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BIP77: Propose to encode + as %2B in pj param of Bitcoin URIs #1885

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BIP77: Propose to encode + as %2B in pj param of Bitcoin URIs #1885

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8 changes: 5 additions & 3 deletions bip-0077.md
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Expand Up @@ -233,8 +233,10 @@ fragment of the Bitcoin URI.
These session-specific parameters use a bech32-inspired encoding.
The HRP is used as the parameter key, followed by the '1' separator,
followed by the parameter value encoded using the bech32 character set in
[uppercase](#uppercase-url). No checksum is used. Parameters are separated
by a `+` character.
[uppercase](#uppercase-url). No checksum is used. Parameters are separated by a + character,
which must be [RFC 3986
percent-encoded](https://datatracker.ietf.org/doc/html/rfc3986#section-2.1) as `%2B` to avoid it being interpreted as a space in Bitcoin URI query parameters.
To preserve QR alphanumeric mode compatibility, `%2B` ([uppercase](#uppercase-url)) should be used instead of `%2b`.

The following parameters are defined, and must be provided in reverse
lexicographical order:
Expand All @@ -253,7 +255,7 @@ lexicographical order:
time](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_16).

For example, a properly encoded endpoint Bitcoin URI looks like this
`bitcoin:tb1q6q6de88mj8qkg0q5lupmpfexwnqjsr4d2gvx2p?amount=0.00666666&pjos=0&pj=HTTPS://PAYJO.IN/TXJCGKTKXLUUZ%23RK1Q0DJS3VVDXWQQTLQ8022QGXSX7ML9PHZ6EDSF6AKEWQG758JPS2EV+OH1QYPM59NK2LXXS4890SUAXXYT25Z2VAPHP0X7YEYCJXGWAG6UG9ZU6NQ+EX1WKV8CEC`
`bitcoin:tb1q6q6de88mj8qkg0q5lupmpfexwnqjsr4d2gvx2p?amount=0.00666666&pjos=0&pj=HTTPS://PAYJO.IN/TXJCGKTKXLUUZ%23RK1Q0DJS3VVDXWQQTLQ8022QGXSX7ML9PHZ6EDSF6AKEWQG758JPS2EV%2BOH1QYPM59NK2LXXS4890SUAXXYT25Z2VAPHP0X7YEYCJXGWAG6UG9ZU6NQ%2BEX1WKV8CEC`

### Sender Original PSBT Messaging

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