Weekly Check-in: Week of 2026-05-25

[payjoin-bot]

Weekly standup — each contributor has a thread below with auto-gathered activity.

Reply to your thread by end-of-day Monday (your timezone). Copy the template below and fill it in:

### Shipped
<!-- Add anything the bot missed: design work, specs, conversations, off-GitHub contributions. Correct any mistakes. Skip if the bot covered everything. -->

### Focus
What are you working on this week?

### Bottleneck
What is the single biggest bottleneck in progress toward your greater goal?
Name your goal. Name the constraint. Name who or what can unblock it.

Participated: @spacebear21, @chavic, @zealsham, @Mshehu5

[payjoin-bot]

DanGould

@DanGould

Shipped

PRs merged:

• Enforce single-owner contract on InMemoryPersister

PRs reviewed:

• Add C# SDK to nix dev shell

Last Week

Review your previous thread: Last week's thread

[payjoin-bot]

spacebear21

@spacebear21

Shipped

PRs reviewed:

• Add C# SDK to nix dev shell
• Nixify Javascript FFi tests
• Sender Pending Fallback state
• Remove redundant language from finalize_proposal rustdocs
• Add concurrent psbt repo

Last Week

Review your previous thread: Last week's thread

[spacebear21]

Focus

• Handoff in-flight work ahead of absence in the next two weeks

Bottleneck

• Receiver fallback typestate #1558 awaiting review

[benalleng]

I will followup on the bot's review comments on SatoshiPortal/bullbitcoin-mobile#2041 to try and decide what is actionable from its review

[payjoin-bot]

arminsabouri

@arminsabouri

Shipped

PRs merged:

• Remove reciever wordings from global ffi error type
• Add concurrent psbt repo
• Sender Pending Fallback state

PRs reviewed:

• devshell with rust tools
• non-nix based CI
• Justfiles
• nix checks based on Crane
• rust crate skeleton
• ci: checkout v6, efficient fetch-depth for PRs
• ci: checkout v6, efficient fetch-depth for PRs
• Front matter
• Use scrubbing tool in github CI
• Commit history scrubbing tool
• Enforce single-owner contract on InMemoryPersister
• Basic quality checks

Last Week

Review your previous thread: Last week's thread

Auto-detected signals:

• PR has requested changes: Add honest overview

[payjoin-bot]

benalleng

@benalleng

Shipped

PRs merged:

• Nixify Javascript FFi tests

PRs reviewed:

• Add C# SDK to nix dev shell
• Crane based nix derivations
• ci: checkout v6, efficient fetch-depth for PRs
• Fix LSP types, lints in Python and Typescript tests
• test(js): add smoke tests for web bindings

Last Week

Review your previous thread: Last week's thread

Auto-detected signals:

• PR awaiting review: Nixify ffi CI

[benalleng]

Focus

• Pyth reached out late last week so I am just keeping the liana PR up-to-date while he reveiws
• Going to try and review feat: Add accounting bridge and unify receiver outputs ValeraFinebits/btcpayserver-payjoin-plugin#41 for tx correctness

Bottleneck

Don't really know any csharp so I need to learn it if I am going to be helpful on reveiw there

[payjoin-bot]

chavic

@chavic

Shipped

PRs merged:

• Add C# SDK to nix dev shell

PRs reviewed:

• Nixify ffi CI
• Enforce single-owner contract on InMemoryPersister

Issues opened:

• Investigate flaky dart_async timing failures

Last Week

Review your previous thread: Last week's thread

[chavic]

Shipped:

Reviewed PRs in the BTCPay Payjoin plugin:

• Refactor payjoin receiver poller. refactor: refactor payjoin receiver poller ValeraFinebits/btcpayserver-payjoin-plugin#23
• Add receiver input reservations. feat: add receiver input reservations ValeraFinebits/btcpayserver-payjoin-plugin#25
• Persist bootstrap events. feat: Persist bootstrap events ValeraFinebits/btcpayserver-payjoin-plugin#26
• Add migrations project and refactor EF configs. refactor: Add migrations project and refactor EF configs ValeraFinebits/btcpayserver-payjoin-plugin#29
• Upgrade project target framework to .NET 10. build: upgrade project target framework to .NET 10 ValeraFinebits/btcpayserver-payjoin-plugin#36

PRs (BTCPay plugin, drafts opened):

• Handle initialized Payjoin poll timeouts quietly. Handle initialized Payjoin poll timeouts quietly ValeraFinebits/btcpayserver-payjoin-plugin#30
• Remove template database scaffolding. Remove template database scaffolding ValeraFinebits/btcpayserver-payjoin-plugin#31
• Align plugin with renamed bitcoin types. Align plugin with renamed FFI bitcoin types and units ValeraFinebits/btcpayserver-payjoin-plugin#32
• Add release mode for FFI package generation. Add release mode for FFI package generation ValeraFinebits/btcpayserver-payjoin-plugin#33
• Add restart replay integration coverage. Add restart replay integration coverage ValeraFinebits/btcpayserver-payjoin-plugin#34

PRs (uniffi-dart, open):

• Test Nix dev shell setup. Test Nix dev shell setup Uniffi-Dart/uniffi-dart#136
• Complete callback interface follow-ups. Complete callback interface followups Uniffi-Dart/uniffi-dart#137
• Register recursive type helpers. Register recursive type helpers Uniffi-Dart/uniffi-dart#138
• New uniffi-dart beta tracking roadmap. Beta readiness roadmap Uniffi-Dart/uniffi-dart#141
• Stale-issue triage pass across uniffi-dart closed: Implement HashMap/Map Type Support Uniffi-Dart/uniffi-dart#63 Implement Sequence/List Collection Types Uniffi-Dart/uniffi-dart#67 Add Dictionary Default Values Support Uniffi-Dart/uniffi-dart#68 Add Missing Build Dependencies Uniffi-Dart/uniffi-dart#74 Fix flaky async tests Uniffi-Dart/uniffi-dart#105 Follow-up: finish callback compound-type coverage and CI integration Uniffi-Dart/uniffi-dart#118 dart_async sleep timing test is too strict and fails on clean runs Uniffi-Dart/uniffi-dart#123

PRs (rust-payjoin):

• C# SDK in nix dev shell merged. Add C# SDK to nix dev shell #1559

Focus:

• Land the BTCPay own-batch, bring cleaning up 30–34 review.
  • Handle initialized Payjoin poll timeouts quietly ValeraFinebits/btcpayserver-payjoin-plugin#30
  • Remove template database scaffolding ValeraFinebits/btcpayserver-payjoin-plugin#31
  • Align plugin with renamed FFI bitcoin types and units ValeraFinebits/btcpayserver-payjoin-plugin#32
  • Add release mode for FFI package generation ValeraFinebits/btcpayserver-payjoin-plugin#33
  • Add restart replay integration coverage ValeraFinebits/btcpayserver-payjoin-plugin#34
• Review Valera's accounting bridge. feat: Add accounting bridge and unify receiver outputs ValeraFinebits/btcpayserver-payjoin-plugin#41
• Clearing past backlog:
  • 3 drafts in BTCPay
  • Demo video.
  • Technical article, apply insights from comments from Dan, then done.
  • uniffi-dart callback interface coverage follow-ups under review Implement Callback Interface Support Uniffi-Dart/uniffi-dart#65 Complete callback interface followups Uniffi-Dart/uniffi-dart#137
  • uniffi-dart type helpers for aliases, compounds & callback args. fix: type helpers for aliases, compounds & callback args Uniffi-Dart/uniffi-dart#124 will need review
  • Convert payjoin-cli E2E into a default CI-covered sender/receiver loop.

Blockers:

• I'm still thinking about the UX side of Payjoin in BTCPay, still being defined.

[payjoin-bot]

zealsham

@zealsham

Shipped

No activity found.

Last Week

Review your previous thread: Last week's thread

Auto-detected signals:

• PR has requested changes: Fix resume succeding prematurely
• PR has requested changes: OHTTP keys should be rotated

[zealsham]

Focus

• OHTTP keys should be rotated #1449 fix any review that comes up for the latest commit
• Fix resume succeding prematurely #1573 implement review changes
• Implement Http tracing for payjoin-mailroom Payjoin Mailroom Tracking Issue #941
• update Payjoin-cli should cache ohttp-keys for re-use #1035 to start matching OHTTP keys should be rotated #1449
• feat: implement ohttp gateway middleware #1306 picking this up if harshdev doesnt reply

[payjoin-bot]

Mshehu5

@Mshehu5

Shipped

No activity found.

Last Week

Review your previous thread: Last week's thread

[Mshehu5]

Shipped:

• continued work on asmap feature in [WIP] Add AS-aware relay selection #1514 got some intial reviews.
• Added an e2e test to show behaviour/report

Focus:

• Address current review comments. One thing to decide on is if new changes to payjoin crate for asmap feature should remain on [WIP] Add AS-aware relay selection #1514 or move them to seperate PR's
• setting up a talk for Btc plus plus event soon

[spacebear21]

@Mshehu5 would you like to lead the mob review tomorrow with the bdk-cli PR?

[Mshehu5]

Yeah , happy to

[payjoin-bot]

0xZaddyy

@0xZaddyy

Shipped

No activity found.

Last Week

Review your previous thread: Last week's thread

[ValeraFinebits]

Shipped

PRs opened:

• build: upgrade project target framework to .NET 10 ValeraFinebits/btcpayserver-payjoin-plugin#36
• feat: Add accounting bridge and unify receiver outputs ValeraFinebits/btcpayserver-payjoin-plugin#41

Testing:

• Testing the Payjoin plugin on a public BTCPay Server testnet instance.

Focus

• Continue working on the plugin.

[caarloshenriq]

/check-in

[payjoin-bot]

Shipped

PRs merged:

• test(js): add smoke tests for web bindings

PRs reviewed:

• Nixify ffi CI
• Add C# SDK to nix dev shell
• Add concurrent psbt repo

[caarloshenriq]

Focus

• finish no_std implementation

Bottleneck

I will be traveling from May 26th to June 2nd for events at Casa Vinteum and may have limited availability during this time

[bc1cindy]

@bc1cindy

Shipped

• 4 counting subset sum methods in dense-subset-sum

PRs opened:

• Document ohttp relay best practice #1547
• Add radix-ness classifier as first step of the radix lower-bound path tx-indexer#85

PRs reviewed:

• rust crate skeleton concurrent-psbt#8
• non-nix based CI concurrent-psbt#14
• add .envrc with flake provided devshell concurrent-psbt#16
• [WIP] Add AS-aware relay selection #1514

Issues:

• Add radix-based lower bound for sub-transaction mappings tx-indexer#84
• Document best client-side BIP-77 health check practice (if any) #1328

Focus

• reviews
• radix path to tx-indexer
• ohttp-relay + asmap

[xstoicunicornx]

/check-in

[payjoin-bot]

Shipped

PRs merged:

• Fix LSP types, lints in Python and Typescript tests

PRs reviewed:

• Fix resume succeding prematurely
• Sender Pending Fallback state
• Dedup utxos locked method
• Remove reciever wordings from global ffi error type

PRs updated:

• Ready for review - Non-blocking Interface for Payjoin State Machine  #1446

Focus

• Finish review for Receiver fallback typestate #1558

Bottleneck

• Awaiting reviews on Non-blocking Interface for Payjoin State Machine  #1446

[va-an]

/check-in

[payjoin-bot]

Shipped

Issues opened:

• cli: reconsider version flag semantics
• Keep tutorial code in sync with rust-payjoin

Auto-detected signals:

• PR awaiting review: fix(cli): v1 config rejecting endpoints without explicit port

[va-an]

Focus

• fix(cli): v1 config rejecting endpoints without explicit port #1576

Bottleneck

• Awaiting review on fix(cli): v1 config rejecting endpoints without explicit port #1576
• Awaiting comments / concept ACK on:
  • Keep tutorial code in sync with rust-payjoin payjoin.org#140
  • Update "Receive Payjoin V2" tutorial to current API payjoin.org#139