Weekly Check-in: Week of 2026-07-27

[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: @DanGould, @benalleng, @caarloshenriq, @spacebear21, @chavic, @xstoicunicornx, @zealsham

[DanGould]

/check-in

[payjoin-bot]

Shipped

PRs merged:

• Bump payjoin-cli version to 1.0.0-rc.1
• Bump payjoin to version 1.0.0-rc.6
• Pre-1.0 Doorkeeper for SessionOutcome in

PRs reviewed:

• Insulate bitcoin uri
• Restore ScriptBuf and Witness test imports

Issues opened:

• Release 1.0.0-rc.6

Auto-detected signals:

• PR awaiting review: [2-week comment period thru 26/08/07] 1.0 CONTRIBUTING.md changes: PR/Issue Scope, SECURITY.md, Licensing
• PR awaiting review: Preserve mailroom metrics privacy
• PR awaiting review: Depend on rust-bitcoin crypto primitive impls

[DanGould]

Shipped

• Wasabi BIP 77 integration built e2e on the bench w/ video demos, PRs incoming. Reference + uniffi bindings + api design + agents made this unbelievably easy vs hand-rolling Mutiny, BBMobile, Cake. Wow what a difference.
• Payjoin 0.24.0-preview.1 (depending on payjoin-1.0.0-rc.6) published to nuget.org
• Crypto-dependency de-risking for 1.0 patches with updates to bitcoin-hpke/bitcoin-ohttp inbound to remove sha2, chacha20poly1305, and aes-gcm crates from payjoin's dependency tree
• BIP 77 Draft to Complete transition, four spec PRs drafted and need to get pushed + pjv2 receiver-enforced payjoin needs merge to call in "complete"
• URI layer-1 / bitcoin_uri 0.2 design & review: basically everyone is having bitcoin URI problems and we don't have a universal crate but I came up with a plan to migrate there without breaking 1.0, which is why we insulated it last week
• Ran loupe on payjoin-1.0.0-rc.6 & mailroom as a pre-audit audit

Focus

• Getting the Wasabi integration PRs up (prolific integrations are my committed north star for the year), and work in general across the last mile with relational communication. Humans get all the work done :)
• Reviewing what needs to be reviewed for 1.0
• Perhaps a payjoin-cli loupe run to validate payjoin-cli is 1.0 ready as well.

Bottleneck

• Focus on one thing at a time

[benalleng]

/check-in

[payjoin-bot]

Shipped

PRs reviewed:

• Pre-1.0 Doorkeeper for SessionOutcome in
• Fix formatting in create_standup_discussion.py

Issues opened:

• Payjoin-cli panics as it fails to serialize some state

[benalleng]

Shipped

• Got cake sender up and running

Focus

• With the cake testnet finally figure out I got @xstoicunicornx 90% spun up on the environment to help test with more coins available to play with and "some" more consistency in the test flow. Hoping to get her on a running app today.

Bottleneck

• Review cycles on the cake PR. I am hoping that after su and I get it refined a bit the Konstantin or others will be willing to take the baton.

[ValeraFinebits]

Shipped

PRs opened:

• Update btcpayserver submodule ValeraFinebits/btcpayserver-payjoin-plugin#96
• fix: Fix slow async payjoin receiver pickup caused by relay-poll timeout ValeraFinebits/btcpayserver-payjoin-plugin#99
• chore: bump version to 0.3.0 ValeraFinebits/btcpayserver-payjoin-plugin#100
• feat: Label async payjoin settlement transactions ValeraFinebits/btcpayserver-payjoin-plugin#104
• fix: Make the Async Payjoin overview about the effective fallback ValeraFinebits/btcpayserver-payjoin-plugin#105

PRs reviewed:

• Bump Microsoft.EntityFrameworkCore.Design from 10.0.9 to 10.0.10 ValeraFinebits/btcpayserver-payjoin-plugin#92
• Bump Microsoft.EntityFrameworkCore.InMemory from 10.0.9 to 10.0.10 ValeraFinebits/btcpayserver-payjoin-plugin#93
• Bump Microsoft.EntityFrameworkCore.Sqlite from 10.0.9 to 10.0.10 ValeraFinebits/btcpayserver-payjoin-plugin#94
• Bump Microsoft.NET.Test.Sdk from 18.7.0 to 18.8.1 ValeraFinebits/btcpayserver-payjoin-plugin#95

PRs merged:

• Bump Microsoft.EntityFrameworkCore.Design from 10.0.9 to 10.0.10 ValeraFinebits/btcpayserver-payjoin-plugin#92
• Bump Microsoft.EntityFrameworkCore.InMemory from 10.0.9 to 10.0.10 ValeraFinebits/btcpayserver-payjoin-plugin#93
• Bump Microsoft.EntityFrameworkCore.Sqlite from 10.0.9 to 10.0.10 ValeraFinebits/btcpayserver-payjoin-plugin#94
• Bump Microsoft.NET.Test.Sdk from 18.7.0 to 18.8.1 ValeraFinebits/btcpayserver-payjoin-plugin#95

Issues opened:

• Re-enable skipped restart integration test ValeraFinebits/btcpayserver-payjoin-plugin#97

Focus

• Continue working on the plugin.

[caarloshenriq]

/check-in

[payjoin-bot]

Shipped

PRs reviewed:

• Pre-1.0 Doorkeeper for SessionOutcome in
• Add and Revise Receiver Interface Comments

[caarloshenriq]

Shipped

Ran the full v1 payjoin flow (sender and receiver roles) and the v2 ShortId/mailbox probe on real embedded hardware (STM32F411 Black Pill), end to end -- confirmed via USB packet capture, not just status signals. Found and fixed two real bugs in the harness's payjoin logic along the way encoding, command translation between roles).

Focus

• Write CI for payjoin-blackpill-test
• Review PRs

Bottleneck

None

[spacebear21]

/check-in

[payjoin-bot]

Shipped

PRs merged:

• Insulate bitcoin uri
• Restore ScriptBuf and Witness test imports
• Fix formatting in create_standup_discussion.py

PRs reviewed:

• Bump payjoin-cli version to 1.0.0-rc.1
• Bump payjoin to version 1.0.0-rc.6
• Prepare release-ready C# NuGet package workflow
• Expose proposal txid stability on receiver states
• Pre-1.0 Doorkeeper for SessionOutcome in

Issues opened:

• Release payjoin-cli-1.0.0-rc.1

[spacebear21]

Focus:

• Automate Package Publishing for All Release Artifacts #1766
• 1.0 release ™️

[chavic]

/check-in

[payjoin-bot]

Shipped

PRs merged:

• Expose proposal txid stability on receiver states
• Prepare release-ready C# NuGet package workflow

Auto-detected signals:

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

[chavic]

Shipped

Merged BTCPay Payjoin plugin (own):

• Give armed settlement records a grace period and an operator retry. [#74](Give armed settlement records a grace period and an operator retry ValeraFinebits/btcpayserver-payjoin-plugin#74)
• Pin settlement expectations atomically and verify them before crediting. With this the whole settlement cluster is in. [#75](Pin settlement expectations atomically and verify them before crediting ValeraFinebits/btcpayserver-payjoin-plugin#75)

Merged rust-payjoin:

• Expose proposal txid stability on receiver states, the machine-readable signal behind the plugin's segwit policy in [#78](Enforce the segwit assumptions on both sides of a payjoin ValeraFinebits/btcpayserver-payjoin-plugin#78). [#1718](Expose proposal txid stability on receiver states #1718)
• Prepare a release-ready C# NuGet package workflow. Last week's blocker, cleared; feeds the cake_wallet payjoin_ffi migration. [#1707](Prepare release-ready C# NuGet package workflow #1707)

Opened rust-payjoin:

• Make the C# package README user-facing. [#1764](Make the C# package README user-facing #1764)

Reviews (BTCPay Payjoin plugin):

• Update btcpayserver submodule, which also cleared the AngleSharp advisory breaking CI (merged). [#96](Update btcpayserver submodule ValeraFinebits/btcpayserver-payjoin-plugin#96)
• Fix slow async payjoin receiver pickup caused by relay-poll timeout (merged). [#99](fix: Fix slow async payjoin receiver pickup caused by relay-poll timeout ValeraFinebits/btcpayserver-payjoin-plugin#99)
• Bump version to 0.3.0 (open). [#100](chore: bump version to 0.3.0 ValeraFinebits/btcpayserver-payjoin-plugin#100)
• Label async payjoin settlement transactions (open). [#104](feat: Label async payjoin settlement transactions ValeraFinebits/btcpayserver-payjoin-plugin#104)
• Make the Async Payjoin overview about the effective fallback (open). [#105](fix: Make the Async Payjoin overview about the effective fallback ValeraFinebits/btcpayserver-payjoin-plugin#105)

Focus

• Wire the merged txid stability accessor ([#1718](Expose proposal txid stability on receiver states #1718)) into the segwit policy PR [#78](Enforce the segwit assumptions on both sides of a payjoin ValeraFinebits/btcpayserver-payjoin-plugin#78), dropping the host-side workaround.
• Publish the first C# NuGet package now that the workflow is in; [#1764](Make the C# package README user-facing #1764) polishes the package README.
• Wallet-side payjoin

Blockers

• The remaining plugin PRs await review and merge: accounting reset, OHTTP key refresh, segwit enforcement, fallback broadcast, and fee estimation.

[xstoicunicornx]

/check-in

[payjoin-bot]

Shipped

PRs reviewed:

• Make the C# package README user-facing
• Unify mailbox ShortId derivation
• Expose proposal txid stability on receiver states
• Decouple directory poll timing

[xstoicunicornx]

Shipped

• Directory request fingerprinting analysis
• Cake wallet testing

Focus

• Continue cake wallet testing
• Issue review

Bottleneck

None

[zealsham]

/check-in

[payjoin-bot]

Shipped

No activity found.

[zealsham]

Shipped

• was AFK all through last week .

Focus

• Follow up on Preserve mailroom metrics privacy #1754
• Review Keep receiver input failures recoverable #1769

starting of with those tasks to get my engine running again, will definitely do more than that this week .