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eb7aef45a7
This PR addresses a flakiness in the rollback test discussed in https://github.com/ethereum/go-ethereum/issues/32252 I found `nonce` collision caused transactions occasionally fail to send. I tried to change error message in the failed test like: ``` if err = client.SendTransaction(ctx, signedTx); err != nil { t.Fatalf("failed to send transaction: %v, nonce: %d", err, signedTx.Nonce()) } ``` and I occasionally got test failure with this message: ``` === CONT TestFlakyFunction/Run_#100 rollback_test.go:44: failed to send transaction: already known, nonce: 0 --- FAIL: TestFlakyFunction/Run_#100 (0.07s) ``` Although `nonces` are obtained via `PendingNonceAt`, we observed that, in rare cases (approximately 1 in 1000), two transactions from the same sender end up with the same nonce. This likely happens because `tx0` has not yet propagated to the transaction pool before `tx1` requests its nonce. When the test succeeds, `tx0` and `tx1` have nonces `0` and `1`, respectively. However, in rare failures, both transactions end up with nonce `0`. We modified the test to explicitly assign nonces to each transaction. By controlling the nonce values manually, we eliminated the race condition and ensured consistent behavior. After several thousand runs, the flakiness was no longer reproducible in my local environment. Reduced internal polling interval in `pendingStateHasTx()` to speed up test execution without impacting stability. It reduces test time for `TestTransactionRollbackBehavior` from about 7 seconds to 2 seconds. |
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| .. | ||
| backend.go | ||
| backend_test.go | ||
| options.go | ||
| options_test.go | ||
| rollback_test.go | ||