// Copyright Fuzamei Corp. 2018 All Rights Reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//nolint:unparam // 忽视本文件所有golangci-linter检查
package params

import "math/big"

const (
	//GasLimitBoundDivisor uint64 = 1024    // The bound divisor of the gas limit, used in update calculations.
	//MinGasLimit          uint64 = 5000    // Minimum the gas limit may ever be.
	//GenesisGasLimit      uint64 = 4712388 // Gas limit of the Genesis block.
	//
	//MaximumExtraDataSize  uint64 = 32    // Maximum size extra data may be after Genesis.
	//ExpByteGas            uint64 = 10    // Times ceil(log256(exponent)) for the EXP instruction.
	//SloadGas              uint64 = 50    // Multiplied by the number of 32-byte words that are copied (round up) for any *COPY operation and added.

	CallValueTransferGas uint64 = 9000  // Paid for CALL when the value transfer is non-zero.
	CallNewAccountGas    uint64 = 25000 // Paid for CALL when the destination address didn't exist prior.
	TxGas                uint64 = 21000 // Per transaction not creating a contract. NOTE: Not payable on data of calls between transactions.
	//TxGasContractCreation uint64 = 53000 // Per transaction that creates a contract. NOTE: Not payable on data of calls between transactions.
	//TxDataZeroGas         uint64 = 4     // Per byte of data attached to a transaction that equals zero. NOTE: Not payable on data of calls between transactions.

	QuadCoeffDiv uint64 = 512  // Divisor for the quadratic particle of the memory cost equation.
	LogDataGas   uint64 = 8    // Per byte in a LOG* operation's data.
	CallStipend  uint64 = 2300 // Free gas given at beginning of call.

	Sha3Gas     uint64 = 30 // Once per SHA3 operation.
	Sha3WordGas uint64 = 6  // Once per word of the SHA3 operation's data.

	SstoreSetGas    uint64 = 20000 // Once per SLOAD operation.
	SstoreResetGas  uint64 = 5000  // Once per SSTORE operation if the zeroness changes from zero.
	SstoreClearGas  uint64 = 5000  // Once per SSTORE operation if the zeroness doesn't change.
	SstoreRefundGas uint64 = 15000 // Once per SSTORE operation if the zeroness changes to zero.

	//NetSstoreNoopGas  uint64 = 200   // Once per SSTORE operation if the value doesn't change.
	//NetSstoreInitGas  uint64 = 20000 // Once per SSTORE operation from clean zero.
	//NetSstoreCleanGas uint64 = 5000  // Once per SSTORE operation from clean non-zero.
	//NetSstoreDirtyGas uint64 = 200   // Once per SSTORE operation from dirty.
	//
	//NetSstoreClearRefund      uint64 = 15000 // Once per SSTORE operation for clearing an originally existing storage slot
	//NetSstoreResetRefund      uint64 = 4800  // Once per SSTORE operation for resetting to the original non-zero value
	//NetSstoreResetClearRefund uint64 = 19800 // Once per SSTORE operation for resetting to the original zero value
	//
	//SstoreSentryGasEIP2200   uint64 = 2300  // Minimum gas required to be present for an SSTORE call, not consumed
	//SstoreNoopGasEIP2200     uint64 = 800   // Once per SSTORE operation if the value doesn't change.
	//SstoreDirtyGasEIP2200    uint64 = 800   // Once per SSTORE operation if a dirty value is changed.
	//SstoreInitGasEIP2200     uint64 = 20000 // Once per SSTORE operation from clean zero to non-zero
	//SstoreInitRefundEIP2200  uint64 = 19200 // Once per SSTORE operation for resetting to the original zero value
	//SstoreCleanGasEIP2200    uint64 = 5000  // Once per SSTORE operation from clean non-zero to something else
	//SstoreCleanRefundEIP2200 uint64 = 4200  // Once per SSTORE operation for resetting to the original non-zero value
	//SstoreClearRefundEIP2200 uint64 = 15000 // Once per SSTORE operation for clearing an originally existing storage slot

	JumpdestGas uint64 = 1 // Once per JUMPDEST operation.
	//EpochDuration uint64 = 30000 // Duration between proof-of-work epochs.

	CreateDataGas   uint64 = 200  //
	CallCreateDepth uint64 = 1024 // Maximum depth of call/create stack.
	//ExpGas                   uint64 = 10    // Once per EXP instruction

	LogGas     uint64 = 375  // Per LOG* operation.
	CopyGas    uint64 = 3    //
	StackLimit uint64 = 1024 // Maximum size of VM stack allowed.
	//TierStepGas              uint64 = 0     // Once per operation, for a selection of them.
	LogTopicGas uint64 = 375   // Multiplied by the * of the LOG*, per LOG transaction. e.g. LOG0 incurs 0 * c_txLogTopicGas, LOG4 incurs 4 * c_txLogTopicGas.
	CreateGas   uint64 = 32000 // Once per CREATE operation & contract-creation transaction.
	//Create2Gas               uint64 = 32000 // Once per CREATE2 operation
	SelfdestructRefundGas uint64 = 24000 // Refunded following a selfdestruct operation.
	MemoryGas             uint64 = 3     // Times the address of the (highest referenced byte in memory + 1). NOTE: referencing happens on read, write and in instructions such as RETURN and CALL.
	//TxDataNonZeroGasFrontier uint64 = 68    // Per byte of data attached to a transaction that is not equal to zero. NOTE: Not payable on data of calls between transactions.
	//TxDataNonZeroGasEIP2028  uint64 = 16    // Per byte of non zero data attached to a transaction after EIP 2028 (part in Istanbul)
	//
	//// These have been changed during the course of the chain
	//CallGasFrontier              uint64 = 40  // Once per CALL operation & message call transaction.
	//CallGasEIP150                uint64 = 700 // Static portion of gas for CALL-derivates after EIP 150 (Tangerine)
	//BalanceGasFrontier           uint64 = 20  // The cost of a BALANCE operation
	//BalanceGasEIP150             uint64 = 400 // The cost of a BALANCE operation after Tangerine
	//BalanceGasEIP1884            uint64 = 700 // The cost of a BALANCE operation after EIP 1884 (part of Istanbul)
	//ExtcodeSizeGasFrontier       uint64 = 20  // Cost of EXTCODESIZE before EIP 150 (Tangerine)
	//ExtcodeSizeGasEIP150         uint64 = 700 // Cost of EXTCODESIZE after EIP 150 (Tangerine)
	//SloadGasFrontier             uint64 = 50
	//SloadGasEIP150               uint64 = 200
	//SloadGasEIP1884              uint64 = 800  // Cost of SLOAD after EIP 1884 (part of Istanbul)
	//SloadGasEIP2200              uint64 = 800  // Cost of SLOAD after EIP 2200 (part of Istanbul)
	ExtcodeHashGasConstantinople uint64 = 400 // Cost of EXTCODEHASH (introduced in Constantinople)
	//ExtcodeHashGasEIP1884        uint64 = 700  // Cost of EXTCODEHASH after EIP 1884 (part in Istanbul)
	//SelfdestructGasEIP150        uint64 = 5000 // Cost of SELFDESTRUCT post EIP 150 (Tangerine)
	//
	//// EXP has a dynamic portion depending on the size of the exponent
	//ExpByteFrontier uint64 = 10 // was set to 10 in Frontier
	//ExpByteEIP158   uint64 = 50 // was raised to 50 during Eip158 (Spurious Dragon)
	//
	//// Extcodecopy has a dynamic AND a static cost. This represents only the
	//// static portion of the gas. It was changed during EIP 150 (Tangerine)
	//ExtcodeCopyBaseFrontier uint64 = 20
	//ExtcodeCopyBaseEIP150   uint64 = 700
	//
	//// CreateBySelfdestructGas is used when the refunded account is one that does
	//// not exist. This logic is similar to call.
	//// Introduced in Tangerine Whistle (Eip 150)
	//CreateBySelfdestructGas uint64 = 25000

	MaxCodeSize = 24576 // Maximum bytecode to permit for a contract

	// Precompiled contract gas prices

	EcrecoverGas        uint64 = 3000 // Elliptic curve sender recovery gas price
	Sha256BaseGas       uint64 = 60   // Base price for a SHA256 operation
	Sha256PerWordGas    uint64 = 12   // Per-word price for a SHA256 operation
	Ripemd160BaseGas    uint64 = 600  // Base price for a RIPEMD160 operation
	Ripemd160PerWordGas uint64 = 120  // Per-word price for a RIPEMD160 operation
	IdentityBaseGas     uint64 = 15   // Base price for a data copy operation
	IdentityPerWordGas  uint64 = 3    // Per-work price for a data copy operation
	ModExpQuadCoeffDiv  uint64 = 20   // Divisor for the quadratic particle of the big int modular exponentiation

	Bn256AddGasByzantium             uint64 = 500    // Byzantium gas needed for an elliptic curve addition
	Bn256AddGasIstanbul              uint64 = 150    // Gas needed for an elliptic curve addition
	Bn256ScalarMulGasByzantium       uint64 = 40000  // Byzantium gas needed for an elliptic curve scalar multiplication
	Bn256ScalarMulGasIstanbul        uint64 = 6000   // Gas needed for an elliptic curve scalar multiplication
	Bn256PairingBaseGasByzantium     uint64 = 100000 // Byzantium base price for an elliptic curve pairing check
	Bn256PairingBaseGasIstanbul      uint64 = 45000  // Base price for an elliptic curve pairing check
	Bn256PairingPerPointGasByzantium uint64 = 80000  // Byzantium per-point price for an elliptic curve pairing check
	Bn256PairingPerPointGasIstanbul  uint64 = 34000  // Per-point price for an elliptic curve pairing check

	Bls12381G1AddGas          uint64 = 600    // Price for BLS12-381 elliptic curve G1 point addition
	Bls12381G1MulGas          uint64 = 12000  // Price for BLS12-381 elliptic curve G1 point scalar multiplication
	Bls12381G2AddGas          uint64 = 4500   // Price for BLS12-381 elliptic curve G2 point addition
	Bls12381G2MulGas          uint64 = 55000  // Price for BLS12-381 elliptic curve G2 point scalar multiplication
	Bls12381PairingBaseGas    uint64 = 115000 // Base gas price for BLS12-381 elliptic curve pairing check
	Bls12381PairingPerPairGas uint64 = 23000  // Per-point pair gas price for BLS12-381 elliptic curve pairing check
	Bls12381MapG1Gas          uint64 = 5500   // Gas price for BLS12-381 mapping field element to G1 operation
	Bls12381MapG2Gas          uint64 = 110000 // Gas price for BLS12-381 mapping field element to G2 operation
)

// Bls12381MultiExpDiscountTable Gas discount table for BLS12-381 G1 and G2 multi exponentiation operations
var Bls12381MultiExpDiscountTable = [128]uint64{1200, 888, 764, 641, 594, 547, 500, 453, 438, 423, 408, 394, 379, 364, 349, 334, 330, 326, 322, 318, 314, 310, 306, 302, 298, 294, 289, 285, 281, 277, 273, 269, 268, 266, 265, 263, 262, 260, 259, 257, 256, 254, 253, 251, 250, 248, 247, 245, 244, 242, 241, 239, 238, 236, 235, 233, 232, 231, 229, 228, 226, 225, 223, 222, 221, 220, 219, 219, 218, 217, 216, 216, 215, 214, 213, 213, 212, 211, 211, 210, 209, 208, 208, 207, 206, 205, 205, 204, 203, 202, 202, 201, 200, 199, 199, 198, 197, 196, 196, 195, 194, 193, 193, 192, 191, 191, 190, 189, 188, 188, 187, 186, 185, 185, 184, 183, 182, 182, 181, 180, 179, 179, 178, 177, 176, 176, 175, 174}

var (
	//  DifficultyBoundDivisor The bound divisor of the difficulty, used in the update calculations.
	DifficultyBoundDivisor = big.NewInt(2048)
	// GenesisDifficulty Difficulty of the Genesis block.
	GenesisDifficulty = big.NewInt(131072)
	// MinimumDifficulty The minimum that the difficulty may ever be.
	MinimumDifficulty = big.NewInt(131072)
	// DurationLimit The decision boundary on the blocktime duration used to determine whether difficulty should go up or not.
	DurationLimit = big.NewInt(13)
)
