// Copyright 2019 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 ( "fmt" "github.com/ava-labs/coreth/params" ) // EnableEIP enables the given EIP on the config. // This operation writes in-place, and callers need to ensure that the globally // defined jump tables are not polluted. func EnableEIP(eipNum int, jt *JumpTable) error { switch eipNum { case 2200: enable2200(jt) case 1884: enable1884(jt) case 1344: enable1344(jt) default: return fmt.Errorf("undefined eip %d", eipNum) } return nil } // enable1884 applies EIP-1884 to the given jump table: // - Increase cost of BALANCE to 700 // - Increase cost of EXTCODEHASH to 700 // - Increase cost of SLOAD to 800 // - Define SELFBALANCE, with cost GasFastStep (5) func enable1884(jt *JumpTable) { // Gas cost changes jt[BALANCE].constantGas = params.BalanceGasEIP1884 jt[EXTCODEHASH].constantGas = params.ExtcodeHashGasEIP1884 jt[SLOAD].constantGas = params.SloadGasEIP1884 // New opcode jt[SELFBALANCE] = operation{ execute: opSelfBalance, constantGas: GasFastStep, minStack: minStack(0, 1), maxStack: maxStack(0, 1), valid: true, } } func opSelfBalance(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { balance := interpreter.intPool.get().Set(interpreter.evm.StateDB.GetBalance(contract.Address())) stack.push(balance) return nil, nil } // enable1344 applies EIP-1344 (ChainID Opcode) // - Adds an opcode that returns the current chain’s EIP-155 unique identifier func enable1344(jt *JumpTable) { // New opcode jt[CHAINID] = operation{ execute: opChainID, constantGas: GasQuickStep, minStack: minStack(0, 1), maxStack: maxStack(0, 1), valid: true, } } // opChainID implements CHAINID opcode func opChainID(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) { chainId := interpreter.intPool.get().Set(interpreter.evm.chainConfig.ChainID) stack.push(chainId) return nil, nil } // enable2200 applies EIP-2200 (Rebalance net-metered SSTORE) func enable2200(jt *JumpTable) { jt[SSTORE].dynamicGas = gasSStoreEIP2200 }