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[69.59.18.99]) by gmr-mx.google.com with ESMTPS id 71dfb90a1353d-513f30465ccsi798551e0c.0.2024.11.12.08.07.06 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Nov 2024 08:07:06 -0800 (PST) Received-SPF: pass (google.com: domain of lf-lists@mattcorallo.com designates 69.59.18.99 as permitted sender) client-ip=69.59.18.99; X-DKIM-Note: Keys used to sign are likely public at X-DKIM-Note: https://as397444.net/dkim/mattcorallo.com and X-DKIM-Note: https://as397444.net/dkim/clients.mail.as397444.net X-DKIM-Note: For more info, see https://as397444.net/dkim/ Received: by mail.as397444.net with esmtpsa (TLS1.3) (Exim) (envelope-from ) id 1tAtQ1-00192i-1O for bitcoindev@googlegroups.com; Tue, 12 Nov 2024 16:07:05 +0000 Message-ID: Date: Tue, 12 Nov 2024 11:07:04 -0500 MIME-Version: 1.0 Subject: Re: [bitcoindev] BIP 21 Updates From: Matt Corallo To: Bitcoin Development Mailing List References: <93c14d4f-10f3-48af-9756-7e39d61ba3d4@mattcorallo.com> Content-Language: en-US In-Reply-To: <93c14d4f-10f3-48af-9756-7e39d61ba3d4@mattcorallo.com> Content-Type: text/plain; charset="UTF-8"; format=flowed X-Original-Sender: lf-lists@mattcorallo.com X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@mattcorallo.com header.s=1731426063 header.b=D45N5wnF; dkim=pass header.i=@clients.mail.as397444.net header.s=1731426065 header.b=dyZXsb1l; spf=pass (google.com: domain of lf-lists@mattcorallo.com designates 69.59.18.99 as permitted sender) smtp.mailfrom=lf-lists@mattcorallo.com; dmarc=pass (p=NONE sp=REJECT dis=NONE) header.from=mattcorallo.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: -0.8 (/) Quick update on this. There was various pushback on the idea of updating a "Final" BIP, so instead this is gonna be a new BIP. Since its a new BIP we have the opportunity to add a bit more, so I went ahead and added a "payment info callback" parameter. Like the original proposed change this doesn't impact any existing wallets, but it does provide a new (important) feature for some use-cases, especially things like nostr zaps. The same PR is still where the new BIP lives, and there's examples and rationale, but to higlight the new (normative) section, it is included below: === Proof of Payment === The URI MAY include a "pop" (or "req-pop") parameter whose value can be used to build a URI which the wallet application can, after payment completes, "open" to provide proof the payment was completed or other information about the payment. The value of a "pop" (or "req-pop") parameter shall be a percent-encoded (per RFC 3986 section 2.1) URI prefix. The wallet application, if it supports providing payment information SHOULD percent-decode the provided URI once, append the query parameter key from which the payment instructions used were read, append a single =, and finally append the Payment Information to the resulting URI and open it with the default system handler for the URI. For payment instructions read from the body of the URI, "onchain" SHALL be used in place of the key. A wallet MUST validate that the provided URI's scheme is not (case-insensitive) "http", "https", "file", "javascript", "mailto" or any other scheme which will open in a web browser prior to opening it. If a wallet will not open the pop scheme (either because it does not support returning payment information for the selected payment method or because it uses a URI scheme which should not be opened) and the parameter was passed as a "req-pop" parameter, the wallet MUST NOT initiate payment. For payments made using an on-chain transaction, the Payment Information shall be the full (including witness data) Bitcoin transaction as it was broadcasted to the Bitcoin network, encoded in hex. For payments made using a BOLT 11 invoice (communicated via the `lightning` parameter), the Payment Information shall be the hex-encoded payment preimage. Other payment schemes will define their own Payment Information format. This BIP may be updated from time to time with Payment Information formats for other payment schemes. On 5/30/24 5:54 PM, Matt Corallo wrote: > It was recently pointed out at [1] that BIP 21 mandates only base58 adresses, and doesn't allow for > segwit or taproot addresses in the body of the URI. This is obviously somewhat nonsensical as nearly > every wallet supporting BIP 21 today handles Segwit (and many even Taproot) just fine in that > position today. > > Further, nearly every BIP 21-handling lightning wallet today also supports decoding lightning > payment instructions in the query parameters. With Silent Payments and BOLT 12 starting to get > adoption and BIP 21 being the obvious place to put extra payment instructions with an (optional) on- > chain fallback, there needs to be a standard way to decide which query parameter describes which > payment instruction, and BIP 21 should document this in-practice usage. > > Further, as future payment schemes (and existing ones like Silent Payments) may wish to not have the > standard on-chain fallback, I'm also proposing the body of the URI be made optional. > > None of these changes impact any existing wallets, as wallets already support bech32 and bech32m > addresses, new query parameters are ignored by any existing spec-compliant wallet, and a BIP 21 URI > with no body would only exist to provide a URI *without* a fallback for existing wallets, which > would correctly reject them as invalid. > > Thus, I'm proposing a change to (the already "Final") BIP 21. The relatively minimal change set is > available at https://github.com/bitcoin/bips/pull/1555 but I'm open to discussion on it here as well. > > [1] https://github.com/bitcoin/bips/pull/1394 > -- 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/a59ef220-b886-47e8-a279-5d3563f17423%40mattcorallo.com.