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[2620:6e:a000:1::99]) by gmr-mx.google.com with ESMTPS id d9443c01a7336-1f632338b6bsi244945ad.2.2024.05.30.14.54.44 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 May 2024 14:54:44 -0700 (PDT) Received-SPF: pass (google.com: domain of lf-lists@mattcorallo.com designates 2620:6e:a000:1::99 as permitted sender) client-ip=2620:6e:a000:1::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 1sCnjO-009AFC-35 for bitcoindev@googlegroups.com; Thu, 30 May 2024 21:54:43 +0000 Message-ID: <93c14d4f-10f3-48af-9756-7e39d61ba3d4@mattcorallo.com> Date: Thu, 30 May 2024 17:54:26 -0400 MIME-Version: 1.0 Content-Language: en-US To: Bitcoin Development Mailing List From: Matt Corallo Subject: [bitcoindev] BIP 21 Updates 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=1717104062 header.b=P1XN5QAP; dkim=pass header.i=@clients.mail.as397444.net header.s=1717104064 header.b=el8NKxuX; spf=pass (google.com: domain of lf-lists@mattcorallo.com designates 2620:6e:a000:1::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 (/) 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 on the web visit https://groups.google.com/d/msgid/bitcoindev/93c14d4f-10f3-48af-9756-7e39d61ba3d4%40mattcorallo.com.