// 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" "sort" "github.com/ava-labs/coreth/params" "github.com/holiman/uint256" ) var activators = map[int]func(*JumpTable){ 2200: enable2200, 1884: enable1884, 1344: enable1344, 2315: enable2315, } // 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 { enablerFn, ok := activators[eipNum] if !ok { return fmt.Errorf("undefined eip %d", eipNum) } enablerFn(jt) return nil } func ValidEip(eipNum int) bool { _, ok := activators[eipNum] return ok } func ActivateableEips() []string { var nums []string for k := range activators { nums = append(nums, fmt.Sprintf("%d", k)) } sort.Strings(nums) return nums } // 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[SLOAD].constantGas = params.SloadGasEIP1884 jt[BALANCE].constantGas = params.BalanceGasEIP1884 jt[EXTCODEHASH].constantGas = params.ExtcodeHashGasEIP1884 // New opcode jt[SELFBALANCE] = &operation{ execute: opSelfBalance, constantGas: GasFastStep, minStack: minStack(0, 1), maxStack: maxStack(0, 1), } } func opSelfBalance(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { balance, _ := uint256.FromBig(interpreter.evm.StateDB.GetBalance(callContext.contract.Address())) callContext.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), } } // opChainID implements CHAINID opcode func opChainID(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { chainId, _ := uint256.FromBig(interpreter.evm.chainConfig.ChainID) callContext.stack.push(chainId) return nil, nil } // enable2200 applies EIP-2200 (Rebalance net-metered SSTORE) func enable2200(jt *JumpTable) { jt[SLOAD].constantGas = params.SloadGasEIP2200 jt[SSTORE].dynamicGas = gasSStoreEIP2200 } // enable2315 applies EIP-2315 (Simple Subroutines) // - Adds opcodes that jump to and return from subroutines func enable2315(jt *JumpTable) { // New opcode jt[BEGINSUB] = &operation{ execute: opBeginSub, constantGas: GasQuickStep, minStack: minStack(0, 0), maxStack: maxStack(0, 0), } // New opcode jt[JUMPSUB] = &operation{ execute: opJumpSub, constantGas: GasSlowStep, minStack: minStack(1, 0), maxStack: maxStack(1, 0), jumps: true, } // New opcode jt[RETURNSUB] = &operation{ execute: opReturnSub, constantGas: GasFastStep, minStack: minStack(0, 0), maxStack: maxStack(0, 0), jumps: true, } }