BIP Draft: Formosa — Themed mnemonic sentences for generating deterministic keys #2108

Yuri-SVB commented at 8:16 PM on February 28, 2026: none

Mnemonic sentences instead of words proposed as forwards- and backwards-compatible expansion to BIP39, itself as Bitcoin Improvement Proposal.

Formosa as BIP

Mnemonic *sentences* instead of words proposed as forwards- and backwards-compatible expansion to BIP39, itself as Bitcoin Improvement Proposal.

ea51d9b4b1

in bip.mediawiki:4 in ea51d9b4b1 outdated

   0 | @@ -0,0 +1,224 @@
   1 | +<pre>
   2 | +  BIP: ?
   3 | +  Layer: Applications
   4 | +  Title: Formosa --- Themed mnemonic sentences for generating deterministic keys

murchandamus commented at 7:24 PM on March 2, 2026:

Title is limited to 50 characters

Yuri-SVB commented at 9:44 PM on March 23, 2026:

New title: Encoding seed as themed mnemonic sentences

in bip.mediawiki:14 in ea51d9b4b1

   9 | +  Status: Draft
  10 | +  Type: Standards Track
  11 | +  Created: 2021-12-10
  12 | +  License: BSD-2-Clause
  13 | +  Requires: BIP-0032, BIP-0039
  14 | +  Post-History: https://www.toptal.com/cryptocurrency/formosa-crypto-wallet-management

murchandamus commented at 7:27 PM on March 2, 2026:

As we are now following BIP3 for the BIP Process, the Preamble is formatted slightly differently:

  Authors: Yuri S Villas Boas <yuri@t3infosecurity.com>
           André Fidencio Gonçalves <andre7c4@gmail.com>
  Status: Draft
  Type: Specification
  Assigned: ?
  License: BSD-2-Clause
  Requires: 32, 39
  Discussion: https://gnusha.org/pi/bitcoindev/jQqInjh7VTC5byefTzENidJjigvRqf5Y7UvbrWjKPJykvhdlLETeglGE3zoAiVAxUyAXU8uWHsHEjJ0MHqqPTy4prgaIhgMyIrD9c6ZUuE0=@pm.me/#t
              https://gnusha.org/pi/bitcoindev/F4cs-RJRQYBXhjoS9fc_cUc93yLrkQS5DNQAeFRHrLEQ5bScCjKSnaqN-IcXb16fxqO053muqFCx8_GzzKN5XCGCIHD9Ir1_baI5voKYfOo=@pm.me/
              https://www.toptal.com/cryptocurrency/formosa-crypto-wallet-management

murchandamus commented at 7:31 PM on March 2, 2026: member

Hi Yuri, thank you for your submission. I see that your proposal was posted to the mailing list in 2023. Since then, we deployed BIP3 as a new BIP Process, so there are a few formatting changes that would be needed to the preamble. I would also suggest that you add a link to the prior discussion to the Discussion header.

At first glance, your document appears to be missing a Specification, a Rationale, and a Backwards Compability section. Please refer to BIP3 for more information.

murchandamus added the label New BIP on Mar 4, 2026

murchandamus added the label PR Author action required on Mar 4, 2026

murchandamus renamed this:
~~Formosa as BIP~~
BIP Draft: Formosa — Themed mnemonic sentences for generating deterministic keys
on Mar 16, 2026

murchandamus commented at 6:11 PM on March 16, 2026: member

Hi @Yuri-SVB, I haven’t given this document a full review yet, because the initial submission has some formatting issues. If you are still working on this, please update your submission to meet the formatting requirements.

Yuri-SVB commented at 4:35 PM on March 23, 2026: none

Hello, Murchandamus. Thank you for your attention, and thank you for remembering my earlier attempt from 3 years ago! I believe the requirements are met now.

Update bip.mediawiki

Co-authored-by: Mark "Murch" Erhardt <murch@murch.one>

3166be9419

Update bip.mediawiki

Satisfying requirement of title in fewer than 50 characters.

738dac9c16

Yuri-SVB commented at 5:50 PM on March 28, 2026: none

Hi @Yuri-SVB, I haven’t given this document a full review yet, because the initial submission has some formatting issues. If you are still working on this, please update your submission to meet the formatting requirements.

Hello, Murch! Could you confirm all the remaining formatting requirements were met? Thank you!

murchandamus commented at 5:05 AM on March 29, 2026: member

Hey Yuri, sorry for not getting around to looking at this yet. The preamble looks much better. I’m afraid I’m gonna be afk next week, so I will not be able to give this a full read until I’m back the week after.

murchandamus removed the label PR Author action required on Mar 29, 2026

Yuri-SVB commented at 4:54 PM on April 1, 2026: none

Hey Yuri, sorry for not getting around to looking at this yet. The preamble looks much better. I’m afraid I’m gonna be afk next week, so I will not be able to give this a full read until I’m back the week after.

Hello, Murch. No problem. I hope this compilation of references on Formosa (how I call this BIP39 expansion) can be of help.