Subject: Re: [bitcoindev] Who uses or wants to use PSBTv2 (BIP370)

From: Kalle Rosenbaum <[email-masked]>
Date: Fri, 17 Jan 2025 11:01:19 +0100

Sjors,

Ledger has a PSBTv2 implementation since a number of years back. It's used
for communication between their Ledger Live software and the hardware
wallet.
https://github.com/LedgerHQ/ledger-live/blob/03b94dae50b1177801c57d9cee14cb5b4752b075/libs/ledgerjs/packages/hw-app-btc/src/newops/psbtv2.ts

/Kalle

On Fri, 17 Jan 2025 at 10:17, Sjors Provoost <[email-masked]> wrote:

> Dear list,
>
> It's been a few years since BIP370 was proposed [0]. It's a backwards
> compatible change to the PSBT standard defined by BIP174 [1]. Its main
> benefit is the ability to add new inputs and outputs to a transaction.
>
> There's a Bitcoin Core pull request #21283 implements support [2], but has
> seen very little review so far. Being able to test it against other
> implementation would aid in review.
>
> So which projects are using PSBTv2 or would very much like to?
>
> So far I've learned that Core Lightning uses it. They convert it back to
> v0 when interacting with Bitcoin Core, which they find suboptimal [3].
>
> Feel free to answer here on Stack Exchange [4].
>
> Kind regards,
>
> Sjors Provoost
>
> [0] https://github.com/bitcoin/bips/blob/master/bip-0370.mediawiki
> [1] https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki
> [2] https://github.com/bitcoin/bitcoin/pull/21283
> [3] https://github.com/bitcoin/bitcoin/pull/21283#issuecomment-2597171643
> [4]
> https://bitcoin.stackexchange.com/questions/125384/who-uses-or-wants-to-use-psbtv2-bip370
>
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