plugeth/core/vm/eips.go

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// 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/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/params"
"github.com/holiman/uint256"
)
var activators = map[int]func(*JumpTable){
3855: enable3855,
3860: enable3860,
3529: enable3529,
3198: enable3198,
2929: enable2929,
2200: enable2200,
1884: enable1884,
1344: enable1344,
1153: enable1153,
}
// 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, scope *ScopeContext) ([]byte, error) {
balance, _ := uint256.FromBig(interpreter.evm.StateDB.GetBalance(scope.Contract.Address()))
scope.Stack.push(balance)
return nil, nil
}
// enable1344 applies EIP-1344 (ChainID Opcode)
// - Adds an opcode that returns the current chains 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, scope *ScopeContext) ([]byte, error) {
chainId, _ := uint256.FromBig(interpreter.evm.chainConfig.ChainID)
scope.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
}
// enable2929 enables "EIP-2929: Gas cost increases for state access opcodes"
// https://eips.ethereum.org/EIPS/eip-2929
func enable2929(jt *JumpTable) {
jt[SSTORE].dynamicGas = gasSStoreEIP2929
jt[SLOAD].constantGas = 0
jt[SLOAD].dynamicGas = gasSLoadEIP2929
jt[EXTCODECOPY].constantGas = params.WarmStorageReadCostEIP2929
jt[EXTCODECOPY].dynamicGas = gasExtCodeCopyEIP2929
jt[EXTCODESIZE].constantGas = params.WarmStorageReadCostEIP2929
jt[EXTCODESIZE].dynamicGas = gasEip2929AccountCheck
jt[EXTCODEHASH].constantGas = params.WarmStorageReadCostEIP2929
jt[EXTCODEHASH].dynamicGas = gasEip2929AccountCheck
jt[BALANCE].constantGas = params.WarmStorageReadCostEIP2929
jt[BALANCE].dynamicGas = gasEip2929AccountCheck
jt[CALL].constantGas = params.WarmStorageReadCostEIP2929
jt[CALL].dynamicGas = gasCallEIP2929
jt[CALLCODE].constantGas = params.WarmStorageReadCostEIP2929
jt[CALLCODE].dynamicGas = gasCallCodeEIP2929
jt[STATICCALL].constantGas = params.WarmStorageReadCostEIP2929
jt[STATICCALL].dynamicGas = gasStaticCallEIP2929
jt[DELEGATECALL].constantGas = params.WarmStorageReadCostEIP2929
jt[DELEGATECALL].dynamicGas = gasDelegateCallEIP2929
// This was previously part of the dynamic cost, but we're using it as a constantGas
// factor here
jt[SELFDESTRUCT].constantGas = params.SelfdestructGasEIP150
jt[SELFDESTRUCT].dynamicGas = gasSelfdestructEIP2929
}
// enable3529 enabled "EIP-3529: Reduction in refunds":
// - Removes refunds for selfdestructs
// - Reduces refunds for SSTORE
// - Reduces max refunds to 20% gas
func enable3529(jt *JumpTable) {
jt[SSTORE].dynamicGas = gasSStoreEIP3529
jt[SELFDESTRUCT].dynamicGas = gasSelfdestructEIP3529
}
// enable3198 applies EIP-3198 (BASEFEE Opcode)
// - Adds an opcode that returns the current block's base fee.
func enable3198(jt *JumpTable) {
// New opcode
jt[BASEFEE] = &operation{
execute: opBaseFee,
constantGas: GasQuickStep,
minStack: minStack(0, 1),
maxStack: maxStack(0, 1),
}
}
// enable1153 applies EIP-1153 "Transient Storage"
// - Adds TLOAD that reads from transient storage
// - Adds TSTORE that writes to transient storage
func enable1153(jt *JumpTable) {
jt[TLOAD] = &operation{
execute: opTload,
constantGas: params.WarmStorageReadCostEIP2929,
minStack: minStack(1, 1),
maxStack: maxStack(1, 1),
}
jt[TSTORE] = &operation{
execute: opTstore,
constantGas: params.WarmStorageReadCostEIP2929,
minStack: minStack(2, 0),
maxStack: maxStack(2, 0),
}
}
// opTload implements TLOAD opcode
func opTload(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
loc := scope.Stack.peek()
hash := common.Hash(loc.Bytes32())
val := interpreter.evm.StateDB.GetTransientState(scope.Contract.Address(), hash)
loc.SetBytes(val.Bytes())
return nil, nil
}
// opTstore implements TSTORE opcode
func opTstore(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
if interpreter.readOnly {
return nil, ErrWriteProtection
}
loc := scope.Stack.pop()
val := scope.Stack.pop()
interpreter.evm.StateDB.SetTransientState(scope.Contract.Address(), loc.Bytes32(), val.Bytes32())
return nil, nil
}
// opBaseFee implements BASEFEE opcode
func opBaseFee(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
baseFee, _ := uint256.FromBig(interpreter.evm.Context.BaseFee)
scope.Stack.push(baseFee)
return nil, nil
}
// enable3855 applies EIP-3855 (PUSH0 opcode)
func enable3855(jt *JumpTable) {
// New opcode
jt[PUSH0] = &operation{
execute: opPush0,
constantGas: GasQuickStep,
minStack: minStack(0, 1),
maxStack: maxStack(0, 1),
}
}
// opPush0 implements the PUSH0 opcode
func opPush0(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int))
return nil, nil
}
// ebnable3860 enables "EIP-3860: Limit and meter initcode"
// https://eips.ethereum.org/EIPS/eip-3860
func enable3860(jt *JumpTable) {
jt[CREATE].dynamicGas = gasCreateEip3860
jt[CREATE2].dynamicGas = gasCreate2Eip3860
}