github.com/codingfuture/orig-energi3@v0.8.4/params/protocol_params.go (about) 1 // Copyright 2018 The Energi Core Authors 2 // Copyright 2015 The go-ethereum Authors 3 // This file is part of the Energi Core library. 4 // 5 // The Energi Core library is free software: you can redistribute it and/or modify 6 // it under the terms of the GNU Lesser General Public License as published by 7 // the Free Software Foundation, either version 3 of the License, or 8 // (at your option) any later version. 9 // 10 // The Energi Core library is distributed in the hope that it will be useful, 11 // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 // GNU Lesser General Public License for more details. 14 // 15 // You should have received a copy of the GNU Lesser General Public License 16 // along with the Energi Core library. If not, see <http://www.gnu.org/licenses/>. 17 18 package params 19 20 import "math/big" 21 22 const ( 23 GasLimitBoundDivisor uint64 = 1024 // The bound divisor of the gas limit, used in update calculations. 24 MinGasLimit uint64 = 40000000 // Minimum the gas limit may ever be. 25 GenesisGasLimit uint64 = 40000000 // Gas limit of the Genesis block. 26 27 MaximumExtraDataSize uint64 = 32 // Maximum size extra data may be after Genesis. 28 ExpByteGas uint64 = 10 // Times ceil(log256(exponent)) for the EXP instruction. 29 SloadGas uint64 = 50 // Multiplied by the number of 32-byte words that are copied (round up) for any *COPY operation and added. 30 CallValueTransferGas uint64 = 9000 // Paid for CALL when the value transfer is non-zero. 31 CallNewAccountGas uint64 = 25000 // Paid for CALL when the destination address didn't exist prior. 32 TxGas uint64 = 21000 // Per transaction not creating a contract. NOTE: Not payable on data of calls between transactions. 33 TxGasContractCreation uint64 = 53000 // Per transaction that creates a contract. NOTE: Not payable on data of calls between transactions. 34 TxDataZeroGas uint64 = 4 // Per byte of data attached to a transaction that equals zero. NOTE: Not payable on data of calls between transactions. 35 QuadCoeffDiv uint64 = 512 // Divisor for the quadratic particle of the memory cost equation. 36 LogDataGas uint64 = 8 // Per byte in a LOG* operation's data. 37 CallStipend uint64 = 2300 // Free gas given at beginning of call. 38 39 Sha3Gas uint64 = 30 // Once per SHA3 operation. 40 Sha3WordGas uint64 = 6 // Once per word of the SHA3 operation's data. 41 42 SstoreSetGas uint64 = 20000 // Once per SLOAD operation. 43 SstoreResetGas uint64 = 5000 // Once per SSTORE operation if the zeroness changes from zero. 44 SstoreClearGas uint64 = 5000 // Once per SSTORE operation if the zeroness doesn't change. 45 SstoreRefundGas uint64 = 15000 // Once per SSTORE operation if the zeroness changes to zero. 46 47 NetSstoreNoopGas uint64 = 200 // Once per SSTORE operation if the value doesn't change. 48 NetSstoreInitGas uint64 = 20000 // Once per SSTORE operation from clean zero. 49 NetSstoreCleanGas uint64 = 5000 // Once per SSTORE operation from clean non-zero. 50 NetSstoreDirtyGas uint64 = 200 // Once per SSTORE operation from dirty. 51 52 NetSstoreClearRefund uint64 = 15000 // Once per SSTORE operation for clearing an originally existing storage slot 53 NetSstoreResetRefund uint64 = 4800 // Once per SSTORE operation for resetting to the original non-zero value 54 NetSstoreResetClearRefund uint64 = 19800 // Once per SSTORE operation for resetting to the original zero value 55 56 JumpdestGas uint64 = 1 // Refunded gas, once per SSTORE operation if the zeroness changes to zero. 57 EpochDuration uint64 = 30000 // Duration between proof-of-work epochs. 58 CallGas uint64 = 40 // Once per CALL operation & message call transaction. 59 CreateDataGas uint64 = 200 // 60 CallCreateDepth uint64 = 1024 // Maximum depth of call/create stack. 61 ExpGas uint64 = 10 // Once per EXP instruction 62 LogGas uint64 = 375 // Per LOG* operation. 63 CopyGas uint64 = 3 // 64 StackLimit uint64 = 1024 // Maximum size of VM stack allowed. 65 TierStepGas uint64 = 0 // Once per operation, for a selection of them. 66 LogTopicGas uint64 = 375 // Multiplied by the * of the LOG*, per LOG transaction. e.g. LOG0 incurs 0 * c_txLogTopicGas, LOG4 incurs 4 * c_txLogTopicGas. 67 CreateGas uint64 = 32000 // Once per CREATE operation & contract-creation transaction. 68 Create2Gas uint64 = 32000 // Once per CREATE2 operation 69 SuicideRefundGas uint64 = 24000 // Refunded following a suicide operation. 70 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. 71 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. 72 73 MaxCodeSize = 24576 // Maximum bytecode to permit for a contract 74 75 // Precompiled contract gas prices 76 77 EcrecoverGas uint64 = 3000 // Elliptic curve sender recovery gas price 78 Sha256BaseGas uint64 = 60 // Base price for a SHA256 operation 79 Sha256PerWordGas uint64 = 12 // Per-word price for a SHA256 operation 80 Ripemd160BaseGas uint64 = 600 // Base price for a RIPEMD160 operation 81 Ripemd160PerWordGas uint64 = 120 // Per-word price for a RIPEMD160 operation 82 IdentityBaseGas uint64 = 15 // Base price for a data copy operation 83 IdentityPerWordGas uint64 = 3 // Per-work price for a data copy operation 84 ModExpQuadCoeffDiv uint64 = 20 // Divisor for the quadratic particle of the big int modular exponentiation 85 Bn256AddGas uint64 = 500 // Gas needed for an elliptic curve addition 86 Bn256ScalarMulGas uint64 = 40000 // Gas needed for an elliptic curve scalar multiplication 87 Bn256PairingBaseGas uint64 = 100000 // Base price for an elliptic curve pairing check 88 Bn256PairingPerPointGas uint64 = 80000 // Per-point price for an elliptic curve pairing check 89 ) 90 91 var ( 92 DifficultyBoundDivisor = big.NewInt(2048) // The bound divisor of the difficulty, used in the update calculations. 93 GenesisDifficulty = big.NewInt(131072) // Difficulty of the Genesis block. 94 MinimumDifficulty = big.NewInt(131072) // The minimum that the difficulty may ever be. 95 DurationLimit = big.NewInt(13) // The decision boundary on the blocktime duration used to determine whether difficulty should go up or not. 96 )