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| author | JM <jm@dexon.org> | 2019-01-15 23:33:28 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-01-15 23:33:28 +0800 |
| commit | 020c8a477578cef3764b54f33d9ca0cf6caf7631 (patch) | |
| tree | 08a669a19cc428b8c48dad180f1f32096885826b /core/vm/gas.go | |
| parent | bdde6109ffa6fa4d295708a2a75271186a12c761 (diff) | |
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core: vm: refactor file structure (#151)
For support other vm types, this pr modified the core/vm file
structures.
Diffstat (limited to 'core/vm/gas.go')
| -rw-r--r-- | core/vm/gas.go | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/core/vm/gas.go b/core/vm/gas.go deleted file mode 100644 index 52c3b02f1..000000000 --- a/core/vm/gas.go +++ /dev/null @@ -1,59 +0,0 @@ -// Copyright 2015 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. - -package vm - -import ( - "math/big" - - "github.com/dexon-foundation/dexon/params" -) - -// Gas costs -const ( - GasQuickStep uint64 = 2 - GasFastestStep uint64 = 3 - GasFastStep uint64 = 5 - GasMidStep uint64 = 8 - GasSlowStep uint64 = 10 - GasExtStep uint64 = 20 - - GasReturn uint64 = 0 - GasStop uint64 = 0 - GasContractByte uint64 = 200 -) - -// calcGas returns the actual gas cost of the call. -// -// The cost of gas was changed during the homestead price change HF. To allow for EIP150 -// to be implemented. The returned gas is gas - base * 63 / 64. -func callGas(gasTable params.GasTable, availableGas, base uint64, callCost *big.Int) (uint64, error) { - if gasTable.CreateBySuicide > 0 { - availableGas = availableGas - base - gas := availableGas - availableGas/64 - // If the bit length exceeds 64 bit we know that the newly calculated "gas" for EIP150 - // is smaller than the requested amount. Therefor we return the new gas instead - // of returning an error. - if callCost.BitLen() > 64 || gas < callCost.Uint64() { - return gas, nil - } - } - if callCost.BitLen() > 64 { - return 0, errGasUintOverflow - } - - return callCost.Uint64(), nil -} |