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[2607:f8b0:4864:20::92c]) by gmr-mx.google.com with ESMTPS id 98e67ed59e1d1-2faa5cee208si822460a91.1.2025.02.16.00.50.18 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 16 Feb 2025 00:50:18 -0800 (PST) Received-SPF: pass (google.com: domain of martin.habovstiak@gmail.com designates 2607:f8b0:4864:20::92c as permitted sender) client-ip=2607:f8b0:4864:20::92c; Received: by mail-ua1-x92c.google.com with SMTP id a1e0cc1a2514c-86714f41f5bso1069834241.3 for ; Sun, 16 Feb 2025 00:50:18 -0800 (PST) X-Gm-Gg: ASbGncsvvy2+ZoQTav+4twT3iHr9Nk+cNKXopnCrv4DIBuM5O0utXt1lZA2wdf7ioPw zDVXl8MVHbimnuAYoe6UqxbALUFOoaYa+17Es0ET6QEK3ov3KdHvLj219EochavWd+9TGwq/C X-Received: by 2002:a05:6102:509f:b0:4bc:18aa:51b1 with SMTP id ada2fe7eead31-4bd3fd51f63mr2339112137.21.1739695817475; Sun, 16 Feb 2025 00:50:17 -0800 (PST) MIME-Version: 1.0 References: <94ac8f66-1627-4526-bb34-095361a30fb4n@googlegroups.com> In-Reply-To: <94ac8f66-1627-4526-bb34-095361a30fb4n@googlegroups.com> From: =?UTF-8?Q?Martin_Habov=C5=A1tiak?= Date: Sun, 16 Feb 2025 09:50:08 +0100 X-Gm-Features: AWEUYZk_iY5D7HyH1FeoUj2b0VtEKFdx-OrP_izchJgqiK-I7RDfKXTsIpoQbHI Message-ID: Subject: Re: [bitcoindev] Announcing Bitcoin BOSD: Standardized Withdrawal Output Specification for L2s To: Jose Storopoli Cc: Bitcoin Development Mailing List Content-Type: multipart/alternative; boundary="00000000000037cea3062e3e7fee" X-Original-Sender: martin.habovstiak@gmail.com X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=ievbfsG9; spf=pass (google.com: domain of martin.habovstiak@gmail.com designates 2607:f8b0:4864:20::92c as permitted sender) smtp.mailfrom=martin.habovstiak@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com; dara=pass header.i=@googlegroups.com Precedence: list Mailing-list: list bitcoindev@googlegroups.com; contact bitcoindev+owners@googlegroups.com List-ID: X-Google-Group-Id: 786775582512 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Score: -0.5 (/) --00000000000037cea3062e3e7fee Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi, good idea and a nice crate! You'll hear from me soon regarding the Rust side on your issue tracker. Maybe you should reconsider the name. It's too similar to BSOD and myabe you haerd taht if fisrt and lsat lteter in a wrod are the smae yuor brian can dcedoe tehm anwyay. :) Good luck! Martin D=C5=88a so 15. 2. 2025, 13:02 Jose Storopoli nap=C3=AD= sal(a): > > Dear Bitcoin Dev Community, > > I am excited to introduce Bitcoin BOSD (Bitcoin Output Script Descriptor)= , > a new specification and open source Rust implementation to simplify > relay-safe (standardness-guarantee) on-chain withdrawals for Bitcoin Laye= r > 2 solutions. > > Key Features: > - Standardness-by-construction for withdrawal outputs > - Eliminates ad-hoc standardness rule implementations in L2s > - Compact representation > > Problem Solved: > L2 operators currently risk being unable to process withdrawals if users > request non-standard transactions (e.g., oversized OP_RETURN). BOSD ensur= es > outputs are correct-by-construction according to Bitcoin network's > standardness rules, abstracting away complex validation logic. > > Available on crates.io > > Get Involved: > Detailed Specification and Motivation/Rationale: SPECIFICATION.md > > Repository: github.com/alpenlabs/bitcoin-bosd > Feedback welcome via GitHub Issues and Discussion; or the mailing list. > > This work emerged from practical challenges faced by myself and Trey Del > Bonis (GitHub @delbonis) at Alpen Labs, while building validation logic f= or > processing L2 withdrawals on-chain for Strata: a Bitcoin-native BitVM-bas= ed > bridge to a ZK-rollup. We believe standardization in this domain will > benefit the entire ecosystem by reducing fragmentation and improving > interoperability. > The specification is has a CC0 public domain license, and the Rust > implementation is MIT/Apache-2.0 double licensed. > > The structure of a BOSD consists of: > > - 1-byte tag representing a type ID. > - Arbitrary-length cryptographic payload (although practically bounded to > like > 80 bytes). > > Here's a table for the supported outputs. Also note that we can trivially > extend it by adding more prefixes using the type it byte. > > ``` > | Type | Payload Length(s) | Payload Interpretation | Spend Type | > Mainnet Address Prefix | > | ---- | ----------------- | ---------------------- | ------------- | > ---------------------- | > | 0 | ..=3D80 | `OP_RETURN` payload | (N/A) | > (N/A) | > | 1 | 20 | pubkey hash | P2PKH | > `1...` | > | 2 | 20 | script hash | P2SH | > `3...` | > | 3 | 20, 32 | SegWit v0 hash | P2WPKH, P2WSH | > `bc1q...` | > | 4 | 32 | SegWit v1 public key | P2TR | > `bc1p...` | > ``` > > Since we strived for compact representation both in-memory and also > over-the-wire, BOSD does not support checksums or any native error > correction. > > PS: Technically Strata is not a defect L2, since it is a 1-of-N > trust-minimized bridge, and not a fully trustless bridge. > > -- > You received this message because you are subscribed to the Google Groups > "Bitcoin Development Mailing List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to bitcoindev+unsubscribe@googlegroups.com. > To view this discussion visit > https://groups.google.com/d/msgid/bitcoindev/94ac8f66-1627-4526-bb34-0953= 61a30fb4n%40googlegroups.com > > . > --=20 You received this message because you are subscribed to the Google Groups "= Bitcoin Development Mailing List" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to bitcoindev+unsubscribe@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/bitcoindev/= CALkkCJZWoChE_njE876zB57ptc6BdTRUb%3DRqXU-uJ8bKEy_exg%40mail.gmail.com. --00000000000037cea3062e3e7fee Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi,

good ide= a and a nice crate! You'll hear from me soon regarding the Rust side on= your issue tracker.

May= be you should reconsider the name. It's too similar to BSOD and myabe y= ou haerd taht if fisrt and lsat lteter in a wrod are the smae yuor brian ca= n dcedoe tehm anwyay. :)

Good luck!

Martin
=

D=C5=88a so 15. 2. 2025, 13:02 Jose Storopoli <jose@storopoli.io> nap=C3=ADsal(a)= :

Dear Bitcoin Dev Community, <= br>
I am excited to introduce Bitcoin BOSD (Bitcoin Output Script Descri= ptor), a new specification and open source Rust implementation to simplify = relay-safe (standardness-guarantee) on-chain withdrawals for Bitcoin Layer = 2 solutions.

Key Features:
- Standardness-by-construction for wi= thdrawal outputs
- Eliminates ad-hoc standardness rule implementations = in L2s
- Compact representation

Problem Solved:
L2 operators = currently risk being unable to process withdrawals if users request non-sta= ndard transactions (e.g., oversized OP_RETURN). BOSD ensures outputs are co= rrect-by-construction according to Bitcoin network's standardness rules= , abstracting away complex validation logic.

Available on crates.io

Get Involved:

Here's a table for the supported outputs. Also note that = we can trivially extend it by adding more prefixes using the type it byte.<= /div>

```
| Type | Payload Length(s) | Payload= Interpretation | Spend Type =C2=A0 =C2=A0| Mainnet Address Prefix |
| -= --- | ----------------- | ---------------------- | ------------- | --------= -------------- |
| 0 =C2=A0 =C2=A0| ..=3D80 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 | `OP_RETURN` payload =C2=A0 =C2=A0| (N/A) =C2=A0 =C2=A0 =C2= =A0 =C2=A0 | (N/A) =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0|
| 1 =C2=A0 =C2=A0| 20 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0| pubkey hash =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| P2PKH= =C2=A0 =C2=A0 =C2=A0 =C2=A0 | `1...` =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 |
| 2 =C2=A0 =C2=A0| 20 =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0| script hash =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0| P2SH =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| `3...` =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 |
| 3 =C2=A0 =C2=A0| 20, 32 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| SegWit v0 hash =C2=A0 =C2=A0 =C2= =A0 =C2=A0 | P2WPKH, P2WSH | `bc1q...` =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0|
| 4 =C2=A0 =C2=A0| 32 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0| SegWit v1 public key =C2=A0 | P2TR =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0| `bc1p...` =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0|
```

Since we strived for compac= t representation both in-memory and also over-the-wire, BOSD does not suppo= rt checksums or any native error correction.

PS: T= echnically Strata is not a defect L2, since it is a 1-of-N trust-minimized = bridge, and not a fully trustless bridge.

--
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