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- // Copyright 2015 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 "math/big"
- var (
- TargetGasLimit uint64 = GenesisGasLimit // The artificial target
- )
- 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.
- SstoreSetGas uint64 = 20000 // Once per SLOAD operation.
- 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.
- 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.
- JumpdestGas uint64 = 1 // Refunded gas, once per SSTORE operation if the zeroness changes to zero.
- EpochDuration uint64 = 30000 // Duration between proof-of-work epochs.
- CallGas uint64 = 40 // Once per CALL operation & message call transaction.
- 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.
- SuicideRefundGas uint64 = 24000 // Refunded following a suicide 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.
- TxDataNonZeroGas 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.
- 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
- Bn256AddGas uint64 = 500 // Gas needed for an elliptic curve addition
- Bn256ScalarMulGas uint64 = 40000 // Gas needed for an elliptic curve scalar multiplication
- Bn256PairingBaseGas uint64 = 100000 // Base price for an elliptic curve pairing check
- Bn256PairingPerPointGas uint64 = 80000 // Per-point price for an elliptic curve pairing check
- )
- var (
- DifficultyBoundDivisor = big.NewInt(2048) // The bound divisor of the difficulty, used in the update calculations.
- GenesisDifficulty = big.NewInt(131072) // Difficulty of the Genesis block.
- MinimumDifficulty = big.NewInt(131072) // The minimum that the difficulty may ever be.
- DurationLimit = big.NewInt(13) // The decision boundary on the blocktime duration used to determine whether difficulty should go up or not.
- )
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