services/horizon: Return 503 error in POST /transactions if Stellar-Core not synced #3653
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PR Checklist
PR Structure
otherwise).
services/friendbot
, orall
ordoc
if the changes are broad or impact manypackages.
Thoroughness
.md
files, etc... affected by this change). Take a look in the
docs
folder for a given service,like this one.
Release planning
needed with deprecations, added features, breaking changes, and DB schema changes.
semver, or if it's mainly a patch change. The PR is targeted at the next
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What
This commit changes
POST /transactions
behaviour to return503 Service Unavailable
(stale_history
) instead of504 Gateway Timeout
(timeout
) response if connected Stellar-Core is not synced.Close #3550.
Why
timeout
error is confusing when the connected Stellar-Core is not synced because it means that the transaction has been broadcasted but there is no result yet. What actually happens is that the transaction is not broadcasted (and Horizon cannot ingest it) when Stellar-Core is not in synced. The new response is returned as soon as Horizon determines that the Stellar-Core status has changed.Known limitations
[TODO or N/A]