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Expose payment failure reason on PaymentFailed event - #263

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elnafateh:expose-payment-failure-reason
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Expose payment failure reason on PaymentFailed event#263
elnafateh wants to merge 1 commit into
lightningdevkit:mainfrom
elnafateh:expose-payment-failure-reason

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@elnafateh

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Closes part of #251.

PaymentFailed currently drops the reason field that LDK Node already provides. This adds it as an optional PaymentFailureReason enum on the proto event, mapped 1:1 from lightning::events::PaymentFailureReason.

  • New PaymentFailureReason enum in events.proto, mirrors LDK's variants
  • payment_failure_reason_to_proto() mapping function, wired into the event handler
  • Unit test covering all 10 variants
  • E2e test updated to assert reason is populated

The other items in #251 (splice events, channel snapshot fields, on-chain tx classification, misc fields) are left for follow-up PRs.

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ldk-reviews-bot commented Aug 28, 2026

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👋 Thanks for assigning @benthecarman as a reviewer!
I'll wait for their review and will help manage the review process.
Once they submit their review, I'll check if a second reviewer would be helpful.

Comment thread ldk-server/src/main.rs Outdated
Comment thread e2e-tests/tests/e2e.rs Outdated
Comment thread e2e-tests/tests/e2e.rs Outdated
@elnafateh
elnafateh requested a review from benthecarman August 28, 2026 10:59
@benthecarman

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Please squash your commits

@elnafateh
elnafateh force-pushed the expose-payment-failure-reason branch from 610e574 to 988759c Compare August 28, 2026 22:36
@elnafateh

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Please squash your commits

it's done

@benthecarman benthecarman left a comment

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can you remove the link to the issue in the commit message, it causes spam in github, otherwise looks good to me

@elnafateh

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can you remove the link to the issue in the commit message, it causes spam in github, otherwise looks good to me

ok

Adds PaymentFailureReason to the PaymentFailed proto event, mapped
from ldk-node's lightning::events::PaymentFailureReason.
@elnafateh
elnafateh force-pushed the expose-payment-failure-reason branch from 988759c to 46228c2 Compare August 28, 2026 22:44
@elnafateh

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can you remove the link to the issue in the commit message, it causes spam in github, otherwise looks good to me

ok

it's been dropped

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3 participants