fix(arweave): reject pending transactions in the tx-data source - #906
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ArweaveCompositeClient.getData reads `/tx/{id}/data` and
`/tx/{id}/data_size` from the trusted node. For a transaction the node knows
but has not mined, both answer `202` with the text "Pending". The trusted
node's axios instance accepts any 2xx, so getData base64url-decoded "Pending"
as the transaction's data and computed its size with `+"Pending"`, i.e. NaN.
Seen during a soak on develop: requesting such a transaction logged
`Invalid price format: $NaN` from x402 pricing, and `Value is not a valid
number: NaN` as an uncaught exception, thrown by the byte histogram inside
the stream's 'end' listener. A NaN size also makes the rate limiter predict
NaN tokens; the Redis bucket script then consumes nothing (checked against a
scratch Redis), so such a request skips token accounting, though the stored
bucket is not corrupted.
getData now:
- accepts only 200 answers from both routes;
- requires `data_size` to be a non-negative safe integer;
- rejects data whose decoded length differs from `data_size` (checked
against five format-1 transactions a node serves in full: all match);
- skips the byte metrics for a non-finite size, because a throwing 'end'
listener also stops the listeners registered after it.
Each failure throws, so the request falls through to the next source.
New tests cover a mined transaction (full and range), a pending one, an
invalid size, a length mismatch and a non-finite region size; removing any
one guard fails exactly its test.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EExbqiSKPLAtqxPLkdGqK3
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Included review availability: Your plan provides up to 2 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe tx-data source now accepts only successful node responses, validates ChangesTransaction data validation
Priority: ➖ Normal Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix · Severity of issue fixed: Medium Merge Risk: ⚪ Minimal · up to No concrete merge-blocking issue remains in the supplied review context. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Inline comments:
In `@src/arweave/composite-client.ts`:
- Around line 1785-1788: Update the getData method’s TSDoc to document the
required successful response status, payload size validation, and behavior when
a data region is requested, while retaining the existing explanation of pending
responses.
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CHANGELOG.mdsrc/arweave/composite-client.test.tssrc/arweave/composite-client.ts
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## develop #906 +/- ##
===========================================
+ Coverage 82.29% 82.51% +0.22%
===========================================
Files 149 149
Lines 61914 61956 +42
Branches 4971 4993 +22
===========================================
+ Hits 50951 51124 +173
+ Misses 10899 10774 -125
+ Partials 64 58 -6 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01EExbqiSKPLAtqxPLkdGqK3
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Problem
ArweaveCompositeClient.getData(thetx-dataretrieval source) reads/tx/{id}/dataand/tx/{id}/data_sizefrom the trusted node. For a transaction the node knows but hasn't mined, both routes answer202with the textPending:The trusted node's axios instance accepts any 2xx response. As a result,
getData:"Pending"as the transaction's data, producing a few junk bytes;+"Pending", which isNaN.Seen on a gateway soaking
develop, for a request that fell through totx-data:Error during payment processing: Invalid price format: $NaN.Value is not a valid number: NaN. The byte histogram threw inside the stream'sendlistener. A listener that throws also stops theendlisteners registered after it.Math.max(1, Math.ceil(NaN / 1024)), which isNaN. With that count, the Redis bucket script consumes nothing, so the request skipped rate-limit accounting. Checked against a scratch Redis: the stored bucket is not corrupted.The code dates from 2024, so this is pre-existing, not a recent regression.
Fix
getDatanow:200answers from both routes, so202 Pendingthrows;data_sizeto be a non-negative safe integer;data_size;endlistener.Each rejection throws, so the request falls through to the next source.
The length check was confirmed against real data. For five format-1 transactions that a node serves in full (
200), decoded length equalsdata_sizeexactly. For format-2 transactions the route answers404, which already threw.The rate limiter is unchanged. With the source fixed, it no longer receives
NaN.Tests
New
getDatatests:endlisteners added later still run;202 Pending);endlisteners still run.Removing any one of the four guards fails exactly its own test.
Verification
composite-client.test.ts: 25/25 pass.yarn test: 2537 tests, 2532 pass, 4 skipped, 1 failure. The failure isparquet-exporter, which needs GLIBC 2.32 and also fails ondevelopon this host.yarn buildandyarn lint:check: pass.yarn typecheck: 433 errors, the same count asdevelop, and none in the changed files.🤖 Generated with Claude Code