Weekly Check-in: Week of 2026-08-03

[payjoin-bot]

Weekly standup — comment /check-in by end-of-day Monday (your timezone) for an auto-gathered activity thread.

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: @chavic, @DanGould, @benalleng

[chavic]

/check-in

[payjoin-bot]

Shipped

PRs reviewed:

• Expose PjParam::receiver_pubkey() over FFI

Issues opened:

• Share one conceptual description of payjoin across the package READMEs

Auto-detected signals:

• PR has requested changes: Make the C# package README user-facing

[chavic]

Shipped

Merged BTCPay Payjoin plugin (own):

• Enforce the segwit assumptions on both sides of a payjoin, built on the txid stability accessor from [#1718](Expose proposal txid stability on receiver states #1718). [#78](Enforce the segwit assumptions on both sides of a payjoin ValeraFinebits/btcpayserver-payjoin-plugin#78)
• Bump rust-payjoin to 1.0.0-rc.6. [#112](Bump rust-payjoin to 1.0.0-rc.6 ValeraFinebits/btcpayserver-payjoin-plugin#112)

Opened BTCPay Payjoin plugin (draft):

• Add wallet-side async payjoin sending: the store's hot wallet pays a BIP 77 URI through a persisted sender session that posts, polls, signs, and broadcasts in the background, with the original transaction as automatic fallback. [#113](Add wallet-side async payjoin sending ValeraFinebits/btcpayserver-payjoin-plugin#113)

Merged rust-payjoin (review):

• Expose PjParam receiver_pubkey over FFI. [#1771](Expose PjParam::receiver_pubkey() over FFI #1771)

Reviews (BTCPay Payjoin plugin):

• Bump version to 0.3.0 (merged). [#100](chore: bump version to 0.3.0 ValeraFinebits/btcpayserver-payjoin-plugin#100)
• Label async payjoin settlement transactions (merged). [#104](feat: Label async payjoin settlement transactions ValeraFinebits/btcpayserver-payjoin-plugin#104)
• Make the Async Payjoin overview about the effective fallback (merged). [#105](fix: Make the Async Payjoin overview about the effective fallback ValeraFinebits/btcpayserver-payjoin-plugin#105)
• Report why Payjoin v2 is unavailable instead of a boolean (open). [#110](feat: Report why Payjoin v2 is unavailable instead of a boolean ValeraFinebits/btcpayserver-payjoin-plugin#110)

Focus

• Wallet-side sending draft #113.
• Get the C# package README #1764 and tag-based OIDC publishing #1767 through review, so the next NuGet release after Payjoin 0.24.0-preview.1 is fully automated and user-facing.

Blockers

• The last four plugin PRs of the correctness pass await review and merge: accounting reset, OHTTP key refresh, fallback broadcast, and fee estimation.

[DanGould]

/check-in

[payjoin-bot]

Shipped

PRs merged:

• Add Foundation page
• Add dangould release signing key
• Expose PjParam::receiver_pubkey() over FFI

PRs reviewed:

• Make the C# package README user-facing
• Automate crates.io releases
• Unify mailbox ShortId derivation

Issues opened:

• is set_output_substitution is dead under a v2-only lint (payjoin/src/core/uri/mod.rs:256)

[DanGould]

Shipped

The bot only sees payjoin-org repos, so it missed the Wasabi work:

WalletWasabi BIP 77 integration**

• [BIP-77 2 of 5] Recognize BIP 77 pj endpoints and preserve pjos in BIP 21 parsing WalletWasabi/WalletWasabi#14880 BIP 77 pj endpoint recognition + pjos preservation in BIP 21 parsing. First BIP-77 code in Wasabi master.
• [BIP-77 1 of 5] Keep PayJoinEndPoint armed across the send screen's "To" re-parse WalletWasabi/WalletWasabi#14874 closed in favor of
  • lontivero's Fix recursive parsing and validations WalletWasabi/WalletWasabi#14876 which fixes the same PayJoinEndPoint clearing in their UI pref
• [DO NOT MERGE, BIP-77] end-to-end Async Payjoin Integration Demo WalletWasabi/WalletWasabi#14875 open as a draft
  end-to-end demo for testers.

payjoin.org

• Live payjoin demo behind a driver interface, with the homepage pointed at it instead
  of the Figma prototype. First browser WASM build of payjoin-ffi/javascript. This was procrastination

Focus

Hand off dev, get to mailroom tasks

Bottleneck

Integrations coordination going through me

[ValeraFinebits]

Shipped

PRs opened:

• feat: Report why Payjoin v2 is unavailable instead of a boolean ValeraFinebits/btcpayserver-payjoin-plugin#110

PRs reviewed:

• Suppress the AngleSharp advisory breaking all CI builds ValeraFinebits/btcpayserver-payjoin-plugin#98
• Bump Microsoft.NET.Test.Sdk from 18.5.1 to 18.8.1 ValeraFinebits/btcpayserver-payjoin-plugin#106
• Bump NBXplorer.Client from 5.0.6 to 5.0.7 ValeraFinebits/btcpayserver-payjoin-plugin#107
• Increase per-request OHTTP relay timeout from 10s to 30s ValeraFinebits/btcpayserver-payjoin-plugin#108
• Bump rust-payjoin to 1.0.0-rc.6 ValeraFinebits/btcpayserver-payjoin-plugin#112

PRs merged:

• Bump Microsoft.NET.Test.Sdk from 18.5.1 to 18.8.1 ValeraFinebits/btcpayserver-payjoin-plugin#106
• Bump NBXplorer.Client from 5.0.6 to 5.0.7 ValeraFinebits/btcpayserver-payjoin-plugin#107
• Bump rust-payjoin to 1.0.0-rc.6 ValeraFinebits/btcpayserver-payjoin-plugin#112

Issues opened:

• Use local directory and relay from test_tools in integration tests ValeraFinebits/btcpayserver-payjoin-plugin#109
• Distinguish "no confirmed receiver coins" from "coins exist but are policy-ineligible" in payjoin availability ValeraFinebits/btcpayserver-payjoin-plugin#111

Focus

• Continue working on the plugin.

[benalleng]

/check-in

[payjoin-bot]

Shipped

PRs merged:

• Add benalleng release signing key

PRs reviewed:

• Remove output substitution test helper
• Automate crates.io releases

[benalleng]

Shipped

• Last week was halted abruptly on Friday by Cold-card damage control for friends and family
• Went thorugh review cycles with Su on the cake-wallet PR. Reached out to Konstantin for a timeline on when they might put it in the sprint.

Focus

• 1.0 release?
• review
• We need to give the payjoin-bot access to write PRs again for our weekly update workflows

Bottleneck

• With the cake wallet stuff now waiting on cake I guess I can bring my focus back in to the repo to start to organize all of the post-1.0 stuff we have planned

[xstoicunicornx]

/check-in

[payjoin-bot]

Shipped

PRs merged:

• Add and Revise Receiver Interface Comments
• Add comments to FFI interface

PRs reviewed:

• Make the C# package README user-facing
• Keep receiver input failures recoverable
• fix(payjoin-ffi): validate brew and llvm on macOS
• Unify mailbox ShortId derivation

[xstoicunicornx]

Shipped

• Lite QA for Cake wallet payjoin upgrade

Focus

• Reviewing issues

Bottleneck

I will be "out of office" Aug 7 - 11 this week (will miss next week's standup).

[spacebear21]

/check-in

[payjoin-bot]

Shipped

PRs merged:

• Bump dart payjoin 0.2.0 for pub.dev
• Bump payjoin to version 1.0.0-rc.7
• Automate crates.io releases

PRs reviewed:

• Enable external-sources for shellcheck formatting.
• Add benalleng release signing key
• Add dangould release signing key
• Add and Revise Receiver Interface Comments

Issues opened:

• Release payjoin-1.0.0-rc.7

[DanGould]

regarding using semver with strange versions like 0.2.0-1.0.0 where we're linking both the target bindings lang. ver. as well as the payjoin version underneath, how is that handled at each lang? will it resolve semver properly