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ZIP 321: Add Deployment section. #1289

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2 changes: 0 additions & 2 deletions README.rst
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Expand Up @@ -198,7 +198,6 @@ written.
<tr> <td>312</td> <td class="left"><a href="zips/zip-0312.rst">FROST for Spend Authorization Multisignatures</a></td> <td>Draft</td> <td class="left"><a href="https://github.com/zcash/zips/issues/382">zips#382</a></td>
<tr> <td><span class="reserved">314</span></td> <td class="left"><a class="reserved" href="zips/zip-0314.rst">Privacy upgrades to the Zcash light client protocol</a></td> <td>Reserved</td> <td class="left"><a href="https://github.com/zcash/zips/issues/434">zips#434</a></td>
<tr> <td>315</td> <td class="left"><a href="zips/zip-0315.rst">Best Practices for Wallet Implementations</a></td> <td>Draft</td> <td class="left"><a href="https://github.com/zcash/zips/issues/447">zips#447</a></td>
<tr> <td><span class="reserved">318</span></td> <td class="left"><a class="reserved" href="zips/zip-0318.rst">Associated Payload Encryption</a></td> <td>Reserved</td> <td class="left"><a href="https://github.com/zcash/zips/issues/633">zips#633</a></td>
<tr> <td><span class="reserved">319</span></td> <td class="left"><a class="reserved" href="zips/zip-0319.rst">Options for Shielded Pool Retirement</a></td> <td>Reserved</td> <td class="left"><a href="https://github.com/zcash/zips/issues/635">zips#635</a></td>
<tr> <td><span class="reserved">322</span></td> <td class="left"><a class="reserved" href="zips/zip-0322.rst">Generic Signed Message Format</a></td> <td>Reserved</td> <td class="left"><a href="https://github.com/zcash/zips/issues/429">zips#429</a></td>
<tr> <td><span class="reserved">323</span></td> <td class="left"><a class="reserved" href="zips/zip-0323.rst">Specification of getblocktemplate for Zcash</a></td> <td>Reserved</td> <td class="left"><a href="https://github.com/zcash/zips/issues/405">zips#405</a></td>
Expand Down Expand Up @@ -355,7 +354,6 @@ Index of ZIPs
<tr> <td>315</td> <td class="left"><a href="zips/zip-0315.rst">Best Practices for Wallet Implementations</a></td> <td>Draft</td>
<tr> <td>316</td> <td class="left"><a href="zips/zip-0316.rst">Unified Addresses and Unified Viewing Keys</a></td> <td>[Revision 0] Active, [Revision 1] Withdrawn, [Revision 2] Draft</td>
<tr> <td>317</td> <td class="left"><a href="zips/zip-0317.rst">Proportional Transfer Fee Mechanism</a></td> <td>Active</td>
<tr> <td><span class="reserved">318</span></td> <td class="left"><a class="reserved" href="zips/zip-0318.rst">Associated Payload Encryption</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">319</span></td> <td class="left"><a class="reserved" href="zips/zip-0319.rst">Options for Shielded Pool Retirement</a></td> <td>Reserved</td>
<tr> <td>320</td> <td class="left"><a href="zips/zip-0320.rst">Defining an Address Type to which funds can only be sent from Transparent Addresses</a></td> <td>Active</td>
<tr> <td>321</td> <td class="left"><a href="zips/zip-0321.rst">Payment Request URIs</a></td> <td>Active</td>
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18 changes: 18 additions & 0 deletions zips/zip-0321.rst
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Expand Up @@ -449,6 +449,23 @@ query parameter rather than in the ``hier-part`` of the URI. They may also
not support the ``memo`` parameter, or may not treat it as base64url-encoded.


Deployment
==========

ZIP 321 payment request URIs are widely deployed in the Zcash ecosystem.
A reference implementation of parsing and construction of ZIP 321 URIs (for
the ZEC-only subset of the format, excluding the ``req-asset`` extension) is
provided by the ``zip321`` crate in the ``librustzcash`` repository
[#librustzcash-zip321]_, and is used by wallets built on the
``zcash_client_backend`` library. Support for ZIP 321 URIs has shipped in
production wallets including Zashi, Nighthawk Wallet, Edge, Unstoppable
Wallet, YWallet, and (historically) ZecWallet Lite, among others, and is
commonly relied upon for generating QR codes and clickable payment links.

The ``req-asset`` extension for Custom Asset payments described in this ZIP
is not yet deployed, pending the activation of ZIP 227 [#zip-0227]_.


References
==========

Expand All @@ -463,6 +480,7 @@ References
.. [#zip-0173] `ZIP 173: Bech32 Format <zip-0173.rst>`_
.. [#zip-0211] `ZIP 211: Disabling Addition of New Value to the Sprout Value Pool <zip-0211.rst>`_
.. [#zip-0227] `ZIP 227: Issuance of Zcash Shielded Assets <zip-0227.rst>`_
.. [#librustzcash-zip321] `librustzcash: zip321 crate <https://github.com/zcash/librustzcash/tree/main/components/zip321>`_
.. [#zip-0227-asset-identifier] `ZIP 227: Issuance of Zcash Shielded Assets — Asset Identifier <zip-0227.rst#asset-identifier>`_
.. [#zip-0316] `ZIP 316: Unified Addresses and Unified Viewing Keys <zip-0316.rst>`_
.. [#protocol-networks] `Zcash Protocol Specification, Version 2023.4.0. Section 3.11: Mainnet and Testnet <protocol/protocol.pdf#networks>`_
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