Sandbox::https://github.com/erpc/erpc/pull/1431

kasrakhosravi · 2026-11-09T13:15:28Z

nonce too high had no normalizer rule
Fell to server-side fallback: retried, tripped breaker
On main: 1 refusal → 6 upstream calls, both breakers open
Now execution exception: never counts toward the breaker
Every method keeps failover: a lagging upstream misreads the nonce
Failover runs in the upstream sweep: no network retry policy needed
Refusing upstream not asked again; ≤3 calls per send
Broadcast consensus waits for outstanding participants after a node-local refusal (12b, 12c)
Behavior change: other retryable execution exceptions (12b, 13 tracing, 14 sends, send reverts) also sweep without a network retry
Variants: geth/reth/Nethermind, Besu (-32006, too distant), Erigon (nonce gap too large)
Docs: errors reference rule 12c, gotchas 30-31
Tests: NonceTooHighEverywhereKeepsBreakersClosed, fails on main
Tests: NonceTooHighFromLaggingUpstream* (no network retry, retry, consensus broadcast, consensus only)
Lab 843: breakers never reopen after the outage (main: 4)
Context: OpenZeppelin Relayer fix: honor WithRetryableTowardNetwork(false) at network scope #843 failover lab

- Fell to the server-side fallback: retried on every upstream, counted toward the breaker. - A relayer's nonce gap opened the breakers and refused its reads too.

github-actions · 2026-11-09T13:15:50Z

	File	Lines	Key changes	Risk
🟠	error_normalizer.go	`+32/-0`	—	⚠ ErrEndpointExecutionException, ErrJsonRpcExceptionInternal
🟠	errors.go	`+16/-0`	`IsRetryableExecutionException`	⚠ ErrCodeEndpointExecutionException
🟠	networks.go	`+6/-2`	—	⚠ ErrCodeEndpointExecutionException
	1 test files	`+232`

_{xray — see through AI slop with deterministic architecture PR diff reviews}

graphify-labs · 2026-11-09T13:19:25Z

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kasrakhosravi · 2026-11-09T14:21:48Z

Lab check: relayer-failure-lab scenario 843 (OpenZeppelin Relayer v1.9.0), eRPC in front of 2 strict-nonce upstreams, 60 s HTTP 503 on both.

build	breaker	`nonce too high` upstream replies	breaker opens after outage	refused `eth_getTransactionCount`
main `a788b61`	none	2600	–	0
this PR	none	1300	–	0
main `a788b61`	20/80, 5m	649	4 (+286…+590 s)	7423
this PR	20/80, 5m	1575	0	0

Unfixed: each refusal hits both upstreams.
Unfixed: refusals reopen breakers, then reads fail.
Fixed: breakers open only inside the 503 window.
Relayer nonce drift unchanged (32–38): Relayer-side, fix: honor WithRetryableTowardNetwork(false) at network scope #843.

aramalipoor · 2026-11-12T15:04:56Z

@kasrakhosravi we need to ensure this doesn't conflict with how we do safe nonce via consensus and sendTx broadcasting, basically no degradation in the write/send flows via erpc when there are multiple upstreams with differing views

- A lagging upstream reads the correct next nonce as a gap; a final verdict ended the send there

kasrakhosravi · 2026-11-13T10:03:16Z

@aramalipoor good call, it did conflict. The first commit (70ec9a6) made nonce too high final for every method. An upstream that has not applied the sender's last mined tx reads the correct next nonce as a gap, so a send stopped at that one stale upstream and never reached a fresh one.

Fixed in 6dce2b8:

eth_sendRawTransaction: nonce too high keeps failover to other upstreams; the refusing upstream is not asked again
consensus broadcast (4 participants, agreement 1): a lagging upstream's refusal no longer ends the round; a fresh upstream's tx hash wins
all other methods: still final, 1 upstream
every case: execution exception, so it never counts toward the breaker; the eth_getTransactionCount (pending) reads a relayer needs stay served
safe-nonce reads via consensus: untouched, they never hit this path

Tests, lagging upstream + fresh upstreams:

test	`70ec9a6`	main	`6dce2b8`
`NonceTooHighFromLaggingUpstreamFailsOverToFreshUpstream`	fail	pass	pass
`NonceTooHighFromLaggingUpstreamDoesNotEndBroadcast`	fail	pass	pass
`NonceTooHighEverywhereKeepsBreakersClosed`	pass (as `NonceTooHighIsFinal…`)	fail	pass

A real gap on every upstream: ≤3 upstream calls per send (main: 6, breakers open). Not re-run: relayer lab 843 on 6dce2b8.

…errors - 6dce2b8 failed over only through a network retry round; with no network failsafe the lagging upstream's nonce too high reached the client (20 of 20 sends).

kasrakhosravi · 2026-11-13T11:41:10Z

Lab re-run: relayer-failure-lab 843, Relayer v1.9.0, 2 strict-nonce upstreams, 60 s HTTP 503 on both.

Found on 6dce2b8: failover needed a network retry policy.

Sweep returned on any execution exception
No network failsafe: 20 of 20 sends got the lagging upstream's refusal (main: 0)
e88bc15: sweep continues on retryable execution exceptions
NonceTooHighFromLaggingUpstreamFailsOverToFreshUpstream/NoNetworkRetry: fails on 6dce2b8, passes now

Breaker 20/80, halfOpenAfter: 5m:

build	breaker opens (s after outage start)	reopens after outage	refused `eth_getTransactionCount`	transfers landed /360
main `a788b61`	+44, +349, +351, +655, +715	4	7663	160
`6dce2b8`	+35, +38	0	1232	119
`e88bc15`	+41	0	0	360

No breaker:

build	runs	`nonce too high` upstream replies	drift, last 300 s
main `a788b61`	2	2922, 2602	33–39, 32–33
`70ec9a6`	1	1351	33–35
`6dce2b8`	2	4383, 1384	65–102, 33–38
`e88bc15`	1	2600	33

Opens inside the 503 window are real outages; 5 m halfOpenAfter then refuses reads
6dce2b8's 1232 refusals: both breakers opened in the window
Drift varies run to run: 6dce2b8 gave 65–102, then 33–38
e88bc15 asks both upstreams per refusal, like main, but no breaker count
Relayer drift (32+) unchanged: Relayer-side, fix: honor WithRetryableTowardNetwork(false) at network scope #843
Local: ForwardLlamaRPCEndpointRateLimitResponseSingle fails on main too

…ls over on every method - consensus-only broadcast (no retry/hedge) returned a lagging node's nonce too high though 3 upstreams accepted; main returned the hash - e88bc15 made nonce too high final for eth_call/eth_estimateGas/eth_sendRawTransactionSync; main failed over

kasrakhosravi · 2026-11-13T13:22:50Z

Adversarial pass on e88bc15 (fresh agent, change + claims only, runs vs main a788b61). 2 regressions found, fixed in 455f97f.

finding on `e88bc15`	main	`455f97f`
Consensus broadcast, no retry/hedge, lagging node answers first: client gets `nonce too high`	accepted hash	accepted hash
`eth_call` / `eth_estimateGas` with a nonce, lagging node: final at 1 upstream	fails over	fails over

Consensus: consensus_error_threshold short-circuit treated the refusal (threshold 1) as agreement
Fix: tx broadcasts skip that short-circuit for retryable execution exceptions while participants remain
Test: NonceTooHighFromLaggingUpstreamDoesNotEndBroadcast/ConsensusOnly, fails on e88bc15
Nonce rule now retryable toward network for every method, not only eth_sendRawTransaction
Behavior change kept, documented (gotcha 31): 12b/13/14 retryable execution exceptions sweep without network retry; main reached them only via network retry
Not changed: upstream-level retry still re-asks the refusing upstream (same on main; default MaxAttempts: 1)
Lab not re-run on 455f97f: lab has no consensus, sends already failed over

fix(evm): treat nonce too high as a final client error

70ec9a6

- Fell to the server-side fallback: retried on every upstream, counted toward the breaker. - A relayer's nonce gap opened the breakers and refused its reads too.

kasrakhosravi deployed to xray November 9, 2026 13:15 — with GitHub Actions Active

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fix(evm): keep eth_sendRawTransaction failover on nonce too high

6dce2b8

- A lagging upstream reads the correct next nonce as a gap; a final verdict ended the send there

kasrakhosravi deployed to xray November 12, 2026 17:56 — with GitHub Actions Active

aramalipoor self-requested a review November 13, 2026 10:05

fix(evm): fail over within the upstream sweep on retryable execution …

e88bc15

…errors - 6dce2b8 failed over only through a network retry round; with no network failsafe the lagging upstream's nonce too high reached the client (20 of 20 sends).

kasrakhosravi deployed to xray November 13, 2026 11:40 — with GitHub Actions Active

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fix(evm): treat nonce too high as a final client error - #1431

fix(evm): treat nonce too high as a final client error#1431
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