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https://github.com/ethereum/go-ethereum.git
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110 lines
4.7 KiB
Go
110 lines
4.7 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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// EIP-8038 authorization accounting tests. The per-authorization intrinsic gas
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// pre-charges ACCOUNT_WRITE (regular) on top of REGULAR_PER_AUTH_BASE_COST.
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// applyAuthorization refunds that ACCOUNT_WRITE to the refund counter in exactly
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// the cases where no new account leaf is written: an invalid authorization, or
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// an authority whose account already exists. These white-box tests invoke
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// applyAuthorization directly and read the raw refund counter, so they observe
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// the refund before the EIP-3529 cap is applied.
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package core
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import (
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"math/big"
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"testing"
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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/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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// newAuthTestTransition builds a minimal stateTransition with a state reservoir,
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// suitable for calling applyAuthorization directly.
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func newAuthTestTransition(sdb *state.StateDB) *stateTransition {
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st := newStateTransition(amsterdamCoreEVM(sdb), &Message{}, NewGasPool(30_000_000))
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st.gasRemaining = vm.NewGasBudget(0, 1_000_000) // reservoir for state-gas refills
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return st
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}
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// A net-new delegation on a fresh authority writes a new account leaf, so the
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// intrinsic ACCOUNT_WRITE stands (no refund).
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func TestAuthAccountWriteNetNewNoRefund(t *testing.T) {
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auth, _ := signAuth(t, authKeyA, delegate8037, 0)
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st := newAuthTestTransition(mkState(senderAlloc(nil)))
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if err := st.applyAuthorization(rules8037, &auth, map[common.Address]bool{}); err != nil {
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t.Fatal(err)
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}
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if got := st.state.GetRefund(); got != 0 {
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t.Fatalf("refund = %d, want 0 (net-new account write)", got)
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}
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}
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// A pre-existing authority writes no new account leaf, so the intrinsic
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// ACCOUNT_WRITE is refunded.
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func TestAuthAccountWriteExistsRefund(t *testing.T) {
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auth, authority := signAuth(t, authKeyA, delegate8037, 0)
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st := newAuthTestTransition(mkState(senderAlloc(types.GenesisAlloc{authority: {Balance: big.NewInt(1)}})))
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if err := st.applyAuthorization(rules8037, &auth, map[common.Address]bool{}); err != nil {
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t.Fatal(err)
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}
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if got := st.state.GetRefund(); got != params.AccountWriteAmsterdam {
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t.Fatalf("refund = %d, want %d (account already exists)", got, params.AccountWriteAmsterdam)
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}
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}
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// An invalid authorization is skipped without writing any account leaf, so its
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// intrinsic ACCOUNT_WRITE is refunded.
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func TestAuthAccountWriteInvalidRefund(t *testing.T) {
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k, _ := crypto.HexToECDSA(authKeyA)
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bad, _ := types.SignSetCode(k, types.SetCodeAuthorization{
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ChainID: *uint256.NewInt(999), Address: delegate8037, Nonce: 0, // wrong chain id
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})
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st := newAuthTestTransition(mkState(senderAlloc(nil)))
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if err := st.applyAuthorization(rules8037, &bad, map[common.Address]bool{}); err == nil {
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t.Fatal("expected invalid-authorization error")
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}
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if got := st.state.GetRefund(); got != params.AccountWriteAmsterdam {
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t.Fatalf("refund = %d, want %d (invalid authorization)", got, params.AccountWriteAmsterdam)
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}
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}
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// The same authority across two authorizations writes its account leaf only
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// once: the first auth pays ACCOUNT_WRITE, the second (which now sees the
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// account as existing) is refunded.
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func TestAuthAccountWriteDuplicateOnce(t *testing.T) {
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a0, _ := signAuth(t, authKeyA, delegate8037, 0)
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a1, _ := signAuth(t, authKeyA, delegate8037, 1)
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st := newAuthTestTransition(mkState(senderAlloc(nil)))
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delegates := map[common.Address]bool{}
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if err := st.applyAuthorization(rules8037, &a0, delegates); err != nil {
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t.Fatal(err)
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}
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if got := st.state.GetRefund(); got != 0 {
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t.Fatalf("refund after first auth = %d, want 0", got)
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}
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if err := st.applyAuthorization(rules8037, &a1, delegates); err != nil {
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t.Fatal(err)
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}
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if got := st.state.GetRefund(); got != params.AccountWriteAmsterdam {
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t.Fatalf("refund after duplicate auth = %d, want %d", got, params.AccountWriteAmsterdam)
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}
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}
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