protocol_params.go 5.7 KB

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  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. package params
  17. import "math/big"
  18. var (
  19. TargetGasLimit uint64 = GenesisGasLimit // The artificial target
  20. )
  21. const (
  22. GasLimitBoundDivisor uint64 = 1024 // The bound divisor of the gas limit, used in update calculations.
  23. MinGasLimit uint64 = 5000 // Minimum the gas limit may ever be.
  24. GenesisGasLimit uint64 = 4712388 // Gas limit of the Genesis block.
  25. MaximumExtraDataSize uint64 = 32 // Maximum size extra data may be after Genesis.
  26. ExpByteGas uint64 = 10 // Times ceil(log256(exponent)) for the EXP instruction.
  27. SloadGas uint64 = 50 // Multiplied by the number of 32-byte words that are copied (round up) for any *COPY operation and added.
  28. CallValueTransferGas uint64 = 9000 // Paid for CALL when the value transfer is non-zero.
  29. CallNewAccountGas uint64 = 25000 // Paid for CALL when the destination address didn't exist prior.
  30. TxGas uint64 = 21000 // Per transaction not creating a contract. NOTE: Not payable on data of calls between transactions.
  31. TxGasContractCreation uint64 = 53000 // Per transaction that creates a contract. NOTE: Not payable on data of calls between transactions.
  32. TxDataZeroGas uint64 = 4 // Per byte of data attached to a transaction that equals zero. NOTE: Not payable on data of calls between transactions.
  33. QuadCoeffDiv uint64 = 512 // Divisor for the quadratic particle of the memory cost equation.
  34. SstoreSetGas uint64 = 20000 // Once per SLOAD operation.
  35. LogDataGas uint64 = 8 // Per byte in a LOG* operation's data.
  36. CallStipend uint64 = 2300 // Free gas given at beginning of call.
  37. Sha3Gas uint64 = 30 // Once per SHA3 operation.
  38. Sha3WordGas uint64 = 6 // Once per word of the SHA3 operation's data.
  39. SstoreResetGas uint64 = 5000 // Once per SSTORE operation if the zeroness changes from zero.
  40. SstoreClearGas uint64 = 5000 // Once per SSTORE operation if the zeroness doesn't change.
  41. SstoreRefundGas uint64 = 15000 // Once per SSTORE operation if the zeroness changes to zero.
  42. JumpdestGas uint64 = 1 // Refunded gas, once per SSTORE operation if the zeroness changes to zero.
  43. EpochDuration uint64 = 30000 // Duration between proof-of-work epochs.
  44. CallGas uint64 = 40 // Once per CALL operation & message call transaction.
  45. CreateDataGas uint64 = 200 //
  46. CallCreateDepth uint64 = 1024 // Maximum depth of call/create stack.
  47. ExpGas uint64 = 10 // Once per EXP instruction
  48. LogGas uint64 = 375 // Per LOG* operation.
  49. CopyGas uint64 = 3 //
  50. StackLimit uint64 = 1024 // Maximum size of VM stack allowed.
  51. TierStepGas uint64 = 0 // Once per operation, for a selection of them.
  52. LogTopicGas uint64 = 375 // Multiplied by the * of the LOG*, per LOG transaction. e.g. LOG0 incurs 0 * c_txLogTopicGas, LOG4 incurs 4 * c_txLogTopicGas.
  53. CreateGas uint64 = 32000 // Once per CREATE operation & contract-creation transaction.
  54. SuicideRefundGas uint64 = 24000 // Refunded following a suicide operation.
  55. 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.
  56. 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.
  57. MaxCodeSize = 24576 // Maximum bytecode to permit for a contract
  58. // Precompiled contract gas prices
  59. EcrecoverGas uint64 = 3000 // Elliptic curve sender recovery gas price
  60. Sha256BaseGas uint64 = 60 // Base price for a SHA256 operation
  61. Sha256PerWordGas uint64 = 12 // Per-word price for a SHA256 operation
  62. Ripemd160BaseGas uint64 = 600 // Base price for a RIPEMD160 operation
  63. Ripemd160PerWordGas uint64 = 120 // Per-word price for a RIPEMD160 operation
  64. IdentityBaseGas uint64 = 15 // Base price for a data copy operation
  65. IdentityPerWordGas uint64 = 3 // Per-work price for a data copy operation
  66. ModExpQuadCoeffDiv uint64 = 20 // Divisor for the quadratic particle of the big int modular exponentiation
  67. Bn256AddGas uint64 = 500 // Gas needed for an elliptic curve addition
  68. Bn256ScalarMulGas uint64 = 40000 // Gas needed for an elliptic curve scalar multiplication
  69. Bn256PairingBaseGas uint64 = 100000 // Base price for an elliptic curve pairing check
  70. Bn256PairingPerPointGas uint64 = 80000 // Per-point price for an elliptic curve pairing check
  71. )
  72. var (
  73. DifficultyBoundDivisor = big.NewInt(2048) // The bound divisor of the difficulty, used in the update calculations.
  74. GenesisDifficulty = big.NewInt(131072) // Difficulty of the Genesis block.
  75. MinimumDifficulty = big.NewInt(131072) // The minimum that the difficulty may ever be.
  76. DurationLimit = big.NewInt(13) // The decision boundary on the blocktime duration used to determine whether difficulty should go up or not.
  77. )