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47 lines
2.1 KiB
Go
47 lines
2.1 KiB
Go
// Copyright 2026 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 misc
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import (
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"github.com/ethereum/go-ethereum/core/tracing"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/params"
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)
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// ApplyEIP7997 inserts the deterministic deployment factory into the state as an
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// irregular state transition, as specified by EIP-7997. The factory is a keyless
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// CREATE2 factory that, once present at the canonical address on every EVM chain,
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// allows contracts to be deployed at identical addresses across chains.
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func ApplyEIP7997(statedb vm.StateDB) {
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// The account must hold the canonical factory runtime code. If its code hash
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// already matches, the chain satisfies EIP-7997 and nothing needs to change.
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wantHash := crypto.Keccak256Hash(params.DeterministicFactoryCode)
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if statedb.GetCodeHash(params.DeterministicFactoryAddress) == wantHash {
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return
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}
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if !statedb.Exist(params.DeterministicFactoryAddress) {
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statedb.CreateAccount(params.DeterministicFactoryAddress)
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}
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statedb.CreateContract(params.DeterministicFactoryAddress)
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statedb.SetCode(params.DeterministicFactoryAddress, params.DeterministicFactoryCode, tracing.CodeChangeUnspecified)
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// Preserve a pre-existing nonce; only bump the default zero nonce to 1.
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if statedb.GetNonce(params.DeterministicFactoryAddress) == 0 {
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statedb.SetNonce(params.DeterministicFactoryAddress, 1, tracing.NonceChangeNewContract)
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}
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}
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