2015-03-09 18:25:27 -05:00
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package vm
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import "math/big"
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type req struct {
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stack int
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gas *big.Int
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}
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2015-03-16 15:46:47 -05:00
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var (
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GasQuickStep = big.NewInt(2)
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GasFastestStep = big.NewInt(3)
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GasFastStep = big.NewInt(5)
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GasMidStep = big.NewInt(8)
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GasSlowStep = big.NewInt(10)
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GasExtStep = big.NewInt(20)
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GasStorageGet = big.NewInt(50)
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GasStorageAdd = big.NewInt(20000)
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GasStorageMod = big.NewInt(5000)
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GasLogBase = big.NewInt(375)
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GasLogTopic = big.NewInt(375)
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GasLogByte = big.NewInt(8)
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GasCreate = big.NewInt(32000)
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GasCreateByte = big.NewInt(200)
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GasCall = big.NewInt(40)
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GasCallValueTransfer = big.NewInt(9000)
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GasStipend = big.NewInt(2300)
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GasCallNewAccount = big.NewInt(25000)
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GasReturn = big.NewInt(0)
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GasStop = big.NewInt(0)
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GasJumpDest = big.NewInt(1)
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RefundStorage = big.NewInt(15000)
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RefundSuicide = big.NewInt(24000)
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GasMemWord = big.NewInt(3)
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GasQuadCoeffDenom = big.NewInt(512)
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GasContractByte = big.NewInt(200)
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GasTransaction = big.NewInt(21000)
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GasTxDataNonzeroByte = big.NewInt(68)
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GasTxDataZeroByte = big.NewInt(4)
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GasTx = big.NewInt(21000)
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GasExp = big.NewInt(10)
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GasExpByte = big.NewInt(10)
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GasSha3Base = big.NewInt(30)
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GasSha3Word = big.NewInt(6)
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GasSha256Base = big.NewInt(60)
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GasSha256Word = big.NewInt(12)
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GasRipemdBase = big.NewInt(600)
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GasRipemdWord = big.NewInt(12)
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GasEcrecover = big.NewInt(3000)
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GasIdentityBase = big.NewInt(15)
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GasIdentityWord = big.NewInt(3)
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GasCopyWord = big.NewInt(3)
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)
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2015-03-09 18:25:27 -05:00
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var _baseCheck = map[OpCode]req{
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// Req stack Gas price
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ADD: {2, GasFastestStep},
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LT: {2, GasFastestStep},
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GT: {2, GasFastestStep},
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SLT: {2, GasFastestStep},
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SGT: {2, GasFastestStep},
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EQ: {2, GasFastestStep},
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ISZERO: {1, GasFastestStep},
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SUB: {2, GasFastestStep},
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AND: {2, GasFastestStep},
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OR: {2, GasFastestStep},
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XOR: {2, GasFastestStep},
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NOT: {1, GasFastestStep},
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BYTE: {2, GasFastestStep},
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CALLDATALOAD: {1, GasFastestStep},
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CALLDATACOPY: {3, GasFastestStep},
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MLOAD: {1, GasFastestStep},
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MSTORE: {2, GasFastestStep},
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MSTORE8: {2, GasFastestStep},
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CODECOPY: {3, GasFastestStep},
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MUL: {2, GasFastStep},
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DIV: {2, GasFastStep},
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SDIV: {2, GasFastStep},
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MOD: {2, GasFastStep},
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SMOD: {2, GasFastStep},
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SIGNEXTEND: {2, GasFastStep},
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ADDMOD: {3, GasMidStep},
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MULMOD: {3, GasMidStep},
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JUMP: {1, GasMidStep},
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JUMPI: {2, GasSlowStep},
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EXP: {2, GasSlowStep},
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ADDRESS: {0, GasQuickStep},
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ORIGIN: {0, GasQuickStep},
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CALLER: {0, GasQuickStep},
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CALLVALUE: {0, GasQuickStep},
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CODESIZE: {0, GasQuickStep},
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GASPRICE: {0, GasQuickStep},
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COINBASE: {0, GasQuickStep},
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TIMESTAMP: {0, GasQuickStep},
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NUMBER: {0, GasQuickStep},
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CALLDATASIZE: {0, GasQuickStep},
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DIFFICULTY: {0, GasQuickStep},
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GASLIMIT: {0, GasQuickStep},
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POP: {0, GasQuickStep},
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PC: {0, GasQuickStep},
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MSIZE: {0, GasQuickStep},
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GAS: {0, GasQuickStep},
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BLOCKHASH: {1, GasExtStep},
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BALANCE: {0, GasExtStep},
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EXTCODESIZE: {1, GasExtStep},
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EXTCODECOPY: {4, GasExtStep},
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SLOAD: {1, GasStorageGet},
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SSTORE: {2, Zero},
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SHA3: {1, GasSha3Base},
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CREATE: {3, GasCreate},
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CALL: {7, GasCall},
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CALLCODE: {7, GasCall},
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JUMPDEST: {0, GasJumpDest},
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SUICIDE: {1, Zero},
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RETURN: {2, Zero},
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}
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func baseCheck(op OpCode, stack *stack, gas *big.Int) {
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if r, ok := _baseCheck[op]; ok {
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stack.require(r.stack)
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gas.Add(gas, r.gas)
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}
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}
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func toWordSize(size *big.Int) *big.Int {
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tmp := new(big.Int)
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tmp.Add(size, u256(31))
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tmp.Div(tmp, u256(32))
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return tmp
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}
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