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eb67d61933
This PR simplifies the implementation of EIP-7610 by eliminating the
need to check storage emptiness during contract deployment.
EIP-7610 specifies that contract creation must be rejected if the
destination account has a non-zero nonce, non-empty runtime code, or
**non-empty storage**.
After EIP-161, all newly deployed contracts are initialized with a nonce
of one. As a result, such accounts are no longer eligible as deployment
targets unless they are explicitly cleared.
However, prior to EIP-161, contracts were initialized with a nonce of
zero. This made it possible to end up with accounts that have:
- zero nonce
- empty runtime code
- non-empty storage (created during constructor execution)
- non-zero balance
These edge-case accounts complicate the storage emptiness check.
In practice, contract addresses are derived using one of the following
formulas:
- `Keccak256(rlp({sender, nonce}))[12:]`
- `Keccak256([]byte{0xff}, sender, salt[:], initHash)[12:]`
As such, an existing address is not selected as a deployment target
unless a collision occurs, which is extremely unlikely.
---
Previously, verifying storage emptiness relied on GetStorageRoot.
However, with the transition to the block-based access list (BAL),
the storage root is no longer available, as computing it would require
reconstructing the full storage trie from all mutations of preceding
transactions.
To address this, this PR introduces a simplified approach: it hardcodes
the set of known accounts that have zero nonce, empty runtime code,
but non-empty storage and non-zero balance. During contract deployment,
if the destination address belongs to this set, the deployment is
rejected.
This check is applied retroactively back to genesis. Since no address
collision events have occurred in Ethereum’s history, this change does
not
alter existing behavior. Instead, it serves as a safeguard for future
state
transitions.
98 lines
3.7 KiB
Go
98 lines
3.7 KiB
Go
// Copyright 2016 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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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/stateless"
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"github.com/ethereum/go-ethereum/core/tracing"
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"github.com/ethereum/go-ethereum/core/types"
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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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// StateDB is an EVM database for full state querying.
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type StateDB interface {
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CreateAccount(common.Address)
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CreateContract(common.Address)
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SubBalance(common.Address, *uint256.Int, tracing.BalanceChangeReason) uint256.Int
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AddBalance(common.Address, *uint256.Int, tracing.BalanceChangeReason) uint256.Int
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GetBalance(common.Address) *uint256.Int
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GetNonce(common.Address) uint64
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SetNonce(common.Address, uint64, tracing.NonceChangeReason)
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GetCodeHash(common.Address) common.Hash
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GetCode(common.Address) []byte
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// SetCode sets the new code for the address, and returns the previous code, if any.
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SetCode(common.Address, []byte, tracing.CodeChangeReason) []byte
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GetCodeSize(common.Address) int
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AddRefund(uint64)
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SubRefund(uint64)
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GetRefund() uint64
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GetStateAndCommittedState(common.Address, common.Hash) (common.Hash, common.Hash)
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GetState(common.Address, common.Hash) common.Hash
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SetState(common.Address, common.Hash, common.Hash) common.Hash
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GetTransientState(addr common.Address, key common.Hash) common.Hash
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SetTransientState(addr common.Address, key, value common.Hash)
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SelfDestruct(common.Address)
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HasSelfDestructed(common.Address) bool
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// Exist reports whether the given account exists in state.
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// Notably this also returns true for self-destructed accounts within the current transaction.
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Exist(common.Address) bool
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// IsNewContract reports whether the contract at the given address was deployed
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// during the current transaction.
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IsNewContract(addr common.Address) bool
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// Empty returns whether the given account is empty. Empty
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// is defined according to EIP161 (balance = nonce = code = 0).
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Empty(common.Address) bool
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AddressInAccessList(addr common.Address) bool
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SlotInAccessList(addr common.Address, slot common.Hash) (addressOk bool, slotOk bool)
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// AddAddressToAccessList adds the given address to the access list. This operation is safe to perform
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// even if the feature/fork is not active yet
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AddAddressToAccessList(addr common.Address)
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// AddSlotToAccessList adds the given (address,slot) to the access list. This operation is safe to perform
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// even if the feature/fork is not active yet
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AddSlotToAccessList(addr common.Address, slot common.Hash)
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Prepare(rules params.Rules, sender, coinbase common.Address, dest *common.Address, precompiles []common.Address, txAccesses types.AccessList)
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RevertToSnapshot(int)
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Snapshot() int
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AddLog(*types.Log)
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LogsForBurnAccounts() []*types.Log
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AddPreimage(common.Hash, []byte)
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Witness() *stateless.Witness
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AccessEvents() *state.AccessEvents
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// Finalise must be invoked at the end of a transaction
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Finalise(bool)
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}
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