bsc/params/config.go

// 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"
	"github.com/ethereum/go-ethereum/params/forks"
)

// Genesis hashes to enforce below configs on.
var (
	MainnetGenesisHash = common.HexToHash("0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3")

	BSCGenesisHash    = common.HexToHash("0x0d21840abff46b96c84b2ac9e10e4f5cdaeb5693cb665db62a2f3b02d2d57b5b")
	ChapelGenesisHash = common.HexToHash("0x6d3c66c5357ec91d5c43af47e234a939b22557cbb552dc45bebbceeed90fbe34")
	RialtoGenesisHash = common.HexToHash("0xee835a629f9cf5510b48b6ba41d69e0ff7d6ef10f977166ef939db41f59f5501")
)

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),
		RamanujanBlock:                big.NewInt(0),
		NielsBlock:                    big.NewInt(0),
		MirrorSyncBlock:               big.NewInt(0),
		BrunoBlock:                    big.NewInt(0),
		EulerBlock:                    big.NewInt(0),
		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),
		CancunTime:                    newUint64(1710338135),
		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),
		ArrowGlacierBlock:             nil,
		GrayGlacierBlock:              nil,
		TerminalTotalDifficulty:       big.NewInt(17_000_000_000_000_000),
		TerminalTotalDifficultyPassed: true,
		MergeNetsplitBlock:            big.NewInt(1735371),
		ShanghaiTime:                  newUint64(1677557088),
		CancunTime:                    newUint64(1706655072),
		Ethash:                        new(EthashConfig),
	}

	// just for prysm compile pass
	// 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),
		CancunTime:                    newUint64(1705473120),
		Clique: &CliqueConfig{
			Period: 15,
			Epoch:  30000,
		},
	}

	BSCChainConfig = &ChainConfig{
		ChainID:             big.NewInt(56),
		HomesteadBlock:      big.NewInt(0),
		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),
		RamanujanBlock:      big.NewInt(0),
		NielsBlock:          big.NewInt(0),
		MirrorSyncBlock:     big.NewInt(5184000),
		BrunoBlock:          big.NewInt(13082000),
		EulerBlock:          big.NewInt(18907621),
		NanoBlock:           big.NewInt(21962149),
		MoranBlock:          big.NewInt(22107423),
		GibbsBlock:          big.NewInt(23846001),
		PlanckBlock:         big.NewInt(27281024),
		LubanBlock:          big.NewInt(29020050),
		PlatoBlock:          big.NewInt(30720096),
		BerlinBlock:         big.NewInt(31302048),
		LondonBlock:         big.NewInt(31302048),
		HertzBlock:          big.NewInt(31302048),
		HertzfixBlock:       big.NewInt(34140700),
		ShanghaiTime:        newUint64(1705996800), // 2024-01-23 08:00:00 AM UTC
		KeplerTime:          newUint64(1705996800), // 2024-01-23 08:00:00 AM UTC
		FeynmanTime:         newUint64(1713419340), // 2024-04-18 05:49:00 AM UTC
		FeynmanFixTime:      newUint64(1713419340), // 2024-04-18 05:49:00 AM UTC
		CancunTime:          newUint64(1718863500), // 2024-06-20 06:05:00 AM UTC
		HaberTime:           newUint64(1718863500), // 2024-06-20 06:05:00 AM UTC
		BohrTime:            nil,

		Parlia: &ParliaConfig{
			Period: 3,
			Epoch:  200,
		},
	}

	ChapelChainConfig = &ChainConfig{
		ChainID:             big.NewInt(97),
		HomesteadBlock:      big.NewInt(0),
		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),
		RamanujanBlock:      big.NewInt(1010000),
		NielsBlock:          big.NewInt(1014369),
		MirrorSyncBlock:     big.NewInt(5582500),
		BrunoBlock:          big.NewInt(13837000),
		EulerBlock:          big.NewInt(19203503),
		GibbsBlock:          big.NewInt(22800220),
		NanoBlock:           big.NewInt(23482428),
		MoranBlock:          big.NewInt(23603940),
		PlanckBlock:         big.NewInt(28196022),
		LubanBlock:          big.NewInt(29295050),
		PlatoBlock:          big.NewInt(29861024),
		BerlinBlock:         big.NewInt(31103030),
		LondonBlock:         big.NewInt(31103030),
		HertzBlock:          big.NewInt(31103030),
		HertzfixBlock:       big.NewInt(35682300),
		ShanghaiTime:        newUint64(1702972800), // 2023-12-19 8:00:00 AM UTC
		KeplerTime:          newUint64(1702972800),
		FeynmanTime:         newUint64(1710136800), // 2024-03-11 6:00:00 AM UTC
		FeynmanFixTime:      newUint64(1711342800), // 2024-03-25 5:00:00 AM UTC
		CancunTime:          newUint64(1713330442), // 2024-04-17 05:07:22 AM UTC
		HaberTime:           newUint64(1716962820), // 2024-05-29 06:07:00 AM UTC
		BohrTime:            nil,

		Parlia: &ParliaConfig{
			Period: 3,
			Epoch:  200,
		},
	}

	// used to test hard fork upgrade, following https://github.com/bnb-chain/bsc-genesis-contract/blob/master/genesis.json
	RialtoChainConfig = &ChainConfig{
		ChainID:             big.NewInt(714),
		HomesteadBlock:      big.NewInt(0),
		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),
		RamanujanBlock:      big.NewInt(0),
		NielsBlock:          big.NewInt(0),
		MirrorSyncBlock:     big.NewInt(1),
		BrunoBlock:          big.NewInt(1),
		EulerBlock:          big.NewInt(2),
		NanoBlock:           big.NewInt(3),
		MoranBlock:          big.NewInt(3),
		GibbsBlock:          big.NewInt(4),
		PlanckBlock:         big.NewInt(5),
		LubanBlock:          big.NewInt(6),
		PlatoBlock:          big.NewInt(7),
		BerlinBlock:         big.NewInt(8),
		LondonBlock:         big.NewInt(8),
		HertzBlock:          big.NewInt(8),
		HertzfixBlock:       big.NewInt(8),
		ShanghaiTime:        newUint64(0),
		KeplerTime:          newUint64(0),
		FeynmanTime:         newUint64(0),
		FeynmanFixTime:      newUint64(0),
		CancunTime:          newUint64(0),
		HaberTime:           newUint64(0),
		HaberFixTime:        _rialto_upgrade_height_,
		BohrTime:            _rialto_upgrade_height_,

		Parlia: &ParliaConfig{
			Period: _rialto_parlia_period_,
			Epoch:  _rialto_parlia_period_,
		},
	}

	ParliaTestChainConfig = &ChainConfig{
		ChainID:             big.NewInt(2),
		HomesteadBlock:      big.NewInt(0),
		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),
		RamanujanBlock:      big.NewInt(0),
		NielsBlock:          big.NewInt(0),
		MirrorSyncBlock:     big.NewInt(0),
		BrunoBlock:          big.NewInt(0),
		EulerBlock:          big.NewInt(0),
		NanoBlock:           big.NewInt(0),
		MoranBlock:          big.NewInt(0),
		GibbsBlock:          big.NewInt(0),
		PlanckBlock:         big.NewInt(0),
		LubanBlock:          big.NewInt(0),
		PlatoBlock:          big.NewInt(0),
		BerlinBlock:         big.NewInt(0),
		LondonBlock:         big.NewInt(0),
		HertzBlock:          big.NewInt(0),
		HertzfixBlock:       big.NewInt(0),
		ShanghaiTime:        newUint64(0),
		KeplerTime:          newUint64(0),
		FeynmanTime:         newUint64(0),
		FeynmanFixTime:      newUint64(0),
		CancunTime:          newUint64(0),

		Parlia: &ParliaConfig{
			Period: 3,
			Epoch:  200,
		},
	}

	// 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,
		VerkleTime:                    nil,
		TerminalTotalDifficulty:       nil,
		TerminalTotalDifficultyPassed: true,
		Ethash:                        new(EthashConfig),
		Clique:                        nil,
	}

	AllDevChainProtocolChanges = &ChainConfig{
		ChainID:                       big.NewInt(1337),
		HomesteadBlock:                big.NewInt(0),
		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),
		ShanghaiTime:                  newUint64(0),
		CancunTime:                    newUint64(0),
		TerminalTotalDifficulty:       big.NewInt(0),
		TerminalTotalDifficultyPassed: true,
	}

	// 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,
		VerkleTime:                    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 purposes.
	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,
		VerkleTime:                    nil,
		TerminalTotalDifficulty:       nil,
		TerminalTotalDifficultyPassed: false,
		Ethash:                        new(EthashConfig),
		Clique:                        nil,
	}

	// MergedTestChainConfig contains every protocol change (EIPs) introduced
	// and accepted by the Ethereum core developers for testing purposes.
	MergedTestChainConfig = &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:            big.NewInt(0),
		ShanghaiTime:                  newUint64(0),
		CancunTime:                    newUint64(0),
		PragueTime:                    nil,
		VerkleTime:                    nil,
		TerminalTotalDifficulty:       big.NewInt(0),
		TerminalTotalDifficultyPassed: true,
		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,
		VerkleTime:                    nil,
		TerminalTotalDifficulty:       nil,
		TerminalTotalDifficultyPassed: false,
		Ethash:                        new(EthashConfig),
		Clique:                        nil,
	}
	TestRules = TestChainConfig.Rules(new(big.Int), false, 0)
)

func GetBuiltInChainConfig(ghash common.Hash) *ChainConfig {
	switch ghash {
	case MainnetGenesisHash:
		return MainnetChainConfig
	case BSCGenesisHash:
		return BSCChainConfig
	case ChapelGenesisHash:
		return ChapelChainConfig
	case RialtoGenesisHash:
		return RialtoChainConfig
	default:
		return nil
	}
}

// NetworkNames are user friendly names to use in the chain spec banner.
var NetworkNames = map[string]string{
	MainnetChainConfig.ChainID.String(): "mainnet",
}

// 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)
	YoloV3Block         *big.Int `json:"yoloV3Block,omitempty"`         // YOLO v3: Gas repricings TODO @holiman add EIP references
	CatalystBlock       *big.Int `json:"catalystBlock,omitempty"`       // Catalyst switch block (nil = no fork, 0 = already on catalyst)
	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)
	KeplerTime     *uint64 `json:"keplerTime,omitempty"`     // Kepler switch time (nil = no fork, 0 = already activated)
	FeynmanTime    *uint64 `json:"feynmanTime,omitempty"`    // Feynman switch time (nil = no fork, 0 = already activated)
	FeynmanFixTime *uint64 `json:"feynmanFixTime,omitempty"` // FeynmanFix switch time (nil = no fork, 0 = already activated)
	CancunTime     *uint64 `json:"cancunTime,omitempty"`     // Cancun switch time (nil = no fork, 0 = already on cancun)
	HaberTime      *uint64 `json:"haberTime,omitempty"`      // Haber switch time (nil = no fork, 0 = already on haber)
	HaberFixTime   *uint64 `json:"haberFixTime,omitempty"`   // HaberFix switch time (nil = no fork, 0 = already on haberFix)
	BohrTime       *uint64 `json:"bohrTime,omitempty"`       // Bohr switch time (nil = no fork, 0 = already on bohr)
	PragueTime     *uint64 `json:"pragueTime,omitempty"`     // Prague switch time (nil = no fork, 0 = already on prague)
	VerkleTime     *uint64 `json:"verkleTime,omitempty"`     // Verkle switch time (nil = no fork, 0 = already on verkle)

	// 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"`

	RamanujanBlock  *big.Int `json:"ramanujanBlock,omitempty"`  // ramanujanBlock switch block (nil = no fork, 0 = already activated)
	NielsBlock      *big.Int `json:"nielsBlock,omitempty"`      // nielsBlock switch block (nil = no fork, 0 = already activated)
	MirrorSyncBlock *big.Int `json:"mirrorSyncBlock,omitempty"` // mirrorSyncBlock switch block (nil = no fork, 0 = already activated)
	BrunoBlock      *big.Int `json:"brunoBlock,omitempty"`      // brunoBlock switch block (nil = no fork, 0 = already activated)
	EulerBlock      *big.Int `json:"eulerBlock,omitempty"`      // eulerBlock switch block (nil = no fork, 0 = already activated)
	GibbsBlock      *big.Int `json:"gibbsBlock,omitempty"`      // gibbsBlock switch block (nil = no fork, 0 = already activated)
	NanoBlock       *big.Int `json:"nanoBlock,omitempty"`       // nanoBlock switch block (nil = no fork, 0 = already activated)
	MoranBlock      *big.Int `json:"moranBlock,omitempty"`      // moranBlock switch block (nil = no fork, 0 = already activated)
	PlanckBlock     *big.Int `json:"planckBlock,omitempty"`     // planckBlock switch block (nil = no fork, 0 = already activated)
	LubanBlock      *big.Int `json:"lubanBlock,omitempty"`      // lubanBlock switch block (nil = no fork, 0 = already activated)
	PlatoBlock      *big.Int `json:"platoBlock,omitempty"`      // platoBlock switch block (nil = no fork, 0 = already activated)
	HertzBlock      *big.Int `json:"hertzBlock,omitempty"`      // hertzBlock switch block (nil = no fork, 0 = already activated)
	HertzfixBlock   *big.Int `json:"hertzfixBlock,omitempty"`   // hertzfixBlock switch block (nil = no fork, 0 = already activated)
	// Various consensus engines
	Ethash *EthashConfig `json:"ethash,omitempty"`
	Clique *CliqueConfig `json:"clique,omitempty"`
	Parlia *ParliaConfig `json:"parlia,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"
}

// ParliaConfig is the consensus engine configs for proof-of-staked-authority based sealing.
type ParliaConfig struct {
	Period uint64 `json:"period"` // Number of seconds between blocks to enforce
	Epoch  uint64 `json:"epoch"`  // Epoch length to update validatorSet
}

// String implements the stringer interface, returning the consensus engine details.
func (b *ParliaConfig) String() string {
	return "parlia"
}

func (c *ChainConfig) Description() string {
	return ""
}

// String implements the fmt.Stringer interface.
func (c *ChainConfig) String() string {
	var engine interface{}

	switch {
	case c.Ethash != nil:
		engine = c.Ethash
	case c.Clique != nil:
		engine = c.Clique
	case c.Parlia != nil:
		engine = c.Parlia
	default:
		engine = "unknown"
	}

	var ShanghaiTime *big.Int
	if c.ShanghaiTime != nil {
		ShanghaiTime = big.NewInt(0).SetUint64(*c.ShanghaiTime)
	}

	var KeplerTime *big.Int
	if c.KeplerTime != nil {
		KeplerTime = big.NewInt(0).SetUint64(*c.KeplerTime)
	}

	var FeynmanTime *big.Int
	if c.FeynmanTime != nil {
		FeynmanTime = big.NewInt(0).SetUint64(*c.FeynmanTime)
	}

	var FeynmanFixTime *big.Int
	if c.FeynmanFixTime != nil {
		FeynmanFixTime = big.NewInt(0).SetUint64(*c.FeynmanFixTime)
	}

	var CancunTime *big.Int
	if c.CancunTime != nil {
		CancunTime = big.NewInt(0).SetUint64(*c.CancunTime)
	}

	var HaberTime *big.Int
	if c.HaberTime != nil {
		HaberTime = big.NewInt(0).SetUint64(*c.HaberTime)
	}

	var HaberFixTime *big.Int
	if c.HaberFixTime != nil {
		HaberFixTime = big.NewInt(0).SetUint64(*c.HaberFixTime)
	}

	var BohrTime *big.Int
	if c.BohrTime != nil {
		BohrTime = big.NewInt(0).SetUint64(*c.BohrTime)
	}

	return fmt.Sprintf("{ChainID: %v Homestead: %v DAO: %v DAOSupport: %v EIP150: %v EIP155: %v EIP158: %v Byzantium: %v Constantinople: %v Petersburg: %v Istanbul: %v, Muir Glacier: %v, Ramanujan: %v, Niels: %v, MirrorSync: %v, Bruno: %v, Berlin: %v, YOLO v3: %v, CatalystBlock: %v, London: %v, ArrowGlacier: %v, MergeFork:%v, Euler: %v, Gibbs: %v, Nano: %v, Moran: %v, Planck: %v,Luban: %v, Plato: %v, Hertz: %v, Hertzfix: %v, ShanghaiTime: %v, KeplerTime: %v, FeynmanTime: %v, FeynmanFixTime: %v, CancunTime: %v, HaberTime: %v, HaberFixTime: %v, BohrTime: %v, Engine: %v}",
		c.ChainID,
		c.HomesteadBlock,
		c.DAOForkBlock,
		c.DAOForkSupport,
		c.EIP150Block,
		c.EIP155Block,
		c.EIP158Block,
		c.ByzantiumBlock,
		c.ConstantinopleBlock,
		c.PetersburgBlock,
		c.IstanbulBlock,
		c.MuirGlacierBlock,
		c.RamanujanBlock,
		c.NielsBlock,
		c.MirrorSyncBlock,
		c.BrunoBlock,
		c.BerlinBlock,
		c.YoloV3Block,
		c.CatalystBlock,
		c.LondonBlock,
		c.ArrowGlacierBlock,
		c.MergeNetsplitBlock,
		c.EulerBlock,
		c.GibbsBlock,
		c.NanoBlock,
		c.MoranBlock,
		c.PlanckBlock,
		c.LubanBlock,
		c.PlatoBlock,
		c.HertzBlock,
		c.HertzfixBlock,
		ShanghaiTime,
		KeplerTime,
		FeynmanTime,
		FeynmanFixTime,
		CancunTime,
		HaberTime,
		HaberFixTime,
		BohrTime,
		engine,
	)
}

// 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)
}

// IsRamanujan returns whether num is either equal to the IsRamanujan fork block or greater.
func (c *ChainConfig) IsRamanujan(num *big.Int) bool {
	return isBlockForked(c.RamanujanBlock, num)
}

// IsOnRamanujan returns whether num is equal to the Ramanujan fork block
func (c *ChainConfig) IsOnRamanujan(num *big.Int) bool {
	return configBlockEqual(c.RamanujanBlock, num)
}

// IsNiels returns whether num is either equal to the Niels fork block or greater.
func (c *ChainConfig) IsNiels(num *big.Int) bool {
	return isBlockForked(c.NielsBlock, num)
}

// IsOnNiels returns whether num is equal to the IsNiels fork block
func (c *ChainConfig) IsOnNiels(num *big.Int) bool {
	return configBlockEqual(c.NielsBlock, num)
}

// IsMirrorSync returns whether num is either equal to the MirrorSync fork block or greater.
func (c *ChainConfig) IsMirrorSync(num *big.Int) bool {
	return isBlockForked(c.MirrorSyncBlock, num)
}

// IsOnMirrorSync returns whether num is equal to the MirrorSync fork block
func (c *ChainConfig) IsOnMirrorSync(num *big.Int) bool {
	return configBlockEqual(c.MirrorSyncBlock, num)
}

// IsBruno returns whether num is either equal to the Burn fork block or greater.
func (c *ChainConfig) IsBruno(num *big.Int) bool {
	return isBlockForked(c.BrunoBlock, num)
}

// IsOnBruno returns whether num is equal to the Burn fork block
func (c *ChainConfig) IsOnBruno(num *big.Int) bool {
	return configBlockEqual(c.BrunoBlock, num)
}

// IsEuler returns whether num is either equal to the euler fork block or greater.
func (c *ChainConfig) IsEuler(num *big.Int) bool {
	return isBlockForked(c.EulerBlock, num)
}

// IsOnEuler returns whether num is equal to the euler fork block
func (c *ChainConfig) IsOnEuler(num *big.Int) bool {
	return configBlockEqual(c.EulerBlock, num)
}

// IsLuban returns whether num is either equal to the first fast finality fork block or greater.
func (c *ChainConfig) IsLuban(num *big.Int) bool {
	return isBlockForked(c.LubanBlock, num)
}

// IsOnLuban returns whether num is equal to the first fast finality fork block.
func (c *ChainConfig) IsOnLuban(num *big.Int) bool {
	return configBlockEqual(c.LubanBlock, num)
}

// IsPlato returns whether num is either equal to the second fast finality fork block or greater.
func (c *ChainConfig) IsPlato(num *big.Int) bool {
	return isBlockForked(c.PlatoBlock, num)
}

// IsOnPlato returns whether num is equal to the second fast finality fork block.
func (c *ChainConfig) IsOnPlato(num *big.Int) bool {
	return configBlockEqual(c.PlatoBlock, num)
}

// IsHertz returns whether num is either equal to the block of enabling Berlin EIPs or greater.
func (c *ChainConfig) IsHertz(num *big.Int) bool {
	return isBlockForked(c.HertzBlock, num)
}

// IsOnHertz returns whether num is equal to the fork block of enabling Berlin EIPs.
func (c *ChainConfig) IsOnHertz(num *big.Int) bool {
	return configBlockEqual(c.HertzBlock, num)
}

func (c *ChainConfig) IsHertzfix(num *big.Int) bool {
	return isBlockForked(c.HertzfixBlock, num)
}

func (c *ChainConfig) IsOnHertzfix(num *big.Int) bool {
	return configBlockEqual(c.HertzfixBlock, 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
}

// IsGibbs returns whether num is either equal to the gibbs fork block or greater.
func (c *ChainConfig) IsGibbs(num *big.Int) bool {
	return isBlockForked(c.GibbsBlock, num)
}

// IsOnGibbs returns whether num is equal to the gibbs fork block
func (c *ChainConfig) IsOnGibbs(num *big.Int) bool {
	return configBlockEqual(c.GibbsBlock, num)
}

func (c *ChainConfig) IsNano(num *big.Int) bool {
	return isBlockForked(c.NanoBlock, num)
}

func (c *ChainConfig) IsOnNano(num *big.Int) bool {
	return configBlockEqual(c.NanoBlock, num)
}

func (c *ChainConfig) IsMoran(num *big.Int) bool {
	return isBlockForked(c.MoranBlock, num)
}

func (c *ChainConfig) IsOnMoran(num *big.Int) bool {
	return configBlockEqual(c.MoranBlock, num)
}

func (c *ChainConfig) IsPlanck(num *big.Int) bool {
	return isBlockForked(c.PlanckBlock, num)
}

func (c *ChainConfig) IsOnPlanck(num *big.Int) bool {
	return configBlockEqual(c.PlanckBlock, num)
}

// IsShanghai returns whether time is either equal to the Shanghai fork time or greater.
func (c *ChainConfig) IsShanghai(num *big.Int, time uint64) bool {
	return c.IsLondon(num) && isTimestampForked(c.ShanghaiTime, time)
}

// IsOnShanghai returns whether currentBlockTime is either equal to the shanghai fork time or greater firstly.
func (c *ChainConfig) IsOnShanghai(currentBlockNumber *big.Int, lastBlockTime uint64, currentBlockTime uint64) bool {
	lastBlockNumber := new(big.Int)
	if currentBlockNumber.Cmp(big.NewInt(1)) >= 0 {
		lastBlockNumber.Sub(currentBlockNumber, big.NewInt(1))
	}
	return !c.IsShanghai(lastBlockNumber, lastBlockTime) && c.IsShanghai(currentBlockNumber, currentBlockTime)
}

// IsKepler returns whether time is either equal to the kepler fork time or greater.
func (c *ChainConfig) IsKepler(num *big.Int, time uint64) bool {
	return c.IsLondon(num) && isTimestampForked(c.KeplerTime, time)
}

// IsOnKepler returns whether currentBlockTime is either equal to the kepler fork time or greater firstly.
func (c *ChainConfig) IsOnKepler(currentBlockNumber *big.Int, lastBlockTime uint64, currentBlockTime uint64) bool {
	lastBlockNumber := new(big.Int)
	if currentBlockNumber.Cmp(big.NewInt(1)) >= 0 {
		lastBlockNumber.Sub(currentBlockNumber, big.NewInt(1))
	}
	return !c.IsKepler(lastBlockNumber, lastBlockTime) && c.IsKepler(currentBlockNumber, currentBlockTime)
}

// IsFeynman returns whether time is either equal to the Feynman fork time or greater.
func (c *ChainConfig) IsFeynman(num *big.Int, time uint64) bool {
	return c.IsLondon(num) && isTimestampForked(c.FeynmanTime, time)
}

// IsOnFeynman returns whether currentBlockTime is either equal to the Feynman fork time or greater firstly.
func (c *ChainConfig) IsOnFeynman(currentBlockNumber *big.Int, lastBlockTime uint64, currentBlockTime uint64) bool {
	lastBlockNumber := new(big.Int)
	if currentBlockNumber.Cmp(big.NewInt(1)) >= 0 {
		lastBlockNumber.Sub(currentBlockNumber, big.NewInt(1))
	}
	return !c.IsFeynman(lastBlockNumber, lastBlockTime) && c.IsFeynman(currentBlockNumber, currentBlockTime)
}

// IsFeynmanFix returns whether time is either equal to the FeynmanFix fork time or greater.
func (c *ChainConfig) IsFeynmanFix(num *big.Int, time uint64) bool {
	return c.IsLondon(num) && isTimestampForked(c.FeynmanFixTime, time)
}

// IsOnFeynmanFix returns whether currentBlockTime is either equal to the FeynmanFix fork time or greater firstly.
func (c *ChainConfig) IsOnFeynmanFix(currentBlockNumber *big.Int, lastBlockTime uint64, currentBlockTime uint64) bool {
	lastBlockNumber := new(big.Int)
	if currentBlockNumber.Cmp(big.NewInt(1)) >= 0 {
		lastBlockNumber.Sub(currentBlockNumber, big.NewInt(1))
	}
	return !c.IsFeynmanFix(lastBlockNumber, lastBlockTime) && c.IsFeynmanFix(currentBlockNumber, currentBlockTime)
}

// IsCancun returns whether num is either equal to the Cancun fork time or greater.
func (c *ChainConfig) IsCancun(num *big.Int, time uint64) bool {
	return c.IsLondon(num) && isTimestampForked(c.CancunTime, time)
}

// IsHaber returns whether time is either equal to the Haber fork time or greater.
func (c *ChainConfig) IsHaber(num *big.Int, time uint64) bool {
	return c.IsLondon(num) && isTimestampForked(c.HaberTime, time)
}

// IsHaberFix returns whether time is either equal to the HaberFix fork time or greater.
func (c *ChainConfig) IsHaberFix(num *big.Int, time uint64) bool {
	return c.IsLondon(num) && isTimestampForked(c.HaberFixTime, time)
}

// IsOnHaberFix returns whether currentBlockTime is either equal to the HaberFix fork time or greater firstly.
func (c *ChainConfig) IsOnHaberFix(currentBlockNumber *big.Int, lastBlockTime uint64, currentBlockTime uint64) bool {
	lastBlockNumber := new(big.Int)
	if currentBlockNumber.Cmp(big.NewInt(1)) >= 0 {
		lastBlockNumber.Sub(currentBlockNumber, big.NewInt(1))
	}
	return !c.IsHaberFix(lastBlockNumber, lastBlockTime) && c.IsHaberFix(currentBlockNumber, currentBlockTime)
}

// IsBohr returns whether time is either equal to the Bohr fork time or greater.
func (c *ChainConfig) IsBohr(num *big.Int, time uint64) bool {
	return c.IsLondon(num) && isTimestampForked(c.BohrTime, time)
}

// IsOnBohr returns whether currentBlockTime is either equal to the Bohr fork time or greater firstly.
func (c *ChainConfig) IsOnBohr(currentBlockNumber *big.Int, lastBlockTime uint64, currentBlockTime uint64) bool {
	lastBlockNumber := new(big.Int)
	if currentBlockNumber.Cmp(big.NewInt(1)) >= 0 {
		lastBlockNumber.Sub(currentBlockNumber, big.NewInt(1))
	}
	return !c.IsBohr(lastBlockNumber, lastBlockTime) && c.IsBohr(currentBlockNumber, currentBlockTime)
}

// IsPrague returns whether num is either equal to the Prague fork time or greater.
func (c *ChainConfig) IsPrague(num *big.Int, time uint64) bool {
	return c.IsLondon(num) && isTimestampForked(c.PragueTime, time)
}

// IsVerkle returns whether num is either equal to the Verkle fork time or greater.
func (c *ChainConfig) IsVerkle(num *big.Int, time uint64) bool {
	return c.IsLondon(num) && isTimestampForked(c.VerkleTime, 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 {
	// skip checking for non-Parlia egine
	if c.Parlia == nil {
		return nil
	}
	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: "mirrorSyncBlock", block: c.MirrorSyncBlock},
		{name: "brunoBlock", block: c.BrunoBlock},
		{name: "eulerBlock", block: c.EulerBlock},
		{name: "gibbsBlock", block: c.GibbsBlock},
		{name: "planckBlock", block: c.PlanckBlock},
		{name: "lubanBlock", block: c.LubanBlock},
		{name: "platoBlock", block: c.PlatoBlock},
		{name: "hertzBlock", block: c.HertzBlock},
		{name: "hertzfixBlock", block: c.HertzfixBlock},
		{name: "keplerTime", timestamp: c.KeplerTime},
		{name: "feynmanTime", timestamp: c.FeynmanTime},
		{name: "feynmanFixTime", timestamp: c.FeynmanFixTime},
		{name: "cancunTime", timestamp: c.CancunTime},
		{name: "haberTime", timestamp: c.HaberTime},
		{name: "haberFixTime", timestamp: c.HaberFixTime},
		{name: "bohrTime", timestamp: c.BohrTime},
		{name: "pragueTime", timestamp: c.PragueTime, optional: true},
		{name: "verkleTime", timestamp: c.VerkleTime, 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 Start fork block", c.MergeNetsplitBlock, newcfg.MergeNetsplitBlock)
	}
	if isForkBlockIncompatible(c.RamanujanBlock, newcfg.RamanujanBlock, headNumber) {
		return newBlockCompatError("ramanujan fork block", c.RamanujanBlock, newcfg.RamanujanBlock)
	}
	if isForkBlockIncompatible(c.MirrorSyncBlock, newcfg.MirrorSyncBlock, headNumber) {
		return newBlockCompatError("mirrorSync fork block", c.MirrorSyncBlock, newcfg.MirrorSyncBlock)
	}
	if isForkBlockIncompatible(c.BrunoBlock, newcfg.BrunoBlock, headNumber) {
		return newBlockCompatError("bruno fork block", c.BrunoBlock, newcfg.BrunoBlock)
	}
	if isForkBlockIncompatible(c.EulerBlock, newcfg.EulerBlock, headNumber) {
		return newBlockCompatError("euler fork block", c.EulerBlock, newcfg.EulerBlock)
	}
	if isForkBlockIncompatible(c.GibbsBlock, newcfg.GibbsBlock, headNumber) {
		return newBlockCompatError("gibbs fork block", c.GibbsBlock, newcfg.GibbsBlock)
	}
	if isForkBlockIncompatible(c.NanoBlock, newcfg.NanoBlock, headNumber) {
		return newBlockCompatError("nano fork block", c.NanoBlock, newcfg.NanoBlock)
	}
	if isForkBlockIncompatible(c.MoranBlock, newcfg.MoranBlock, headNumber) {
		return newBlockCompatError("moran fork block", c.MoranBlock, newcfg.MoranBlock)
	}
	if isForkBlockIncompatible(c.PlanckBlock, newcfg.PlanckBlock, headNumber) {
		return newBlockCompatError("planck fork block", c.PlanckBlock, newcfg.PlanckBlock)
	}
	if isForkBlockIncompatible(c.LubanBlock, newcfg.LubanBlock, headNumber) {
		return newBlockCompatError("luban fork block", c.LubanBlock, newcfg.LubanBlock)
	}
	if isForkBlockIncompatible(c.PlatoBlock, newcfg.PlatoBlock, headNumber) {
		return newBlockCompatError("plato fork block", c.PlatoBlock, newcfg.PlatoBlock)
	}
	if isForkBlockIncompatible(c.HertzBlock, newcfg.HertzBlock, headNumber) {
		return newBlockCompatError("hertz fork block", c.HertzBlock, newcfg.HertzBlock)
	}
	if isForkBlockIncompatible(c.HertzfixBlock, newcfg.HertzfixBlock, headNumber) {
		return newBlockCompatError("hertzfix fork block", c.HertzfixBlock, newcfg.HertzfixBlock)
	}
	if isForkTimestampIncompatible(c.ShanghaiTime, newcfg.ShanghaiTime, headTimestamp) {
		return newTimestampCompatError("Shanghai fork timestamp", c.ShanghaiTime, newcfg.ShanghaiTime)
	}
	if isForkTimestampIncompatible(c.KeplerTime, newcfg.KeplerTime, headTimestamp) {
		return newTimestampCompatError("Kepler fork timestamp", c.KeplerTime, newcfg.KeplerTime)
	}
	if isForkTimestampIncompatible(c.FeynmanTime, newcfg.FeynmanTime, headTimestamp) {
		return newTimestampCompatError("Feynman fork timestamp", c.FeynmanTime, newcfg.FeynmanTime)
	}
	if isForkTimestampIncompatible(c.FeynmanFixTime, newcfg.FeynmanFixTime, headTimestamp) {
		return newTimestampCompatError("FeynmanFix fork timestamp", c.FeynmanFixTime, newcfg.FeynmanFixTime)
	}
	if isForkTimestampIncompatible(c.CancunTime, newcfg.CancunTime, headTimestamp) {
		return newTimestampCompatError("Cancun fork timestamp", c.CancunTime, newcfg.CancunTime)
	}
	if isForkTimestampIncompatible(c.HaberTime, newcfg.HaberTime, headTimestamp) {
		return newTimestampCompatError("Haber fork timestamp", c.HaberTime, newcfg.HaberTime)
	}
	if isForkTimestampIncompatible(c.HaberFixTime, newcfg.HaberFixTime, headTimestamp) {
		return newTimestampCompatError("HaberFix fork timestamp", c.HaberFixTime, newcfg.HaberFixTime)
	}
	if isForkTimestampIncompatible(c.PragueTime, newcfg.PragueTime, headTimestamp) {
		return newTimestampCompatError("Prague fork timestamp", c.PragueTime, newcfg.PragueTime)
	}
	if isForkTimestampIncompatible(c.VerkleTime, newcfg.VerkleTime, headTimestamp) {
		return newTimestampCompatError("Verkle fork timestamp", c.VerkleTime, newcfg.VerkleTime)
	}
	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
}

// LatestFork returns the latest time-based fork that would be active for the given time.
// only include forks from ethereum
func (c *ChainConfig) LatestFork(time uint64) forks.Fork {
	// Assume last non-time-based fork has passed.
	london := c.LondonBlock

	switch {
	case c.IsPrague(london, time):
		return forks.Prague
	case c.IsCancun(london, time):
		return forks.Cancun
	case c.IsShanghai(london, time):
		return forks.Shanghai
	default:
		return forks.Paris
	}
}

// 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 && *rew != 0 {
		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)
	}

	if err.StoredTime == nil {
		return fmt.Sprintf("mismatching %s in database (have timestamp nil, want timestamp %d, rewindto timestamp %d)", err.What, *err.NewTime, err.RewindToTime)
	} else if err.NewTime == nil {
		return fmt.Sprintf("mismatching %s in database (have timestamp %d, want timestamp nil, rewindto timestamp %d)", err.What, *err.StoredTime, err.RewindToTime)
	}
	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                                                 bool
	IsNano                                                  bool
	IsMoran                                                 bool
	IsPlanck                                                bool
	IsLuban                                                 bool
	IsPlato                                                 bool
	IsHertz                                                 bool
	IsHertzfix                                              bool
	IsShanghai, IsKepler, IsFeynman, IsCancun, IsHaber      bool
	IsBohr, IsPrague, IsVerkle                              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)
	}
	// disallow setting Merge out of order
	isMerge = isMerge && c.IsLondon(num)
	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,
		IsNano:           c.IsNano(num),
		IsMoran:          c.IsMoran(num),
		IsPlanck:         c.IsPlanck(num),
		IsLuban:          c.IsLuban(num),
		IsPlato:          c.IsPlato(num),
		IsHertz:          c.IsHertz(num),
		IsHertzfix:       c.IsHertzfix(num),
		IsShanghai:       c.IsShanghai(num, timestamp),
		IsKepler:         c.IsKepler(num, timestamp),
		IsFeynman:        c.IsFeynman(num, timestamp),
		IsCancun:         c.IsCancun(num, timestamp),
		IsHaber:          c.IsHaber(num, timestamp),
		IsBohr:           c.IsBohr(num, timestamp),
		IsPrague:         c.IsPrague(num, timestamp),
		IsVerkle:         c.IsVerkle(num, timestamp),
	}
}