[Feature Request] Next-Level Bitcoin Privacy: PayJoin Support, Enhanced Address Labeling & Dust Protection

[nico268337]

Thanks for adding BTC Coin Control in v5.19.0 / v5.19.2 – an excellent step forward for on-chain privacy.

Combined with Multi-Address Mode (fresh change addresses), baseline privacy is now strong.
However, several advanced privacy tools that are standard in the Bitcoin ecosystem (e.g. Sparrow, Wasabi, Samourai, Cake Wallet v2) are still missing.

Prioritized Feature Requests

1. PayJoin (P2EP) Support

   • Collaborative transactions to break common-input ownership heuristics
   • Similar to the implementation in Cake Wallet
   • High privacy impact with minimal UX complexity

2. Enhanced Address / UTXO Labeling

   • Store and display custom labels for addresses and UTXOs
   • Comparable to Sparrow or Electrum
   • Crucial for manual coin control and long-term wallet hygiene

3. Dust Protection

   • Automatic detection and warnings for suspicious dust inputs
   • Option to block dust by default
   • Safe, privacy-aware consolidation workflows

Why This Matters

Chain analysis firms are increasingly aggressive in 2026.
Adding these features would position OneKey as a serious privacy-focused Bitcoin wallet and attract advanced users who currently rely on Sparrow + hardware wallets (Coldcard, Trezor, etc.).

Suggestion

PayJoin support likely offers the highest immediate privacy gain (PSBT-based, serverless implementations are possible).
Address labeling and dust protection appear to be relatively straightforward app-side improvements.

Happy to help with feedback or testing.
Great foundation already — pushing these features would take OneKey to the next level.

[DanGould]

We just added JavaScript to Payjoin Dev Kit. Happy to walk you through an integration

https://www.npmjs.com/package/payjoin