github.com/beyonderyue/gochain@v2.2.26+incompatible/params/protocol_params.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package params
    18  
    19  var (
    20  	// The artificial target gas limit.
    21  	TargetGasLimit uint64 = TargetTxsPerSec * DefaultCliquePeriod * TxGas
    22  )
    23  
    24  const (
    25  	DefaultCliquePeriod = 5
    26  	DefaultCliqueEpoch  = 3000
    27  
    28  	TargetTxsPerSec = 1300
    29  
    30  	GasLimitBoundDivisor uint64 = 1024      // The bound divisor of the gas limit, used in update calculations.
    31  	MinGasLimit          uint64 = 5000      // Minimum the gas limit may ever be.
    32  	GenesisGasLimit      uint64 = 210284448 // Gas limit of the Genesis block.
    33  
    34  	MaximumExtraDataSize  uint64 = 32    // Maximum size extra data may be after Genesis.
    35  	ExpByteGas            uint64 = 10    // Times ceil(log256(exponent)) for the EXP instruction.
    36  	SloadGas              uint64 = 50    // Multiplied by the number of 32-byte words that are copied (round up) for any *COPY operation and added.
    37  	CallValueTransferGas  uint64 = 9000  // Paid for CALL when the value transfer is non-zero.
    38  	CallNewAccountGas     uint64 = 25000 // Paid for CALL when the destination address didn't exist prior.
    39  	TxGas                 uint64 = 21000 // Per transaction not creating a contract. NOTE: Not payable on data of calls between transactions.
    40  	TxGasContractCreation uint64 = 53000 // Per transaction that creates a contract. NOTE: Not payable on data of calls between transactions.
    41  	TxDataZeroGas         uint64 = 4     // Per byte of data attached to a transaction that equals zero. NOTE: Not payable on data of calls between transactions.
    42  	QuadCoeffDiv          uint64 = 512   // Divisor for the quadratic particle of the memory cost equation.
    43  	LogDataGas            uint64 = 8     // Per byte in a LOG* operation's data.
    44  	CallStipend           uint64 = 2300  // Free gas given at beginning of call.
    45  
    46  	Sha3Gas     uint64 = 30 // Once per SHA3 operation.
    47  	Sha3WordGas uint64 = 6  // Once per word of the SHA3 operation's data.
    48  
    49  	SstoreSetGas    uint64 = 20000 // Once per SLOAD operation.
    50  	SstoreResetGas  uint64 = 5000  // Once per SSTORE operation if the zeroness changes from zero.
    51  	SstoreClearGas  uint64 = 5000  // Once per SSTORE operation if the zeroness doesn't change.
    52  	SstoreRefundGas uint64 = 15000 // Once per SSTORE operation if the zeroness changes to zero.
    53  
    54  	NetSstoreNoopGas  uint64 = 200   // Once per SSTORE operation if the value doesn't change.
    55  	NetSstoreInitGas  uint64 = 20000 // Once per SSTORE operation from clean zero.
    56  	NetSstoreCleanGas uint64 = 5000  // Once per SSTORE operation from clean non-zero.
    57  	NetSstoreDirtyGas uint64 = 200   // Once per SSTORE operation from dirty.
    58  
    59  	NetSstoreClearRefund      uint64 = 15000 // Once per SSTORE operation for clearing an originally existing storage slot
    60  	NetSstoreResetRefund      uint64 = 4800  // Once per SSTORE operation for resetting to the original non-zero value
    61  	NetSstoreResetClearRefund uint64 = 19800 // Once per SSTORE operation for resetting to the original zero value
    62  
    63  	JumpdestGas      uint64 = 1     // Refunded gas, once per SSTORE operation if the zeroness changes to zero.
    64  	EpochDuration    uint64 = 30000 // Duration between proof-of-work epochs.
    65  	CallGas          uint64 = 40    // Once per CALL operation & message call transaction.
    66  	CreateDataGas    uint64 = 200   //
    67  	CallCreateDepth  uint64 = 1024  // Maximum depth of call/create stack.
    68  	ExpGas           uint64 = 10    // Once per EXP instruction
    69  	LogGas           uint64 = 375   // Per LOG* operation.
    70  	CopyGas          uint64 = 3     //
    71  	StackLimit       uint64 = 1024  // Maximum size of VM stack allowed.
    72  	TierStepGas      uint64 = 0     // Once per operation, for a selection of them.
    73  	LogTopicGas      uint64 = 375   // Multiplied by the * of the LOG*, per LOG transaction. e.g. LOG0 incurs 0 * c_txLogTopicGas, LOG4 incurs 4 * c_txLogTopicGas.
    74  	CreateGas        uint64 = 32000 // Once per CREATE operation & contract-creation transaction.
    75  	Create2Gas       uint64 = 32000 // Once per CREATE2 operation
    76  	SuicideRefundGas uint64 = 24000 // Refunded following a suicide operation.
    77  	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.
    78  	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.
    79  
    80  	MaxCodeSize = 24576 // Maximum bytecode to permit for a contract
    81  
    82  	// Precompiled contract gas prices
    83  
    84  	EcrecoverGas            uint64 = 3000   // Elliptic curve sender recovery gas price
    85  	Sha256BaseGas           uint64 = 60     // Base price for a SHA256 operation
    86  	Sha256PerWordGas        uint64 = 12     // Per-word price for a SHA256 operation
    87  	Ripemd160BaseGas        uint64 = 600    // Base price for a RIPEMD160 operation
    88  	Ripemd160PerWordGas     uint64 = 120    // Per-word price for a RIPEMD160 operation
    89  	IdentityBaseGas         uint64 = 15     // Base price for a data copy operation
    90  	IdentityPerWordGas      uint64 = 3      // Per-work price for a data copy operation
    91  	ModExpQuadCoeffDiv      uint64 = 20     // Divisor for the quadratic particle of the big int modular exponentiation
    92  	Bn256AddGas             uint64 = 500    // Gas needed for an elliptic curve addition
    93  	Bn256ScalarMulGas       uint64 = 40000  // Gas needed for an elliptic curve scalar multiplication
    94  	Bn256PairingBaseGas     uint64 = 100000 // Base price for an elliptic curve pairing check
    95  	Bn256PairingPerPointGas uint64 = 80000  // Per-point price for an elliptic curve pairing check
    96  )
    97  
    98  func DefaultCliqueConfig() *CliqueConfig {
    99  	return &CliqueConfig{Epoch: DefaultCliqueEpoch, Period: DefaultCliquePeriod}
   100  }