// 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 (
	"encoding/binary"
	"encoding/json"
	"fmt"
	"math/big"

	"golang.org/x/crypto/sha3"

	"github.com/scroll-tech/go-ethereum/common"
	"github.com/scroll-tech/go-ethereum/rollup/rcfg"
)

// Genesis hashes to enforce below configs on.
var (
	MainnetGenesisHash                     = common.HexToHash("0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3")
	RopstenGenesisHash                     = common.HexToHash("0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d")
	SepoliaGenesisHash                     = common.HexToHash("0x25a5cc106eea7138acab33231d7160d69cb777ee0c2c553fcddf5138993e6dd9")
	RinkebyGenesisHash                     = common.HexToHash("0x6341fd3daf94b748c72ced5a5b26028f2474f5f00d824504e4fa37a75767e177")
	GoerliGenesisHash                      = common.HexToHash("0xbf7e331f7f7c1dd2e05159666b3bf8bc7a8a3a9eb1d518969eab529dd9b88c1a")
	ScrollAlphaGenesisHash                 = common.HexToHash("0xa4fc62b9b0643e345bdcebe457b3ae898bef59c7203c3db269200055e037afda")
	ScrollSepoliaGenesisHash               = common.HexToHash("0xaa62d1a8b2bffa9e5d2368b63aae0d98d54928bd713125e3fd9e5c896c68592c")
	ScrollMainnetGenesisHash               = common.HexToHash("0xbbc05efd412b7cd47a2ed0e5ddfcf87af251e414ea4c801d78b6784513180a80")
	ScrollSepoliaGenesisState              = common.HexToHash("0x20695989e9038823e35f0e88fbc44659ffdbfa1fe89fbeb2689b43f15fa64cb5")
	ScrollMainnetGenesisState              = common.HexToHash("0x08d535cc60f40af5dd3b31e0998d7567c2d568b224bed2ba26070aeb078d1339")
	ScrollMainnetMissingHeaderFieldsSHA256 = common.HexToHash("0xfa2746026ec9590e37e495cb20046e20a38fd0e7099abd2012640dddf6c88b25")
	ScrollSepoliaMissingHeaderFieldsSHA256 = common.HexToHash("0xa02354c12ca0f918bf4768255af9ed13c137db7e56252348f304b17bb4088924")
)

func newUint64(val uint64) *uint64 { return &val }

// TrustedCheckpoints associates each known checkpoint with the genesis hash of
// the chain it belongs to.
var TrustedCheckpoints = map[common.Hash]*TrustedCheckpoint{
	MainnetGenesisHash: MainnetTrustedCheckpoint,
	RopstenGenesisHash: RopstenTrustedCheckpoint,
	SepoliaGenesisHash: SepoliaTrustedCheckpoint,
	RinkebyGenesisHash: RinkebyTrustedCheckpoint,
	GoerliGenesisHash:  GoerliTrustedCheckpoint,
}

// CheckpointOracles associates each known checkpoint oracles with the genesis hash of
// the chain it belongs to.
var CheckpointOracles = map[common.Hash]*CheckpointOracleConfig{
	MainnetGenesisHash: MainnetCheckpointOracle,
	RopstenGenesisHash: RopstenCheckpointOracle,
	RinkebyGenesisHash: RinkebyCheckpointOracle,
	GoerliGenesisHash:  GoerliCheckpointOracle,
}

var (
	// 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),
		EIP150Hash:          common.HexToHash("0x2086799aeebeae135c246c65021c82b4e15a2c451340993aacfd2751886514f0"),
		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),
		Ethash:              new(EthashConfig),
	}

	// MainnetTrustedCheckpoint contains the light client trusted checkpoint for the main network.
	MainnetTrustedCheckpoint = &TrustedCheckpoint{
		SectionIndex: 413,
		SectionHead:  common.HexToHash("0x8aa8e64ceadcdc5f23bc41d2acb7295a261a5cf680bb00a34f0e01af08200083"),
		CHTRoot:      common.HexToHash("0x008af584d385a2610706c5a439d39f15ddd4b691c5d42603f65ae576f703f477"),
		BloomRoot:    common.HexToHash("0x5a081af71a588f4d90bced242545b08904ad4fb92f7effff2ceb6e50e6dec157"),
	}

	// MainnetCheckpointOracle contains a set of configs for the main network oracle.
	MainnetCheckpointOracle = &CheckpointOracleConfig{
		Address: common.HexToAddress("0x9a9070028361F7AAbeB3f2F2Dc07F82C4a98A02a"),
		Signers: []common.Address{
			common.HexToAddress("0x1b2C260efc720BE89101890E4Db589b44E950527"), // Peter
			common.HexToAddress("0x78d1aD571A1A09D60D9BBf25894b44e4C8859595"), // Martin
			common.HexToAddress("0x286834935f4A8Cfb4FF4C77D5770C2775aE2b0E7"), // Zsolt
			common.HexToAddress("0xb86e2B0Ab5A4B1373e40c51A7C712c70Ba2f9f8E"), // Gary
			common.HexToAddress("0x0DF8fa387C602AE62559cC4aFa4972A7045d6707"), // Guillaume
		},
		Threshold: 2,
	}

	// RopstenChainConfig contains the chain parameters to run a node on the Ropsten test network.
	RopstenChainConfig = &ChainConfig{
		ChainID:             big.NewInt(3),
		HomesteadBlock:      big.NewInt(0),
		DAOForkBlock:        nil,
		DAOForkSupport:      true,
		EIP150Block:         big.NewInt(0),
		EIP150Hash:          common.HexToHash("0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d"),
		EIP155Block:         big.NewInt(10),
		EIP158Block:         big.NewInt(10),
		ByzantiumBlock:      big.NewInt(1_700_000),
		ConstantinopleBlock: big.NewInt(4_230_000),
		PetersburgBlock:     big.NewInt(4_939_394),
		IstanbulBlock:       big.NewInt(6_485_846),
		MuirGlacierBlock:    big.NewInt(7_117_117),
		BerlinBlock:         big.NewInt(9_812_189),
		LondonBlock:         big.NewInt(10_499_401),
		Ethash:              new(EthashConfig),
	}

	// RopstenTrustedCheckpoint contains the light client trusted checkpoint for the Ropsten test network.
	RopstenTrustedCheckpoint = &TrustedCheckpoint{
		SectionIndex: 346,
		SectionHead:  common.HexToHash("0xafa0384ebd13a751fb7475aaa7fc08ac308925c8b2e2195bca2d4ab1878a7a84"),
		CHTRoot:      common.HexToHash("0x522ae1f334bfa36033b2315d0b9954052780700b69448ecea8d5877e0f7ee477"),
		BloomRoot:    common.HexToHash("0x4093fd53b0d2cc50181dca353fe66f03ae113e7cb65f869a4dfb5905de6a0493"),
	}

	// RopstenCheckpointOracle contains a set of configs for the Ropsten test network oracle.
	RopstenCheckpointOracle = &CheckpointOracleConfig{
		Address: common.HexToAddress("0xEF79475013f154E6A65b54cB2742867791bf0B84"),
		Signers: []common.Address{
			common.HexToAddress("0x32162F3581E88a5f62e8A61892B42C46E2c18f7b"), // Peter
			common.HexToAddress("0x78d1aD571A1A09D60D9BBf25894b44e4C8859595"), // Martin
			common.HexToAddress("0x286834935f4A8Cfb4FF4C77D5770C2775aE2b0E7"), // Zsolt
			common.HexToAddress("0xb86e2B0Ab5A4B1373e40c51A7C712c70Ba2f9f8E"), // Gary
			common.HexToAddress("0x0DF8fa387C602AE62559cC4aFa4972A7045d6707"), // Guillaume
		},
		Threshold: 2,
	}

	// 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),
		Ethash:              new(EthashConfig),
	}

	// SepoliaTrustedCheckpoint contains the light client trusted checkpoint for the Sepolia test network.
	SepoliaTrustedCheckpoint = &TrustedCheckpoint{
		SectionIndex: 1,
		SectionHead:  common.HexToHash("0x5dde65e28745b10ff9e9b86499c3a3edc03587b27a06564a4342baf3a37de869"),
		CHTRoot:      common.HexToHash("0x042a0d914f7baa4f28f14d12291e5f346e88c5b9d95127bf5422a8afeacd27e8"),
		BloomRoot:    common.HexToHash("0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"),
	}

	// 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),
		EIP150Hash:          common.HexToHash("0x9b095b36c15eaf13044373aef8ee0bd3a382a5abb92e402afa44b8249c3a90e9"),
		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,
		},
	}

	// RinkebyTrustedCheckpoint contains the light client trusted checkpoint for the Rinkeby test network.
	RinkebyTrustedCheckpoint = &TrustedCheckpoint{
		SectionIndex: 292,
		SectionHead:  common.HexToHash("0x4185c2f1bb85ecaa04409d1008ff0761092ea2e94e8a71d64b1a5abc37b81414"),
		CHTRoot:      common.HexToHash("0x03b0191e6140effe0b88bb7c97bfb794a275d3543cb3190662fb72d9beea423c"),
		BloomRoot:    common.HexToHash("0x3d5f6edccc87536dcbc0dd3aae97a318205c617dd3957b4261470c71481629e2"),
	}

	// RinkebyCheckpointOracle contains a set of configs for the Rinkeby test network oracle.
	RinkebyCheckpointOracle = &CheckpointOracleConfig{
		Address: common.HexToAddress("0xebe8eFA441B9302A0d7eaECc277c09d20D684540"),
		Signers: []common.Address{
			common.HexToAddress("0xd9c9cd5f6779558b6e0ed4e6acf6b1947e7fa1f3"), // Peter
			common.HexToAddress("0x78d1aD571A1A09D60D9BBf25894b44e4C8859595"), // Martin
			common.HexToAddress("0x286834935f4A8Cfb4FF4C77D5770C2775aE2b0E7"), // Zsolt
			common.HexToAddress("0xb86e2B0Ab5A4B1373e40c51A7C712c70Ba2f9f8E"), // Gary
		},
		Threshold: 2,
	}

	// 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,
		Clique: &CliqueConfig{
			Period: 15,
			Epoch:  30000,
		},
	}

	// GoerliTrustedCheckpoint contains the light client trusted checkpoint for the Görli test network.
	GoerliTrustedCheckpoint = &TrustedCheckpoint{
		SectionIndex: 176,
		SectionHead:  common.HexToHash("0x2de018858528434f93adb40b1f03f2304a86d31b4ef2b1f930da0134f5c32427"),
		CHTRoot:      common.HexToHash("0x8c17e497d38088321c147abe4acbdfb3c0cab7d7a2b97e07404540f04d12747e"),
		BloomRoot:    common.HexToHash("0x02a41b6606bd3f741bd6ae88792d75b1ad8cf0ea5e28fbaa03bc8b95cbd20034"),
	}

	// GoerliCheckpointOracle contains a set of configs for the Goerli test network oracle.
	GoerliCheckpointOracle = &CheckpointOracleConfig{
		Address: common.HexToAddress("0x18CA0E045F0D772a851BC7e48357Bcaab0a0795D"),
		Signers: []common.Address{
			common.HexToAddress("0x4769bcaD07e3b938B7f43EB7D278Bc7Cb9efFb38"), // Peter
			common.HexToAddress("0x78d1aD571A1A09D60D9BBf25894b44e4C8859595"), // Martin
			common.HexToAddress("0x286834935f4A8Cfb4FF4C77D5770C2775aE2b0E7"), // Zsolt
			common.HexToAddress("0xb86e2B0Ab5A4B1373e40c51A7C712c70Ba2f9f8E"), // Gary
			common.HexToAddress("0x0DF8fa387C602AE62559cC4aFa4972A7045d6707"), // Guillaume
		},
		Threshold: 2,
	}

	// ScrollAlphaChainConfig contains the chain parameters to run a node on the Scroll Alpha test network.
	ScrollMaxTxPerBlock             = 100
	ScrollMaxTxPayloadBytesPerBlock = 120 * 1024

	ScrollAlphaChainConfig = &ChainConfig{
		ChainID:             big.NewInt(534353),
		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:    nil,
		BerlinBlock:         big.NewInt(0),
		LondonBlock:         big.NewInt(0),
		ArrowGlacierBlock:   nil,
		ArchimedesBlock:     big.NewInt(2646311),
		ShanghaiBlock:       nil,
		BernoulliBlock:      nil,
		CurieBlock:          nil,
		DarwinTime:          nil,
		DarwinV2Time:        nil,
		Clique: &CliqueConfig{
			Period: 3,
			Epoch:  30000,
		},
		Scroll: ScrollConfig{
			UseZktrie:                 true,
			MaxTxPerBlock:             &ScrollMaxTxPerBlock,
			MaxTxPayloadBytesPerBlock: &ScrollMaxTxPayloadBytesPerBlock,
			FeeVaultAddress:           &rcfg.ScrollFeeVaultAddress,
			L1Config: &L1Config{
				L1ChainId:             5,
				L1MessageQueueAddress: common.HexToAddress("0x79DB48002Aa861C8cb189cabc21c6B1468BC83BB"),
				NumL1MessagesPerBlock: 0,
				ScrollChainAddress:    common.HexToAddress("0x3C584eC7f0f2764CC715ac3180Ae9828465E9833"),
			},
		},
	}

	ScrollSepoliaChainConfig = &ChainConfig{
		ChainID:             big.NewInt(534351),
		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:    nil,
		BerlinBlock:         big.NewInt(0),
		LondonBlock:         big.NewInt(0),
		ArrowGlacierBlock:   nil,
		ArchimedesBlock:     big.NewInt(0),
		ShanghaiBlock:       big.NewInt(0),
		BernoulliBlock:      big.NewInt(3747132),
		CurieBlock:          big.NewInt(4740239),
		DarwinTime:          newUint64(1723622400),
		DarwinV2Time:        newUint64(1724832000),
		EuclidTime:          newUint64(1741680000),
		EuclidV2Time:        newUint64(1741852800),
		FeynmanTime:         nil,
		Clique: &CliqueConfig{
			Period: 3,
			Epoch:  30000,
		},
		SystemContract: &SystemContractConfig{
			Period:                3,
			SystemContractAddress: common.HexToAddress("0xC706Ba9fa4fedF4507CB7A898b4766c1bbf9be57"),
			SystemContractSlot:    common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000067"),
		},
		Scroll: ScrollConfig{
			UseZktrie:                 true,
			MaxTxPerBlock:             &ScrollMaxTxPerBlock,
			MaxTxPayloadBytesPerBlock: &ScrollMaxTxPayloadBytesPerBlock,
			FeeVaultAddress:           &rcfg.ScrollFeeVaultAddress,
			L1Config: &L1Config{
				L1ChainId:                       11155111,
				L1MessageQueueAddress:           common.HexToAddress("0xF0B2293F5D834eAe920c6974D50957A1732de763"),
				L1MessageQueueV2Address:         common.HexToAddress("0xA0673eC0A48aa924f067F1274EcD281A10c5f19F"),
				L1MessageQueueV2DeploymentBlock: 7773746,
				NumL1MessagesPerBlock:           10,
				ScrollChainAddress:              common.HexToAddress("0x2D567EcE699Eabe5afCd141eDB7A4f2D0D6ce8a0"),
				L2SystemConfigAddress:           common.HexToAddress("0xF444cF06A3E3724e20B35c2989d3942ea8b59124"),
			},
			GenesisStateRoot:          &ScrollSepoliaGenesisState,
			MissingHeaderFieldsSHA256: &ScrollSepoliaMissingHeaderFieldsSHA256,
		},
	}

	ScrollMainnetChainConfig = &ChainConfig{
		ChainID:             big.NewInt(534352),
		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:    nil,
		BerlinBlock:         big.NewInt(0),
		LondonBlock:         big.NewInt(0),
		ArrowGlacierBlock:   nil,
		ArchimedesBlock:     big.NewInt(0),
		ShanghaiBlock:       big.NewInt(0),
		BernoulliBlock:      big.NewInt(5220340),
		CurieBlock:          big.NewInt(7096836),
		DarwinTime:          newUint64(1724227200),
		DarwinV2Time:        newUint64(1725264000),
		EuclidTime:          newUint64(1744815600),
		EuclidV2Time:        newUint64(1745305200),
		FeynmanTime:         nil,
		Clique: &CliqueConfig{
			Period: 3,
			Epoch:  30000,
		},
		SystemContract: &SystemContractConfig{
			Period:                3,
			SystemContractAddress: common.HexToAddress("0x8432728A257646449245558B8b7Dbe51A16c7a4D"),
			SystemContractSlot:    common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000067"),
		},
		Scroll: ScrollConfig{
			UseZktrie:                 true,
			MaxTxPerBlock:             &ScrollMaxTxPerBlock,
			MaxTxPayloadBytesPerBlock: &ScrollMaxTxPayloadBytesPerBlock,
			FeeVaultAddress:           &rcfg.ScrollFeeVaultAddress,
			L1Config: &L1Config{
				L1ChainId:                       1,
				L1MessageQueueAddress:           common.HexToAddress("0x0d7E906BD9cAFa154b048cFa766Cc1E54E39AF9B"),
				L1MessageQueueV2Address:         common.HexToAddress("0x56971da63A3C0205184FEF096E9ddFc7A8C2D18a"),
				L1MessageQueueV2DeploymentBlock: 22088276,
				NumL1MessagesPerBlock:           10,
				ScrollChainAddress:              common.HexToAddress("0xa13BAF47339d63B743e7Da8741db5456DAc1E556"),
				L2SystemConfigAddress:           common.HexToAddress("0x331A873a2a85219863d80d248F9e2978fE88D0Ea"),
			},
			GenesisStateRoot:          &ScrollMainnetGenesisState,
			MissingHeaderFieldsSHA256: &ScrollMainnetMissingHeaderFieldsSHA256,
		},
	}

	// AllEthashProtocolChanges contains every protocol change (EIPs) introduced
	// and accepted by the Ethereum core developers into the Ethash consensus.
	//
	// This configuration is intentionally not using keyed fields to force anyone
	// adding flags to the config to also have to set these fields.
	AllEthashProtocolChanges = &ChainConfig{
		ChainID:                 big.NewInt(1337),
		HomesteadBlock:          big.NewInt(0),
		DAOForkBlock:            nil,
		DAOForkSupport:          false,
		EIP150Block:             big.NewInt(0),
		EIP150Hash:              common.Hash{},
		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),
		ArchimedesBlock:         big.NewInt(0),
		ShanghaiBlock:           big.NewInt(0),
		BernoulliBlock:          big.NewInt(0),
		CurieBlock:              big.NewInt(0),
		DarwinTime:              new(uint64),
		DarwinV2Time:            new(uint64),
		TerminalTotalDifficulty: nil,
		Ethash:                  new(EthashConfig),
		Clique:                  nil,
		Scroll: ScrollConfig{
			UseZktrie:                 false,
			FeeVaultAddress:           nil,
			MaxTxPerBlock:             nil,
			MaxTxPayloadBytesPerBlock: nil,
			L1Config: &L1Config{
				L1ChainId:             5,
				L1MessageQueueAddress: common.HexToAddress("0x0000000000000000000000000000000000000000"),
				NumL1MessagesPerBlock: 0,
				ScrollChainAddress:    common.HexToAddress("0x0000000000000000000000000000000000000000"),
			},
		}}

	// AllCliqueProtocolChanges contains every protocol change (EIPs) introduced
	// and accepted by the Ethereum core developers into the Clique consensus.
	//
	// This configuration is intentionally not using keyed fields to force anyone
	// adding flags to the config to also have to set these fields.
	AllCliqueProtocolChanges = &ChainConfig{
		ChainID:                 big.NewInt(1337),
		HomesteadBlock:          big.NewInt(0),
		DAOForkBlock:            nil,
		DAOForkSupport:          false,
		EIP150Block:             big.NewInt(0),
		EIP150Hash:              common.Hash{},
		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),
		ArchimedesBlock:         big.NewInt(0),
		ShanghaiBlock:           big.NewInt(0),
		BernoulliBlock:          big.NewInt(0),
		CurieBlock:              big.NewInt(0),
		DarwinTime:              new(uint64),
		DarwinV2Time:            new(uint64),
		TerminalTotalDifficulty: nil,
		Ethash:                  nil,
		Clique:                  &CliqueConfig{Period: 0, Epoch: 30000},
		Scroll: ScrollConfig{
			UseZktrie:                 false,
			FeeVaultAddress:           nil,
			MaxTxPerBlock:             nil,
			MaxTxPayloadBytesPerBlock: nil,
			L1Config: &L1Config{
				L1ChainId:             5,
				L1MessageQueueAddress: common.HexToAddress("0x0000000000000000000000000000000000000000"),
				NumL1MessagesPerBlock: 0,
				ScrollChainAddress:    common.HexToAddress("0x0000000000000000000000000000000000000000"),
			},
		}}

	TestChainConfig = &ChainConfig{
		ChainID:                 big.NewInt(1),
		HomesteadBlock:          big.NewInt(0),
		DAOForkBlock:            nil,
		DAOForkSupport:          false,
		EIP150Block:             big.NewInt(0),
		EIP150Hash:              common.Hash{},
		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),
		ArchimedesBlock:         big.NewInt(0),
		ShanghaiBlock:           big.NewInt(0),
		BernoulliBlock:          big.NewInt(0),
		CurieBlock:              big.NewInt(0),
		DarwinTime:              new(uint64),
		DarwinV2Time:            new(uint64),
		EuclidTime:              new(uint64),
		EuclidV2Time:            new(uint64),
		FeynmanTime:             new(uint64),
		TerminalTotalDifficulty: nil,
		Ethash:                  new(EthashConfig),
		Clique:                  nil,
		Scroll: ScrollConfig{
			UseZktrie:                 false,
			FeeVaultAddress:           &common.Address{123},
			MaxTxPerBlock:             nil,
			MaxTxPayloadBytesPerBlock: nil,
			L1Config: &L1Config{
				L1ChainId:             5,
				L1MessageQueueAddress: common.HexToAddress("0x0000000000000000000000000000000000000000"),
				NumL1MessagesPerBlock: 0,
				ScrollChainAddress:    common.HexToAddress("0x0000000000000000000000000000000000000000"),
			},
		}}
	TestRules = TestChainConfig.Rules(new(big.Int), 0)

	TestNoL1DataFeeChainConfig = &ChainConfig{
		ChainID:                 big.NewInt(1),
		HomesteadBlock:          big.NewInt(0),
		DAOForkBlock:            nil,
		DAOForkSupport:          false,
		EIP150Block:             big.NewInt(0),
		EIP150Hash:              common.Hash{},
		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),
		ArchimedesBlock:         big.NewInt(0),
		ShanghaiBlock:           big.NewInt(0),
		BernoulliBlock:          big.NewInt(0),
		CurieBlock:              big.NewInt(0),
		DarwinTime:              new(uint64),
		DarwinV2Time:            new(uint64),
		TerminalTotalDifficulty: nil,
		Ethash:                  new(EthashConfig),
		Clique:                  nil,
		Scroll: ScrollConfig{
			UseZktrie:                 false,
			FeeVaultAddress:           nil,
			MaxTxPerBlock:             nil,
			MaxTxPayloadBytesPerBlock: nil,
			L1Config: &L1Config{
				L1ChainId:             5,
				L1MessageQueueAddress: common.HexToAddress("0x0000000000000000000000000000000000000000"),
				NumL1MessagesPerBlock: 0,
				ScrollChainAddress:    common.HexToAddress("0x0000000000000000000000000000000000000000"),
			},
		}}
)

// TrustedCheckpoint represents a set of post-processed trie roots (CHT and
// BloomTrie) associated with the appropriate section index and head hash. It is
// used to start light syncing from this checkpoint and avoid downloading the
// entire header chain while still being able to securely access old headers/logs.
type TrustedCheckpoint struct {
	SectionIndex uint64      `json:"sectionIndex"`
	SectionHead  common.Hash `json:"sectionHead"`
	CHTRoot      common.Hash `json:"chtRoot"`
	BloomRoot    common.Hash `json:"bloomRoot"`
}

// HashEqual returns an indicator comparing the itself hash with given one.
func (c *TrustedCheckpoint) HashEqual(hash common.Hash) bool {
	if c.Empty() {
		return hash == common.Hash{}
	}
	return c.Hash() == hash
}

// Hash returns the hash of checkpoint's four key fields(index, sectionHead, chtRoot and bloomTrieRoot).
func (c *TrustedCheckpoint) Hash() common.Hash {
	var sectionIndex [8]byte
	binary.BigEndian.PutUint64(sectionIndex[:], c.SectionIndex)

	w := sha3.NewLegacyKeccak256()
	w.Write(sectionIndex[:])
	w.Write(c.SectionHead[:])
	w.Write(c.CHTRoot[:])
	w.Write(c.BloomRoot[:])

	var h common.Hash
	w.Sum(h[:0])
	return h
}

// Empty returns an indicator whether the checkpoint is regarded as empty.
func (c *TrustedCheckpoint) Empty() bool {
	return c.SectionHead == (common.Hash{}) || c.CHTRoot == (common.Hash{}) || c.BloomRoot == (common.Hash{})
}

// CheckpointOracleConfig represents a set of checkpoint contract(which acts as an oracle)
// config which used for light client checkpoint syncing.
type CheckpointOracleConfig struct {
	Address   common.Address   `json:"address"`
	Signers   []common.Address `json:"signers"`
	Threshold uint64           `json:"threshold"`
}

// 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)
	EIP150Hash  common.Hash `json:"eip150Hash,omitempty"`  // EIP150 HF hash (needed for header only clients as only gas pricing changed)

	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)
	ArchimedesBlock     *big.Int `json:"archimedesBlock,omitempty"`     // Archimedes switch block (nil = no fork, 0 = already on archimedes)
	ShanghaiBlock       *big.Int `json:"shanghaiBlock,omitempty"`       // Shanghai switch block (nil = no fork, 0 = already on shanghai)
	BernoulliBlock      *big.Int `json:"bernoulliBlock,omitempty"`      // Bernoulli switch block (nil = no fork, 0 = already on bernoulli)
	CurieBlock          *big.Int `json:"curieBlock,omitempty"`          // Curie switch block (nil = no fork, 0 = already on curie)
	DarwinTime          *uint64  `json:"darwinTime,omitempty"`          // Darwin switch time (nil = no fork, 0 = already on darwin)
	DarwinV2Time        *uint64  `json:"darwinv2Time,omitempty"`        // DarwinV2 switch time (nil = no fork, 0 = already on darwinv2)
	EuclidTime          *uint64  `json:"euclidTime,omitempty"`          // Euclid switch time (nil = no fork, 0 = already on euclid)
	EuclidV2Time        *uint64  `json:"euclidv2Time,omitempty"`        // EuclidV2 switch time (nil = no fork, 0 = already on euclidv2)
	FeynmanTime         *uint64  `json:"feynmanTime,omitempty"`         // Feynman switch time (nil = no fork, 0 = already on feynman)

	// TerminalTotalDifficulty is the amount of total difficulty reached by
	// the network that triggers the consensus upgrade.
	TerminalTotalDifficulty *big.Int `json:"terminalTotalDifficulty,omitempty"`

	// Various consensus engines
	Ethash         *EthashConfig         `json:"ethash,omitempty"`
	Clique         *CliqueConfig         `json:"clique,omitempty"`
	SystemContract *SystemContractConfig `json:"systemContract,omitempty"`

	// Scroll genesis extension: enable scroll rollup-related traces & state transition
	Scroll ScrollConfig `json:"scroll,omitempty"`
}

func (c *ChainConfig) Clone() *ChainConfig {
	var clone ChainConfig
	j, err := json.Marshal(c)
	if err != nil {
		panic(err)
	}
	if err = json.Unmarshal(j, &clone); err != nil {
		panic(err)
	}
	return &clone
}

type ScrollConfig struct {
	// Use zktrie [optional]
	UseZktrie bool `json:"useZktrie,omitempty"`

	// Maximum number of transactions per block [optional]
	MaxTxPerBlock *int `json:"maxTxPerBlock,omitempty"`

	// Maximum tx payload size of blocks that we produce [optional]
	MaxTxPayloadBytesPerBlock *int `json:"maxTxPayloadBytesPerBlock,omitempty"`

	// Transaction fee vault address [optional]
	FeeVaultAddress *common.Address `json:"feeVaultAddress,omitempty"`

	// L1 config
	L1Config *L1Config `json:"l1Config,omitempty"`

	// Genesis State Root for MPT clients
	GenesisStateRoot *common.Hash `json:"genesisStateRoot,omitempty"`

	// MissingHeaderFieldsSHA256 is the SHA256 hash of the missing header fields file.
	MissingHeaderFieldsSHA256 *common.Hash `json:"missingHeaderFieldsSHA256,omitempty"`
}

// L1Config contains the l1 parameters needed to sync l1 contract events (e.g., l1 messages, commit/revert/finalize batches) in the sequencer
type L1Config struct {
	L1ChainId                       uint64         `json:"l1ChainId,string,omitempty"`
	L1MessageQueueAddress           common.Address `json:"l1MessageQueueAddress,omitempty"`
	L1MessageQueueV2Address         common.Address `json:"l1MessageQueueV2Address,omitempty"`
	L1MessageQueueV2DeploymentBlock uint64         `json:"l1MessageQueueV2DeploymentBlock,omitempty"`
	NumL1MessagesPerBlock           uint64         `json:"numL1MessagesPerBlock,string,omitempty"`
	ScrollChainAddress              common.Address `json:"scrollChainAddress,omitempty"`
	L2SystemConfigAddress           common.Address `json:"l2SystemConfigAddress,omitempty"`
}

func (c *L1Config) String() string {
	if c == nil {
		return "<nil>"
	}

	return fmt.Sprintf("{l1ChainId: %v, l1MessageQueueAddress: %v, l1MessageQueueV2Address: %v, l1MessageQueueV2DeploymentBlock: %v, numL1MessagesPerBlock: %v, ScrollChainAddress: %v, L2SystemConfigAddress: %v}",
		c.L1ChainId, c.L1MessageQueueAddress.Hex(), c.L1MessageQueueV2Address.Hex(), c.L1MessageQueueV2DeploymentBlock, c.NumL1MessagesPerBlock, c.ScrollChainAddress.Hex(), c.L2SystemConfigAddress.Hex())
}

func (s ScrollConfig) FeeVaultEnabled() bool {
	return s.FeeVaultAddress != nil
}

func (s ScrollConfig) ZktrieEnabled() bool {
	return s.UseZktrie
}

func (s ScrollConfig) ShouldIncludeL1Messages() bool {
	return s.L1Config != nil && s.L1Config.NumL1MessagesPerBlock > 0
}

func (s ScrollConfig) String() string {
	maxTxPerBlock := "<nil>"
	if s.MaxTxPerBlock != nil {
		maxTxPerBlock = fmt.Sprintf("%v", *s.MaxTxPerBlock)
	}

	maxTxPayloadBytesPerBlock := "<nil>"
	if s.MaxTxPayloadBytesPerBlock != nil {
		maxTxPayloadBytesPerBlock = fmt.Sprintf("%v", *s.MaxTxPayloadBytesPerBlock)
	}

	genesisStateRoot := "<nil>"
	if s.GenesisStateRoot != nil {
		genesisStateRoot = fmt.Sprintf("%v", *s.GenesisStateRoot)
	}

	missingHeaderFieldsSHA256 := "<nil>"
	if s.MissingHeaderFieldsSHA256 != nil {
		missingHeaderFieldsSHA256 = fmt.Sprintf("%v", *s.MissingHeaderFieldsSHA256)
	}

	return fmt.Sprintf("{useZktrie: %v, maxTxPerBlock: %v, MaxTxPayloadBytesPerBlock: %v, feeVaultAddress: %v, l1Config: %v, genesisStateRoot: %v, missingHeaderFieldsSHA256: %v}",
		s.UseZktrie, maxTxPerBlock, maxTxPayloadBytesPerBlock, s.FeeVaultAddress, s.L1Config.String(), genesisStateRoot, missingHeaderFieldsSHA256)
}

// IsValidTxCount returns whether the given block's transaction count is below the limit.
// This limit corresponds to the number of ECDSA signature checks that we can fit into the zkEVM.
func (s ScrollConfig) IsValidTxCount(count int) bool {
	return s.MaxTxPerBlock == nil || count <= *s.MaxTxPerBlock
}

// IsValidBlockSize returns whether the given block's transaction payload size is below the limit.
func (s ScrollConfig) IsValidBlockSize(size common.StorageSize) bool {
	return s.MaxTxPayloadBytesPerBlock == nil || size <= common.StorageSize(*s.MaxTxPayloadBytesPerBlock)
}

// IsValidBlockSizeForMining is similar to IsValidBlockSize, but it accounts for the confidence factor in Rust CCC
func (s ScrollConfig) IsValidBlockSizeForMining(size common.StorageSize) bool {
	return s.IsValidBlockSize(size * (1.0 / 0.95))
}

// L2SystemConfigAddress returns the configured l2 system config address, or the zero address if it is not configured.
func (s ScrollConfig) L2SystemConfigAddress() common.Address {
	if s.L1Config == nil {
		return common.Address{} // only in tests
	}
	return s.L1Config.L2SystemConfigAddress
}

// 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
	RelaxedPeriod    bool           `json:"relaxed_period"`     // Relaxes the period to be just an upper bound
	ShadowForkHeight uint64         `json:"shadow_fork_height"` // Allows shadow forking consensus layer at given height
	ShadowForkSigner common.Address `json:"shadow_fork_signer"` // Sets the address to be the authorized signer after the shadow fork
}

// String implements the stringer interface, returning the consensus engine details.
func (c *CliqueConfig) String() string {
	return "clique"
}

// SystemContractConfig is the consensus engine configs for rollup sequencer sealing.
type SystemContractConfig struct {
	Period uint64 `json:"period"` // Number of seconds between blocks to enforce

	SystemContractAddress common.Address `json:"system_contract_address"` // address of system contract on L1
	SystemContractSlot    common.Hash    `json:"system_contract_slot"`    // slot of signer address in system contract on L1

	RelaxedPeriod bool `json:"relaxed_period"` // Relaxes the period to be just an upper bound
}

// String implements the stringer interface, returning the consensus engine details.
func (c *SystemContractConfig) String() string {
	return "system_contract"
}

// 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 && c.SystemContract != nil:
		engine = "upgradable (clique + system_contract)"
	case c.Clique != nil:
		engine = c.Clique
	case c.SystemContract != nil:
		engine = c.SystemContract
	default:
		engine = "unknown"
	}
	darwinTime := "<nil>"
	if c.DarwinTime != nil {
		darwinTime = fmt.Sprintf("@%v", *c.DarwinTime)
	}
	darwinV2Time := "<nil>"
	if c.DarwinV2Time != nil {
		darwinV2Time = fmt.Sprintf("@%v", *c.DarwinV2Time)
	}
	euclidTime := "<nil>"
	if c.EuclidTime != nil {
		euclidTime = fmt.Sprintf("@%v", *c.EuclidTime)
	}
	euclidV2Time := "<nil>"
	if c.EuclidV2Time != nil {
		euclidV2Time = fmt.Sprintf("@%v", *c.EuclidV2Time)
	}
	feynmanTime := "<nil>"
	if c.FeynmanTime != nil {
		feynmanTime = fmt.Sprintf("@%v", *c.FeynmanTime)
	}
	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, Berlin: %v, London: %v, Arrow Glacier: %v, Archimedes: %v, Shanghai: %v, Bernoulli: %v, Curie: %v, Darwin: %v, DarwinV2: %v, Euclid: %v, EuclidV2: %v, Feynman: %v, Engine: %v, Scroll config: %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.BerlinBlock,
		c.LondonBlock,
		c.ArrowGlacierBlock,
		c.ArchimedesBlock,
		c.ShanghaiBlock,
		c.BernoulliBlock,
		c.CurieBlock,
		darwinTime,
		darwinV2Time,
		euclidTime,
		euclidV2Time,
		feynmanTime,
		engine,
		c.Scroll,
	)
}

// IsHomestead returns whether num is either equal to the homestead block or greater.
func (c *ChainConfig) IsHomestead(num *big.Int) bool {
	return isForked(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 isForked(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 isForked(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 isForked(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 isForked(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 isForked(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 isForked(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 isForked(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 isForked(c.PetersburgBlock, num) || c.PetersburgBlock == nil && isForked(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 isForked(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 isForked(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 isForked(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 isForked(c.ArrowGlacierBlock, num)
}

// IsArchimedes returns whether num is either equal to the Archimedes fork block or greater.
func (c *ChainConfig) IsArchimedes(num *big.Int) bool {
	return isForked(c.ArchimedesBlock, num)
}

// IsShanghai returns whether num is either equal to the Shanghai fork block or greater.
func (c *ChainConfig) IsShanghai(num *big.Int) bool {
	return isForked(c.ShanghaiBlock, num)
}

// IsBernoulli returns whether num is either equal to the Bernoulli fork block or greater.
func (c *ChainConfig) IsBernoulli(num *big.Int) bool {
	return isForked(c.BernoulliBlock, num)
}

// IsCurie returns whether num is either equal to the Curie fork block or greater.
func (c *ChainConfig) IsCurie(num *big.Int) bool {
	return isForked(c.CurieBlock, num)
}

// IsDarwin returns whether time is either equal to the Darwin fork time or greater.
func (c *ChainConfig) IsDarwin(now uint64) bool {
	return isForkedTime(now, c.DarwinTime)
}

// IsDarwinV2 returns whether time is either equal to the DarwinV2 fork time or greater.
func (c *ChainConfig) IsDarwinV2(now uint64) bool {
	return isForkedTime(now, c.DarwinV2Time)
}

// IsEuclid returns whether time is either equal to the Euclid fork time or greater.
func (c *ChainConfig) IsEuclid(now uint64) bool {
	return isForkedTime(now, c.EuclidTime)
}

// IsEuclidV2 returns whether time is either equal to the EuclidV2 fork time or greater.
func (c *ChainConfig) IsEuclidV2(now uint64) bool {
	return isForkedTime(now, c.EuclidV2Time)
}

// IsFeynman returns whether time is either equal to the Feynman fork time or greater.
func (c *ChainConfig) IsFeynman(now uint64) bool {
	return isForkedTime(now, c.FeynmanTime)
}

// IsFeynmanTransitionBlock returns whether the given block timestamp corresponds to the first Feynman block.
func (c *ChainConfig) IsFeynmanTransitionBlock(blockTimestamp uint64, parentTimestamp uint64) bool {
	return isForkedTime(blockTimestamp, c.FeynmanTime) && !isForkedTime(parentTimestamp, c.FeynmanTime)
}

// 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
}

// CheckCompatible checks whether scheduled fork transitions have been imported
// with a mismatching chain configuration.
func (c *ChainConfig) CheckCompatible(newcfg *ChainConfig, height uint64) *ConfigCompatError {
	bhead := new(big.Int).SetUint64(height)

	// Iterate checkCompatible to find the lowest conflict.
	var lasterr *ConfigCompatError
	for {
		err := c.checkCompatible(newcfg, bhead)
		if err == nil || (lasterr != nil && err.RewindTo == lasterr.RewindTo) {
			break
		}
		lasterr = err
		bhead.SetUint64(err.RewindTo)
	}
	return lasterr
}

// 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
}

// 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
		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: "archimedesBlock", block: c.ArchimedesBlock, optional: true},
		{name: "shanghaiBlock", block: c.ShanghaiBlock, optional: true},
		{name: "bernoulliBlock", block: c.BernoulliBlock, optional: true},
		{name: "curieBlock", block: c.CurieBlock, optional: true},
	} {
		if lastFork.name != "" {
			// Next one must be higher number
			if lastFork.block == nil && cur.block != nil {
				return fmt.Errorf("unsupported fork ordering: %v not enabled, but %v enabled at %v",
					lastFork.name, cur.name, cur.block)
			}
			if lastFork.block != nil && cur.block != nil {
				if lastFork.block.Cmp(cur.block) > 0 {
					return fmt.Errorf("unsupported fork ordering: %v enabled at %v, but %v enabled at %v",
						lastFork.name, lastFork.block, cur.name, cur.block)
				}
			}
		}
		// If it was optional and not set, then ignore it
		if !cur.optional || cur.block != nil {
			lastFork = cur
		}
	}
	return nil
}

func (c *ChainConfig) checkCompatible(newcfg *ChainConfig, head *big.Int) *ConfigCompatError {
	if isForkIncompatible(c.HomesteadBlock, newcfg.HomesteadBlock, head) {
		return newCompatError("Homestead fork block", c.HomesteadBlock, newcfg.HomesteadBlock)
	}
	if isForkIncompatible(c.DAOForkBlock, newcfg.DAOForkBlock, head) {
		return newCompatError("DAO fork block", c.DAOForkBlock, newcfg.DAOForkBlock)
	}
	if c.IsDAOFork(head) && c.DAOForkSupport != newcfg.DAOForkSupport {
		return newCompatError("DAO fork support flag", c.DAOForkBlock, newcfg.DAOForkBlock)
	}
	if isForkIncompatible(c.EIP150Block, newcfg.EIP150Block, head) {
		return newCompatError("EIP150 fork block", c.EIP150Block, newcfg.EIP150Block)
	}
	if isForkIncompatible(c.EIP155Block, newcfg.EIP155Block, head) {
		return newCompatError("EIP155 fork block", c.EIP155Block, newcfg.EIP155Block)
	}
	if isForkIncompatible(c.EIP158Block, newcfg.EIP158Block, head) {
		return newCompatError("EIP158 fork block", c.EIP158Block, newcfg.EIP158Block)
	}
	if c.IsEIP158(head) && !configNumEqual(c.ChainID, newcfg.ChainID) {
		return newCompatError("EIP158 chain ID", c.EIP158Block, newcfg.EIP158Block)
	}
	if isForkIncompatible(c.ByzantiumBlock, newcfg.ByzantiumBlock, head) {
		return newCompatError("Byzantium fork block", c.ByzantiumBlock, newcfg.ByzantiumBlock)
	}
	if isForkIncompatible(c.ConstantinopleBlock, newcfg.ConstantinopleBlock, head) {
		return newCompatError("Constantinople fork block", c.ConstantinopleBlock, newcfg.ConstantinopleBlock)
	}
	if isForkIncompatible(c.PetersburgBlock, newcfg.PetersburgBlock, head) {
		// 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 isForkIncompatible(c.ConstantinopleBlock, newcfg.PetersburgBlock, head) {
			return newCompatError("Petersburg fork block", c.PetersburgBlock, newcfg.PetersburgBlock)
		}
	}
	if isForkIncompatible(c.IstanbulBlock, newcfg.IstanbulBlock, head) {
		return newCompatError("Istanbul fork block", c.IstanbulBlock, newcfg.IstanbulBlock)
	}
	if isForkIncompatible(c.MuirGlacierBlock, newcfg.MuirGlacierBlock, head) {
		return newCompatError("Muir Glacier fork block", c.MuirGlacierBlock, newcfg.MuirGlacierBlock)
	}
	if isForkIncompatible(c.BerlinBlock, newcfg.BerlinBlock, head) {
		return newCompatError("Berlin fork block", c.BerlinBlock, newcfg.BerlinBlock)
	}
	if isForkIncompatible(c.LondonBlock, newcfg.LondonBlock, head) {
		return newCompatError("London fork block", c.LondonBlock, newcfg.LondonBlock)
	}
	if isForkIncompatible(c.ArrowGlacierBlock, newcfg.ArrowGlacierBlock, head) {
		return newCompatError("Arrow Glacier fork block", c.ArrowGlacierBlock, newcfg.ArrowGlacierBlock)
	}
	if isForkIncompatible(c.ArchimedesBlock, newcfg.ArchimedesBlock, head) {
		return newCompatError("Archimedes fork block", c.ArchimedesBlock, newcfg.ArchimedesBlock)
	}
	if isForkIncompatible(c.ShanghaiBlock, newcfg.ShanghaiBlock, head) {
		return newCompatError("Shanghai fork block", c.ShanghaiBlock, newcfg.ShanghaiBlock)
	}
	if isForkIncompatible(c.BernoulliBlock, newcfg.BernoulliBlock, head) {
		return newCompatError("Bernoulli fork block", c.BernoulliBlock, newcfg.BernoulliBlock)
	}
	if isForkIncompatible(c.CurieBlock, newcfg.CurieBlock, head) {
		return newCompatError("Curie fork block", c.CurieBlock, newcfg.CurieBlock)
	}
	return nil
}

// isForkIncompatible returns true if a fork scheduled at s1 cannot be rescheduled to
// block s2 because head is already past the fork.
func isForkIncompatible(s1, s2, head *big.Int) bool {
	return (isForked(s1, head) || isForked(s2, head)) && !configNumEqual(s1, s2)
}

// isForked returns whether a fork scheduled at block s is active at the given head block.
func isForked(s, head *big.Int) bool {
	if s == nil || head == nil {
		return false
	}
	return s.Cmp(head) <= 0
}

func isForkedTime(now uint64, forkTime *uint64) bool {
	if forkTime == nil {
		return false
	}
	return now >= *forkTime
}

func configNumEqual(x, y *big.Int) bool {
	if x == nil {
		return y == nil
	}
	if y == nil {
		return x == nil
	}
	return x.Cmp(y) == 0
}

// 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
	StoredConfig, NewConfig *big.Int
	// the block number to which the local chain must be rewound to correct the error
	RewindTo uint64
}

func newCompatError(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, storedblock, newblock, 0}
	if rew != nil && rew.Sign() > 0 {
		err.RewindTo = rew.Uint64() - 1
	}
	return err
}

func (err *ConfigCompatError) Error() string {
	return fmt.Sprintf("mismatching %s in database (have %d, want %d, rewindto %d)", err.What, err.StoredConfig, err.NewConfig, err.RewindTo)
}

// 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, IsArchimedes, IsShanghai            bool
	IsBernoulli, IsCurie, IsDarwin, IsEuclid, IsEuclidV2    bool
	IsFeynman                                               bool
}

// Rules ensures c's ChainID is not nil.
func (c *ChainConfig) Rules(num *big.Int, time 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),
		IsArchimedes:     c.IsArchimedes(num),
		IsShanghai:       c.IsShanghai(num),
		IsBernoulli:      c.IsBernoulli(num),
		IsCurie:          c.IsCurie(num),
		IsDarwin:         c.IsDarwin(time),
		IsEuclid:         c.IsEuclid(time),
		IsEuclidV2:       c.IsEuclidV2(time),
		IsFeynman:        c.IsFeynman(time),
	}
}