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Add Payjoin Receiver Support#746

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Camillarhi wants to merge 1 commit intolightningdevkit:mainfrom
Camillarhi:payjoin-receiver
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Add Payjoin Receiver Support#746
Camillarhi wants to merge 1 commit intolightningdevkit:mainfrom
Camillarhi:payjoin-receiver

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@Camillarhi
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@Camillarhi Camillarhi commented Jan 8, 2026 •
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This PR adds support for receiving payjoin payments in LDK Node. This is currently a work in progress and implements the receiver side of the payjoin protocol.

  • Add session store for persisting payjoin receiver events across restarts
  • Implement KVStorePayjoinReceiverPersister to handle session persistence
  • Add Payjoin as a PaymentKind to the payment store
  • Add event polling mechanism for active payjoin sessions
  • Wire up payjoin payment request and receive flows

Note on persistence: The payjoin library currently only supports synchronous persistence, but they're working on adding async support(payjoin/rust-payjoin#1235). This PR sets up the persistence structure (KVStorePayjoinReceiverPersister), which will be updated to use async operations once the upstream PR is merged.

This PR will partially address #177

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ldk-reviews-bot commented Jan 8, 2026

👋 Hi! I see this is a draft PR.
I'll wait to assign reviewers until you mark it as ready for review.
Just convert it out of draft status when you're ready for review!

@DanGould DanGould mentioned this pull request Jan 9, 2026
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DanGould commented Jan 23, 2026

We've merged the async persistence PR you mentioned. You might want to build your draft PR on the merged commit from there on until we cut you a release.

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Camillarhi commented Jan 23, 2026

We've merged the async persistence PR you mentioned. You might want to build your draft PR on the merged commit from there on until we cut you a release.

Thanks for letting me know. I'll build on the merged commit.

@Camillarhi Camillarhi force-pushed the payjoin-receiver branch 5 times, most recently from 8f6ba65 to 6499918 Compare January 30, 2026 10:36
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DanGould commented Feb 10, 2026

Are you stuck? Did something in our library break CI @Camillarhi

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Camillarhi commented Feb 10, 2026

Are you stuck? Did something in our library break CI @Camillarhi

Not stuck at all. I was just closing out some other PRs. Still working on this one, I'll let you know when it's ready.

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@Camillarhi @ldk-reviews-bot @DanGould