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67 lines
2.2 KiB
67 lines
2.2 KiB
<pre>
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BIP: 72
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Title: bitcoin: uri extensions for Payment Protocol
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Author: Gavin Andresen <gavinandresen@gmail.com>
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Status: Draft
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Type: Standards Track
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Created: 2013-07-29
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</pre>
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==Abstract==
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This BIP describes an extension to the bitcoin: URI scheme (BIP 21) to
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support the payment protocol (BIP 70).
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==Motivation==
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Allow users to click on a link in a web page or email to initiate the
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payment protocol, while being backwards-compatible with existing
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bitcoin wallets.
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==Specification==
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The bitcoin: URI scheme is extended with an additional, optional
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"r" parameter, whose value is a URL from which a PaymentRequest
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message should be fetched (characters not allowed within the scope
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of a query parameter must be percent-encoded as described in RFC 3986
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and bip-0021).
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If the "r" parameter is provided and backwards compatibility
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is not required, then the bitcoin address portion of the URI may be
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omitted (the URI will be of the form: bitcoin:?r=... ).
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When Bitcoin wallet software that supports this BIP receives a
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bitcoin: URI with a request parameter, it should ignore the bitcoin
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address/amount/label/message in the URI and instead fetch a
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PaymentRequest message and then follow the payment protocol, as
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described in BIP 70.
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Bitcoin wallets must support fetching PaymentRequests via http and
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https protocols; they may support other protocols. Wallets must
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include an "Accept" HTTP header in HTTP(s) requests (as defined
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in RFC 2616):
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<pre>Accept: application/bitcoin-paymentrequest</pre>
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If a PaymentRequest cannot be obtained (perhaps the server is
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unavailable), then the customer should be informed that the merchant's
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payment processing system is unavailable.
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==Compatibility==
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Wallet software that does not support this BIP will simply ignore the
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r parameter and will initiate a payment to bitcoin address.
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==Examples==
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A backwards-compatible request:
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<pre>
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bitcoin:mq7se9wy2egettFxPbmn99cK8v5AFq55Lx?amount=0.11&r=https://merchant.com/pay.php?h%3D2a8628fc2fbe
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</pre>
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Non-backwards-compatible equivalent:
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<pre>
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bitcoin:?r=https://merchant.com/pay.php?h%3D2a8628fc2fbe
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</pre>
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==References==
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[[http://www.w3.org/Protocols/rfc2616/rfc2616.html|RFC 2616]] : Hypertext Transfer Protocol -- HTTP/1.1
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