diff options
Diffstat (limited to 'core/vm/gas.go')
| -rw-r--r-- | core/vm/gas.go | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/core/vm/gas.go b/core/vm/gas.go new file mode 100644 index 000000000..c4d5e4c4e --- /dev/null +++ b/core/vm/gas.go @@ -0,0 +1,135 @@ +package vm + +import "math/big" + +type req struct { + stack int + gas *big.Int +} + +var ( + GasQuickStep = big.NewInt(2) + GasFastestStep = big.NewInt(3) + GasFastStep = big.NewInt(5) + GasMidStep = big.NewInt(8) + GasSlowStep = big.NewInt(10) + GasExtStep = big.NewInt(20) + + GasStorageGet = big.NewInt(50) + GasStorageAdd = big.NewInt(20000) + GasStorageMod = big.NewInt(5000) + GasLogBase = big.NewInt(375) + GasLogTopic = big.NewInt(375) + GasLogByte = big.NewInt(8) + GasCreate = big.NewInt(32000) + GasCreateByte = big.NewInt(200) + GasCall = big.NewInt(40) + GasCallValueTransfer = big.NewInt(9000) + GasStipend = big.NewInt(2300) + GasCallNewAccount = big.NewInt(25000) + GasReturn = big.NewInt(0) + GasStop = big.NewInt(0) + GasJumpDest = big.NewInt(1) + + RefundStorage = big.NewInt(15000) + RefundSuicide = big.NewInt(24000) + + GasMemWord = big.NewInt(3) + GasQuadCoeffDenom = big.NewInt(512) + GasContractByte = big.NewInt(200) + GasTransaction = big.NewInt(21000) + GasTxDataNonzeroByte = big.NewInt(68) + GasTxDataZeroByte = big.NewInt(4) + GasTx = big.NewInt(21000) + GasExp = big.NewInt(10) + GasExpByte = big.NewInt(10) + + GasSha3Base = big.NewInt(30) + GasSha3Word = big.NewInt(6) + GasSha256Base = big.NewInt(60) + GasSha256Word = big.NewInt(12) + GasRipemdBase = big.NewInt(600) + GasRipemdWord = big.NewInt(12) + GasEcrecover = big.NewInt(3000) + GasIdentityBase = big.NewInt(15) + GasIdentityWord = big.NewInt(3) + GasCopyWord = big.NewInt(3) +) + +var _baseCheck = map[OpCode]req{ + // Req stack Gas price + ADD: {2, GasFastestStep}, + LT: {2, GasFastestStep}, + GT: {2, GasFastestStep}, + SLT: {2, GasFastestStep}, + SGT: {2, GasFastestStep}, + EQ: {2, GasFastestStep}, + ISZERO: {1, GasFastestStep}, + SUB: {2, GasFastestStep}, + AND: {2, GasFastestStep}, + OR: {2, GasFastestStep}, + XOR: {2, GasFastestStep}, + NOT: {1, GasFastestStep}, + BYTE: {2, GasFastestStep}, + CALLDATALOAD: {1, GasFastestStep}, + CALLDATACOPY: {3, GasFastestStep}, + MLOAD: {1, GasFastestStep}, + MSTORE: {2, GasFastestStep}, + MSTORE8: {2, GasFastestStep}, + CODECOPY: {3, GasFastestStep}, + MUL: {2, GasFastStep}, + DIV: {2, GasFastStep}, + SDIV: {2, GasFastStep}, + MOD: {2, GasFastStep}, + SMOD: {2, GasFastStep}, + SIGNEXTEND: {2, GasFastStep}, + ADDMOD: {3, GasMidStep}, + MULMOD: {3, GasMidStep}, + JUMP: {1, GasMidStep}, + JUMPI: {2, GasSlowStep}, + EXP: {2, GasSlowStep}, + ADDRESS: {0, GasQuickStep}, + ORIGIN: {0, GasQuickStep}, + CALLER: {0, GasQuickStep}, + CALLVALUE: {0, GasQuickStep}, + CODESIZE: {0, GasQuickStep}, + GASPRICE: {0, GasQuickStep}, + COINBASE: {0, GasQuickStep}, + TIMESTAMP: {0, GasQuickStep}, + NUMBER: {0, GasQuickStep}, + CALLDATASIZE: {0, GasQuickStep}, + DIFFICULTY: {0, GasQuickStep}, + GASLIMIT: {0, GasQuickStep}, + POP: {0, GasQuickStep}, + PC: {0, GasQuickStep}, + MSIZE: {0, GasQuickStep}, + GAS: {0, GasQuickStep}, + BLOCKHASH: {1, GasExtStep}, + BALANCE: {0, GasExtStep}, + EXTCODESIZE: {1, GasExtStep}, + EXTCODECOPY: {4, GasExtStep}, + SLOAD: {1, GasStorageGet}, + SSTORE: {2, Zero}, + SHA3: {1, GasSha3Base}, + CREATE: {3, GasCreate}, + CALL: {7, GasCall}, + CALLCODE: {7, GasCall}, + JUMPDEST: {0, GasJumpDest}, + SUICIDE: {1, Zero}, + RETURN: {2, Zero}, +} + +func baseCheck(op OpCode, stack *stack, gas *big.Int) { + if r, ok := _baseCheck[op]; ok { + stack.require(r.stack) + + gas.Add(gas, r.gas) + } +} + +func toWordSize(size *big.Int) *big.Int { + tmp := new(big.Int) + tmp.Add(size, u256(31)) + tmp.Div(tmp, u256(32)) + return tmp +} |