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https://github.com/ethereum/go-ethereum.git
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113 lines
4.3 KiB
Go
113 lines
4.3 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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// Tests for EIP-7997: the deterministic deployment factory inserted as an
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// irregular state transition at the Amsterdam activation block.
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package core
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import (
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"bytes"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus/misc"
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"github.com/ethereum/go-ethereum/core/types"
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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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"github.com/holiman/uint256"
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)
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// TestApplyEIP7997 verifies the irregular state transition seeds the factory
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// account with the canonical code and nonce.
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func TestApplyEIP7997(t *testing.T) {
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sdb := mkState(nil)
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misc.ApplyEIP7997(sdb)
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if got := sdb.GetCode(params.DeterministicFactoryAddress); !bytes.Equal(got, params.DeterministicFactoryCode) {
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t.Fatalf("factory code mismatch:\n got %x\nwant %x", got, params.DeterministicFactoryCode)
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}
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if got := sdb.GetNonce(params.DeterministicFactoryAddress); got != 1 {
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t.Fatalf("factory nonce = %d, want %d", got, 1)
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}
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}
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// TestApplyEIP7997Existing checks that a chain which already hosts the factory
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// (for example via its keyless creation transaction) is left untouched, so the
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// transition never rewrites an existing nonce.
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func TestApplyEIP7997Existing(t *testing.T) {
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sdb := mkState(types.GenesisAlloc{
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params.DeterministicFactoryAddress: {Code: params.DeterministicFactoryCode, Nonce: 5},
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})
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misc.ApplyEIP7997(sdb)
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if got := sdb.GetNonce(params.DeterministicFactoryAddress); got != 5 {
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t.Fatalf("existing factory nonce overwritten: got %d, want 5", got)
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}
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}
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// TestApplyEIP7997WrongCode checks that an account occupying the factory address
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// with the wrong code is force-overwritten with the canonical runtime code, while
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// a pre-existing non-zero nonce is preserved.
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func TestApplyEIP7997WrongCode(t *testing.T) {
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sdb := mkState(types.GenesisAlloc{
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params.DeterministicFactoryAddress: {Code: []byte{0x60, 0x00}, Nonce: 7},
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})
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misc.ApplyEIP7997(sdb)
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if got := sdb.GetCode(params.DeterministicFactoryAddress); !bytes.Equal(got, params.DeterministicFactoryCode) {
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t.Fatalf("factory code not overwritten:\n got %x\nwant %x", got, params.DeterministicFactoryCode)
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}
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if got := sdb.GetNonce(params.DeterministicFactoryAddress); got != 7 {
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t.Fatalf("factory nonce = %d, want %d (existing nonce must be preserved)", got, 7)
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}
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}
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// TestEIP7997FactoryDeploys exercises the inserted factory bytecode: calling it
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// with a salt followed by init code must CREATE2-deploy the contract at the
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// canonical deterministic address and return that address (20 bytes, unpadded).
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func TestEIP7997FactoryDeploys(t *testing.T) {
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sdb := mkState(nil)
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misc.ApplyEIP7997(sdb)
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var (
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caller = common.Address{0xca}
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salt [32]byte
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// initcode returning the single-byte runtime 0xfe:
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// PUSH1 0xfe PUSH1 0x00 MSTORE8 PUSH1 0x01 PUSH1 0x00 RETURN
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initcode = common.FromHex("60fe60005360016000f3")
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)
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salt[31] = 0x42
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input := append(append([]byte{}, salt[:]...), initcode...)
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ret, _, err := amsterdamCoreEVM(sdb).Call(caller, params.DeterministicFactoryAddress, input, vm.NewGasBudget(10_000_000, 0), new(uint256.Int))
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if err != nil {
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t.Fatalf("factory call failed: %v", err)
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}
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want := crypto.CreateAddress2(params.DeterministicFactoryAddress, salt, crypto.Keccak256(initcode))
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if len(ret) != 20 {
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t.Fatalf("factory returned %d bytes, want 20", len(ret))
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}
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if got := common.BytesToAddress(ret); got != want {
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t.Fatalf("factory returned address %x, want %x", got, want)
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}
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if code := sdb.GetCode(want); !bytes.Equal(code, []byte{0xfe}) {
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t.Fatalf("deployed runtime code = %x, want fe", code)
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}
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}
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