Dan Gould: Payjoin DevKit Ships and Breaks Common Input Ownership | SLP753

Payjoin delivers transaction batching driven by real economic activity rather than waiting for pool participants, while also cutting fees through direct net settlement between counterparties.

Dan Gould, maintainer of Payjoin DevKit, explains how the new async protocol and oblivious HTTP relay change what is practical for mobile wallets today.

The conversation covers current live deployments in Bull Bitcoin and Cake Wallet, remaining fingerprinting heuristics beyond common input ownership, the multi-party roadmap, and how developers can integrate the library with under ten thousand lines of code.

Timestamps:

00:00 — Payjoin DevKit

01:46 — Live Payjoins in Wallets Today

04:25 — No Waiting for Batch Pools

06:14 — Payjoin Works on Mobile Phones

08:29 — Oblivious HTTP Hides Your IP

10:05 — Fingerprinting Still an Issue?

14:02 — Net Settlement Saves Big Fees

15:36 — Multi-Party Payjoin Roadmap

17:10 — Build Payjoin in a Weekend

Links: 

• https://x.com/brian_trollz/status/2069465912143749462 

• https://github.com/payjoin/payjoin.org/pull/143 

• https://payjoindevkit.org/ 

• https://x.com/bitgould

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