = no fork, 0 = already on shanghai)
CancunTime *uint64 `json:"cancunTime,omitempty"` // Cancun switch time (nil = no fork, 0 = already on cancun)
PragueTime *uint64 `json:"pragueTime,omitempty"` // Prague switch time (nil = no fork, 0 = already on prague)
// TerminalTotalDifficulty is the amount of total difficulty reached by
// the network that triggers the consensus upgrade.
TerminalTotalDifficulty *big.Int `json:"terminalTotalDifficulty,omitempty"`
// TerminalTotalDifficultyPassed is a flag specifying that the network already
// passed the terminal total difficulty. Its purpose is to disable legacy sync
// even without having seen the TTD locally (safer long term).
TerminalTotalDifficultyPassed bool `json:"terminalTotalDifficultyPassed,omitempty"`
// Various consensus engines
Ethash *EthashConfig `json:"ethash,omitempty"`
Clique *CliqueConfig `json:"clique,omitempty"`
}
// EthashConfig is the consensus engine configs for proof-of-work based sealing.
type EthashConfig struct{}
// String implements the stringer interface, returning the consensus engine details.
func (c *EthashConfig) String() string {
return "ethash"
}
// CliqueConfig is the consensus engine configs for proof-of-authority based sealing.
type CliqueConfig struct {
Period uint64 `json:"period"` // Number of seconds between blocks to enforce
Epoch uint64 `json:"epoch"` // Epoch length to reset votes and checkpoint
}
// String implements the stringer interface, returning the consensus engine details.
func (c *CliqueConfig) String() string {
return "clique"
}
// Description returns a human-readable description of ChainConfig.
func (c *ChainConfig) Description() string {
var banner string
// Create some basinc network config output
network := NetworkNames[c.ChainID.String()]
if network == "" {
network = "unknown"
}
banner += fmt.Sprintf("Chain ID: %v (%s)\n", c.ChainID, network)
switch {
case c.Ethash != nil:
if c.TerminalTotalDifficulty == nil {
banner += "Consensus: Ethash (proof-of-work)\n"
} else if !c.TerminalTotalDifficultyPassed {
banner += "Consensus: Beacon (proof-of-stake), merging from Ethash (proof-of-work)\n"
} else {
banner += "Consensus: Beacon (proof-of-stake), merged from Ethash (proof-of-work)\n"
}
case c.Clique != nil:
if c.TerminalTotalDifficulty == nil {
banner += "Consensus: Clique (proof-of-authority)\n"
} else if !c.TerminalTotalDifficultyPassed {
banner += "Consensus: Beacon (proof-of-stake), merging from Clique (proof-of-authority)\n"
} else {
banner += "Consensus: Beacon (proof-of-stake), merged from Clique (proof-of-authority)\n"
}
default:
banner += "Consensus: unknown\n"
}
banner += "\n"
// Create a list of forks with a short description of them. Forks that only
// makes sense for mainnet should be optional at printing to avoid bloating
// the output for testnets and private networks.
banner += "Pre-Merge hard forks (block based):\n"
banner += fmt.Sprintf(" - Homestead: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/homestead.md)\n", c.HomesteadBlock)
if c.DAOForkBlock != nil {
banner += fmt.Sprintf(" - DAO Fork: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/dao-fork.md)\n", c.DAOForkBlock)
}
banner += fmt.Sprintf(" - Tangerine Whistle (EIP 150): #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/tangerine-whistle.md)\n", c.EIP150Block)
banner += fmt.Sprintf(" - Spurious Dragon/1 (EIP 155): #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/spurious-dragon.md)\n", c.EIP155Block)
banner += fmt.Sprintf(" - Spurious Dragon/2 (EIP 158): #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/spurious-dragon.md)\n", c.EIP155Block)
banner += fmt.Sprintf(" - Byzantium: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/byzantium.md)\n", c.ByzantiumBlock)
banner += fmt.Sprintf(" - Constantinople: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/constantinople.md)\n", c.ConstantinopleBlock)
banner += fmt.Sprintf(" - Petersburg: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/petersburg.md)\n", c.PetersburgBlock)
banner += fmt.Sprintf(" - Istanbul: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/istanbul.md)\n", c.IstanbulBlock)
if c.MuirGlacierBlock != nil {
banner += fmt.Sprintf(" - Muir Glacier: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/muir-glacier.md)\n", c.MuirGlacierBlock)
}
banner += fmt.Sprintf(" - Berlin: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/berlin.md)\n", c.BerlinBlock)
banner += fmt.Sprintf(" - London: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/london.md)\n", c.LondonBlock)
if c.ArrowGlacierBlock != nil {
banner += fmt.Sprintf(" - Arrow Glacier: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/arrow-glacier.md)\n", c.ArrowGlacierBlock)
}
if c.GrayGlacierBlock != nil {
banner += fmt.Sprintf(" - Gray Glacier: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/gray-glacier.md)\n", c.GrayGlacierBlock)
}
banner += "\n"
// Add a special section for the merge as it's non-obvious
if c.TerminalTotalDifficulty == nil {
banner += "The Merge is not yet available for this network!\n"
banner += " - Hard-fork specification: https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/paris.md\n"
} else {
banner += "Merge configured:\n"
banner += " - Hard-fork specification: https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/paris.md\n"
banner += fmt.Sprintf(" - Network known to be merged: %v\n", c.TerminalTotalDifficultyPassed)
banner += fmt.Sprintf(" - Total terminal difficulty: %v\n", c.TerminalTotalDifficulty)
if c.MergeNetsplitBlock != nil {
banner += fmt.Sprintf(" - Merge netsplit block: #%-8v\n", c.MergeNetsplitBlock)
}
}
banner += "\n"
// Create a list of forks post-merge
banner += "Post-Merge hard forks (timestamp based):\n"
if c.ShanghaiTime != nil {
banner += fmt.Sprintf(" - Shanghai: @%-10v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/shanghai.md)\n", *c.ShanghaiTime)
}
if c.CancunTime != nil {
banner += fmt.Sprintf(" - Cancun: @%-10v\n", *c.CancunTime)
}
if c.PragueTime != nil {
banner += fmt.Sprintf(" - Prague: @%-10v\n", *c.PragueTime)
}
return banner
}
// IsHomestead returns whether num is either equal to the homestead block or greater.
func (c *ChainConfig) IsHomestead(num *big.Int) bool {
return isBlockForked(c.HomesteadBlock, num)
}
// IsDAOFork returns whether num is either equal to the DAO fork block or greater.
func (c *ChainConfig) IsDAOFork(num *big.Int) bool {
return isBlockForked(c.DAOForkBlock, num)
}
// IsEIP150 returns whether num is either equal to the EIP150 fork block or greater.
func (c *ChainConfig) IsEIP150(num *big.Int) bool {
return isBlockForked(c.EIP150Block, num)
}
// IsEIP155 returns whether num is either equal to the EIP155 fork block or greater.
func (c *ChainConfig) IsEIP155(num *big.Int) bool {
return isBlockForked(c.EIP155Block, num)
}
// IsEIP158 returns whether num is either equal to the EIP158 fork block or greater.
func (c *ChainConfig) IsEIP158(num *big.Int) bool {
return isBlockForked(c.EIP158Block, num)
}
// IsByzantium returns whether num is either equal to the Byzantium fork block or greater.
func (c *ChainConfig) IsByzantium(num *big.Int) bool {
return isBlockForked(c.ByzantiumBlock, num)
}
// IsConstantinople returns whether num is either equal to the Constantinople fork block or greater.
func (c *ChainConfig) IsConstantinople(num *big.Int) bool {
return isBlockForked(c.ConstantinopleBlock, num)
}
// IsMuirGlacier returns whether num is either equal to the Muir Glacier (EIP-2384) fork block or greater.
func (c *ChainConfig) IsMuirGlacier(num *big.Int) bool {
return isBlockForked(c.MuirGlacierBlock, num)
}
// IsPetersburg returns whether num is either
// - equal to or greater than the PetersburgBlock fork block,
// - OR is nil, and Constantinople is active
func (c *ChainConfig) IsPetersburg(num *big.Int) bool {
return isBlockForked(c.PetersburgBlock, num) || c.PetersburgBlock == nil && isBlockForked(c.ConstantinopleBlock, num)
}
// IsIstanbul returns whether num is either equal to the Istanbul fork block or greater.
func (c *ChainConfig) IsIstanbul(num *big.Int) bool {
return isBlockForked(c.IstanbulBlock, num)
}
// IsBerlin returns whether num is either equal to the Berlin fork block or greater.
func (c *ChainConfig) IsBerlin(num *big.Int) bool {
return isBlockForked(c.BerlinBlock, num)
}
// IsLondon returns whether num is either equal to the London fork block or greater.
func (c *ChainConfig) IsLondon(num *big.Int) bool {
return isBlockForked(c.LondonBlock, num)
}
// IsArrowGlacier returns whether num is either equal to the Arrow Glacier (EIP-4345) fork block or greater.
func (c *ChainConfig) IsArrowGlacier(num *big.Int) bool {
return isBlockForked(c.ArrowGlacierBlock, num)
}
// IsGrayGlacier returns whether num is either equal to the Gray Glacier (EIP-5133) fork block or greater.
func (c *ChainConfig) IsGrayGlacier(num *big.Int) bool {
return isBlockForked(c.GrayGlacierBlock, num)
}
// IsTerminalPoWBlock returns whether the given block is the last block of PoW stage.
func (c *ChainConfig) IsTerminalPoWBlock(parentTotalDiff *big.Int, totalDiff *big.Int) bool {
if c.TerminalTotalDifficulty == nil {
return false
}
return parentTotalDiff.Cmp(c.TerminalTotalDifficulty) < 0 && totalDiff.Cmp(c.TerminalTotalDifficulty) >= 0
}
// IsShanghai returns whether time is either equal to the Shanghai fork time or greater.
func (c *ChainConfig) IsShanghai(time uint64) bool {
return isTimestampForked(c.ShanghaiTime, time)
}
// IsCancun returns whether num is either equal to the Cancun fork time or greater.
func (c *ChainConfig) IsCancun(time uint64) bool {
return isTimestampForked(c.CancunTime, time)
}
// IsPrague returns whether num is either equal to the Prague fork time or greater.
func (c *ChainConfig) IsPrague(time uint64) bool {
return isTimestampForked(c.PragueTime, time)
}
// CheckCompatible checks whether scheduled fork transitions have been imported
// with a mismatching chain configuration.
func (c *ChainConfig) CheckCompatible(newcfg *ChainConfig, height uint64, time uint64) *ConfigCompatError {
var (
bhead = new(big.Int).SetUint64(height)
btime = time
)
// Iterate checkCompatible to find the lowest conflict.
var lasterr *ConfigCompatError
for {
err := c.checkCompatible(newcfg, bhead, btime)
if err == nil || (lasterr != nil && err.RewindToBlock == lasterr.RewindToBlock && err.RewindToTime == lasterr.RewindToTime) {
break
}
lasterr = err
if err.RewindToTime > 0 {
btime = err.RewindToTime
} else {
bhead.SetUint64(err.RewindToBlock)
}
}
return lasterr
}
// CheckConfigForkOrder checks that we don't "skip" any forks, geth isn't pluggable enough
// to guarantee that forks can be implemented in a different order than on official networks
func (c *ChainConfig) CheckConfigForkOrder() error {
type fork struct {
name string
block *big.Int // forks up to - and including the merge - were defined with block numbers
timestamp *uint64 // forks after the merge are scheduled using timestamps
optional bool // if true, the fork may be nil and next fork is still allowed
}
var lastFork fork
for _, cur := range []fork{
{name: "homesteadBlock", block: c.HomesteadBlock},
{name: "daoForkBlock", block: c.DAOForkBlock, optional: true},
{name: "eip150Block", block: c.EIP150Block},
{name: "eip155Block", block: c.EIP155Block},
{name: "eip158Block", block: c.EIP158Block},
{name: "byzantiumBlock", block: c.ByzantiumBlock},
{name: "constantinopleBlock", block: c.ConstantinopleBlock},
{name: "petersburgBlock", block: c.PetersburgBlock},
{name: "istanbulBlock", block: c.IstanbulBlock},
{name: "muirGlacierBlock", block: c.MuirGlacierBlock, optional: true},
{name: "berlinBlock", block: c.BerlinBlock},
{name: "londonBlock", block: c.LondonBlock},
{name: "arrowGlacierBlock", block: c.ArrowGlacierBlock, optional: true},
{name: "grayGlacierBlock", block: c.GrayGlacierBlock, optional: true},
{name: "mergeNetsplitBlock", block: c.MergeNetsplitBlock, optional: true},
{name: "shanghaiTime", timestamp: c.ShanghaiTime},
{name: "cancunTime", timestamp: c.CancunTime, optional: true},
{name: "pragueTime", timestamp: c.PragueTime, optional: true},
} {
if lastFork.name != "" {
switch {
// Non-optional forks must all be present in the chain config up to the last defined fork
case lastFork.block == nil && lastFork.timestamp == nil && (cur.block != nil || cur.timestamp != nil):
if cur.block != nil {
return fmt.Errorf("unsupported fork ordering: %v not enabled, but %v enabled at block %v",
lastFork.name, cur.name, cur.block)
} else {
return fmt.Errorf("unsupported fork ordering: %v not enabled, but %v enabled at timestamp %v",
lastFork.name, cur.name, cur.timestamp)
}
// Fork (whether defined by block or timestamp) must follow the fork definition sequence
case (lastFork.block != nil && cur.block != nil) || (lastFork.timestamp != nil && cur.timestamp != nil):
if lastFork.block != nil && lastFork.block.Cmp(cur.block) > 0 {
return fmt.Errorf("unsupported fork ordering: %v enabled at block %v, but %v enabled at block %v",
lastFork.name, lastFork.block, cur.name, cur.block)
} else if lastFork.timestamp != nil && *lastFork.timestamp > *cur.timestamp {
return fmt.Errorf("unsupported fork ordering: %v enabled at timestamp %v, but %v enabled at timestamp %v",
lastFork.name, lastFork.timestamp, cur.name, cur.timestamp)
}
// Timestamp based forks can follow block based ones, but not the other way around
if lastFork.timestamp != nil && cur.block != nil {
return fmt.Errorf("unsupported fork ordering: %v used timestamp ordering, but %v reverted to block ordering",
lastFork.name, cur.name)
}
}
}
// If it was optional and not set, then ignore it
if !cur.optional || (cur.block != nil || cur.timestamp != nil) {
lastFork = cur
}
}
return nil
}
func (c *ChainConfig) checkCompatible(newcfg *ChainConfig, headNumber *big.Int, headTimestamp uint64) *ConfigCompatError {
if isForkBlockIncompatible(c.HomesteadBlock, newcfg.HomesteadBlock, headNumber) {
return newBlockCompatError("Homestead fork block", c.HomesteadBlock, newcfg.HomesteadBlock)
}
if isForkBlockIncompatible(c.DAOForkBlock, newcfg.DAOForkBlock, headNumber) {
return newBlockCompatError("DAO fork block", c.DAOForkBlock, newcfg.DAOForkBlock)
}
if c.IsDAOFork(headNumber) && c.DAOForkSupport != newcfg.DAOForkSupport {
return newBlockCompatError("DAO fork support flag", c.DAOForkBlock, newcfg.DAOForkBlock)
}
if isForkBlockIncompatible(c.EIP150Block, newcfg.EIP150Block, headNumber) {
return newBlockCompatError("EIP150 fork block", c.EIP150Block, newcfg.EIP150Block)
}
if isForkBlockIncompatible(c.EIP155Block, newcfg.EIP155Block, headNumber) {
return newBlockCompatError("EIP155 fork block", c.EIP155Block, newcfg.EIP155Block)
}
if isForkBlockIncompatible(c.EIP158Block, newcfg.EIP158Block, headNumber) {
return newBlockCompatError("EIP158 fork block", c.EIP158Block, newcfg.EIP158Block)
}
if c.IsEIP158(headNumber) && !configBlockEqual(c.ChainID, newcfg.ChainID) {
return newBlockCompatError("EIP158 chain ID", c.EIP158Block, newcfg.EIP158Block)
}
if isForkBlockIncompatible(c.ByzantiumBlock, newcfg.ByzantiumBlock, headNumber) {
return newBlockCompatError("Byzantium fork block", c.ByzantiumBlock, newcfg.ByzantiumBlock)
}
if isForkBlockIncompatible(c.ConstantinopleBlock, newcfg.ConstantinopleBlock, headNumber) {
return newBlockCompatError("Constantinople fork block", c.ConstantinopleBlock, newcfg.ConstantinopleBlock)
}
if isForkBlockIncompatible(c.PetersburgBlock, newcfg.PetersburgBlock, headNumber) {
// the only case where we allow Petersburg to be set in the past is if it is equal to Constantinople
// mainly to satisfy fork ordering requirements which state that Petersburg fork be set if Constantinople fork is set
if isForkBlockIncompatible(c.ConstantinopleBlock, newcfg.PetersburgBlock, headNumber) {
return newBlockCompatError("Petersburg fork block", c.PetersburgBlock, newcfg.PetersburgBlock)
}
}
if isForkBlockIncompatible(c.IstanbulBlock, newcfg.IstanbulBlock, headNumber) {
return newBlockCompatError("Istanbul fork block", c.IstanbulBlock, newcfg.IstanbulBlock)
}
if isForkBlockIncompatible(c.MuirGlacierBlock, newcfg.MuirGlacierBlock, headNumber) {
return newBlockCompatError("Muir Glacier fork block", c.MuirGlacierBlock, newcfg.MuirGlacierBlock)
}
if isForkBlockIncompatible(c.BerlinBlock, newcfg.BerlinBlock, headNumber) {
return newBlockCompatError("Berlin fork block", c.BerlinBlock, newcfg.BerlinBlock)
}
if isForkBlockIncompatible(c.LondonBlock, newcfg.LondonBlock, headNumber) {
return newBlockCompatError("London fork block", c.LondonBlock, newcfg.LondonBlock)
}
if isForkBlockIncompatible(c.ArrowGlacierBlock, newcfg.ArrowGlacierBlock, headNumber) {
return newBlockCompatError("Arrow Glacier fork block", c.ArrowGlacierBlock, newcfg.ArrowGlacierBlock)
}
if isForkBlockIncompatible(c.GrayGlacierBlock, newcfg.GrayGlacierBlock, headNumber) {
return newBlockCompatError("Gray Glacier fork block", c.GrayGlacierBlock, newcfg.GrayGlacierBlock)
}
if isForkBlockIncompatible(c.MergeNetsplitBlock, newcfg.MergeNetsplitBlock, headNumber) {
return newBlockCompatError("Merge netsplit fork block", c.MergeNetsplitBlock, newcfg.MergeNetsplitBlock)
}
if isForkTimestampIncompatible(c.ShanghaiTime, newcfg.ShanghaiTime, headTimestamp) {
return newTimestampCompatError("Shanghai fork timestamp", c.ShanghaiTime, newcfg.ShanghaiTime)
}
if isForkTimestampIncompatible(c.CancunTime, newcfg.CancunTime, headTimestamp) {
return newTimestampCompatError("Cancun fork timestamp", c.CancunTime, newcfg.CancunTime)
}
if isForkTimestampIncompatible(c.PragueTime, newcfg.PragueTime, headTimestamp) {
return newTimestampCompatError("Prague fork timestamp", c.PragueTime, newcfg.PragueTime)
}
return nil
}
// BaseFeeChangeDenominator bounds the amount the base fee can change between blocks.
func (c *ChainConfig) BaseFeeChangeDenominator() uint64 {
return DefaultBaseFeeChangeDenominator
}
// ElasticityMultiplier bounds the maximum gas limit an EIP-1559 block may have.
func (c *ChainConfig) ElasticityMultiplier() uint64 {
return DefaultElasticityMultiplier
}
// isForkBlockIncompatible returns true if a fork scheduled at block s1 cannot be
// rescheduled to block s2 because head is already past the fork.
func isForkBlockIncompatible(s1, s2, head *big.Int) bool {
return (isBlockForked(s1, head) || isBlockForked(s2, head)) && !configBlockEqual(s1, s2)
}
// isBlockForked returns whether a fork scheduled at block s is active at the
// given head block. Whilst this method is the same as isTimestampForked, they
// are explicitly separate for clearer reading.
func isBlockForked(s, head *big.Int) bool {
if s == nil || head == nil {
return false
}
return s.Cmp(head) <= 0
}
func configBlockEqual(x, y *big.Int) bool {
if x == nil {
return y == nil
}
if y == nil {
return x == nil
}
return x.Cmp(y) == 0
}
// isForkTimestampIncompatible returns true if a fork scheduled at timestamp s1
// cannot be rescheduled to timestamp s2 because head is already past the fork.
func isForkTimestampIncompatible(s1, s2 *uint64, head uint64) bool {
return (isTimestampForked(s1, head) || isTimestampForked(s2, head)) && !configTimestampEqual(s1, s2)
}
// isTimestampForked returns whether a fork scheduled at timestamp s is active
// at the given head timestamp. Whilst this method is the same as isBlockForked,
// they are explicitly separate for clearer reading.
func isTimestampForked(s *uint64, head uint64) bool {
if s == nil {
return false
}
return *s <= head
}
func configTimestampEqual(x, y *uint64) bool {
if x == nil {
return y == nil
}
if y == nil {
return x == nil
}
return *x == *y
}
// ConfigCompatError is raised if the locally-stored blockchain is initialised with a
// ChainConfig that would alter the past.
type ConfigCompatError struct {
What string
// block numbers of the stored and new configurations if block based forking
StoredBlock, NewBlock *big.Int
// timestamps of the stored and new configurations if time based forking
StoredTime, NewTime *uint64
// the block number to which the local chain must be rewound to correct the error
RewindToBlock uint64
// the timestamp to which the local chain must be rewound to correct the error
RewindToTime uint64
}
func newBlockCompatError(what string, storedblock, newblock *big.Int) *ConfigCompatError {
var rew *big.Int
switch {
case storedblock == nil:
rew = newblock
case newblock == nil || storedblock.Cmp(newblock) < 0:
rew = storedblock
default:
rew = newblock
}
err := &ConfigCompatError{
What: what,
StoredBlock: storedblock,
NewBlock: newblock,
RewindToBlock: 0,
}
if rew != nil && rew.Sign() > 0 {
err.RewindToBlock = rew.Uint64() - 1
}
return err
}
func newTimestampCompatError(what string, storedtime, newtime *uint64) *ConfigCompatError {
var rew *uint64
switch {
case storedtime == nil:
rew = newtime
case newtime == nil || *storedtime < *newtime:
rew = storedtime
default:
rew = newtime
}
err := &ConfigCompatError{
What: what,
StoredTime: storedtime,
NewTime: newtime,
RewindToTime: 0,
}
if rew != nil {
err.RewindToTime = *rew - 1
}
return err
}
func (err *ConfigCompatError) Error() string {
if err.StoredBlock != nil {
return fmt.Sprintf("mismatching %s in database (have block %d, want block %d, rewindto block %d)", err.What, err.StoredBlock, err.NewBlock, err.RewindToBlock)
}
return fmt.Sprintf("mismatching %s in database (have timestamp %d, want timestamp %d, rewindto timestamp %d)", err.What, err.StoredTime, err.NewTime, err.RewindToTime)
}
// Rules wraps ChainConfig and is merely syntactic sugar or can be used for functions
// that do not have or require information about the block.
//
// Rules is a one time interface meaning that it shouldn't be used in between transition
// phases.
type Rules struct {
ChainID *big.Int
IsHomestead, IsEIP150, IsEIP155, IsEIP158 bool
IsByzantium, IsConstantinople, IsPetersburg, IsIstanbul bool
IsBerlin, IsLondon bool
IsMerge, IsShanghai, IsCancun, IsPrague bool
}
// Rules ensures c's ChainID is not nil.
func (c *ChainConfig) Rules(num *big.Int, isMerge bool, timestamp uint64) Rules {
chainID := c.ChainID
if chainID == nil {
chainID = new(big.Int)
}
return Rules{
ChainID: new(big.Int).Set(chainID),
IsHomestead: c.IsHomestead(num),
IsEIP150: c.IsEIP150(num),
IsEIP155: c.IsEIP155(num),
IsEIP158: c.IsEIP158(num),
IsByzantium: c.IsByzantium(num),
IsConstantinople: c.IsConstantinople(num),
IsPetersburg: c.IsPetersburg(num),
IsIstanbul: c.IsIstanbul(num),
IsBerlin: c.IsBerlin(num),
IsLondon: c.IsLondon(num),
IsMerge: isMerge,
IsShanghai: c.IsShanghai(timestamp),
IsCancun: c.IsCancun(timestamp),
IsPrague: c.IsPrague(timestamp),
}
}