236 lines
7.0 KiB
Go
236 lines
7.0 KiB
Go
// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package vm
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import (
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"fmt"
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"sort"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/params"
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"github.com/holiman/uint256"
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)
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var activators = map[int]func(*JumpTable){
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3855: enable3855,
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3529: enable3529,
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3198: enable3198,
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2929: enable2929,
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2200: enable2200,
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1884: enable1884,
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1344: enable1344,
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1153: enable1153,
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}
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// EnableEIP enables the given EIP on the config.
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// This operation writes in-place, and callers need to ensure that the globally
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// defined jump tables are not polluted.
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func EnableEIP(eipNum int, jt *JumpTable) error {
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enablerFn, ok := activators[eipNum]
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if !ok {
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return fmt.Errorf("undefined eip %d", eipNum)
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}
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enablerFn(jt)
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return nil
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}
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func ValidEip(eipNum int) bool {
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_, ok := activators[eipNum]
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return ok
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}
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func ActivateableEips() []string {
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var nums []string
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for k := range activators {
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nums = append(nums, fmt.Sprintf("%d", k))
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}
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sort.Strings(nums)
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return nums
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}
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// enable1884 applies EIP-1884 to the given jump table:
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// - Increase cost of BALANCE to 700
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// - Increase cost of EXTCODEHASH to 700
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// - Increase cost of SLOAD to 800
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// - Define SELFBALANCE, with cost GasFastStep (5)
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func enable1884(jt *JumpTable) {
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// Gas cost changes
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jt[SLOAD].constantGas = params.SloadGasEIP1884
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jt[BALANCE].constantGas = params.BalanceGasEIP1884
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jt[EXTCODEHASH].constantGas = params.ExtcodeHashGasEIP1884
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// New opcode
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jt[SELFBALANCE] = &operation{
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execute: opSelfBalance,
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constantGas: GasFastStep,
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minStack: minStack(0, 1),
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maxStack: maxStack(0, 1),
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}
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}
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func opSelfBalance(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
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balance, _ := uint256.FromBig(interpreter.evm.StateDB.GetBalance(scope.Contract.Address()))
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scope.Stack.push(balance)
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return nil, nil
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}
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// enable1344 applies EIP-1344 (ChainID Opcode)
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// - Adds an opcode that returns the current chain’s EIP-155 unique identifier
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func enable1344(jt *JumpTable) {
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// New opcode
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jt[CHAINID] = &operation{
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execute: opChainID,
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constantGas: GasQuickStep,
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minStack: minStack(0, 1),
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maxStack: maxStack(0, 1),
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}
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}
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// opChainID implements CHAINID opcode
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func opChainID(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
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chainId, _ := uint256.FromBig(interpreter.evm.chainConfig.ChainID)
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scope.Stack.push(chainId)
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return nil, nil
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}
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// enable2200 applies EIP-2200 (Rebalance net-metered SSTORE)
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func enable2200(jt *JumpTable) {
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jt[SLOAD].constantGas = params.SloadGasEIP2200
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jt[SSTORE].dynamicGas = gasSStoreEIP2200
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}
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// enable2929 enables "EIP-2929: Gas cost increases for state access opcodes"
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// https://eips.ethereum.org/EIPS/eip-2929
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func enable2929(jt *JumpTable) {
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jt[SSTORE].dynamicGas = gasSStoreEIP2929
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jt[SLOAD].constantGas = 0
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jt[SLOAD].dynamicGas = gasSLoadEIP2929
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jt[EXTCODECOPY].constantGas = params.WarmStorageReadCostEIP2929
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jt[EXTCODECOPY].dynamicGas = gasExtCodeCopyEIP2929
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jt[EXTCODESIZE].constantGas = params.WarmStorageReadCostEIP2929
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jt[EXTCODESIZE].dynamicGas = gasEip2929AccountCheck
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jt[EXTCODEHASH].constantGas = params.WarmStorageReadCostEIP2929
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jt[EXTCODEHASH].dynamicGas = gasEip2929AccountCheck
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jt[BALANCE].constantGas = params.WarmStorageReadCostEIP2929
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jt[BALANCE].dynamicGas = gasEip2929AccountCheck
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jt[CALL].constantGas = params.WarmStorageReadCostEIP2929
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jt[CALL].dynamicGas = gasCallEIP2929
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jt[CALLCODE].constantGas = params.WarmStorageReadCostEIP2929
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jt[CALLCODE].dynamicGas = gasCallCodeEIP2929
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jt[STATICCALL].constantGas = params.WarmStorageReadCostEIP2929
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jt[STATICCALL].dynamicGas = gasStaticCallEIP2929
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jt[DELEGATECALL].constantGas = params.WarmStorageReadCostEIP2929
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jt[DELEGATECALL].dynamicGas = gasDelegateCallEIP2929
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// This was previously part of the dynamic cost, but we're using it as a constantGas
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// factor here
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jt[SELFDESTRUCT].constantGas = params.SelfdestructGasEIP150
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jt[SELFDESTRUCT].dynamicGas = gasSelfdestructEIP2929
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}
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// enable3529 enabled "EIP-3529: Reduction in refunds":
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// - Removes refunds for selfdestructs
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// - Reduces refunds for SSTORE
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// - Reduces max refunds to 20% gas
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func enable3529(jt *JumpTable) {
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jt[SSTORE].dynamicGas = gasSStoreEIP3529
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jt[SELFDESTRUCT].dynamicGas = gasSelfdestructEIP3529
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}
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// enable3198 applies EIP-3198 (BASEFEE Opcode)
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// - Adds an opcode that returns the current block's base fee.
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func enable3198(jt *JumpTable) {
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// New opcode
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jt[BASEFEE] = &operation{
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execute: opBaseFee,
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constantGas: GasQuickStep,
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minStack: minStack(0, 1),
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maxStack: maxStack(0, 1),
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}
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}
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// enable1153 applies EIP-1153 "Transient Storage"
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// - Adds TLOAD that reads from transient storage
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// - Adds TSTORE that writes to transient storage
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func enable1153(jt *JumpTable) {
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jt[TLOAD] = &operation{
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execute: opTload,
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constantGas: params.WarmStorageReadCostEIP2929,
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minStack: minStack(1, 1),
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maxStack: maxStack(1, 1),
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}
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jt[TSTORE] = &operation{
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execute: opTstore,
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constantGas: params.WarmStorageReadCostEIP2929,
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minStack: minStack(2, 0),
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maxStack: maxStack(2, 0),
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}
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}
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// opTload implements TLOAD opcode
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func opTload(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
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loc := scope.Stack.peek()
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hash := common.Hash(loc.Bytes32())
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val := interpreter.evm.StateDB.GetTransientState(scope.Contract.Address(), hash)
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loc.SetBytes(val.Bytes())
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return nil, nil
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}
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// opTstore implements TSTORE opcode
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func opTstore(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
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if interpreter.readOnly {
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return nil, ErrWriteProtection
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}
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loc := scope.Stack.pop()
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val := scope.Stack.pop()
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interpreter.evm.StateDB.SetTransientState(scope.Contract.Address(), loc.Bytes32(), val.Bytes32())
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return nil, nil
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}
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// opBaseFee implements BASEFEE opcode
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func opBaseFee(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
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baseFee, _ := uint256.FromBig(interpreter.evm.Context.BaseFee)
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scope.Stack.push(baseFee)
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return nil, nil
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}
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// enable3855 applies EIP-3855 (PUSH0 opcode)
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func enable3855(jt *JumpTable) {
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// New opcode
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jt[PUSH0] = &operation{
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execute: opPush0,
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constantGas: GasQuickStep,
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minStack: minStack(0, 1),
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maxStack: maxStack(0, 1),
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}
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}
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// opPush0 implements the PUSH0 opcode
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func opPush0(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
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scope.Stack.push(new(uint256.Int))
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return nil, nil
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}
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