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<title>README: Specifications and Zcash Improvement Proposals</title>
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<section>
<!-- Title: Specifications and Zcash Improvement Proposals -->
<section id="what-are-zips"><h2><span class="section-heading">What are ZIPs?</span><span class="section-anchor"> <a rel="bookmark" href="#what-are-zips"><img width="24" height="24" class="section-anchor" src="assets/images/section-anchor.png" alt=""></a></span></h2>
<p>Zcash Improvement Proposals (ZIPs) are the way to:</p>
<ul>
<li>propose new features for the <a href="https://z.cash/">Zcash cryptocurrency</a> and their rationale,</li>
<li>specify the implementation details of the feature,</li>
<li>collect community input on the proposal, and</li>
<li>document design decisions.</li>
</ul>
</section>
<section id="contributing"><h2><span class="section-heading">Contributing</span><span class="section-anchor"> <a rel="bookmark" href="#contributing"><img width="24" height="24" class="section-anchor" src="assets/images/section-anchor.png" alt=""></a></span></h2>
<p>The authors of a ZIP are responsible for building consensus within the community and documenting / addressing dissenting opinions.</p>
<p>Anyone can write a ZIP! We encourage community contributions and decentralization of work on the Zcash protocol. If you’d like to bounce ideas off people before formally writing a ZIP, we encourage it! Visit the <a href="https://forum.zcashcommunity.com/c/community-collaboration/7">Zcash Community Forum</a> to talk about your idea.</p>
<p>Participation in the Zcash project is subject to a <a href="https://github.com/zcash/zcash/blob/master/code_of_conduct.md">Code of Conduct</a>.</p>
<p>The Zcash protocol is documented in its <span class="lightmode"><a href="https://zips.z.cash/protocol/protocol.pdf">Protocol Specification</a></span><span class="darkmode" style="display: none;"><a href="https://zips.z.cash/protocol/protocol-dark.pdf">Protocol Specification</a></span>.</p>
<p>To start contributing, first read <a href="zip-0000">ZIP 0</a> which documents the ZIP process. Then clone <a href="https://github.com/zcash/zips">this repo</a> from GitHub, and start adding your draft ZIP, formatted either as reStructuredText or as Markdown, into the <cite>zips/</cite> directory.</p>
<p>For example, if using reStructuredText, use a filename matching <code>zips/draft-*.rst</code>. Use <code>make</code> to check that you are using correct <a href="https://docutils.sourceforge.io/rst.html">reStructuredText</a> or <a href="https://pandoc.org/MANUAL.html#pandocs-markdown">Markdown</a> syntax, and double-check the generated <code>rendered/draft-*.html</code> file before filing a Pull Request. See <a href="protocol/README">here</a> for the project dependencies.</p>
</section>
<section id="nu6-1-candidate-zips"><h2><span class="section-heading">NU6.1 Candidate ZIPs</span><span class="section-anchor"> <a rel="bookmark" href="#nu6-1-candidate-zips"><img width="24" height="24" class="section-anchor" src="assets/images/section-anchor.png" alt=""></a></span></h2>
<p>The following ZIP drafts are under consideration for inclusion in NU6.1:</p>
<ul>
<li><a href="draft-ecc-community-and-coinholder">draft-ecc-community-and-coinholder: Community and Coinholder Funding Model</a></li>
<li><a href="draft-ecc-lockbox-disbursement">draft-ecc-lockbox-disbursement: Deferred Dev Fund Lockbox Disbursement</a></li>
</ul>
<p>This list is only provided here for easy reference; no decision has been made on whether to include each of these ZIP drafts.</p>
<p><a href="zip-0255">ZIP 255: Deployment of the NU6.1 Network Upgrade</a> will define which ZIPs are included in NU6.1.</p>
</section>
<section id="nu7-candidate-zips"><h2><span class="section-heading">NU7 Candidate ZIPs</span><span class="section-anchor"> <a rel="bookmark" href="#nu7-candidate-zips"><img width="24" height="24" class="section-anchor" src="assets/images/section-anchor.png" alt=""></a></span></h2>
<p>The following ZIPs are under consideration for inclusion in NU7:</p>
<ul>
<li><a href="zip-0226">ZIP 226: Transfer and Burn of Zcash Shielded Assets</a></li>
<li><a href="zip-0227">ZIP 227: Issuance of Zcash Shielded Assets</a></li>
<li><a href="zip-0230">ZIP 230: Version 6 Transaction Format</a></li>
<li><a href="zip-0231">ZIP 231: Memo Bundles</a></li>
<li><a href="zip-0233">ZIP 233: Network Sustainability Mechanism: Burning</a></li>
<li><a href="zip-0234">ZIP 234: Network Sustainability Mechanism: Issuance Smoothing</a></li>
<li><a href="zip-0235">ZIP 235: Network Sustainability Mechanism: Burn 60% of Transaction Fees</a></li>
<li><a href="zip-0246">ZIP 246: Digests for the Version 6 Transaction Format</a></li>
<li><a href="zip-2002">ZIP 2002: Explicit Fees</a></li>
<li><a href="zip-2003">ZIP 2003: Disallow version 4 transactions</a></li>
<li><a href="zip-2004">ZIP 2004: Remove the dependency of consensus on note encryption</a></li>
</ul>
<p>In addition, <a href="zip-0317">ZIP 317: Proportional Transfer Fee Mechanism</a> may be updated.</p>
<p>This list is only provided here for easy reference; no decision has been made on whether to include each of these ZIPs.</p>
<p><a href="draft-arya-deploy-nu7">draft-arya-deploy-nu7: Deployment of the NU7 Network Upgrade</a> will define which ZIPs are included in NU7.</p>
</section>
<section id="license"><h2><span class="section-heading">License</span><span class="section-anchor"> <a rel="bookmark" href="#license"><img width="24" height="24" class="section-anchor" src="assets/images/section-anchor.png" alt=""></a></span></h2>
<p>Unless otherwise stated in this repository’s individual files, the contents of this repository are released under the terms of the MIT license. See <a href="COPYING">COPYING</a> for more information or see <a href="https://opensource.org/licenses/MIT">https://opensource.org/licenses/MIT</a> .</p>
</section>
<section id="released-zips"><h2><span class="section-heading">Released ZIPs</span><span class="section-anchor"> <a rel="bookmark" href="#released-zips"><img width="24" height="24" class="section-anchor" src="assets/images/section-anchor.png" alt=""></a></span></h2>
<embed><table>
<tr> <th>ZIP</th> <th>Title</th> <th>Status</th> </tr>
<tr> <td>0</td> <td class="left"><a href="zip-0000">ZIP Process</a></td> <td>Active</td>
<tr> <td>32</td> <td class="left"><a href="zip-0032">Shielded Hierarchical Deterministic Wallets</a></td> <td>Final</td>
<tr> <td>143</td> <td class="left"><a href="zip-0143">Transaction Signature Validation for Overwinter</a></td> <td>Final</td>
<tr> <td>155</td> <td class="left"><a href="zip-0155">addrv2 message</a></td> <td>Proposed</td>
<tr> <td>173</td> <td class="left"><a href="zip-0173">Bech32 Format</a></td> <td>Final</td>
<tr> <td>200</td> <td class="left"><a href="zip-0200">Network Upgrade Mechanism</a></td> <td>Final</td>
<tr> <td>201</td> <td class="left"><a href="zip-0201">Network Peer Management for Overwinter</a></td> <td>Final</td>
<tr> <td>202</td> <td class="left"><a href="zip-0202">Version 3 Transaction Format for Overwinter</a></td> <td>Final</td>
<tr> <td>203</td> <td class="left"><a href="zip-0203">Transaction Expiry</a></td> <td>Final</td>
<tr> <td>205</td> <td class="left"><a href="zip-0205">Deployment of the Sapling Network Upgrade</a></td> <td>Final</td>
<tr> <td>206</td> <td class="left"><a href="zip-0206">Deployment of the Blossom Network Upgrade</a></td> <td>Final</td>
<tr> <td>207</td> <td class="left"><a href="zip-0207">Funding Streams</a></td> <td>[Canopy, NU6] Final</td>
<tr> <td>208</td> <td class="left"><a href="zip-0208">Shorter Block Target Spacing</a></td> <td>Final</td>
<tr> <td>209</td> <td class="left"><a href="zip-0209">Prohibit Negative Shielded Chain Value Pool Balances</a></td> <td>Final</td>
<tr> <td>211</td> <td class="left"><a href="zip-0211">Disabling Addition of New Value to the Sprout Chain Value Pool</a></td> <td>Final</td>
<tr> <td>212</td> <td class="left"><a href="zip-0212">Allow Recipient to Derive Ephemeral Secret from Note Plaintext</a></td> <td>Final</td>
<tr> <td>213</td> <td class="left"><a href="zip-0213">Shielded Coinbase</a></td> <td>Final</td>
<tr> <td>214</td> <td class="left"><a href="zip-0214">Consensus rules for a Zcash Development Fund</a></td> <td>[Revision 0: Canopy, Revision 1: NU6] Final</td>
<tr> <td>215</td> <td class="left"><a href="zip-0215">Explicitly Defining and Modifying Ed25519 Validation Rules</a></td> <td>Final</td>
<tr> <td>216</td> <td class="left"><a href="zip-0216">Require Canonical Jubjub Point Encodings</a></td> <td>Final</td>
<tr> <td>221</td> <td class="left"><a href="zip-0221">FlyClient - Consensus-Layer Changes</a></td> <td>Final</td>
<tr> <td>224</td> <td class="left"><a href="zip-0224">Orchard Shielded Protocol</a></td> <td>Final</td>
<tr> <td>225</td> <td class="left"><a href="zip-0225">Version 5 Transaction Format</a></td> <td>Final</td>
<tr> <td>236</td> <td class="left"><a href="zip-0236">Blocks should balance exactly</a></td> <td>Final</td>
<tr> <td>239</td> <td class="left"><a href="zip-0239">Relay of Version 5 Transactions</a></td> <td>Final</td>
<tr> <td>243</td> <td class="left"><a href="zip-0243">Transaction Signature Validation for Sapling</a></td> <td>Final</td>
<tr> <td>244</td> <td class="left"><a href="zip-0244">Transaction Identifier Non-Malleability</a></td> <td>Final</td>
<tr> <td>250</td> <td class="left"><a href="zip-0250">Deployment of the Heartwood Network Upgrade</a></td> <td>Final</td>
<tr> <td>251</td> <td class="left"><a href="zip-0251">Deployment of the Canopy Network Upgrade</a></td> <td>Final</td>
<tr> <td>252</td> <td class="left"><a href="zip-0252">Deployment of the NU5 Network Upgrade</a></td> <td>Final</td>
<tr> <td>253</td> <td class="left"><a href="zip-0253">Deployment of the NU6 Network Upgrade</a></td> <td>Final</td>
<tr> <td>300</td> <td class="left"><a href="zip-0300">Cross-chain Atomic Transactions</a></td> <td>Proposed</td>
<tr> <td>301</td> <td class="left"><a href="zip-0301">Zcash Stratum Protocol</a></td> <td>Active</td>
<tr> <td>308</td> <td class="left"><a href="zip-0308">Sprout to Sapling Migration</a></td> <td>Active</td>
<tr> <td>316</td> <td class="left"><a href="zip-0316">Unified Addresses and Unified Viewing Keys</a></td> <td>[Revision 0] Active, [Revision 1] Proposed</td>
<tr> <td>317</td> <td class="left"><a href="zip-0317">Proportional Transfer Fee Mechanism</a></td> <td>Active</td>
<tr> <td>320</td> <td class="left"><a href="zip-0320">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="zip-0321">Payment Request URIs</a></td> <td>Active</td>
<tr> <td>401</td> <td class="left"><a href="zip-0401">Addressing Mempool Denial-of-Service</a></td> <td>Active</td>
<tr> <td>1014</td> <td class="left"><a href="zip-1014">Establishing a Dev Fund for ECC, ZF, and Major Grants</a></td> <td>Active</td>
<tr> <td>1015</td> <td class="left"><a href="zip-1015">Block Subsidy Allocation for Non-Direct Development Funding</a></td> <td>Final</td>
<tr> <td>2001</td> <td class="left"><a href="zip-2001">Lockbox Funding Streams</a></td> <td>Final</td>
</table></embed></section>
<section id="draft-zips"><h2><span class="section-heading">Draft ZIPs</span><span class="section-anchor"> <a rel="bookmark" href="#draft-zips"><img width="24" height="24" class="section-anchor" src="assets/images/section-anchor.png" alt=""></a></span></h2>
<p>These are works-in-progress that have been assigned ZIP numbers. These will eventually become either Proposed (and thus Released), or one of Withdrawn, Rejected, or Obsolete.</p>
<p>In some cases a ZIP number is reserved by the ZIP Editors before a draft is written.</p>
<embed><table>
<tr> <th>ZIP</th> <th>Title</th> <th>Status</th> </tr>
<tr> <td><span class="reserved">1</span></td> <td class="left"><a class="reserved" href="zip-0001">Network Upgrade Policy and Scheduling</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">2</span></td> <td class="left"><a class="reserved" href="zip-0002">Design Considerations for Network Upgrades</a></td> <td>Reserved</td>
<tr> <td>68</td> <td class="left"><a href="zip-0068">Relative lock-time using consensus-enforced sequence numbers</a></td> <td>Draft</td>
<tr> <td><span class="reserved">76</span></td> <td class="left"><a class="reserved" href="zip-0076">Transaction Signature Validation before Overwinter</a></td> <td>Reserved</td>
<tr> <td>112</td> <td class="left"><a href="zip-0112">CHECKSEQUENCEVERIFY</a></td> <td>Draft</td>
<tr> <td>113</td> <td class="left"><a href="zip-0113">Median Time Past as endpoint for lock-time calculations</a></td> <td>Draft</td>
<tr> <td><span class="reserved">204</span></td> <td class="left"><a class="reserved" href="zip-0204">Zcash P2P Network Protocol</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">217</span></td> <td class="left"><a class="reserved" href="zip-0217">Aggregate Signatures</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">219</span></td> <td class="left"><a class="reserved" href="zip-0219">Disabling Addition of New Value to the Sapling Chain Value Pool</a></td> <td>Reserved</td>
<tr> <td>222</td> <td class="left"><a href="zip-0222">Transparent Zcash Extensions</a></td> <td>Draft</td>
<tr> <td>226</td> <td class="left"><a href="zip-0226">Transfer and Burn of Zcash Shielded Assets</a></td> <td>Draft</td>
<tr> <td>227</td> <td class="left"><a href="zip-0227">Issuance of Zcash Shielded Assets</a></td> <td>Draft</td>
<tr> <td><span class="reserved">228</span></td> <td class="left"><a class="reserved" href="zip-0228">Asset Swaps for Zcash Shielded Assets</a></td> <td>Reserved</td>
<tr> <td>230</td> <td class="left"><a href="zip-0230">Version 6 Transaction Format</a></td> <td>Draft</td>
<tr> <td>231</td> <td class="left"><a href="zip-0231">Memo Bundles</a></td> <td>Draft</td>
<tr> <td>233</td> <td class="left"><a href="zip-0233">Network Sustainability Mechanism: Removing Funds From Circulation</a></td> <td>Draft</td>
<tr> <td>234</td> <td class="left"><a href="zip-0234">Network Sustainability Mechanism: Issuance Smoothing</a></td> <td>Draft</td>
<tr> <td>235</td> <td class="left"><a href="zip-0235">Remove 60% of Transaction Fees From Circulation</a></td> <td>Draft</td>
<tr> <td>245</td> <td class="left"><a href="zip-0245">Transaction Identifier Digests & Signature Validation for Transparent Zcash Extensions</a></td> <td>Draft</td>
<tr> <td>246</td> <td class="left"><a href="zip-0246">Digests for the Version 6 Transaction Format</a></td> <td>Draft</td>
<tr> <td>255</td> <td class="left"><a href="zip-0255">Deployment of the NU6.1 Network Upgrade</a></td> <td>Draft</td>
<tr> <td>302</td> <td class="left"><a href="zip-0302">Standardized Memo Field Format</a></td> <td>Draft</td>
<tr> <td><span class="reserved">303</span></td> <td class="left"><a class="reserved" href="zip-0303">Sprout Payment Disclosure</a></td> <td>Reserved</td>
<tr> <td>304</td> <td class="left"><a href="zip-0304">Sapling Address Signatures</a></td> <td>Draft</td>
<tr> <td><span class="reserved">305</span></td> <td class="left"><a class="reserved" href="zip-0305">Best Practices for Hardware Wallets supporting Sapling</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">306</span></td> <td class="left"><a class="reserved" href="zip-0306">Security Considerations for Anchor Selection</a></td> <td>Reserved</td>
<tr> <td>307</td> <td class="left"><a href="zip-0307">Light Client Protocol for Payment Detection</a></td> <td>Draft</td>
<tr> <td><span class="reserved">309</span></td> <td class="left"><a class="reserved" href="zip-0309">Blind Off-chain Lightweight Transactions (BOLT)</a></td> <td>Reserved</td>
<tr> <td>310</td> <td class="left"><a href="zip-0310">Security Properties of Sapling Viewing Keys</a></td> <td>Draft</td>
<tr> <td>311</td> <td class="left"><a href="zip-0311">Zcash Payment Disclosures</a></td> <td>Draft</td>
<tr> <td>312</td> <td class="left"><a href="zip-0312">FROST for Spend Authorization Multisignatures</a></td> <td>Draft</td>
<tr> <td><span class="reserved">314</span></td> <td class="left"><a class="reserved" href="zip-0314">Privacy upgrades to the Zcash light client protocol</a></td> <td>Reserved</td>
<tr> <td>315</td> <td class="left"><a href="zip-0315">Best Practices for Wallet Implementations</a></td> <td>Draft</td>
<tr> <td><span class="reserved">318</span></td> <td class="left"><a class="reserved" href="zip-0318">Associated Payload Encryption</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">319</span></td> <td class="left"><a class="reserved" href="zip-0319">Options for Shielded Pool Retirement</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">322</span></td> <td class="left"><a class="reserved" href="zip-0322">Generic Signed Message Format</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">323</span></td> <td class="left"><a class="reserved" href="zip-0323">Specification of getblocktemplate for Zcash</a></td> <td>Reserved</td>
<tr> <td>324</td> <td class="left"><a href="zip-0324">URI-Encapsulated Payments</a></td> <td>Draft</td>
<tr> <td>325</td> <td class="left"><a href="zip-0325">Account Metadata Keys</a></td> <td>Draft</td>
<tr> <td><span class="reserved">332</span></td> <td class="left"><a class="reserved" href="zip-0332">Wallet Recovery from zcashd HD Seeds</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">339</span></td> <td class="left"><a class="reserved" href="zip-0339">Wallet Recovery Words</a></td> <td>Reserved</td>
<tr> <td>400</td> <td class="left"><a href="zip-0400">Wallet.dat format</a></td> <td>Draft</td>
<tr> <td><span class="reserved">402</span></td> <td class="left"><a class="reserved" href="zip-0402">New Wallet Database Format</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">403</span></td> <td class="left"><a class="reserved" href="zip-0403">Verification Behaviour of zcashd</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">416</span></td> <td class="left"><a class="reserved" href="zip-0416">Support for Unified Addresses in zcashd</a></td> <td>Reserved</td>
<tr> <td>2002</td> <td class="left"><a href="zip-2002">Explicit Fees</a></td> <td>Draft</td>
<tr> <td>2003</td> <td class="left"><a href="zip-2003">Disallow version 4 transactions</a></td> <td>Draft</td>
<tr> <td>2004</td> <td class="left"><a href="zip-2004">Remove the dependency of consensus on note encryption</a></td> <td>Draft</td>
<tr> <td>guide-markdown</td> <td class="left"><a href="zip-guide-markdown">{Something Short and To the Point}</a></td> <td>Draft</td>
<tr> <td>guide</td> <td class="left"><a href="zip-guide">{Something Short and To the Point}</a></td> <td>Draft</td>
</table></embed></section>
<section id="drafts-without-assigned-zip-numbers"><h2><span class="section-heading">Drafts without assigned ZIP numbers</span><span class="section-anchor"> <a rel="bookmark" href="#drafts-without-assigned-zip-numbers"><img width="24" height="24" class="section-anchor" src="assets/images/section-anchor.png" alt=""></a></span></h2>
<p>These are works-in-progress, and may never be assigned ZIP numbers if their ideas become obsoleted or abandoned. Do not assume that these drafts will exist in perpetuity; instead assume that they will either move to a numbered ZIP, or be deleted.</p>
<embed><table>
<tr> <th>Title</th> </tr>
<tr> <td class="left"><a href="draft-arya-deploy-nu7">Deployment of the NU7 Network Upgrade</a></td>
<tr> <td class="left"><a href="draft-ecc-community-and-coinholder">Community and Coinholder Funding Model</a></td>
<tr> <td class="left"><a href="draft-ecc-lockbox-disbursement">Deferred Dev Fund Lockbox Disbursement</a></td>
<tr> <td class="left"><a href="draft-ecc-onchain-accountable-voting">On-chain Accountable Voting</a></td>
</table></embed></section>
<section id="withdrawn-rejected-or-obsolete-zips"><h2><span class="section-heading">Withdrawn, Rejected, or Obsolete ZIPs</span><span class="section-anchor"> <a rel="bookmark" href="#withdrawn-rejected-or-obsolete-zips"><img width="24" height="24" class="section-anchor" src="assets/images/section-anchor.png" alt=""></a></span></h2>
<details>
<summary>Click to show/hide</summary>
<embed><table>
<tr> <th>ZIP</th> <th>Title</th> <th>Status</th> </tr>
<tr> <td><strike>210</strike></td> <td class="left"><strike><a href="zip-0210">Sapling Anchor Deduplication within Transactions</a></strike></td> <td>Withdrawn</td>
<tr> <td><strike>220</strike></td> <td class="left"><strike><a href="zip-0220">Zcash Shielded Assets</a></strike></td> <td>Withdrawn</td>
<tr> <td><strike>254</strike></td> <td class="left"><strike><a href="zip-0254">Deployment of the NU7 Network Upgrade</a></strike></td> <td>Withdrawn</td>
<tr> <td><strike>313</strike></td> <td class="left"><strike><a href="zip-0313">Reduce Conventional Transaction Fee to 1000 zatoshis</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1001</strike></td> <td class="left"><strike><a href="zip-1001">Keep the Block Distribution as Initially Defined — 90% to Miners</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1002</strike></td> <td class="left"><strike><a href="zip-1002">Opt-in Donation Feature</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1003</strike></td> <td class="left"><strike><a href="zip-1003">20% Split Evenly Between the ECC and the Zcash Foundation, and a Voting System Mandate</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1004</strike></td> <td class="left"><strike><a href="zip-1004">Miner-Directed Dev Fund</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1005</strike></td> <td class="left"><strike><a href="zip-1005">Zcash Community Funding System</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1006</strike></td> <td class="left"><strike><a href="zip-1006">Development Fund of 10% to a 2-of-3 Multisig with Community-Involved Third Entity</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1007</strike></td> <td class="left"><strike><a href="zip-1007">Enforce Development Fund Commitments with a Legal Charter</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1008</strike></td> <td class="left"><strike><a href="zip-1008">Fund ECC for Two More Years</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1009</strike></td> <td class="left"><strike><a href="zip-1009">Five-Entity Strategic Council</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1010</strike></td> <td class="left"><strike><a href="zip-1010">Compromise Dev Fund Proposal With Diverse Funding Streams</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1011</strike></td> <td class="left"><strike><a href="zip-1011">Decentralize the Dev Fee</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1012</strike></td> <td class="left"><strike><a href="zip-1012">Dev Fund to ECC + ZF + Major Grants</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1013</strike></td> <td class="left"><strike><a href="zip-1013">Keep It Simple, Zcashers: 10% to ECC, 10% to ZF</a></strike></td> <td>Obsolete</td>
</table></embed>
</details></section>
<section id="index-of-zips"><h2><span class="section-heading">Index of ZIPs</span><span class="section-anchor"> <a rel="bookmark" href="#index-of-zips"><img width="24" height="24" class="section-anchor" src="assets/images/section-anchor.png" alt=""></a></span></h2>
<embed><table>
<tr> <th>ZIP</th> <th>Title</th> <th>Status</th> </tr>
<tr> <td>0</td> <td class="left"><a href="zip-0000">ZIP Process</a></td> <td>Active</td>
<tr> <td><span class="reserved">1</span></td> <td class="left"><a class="reserved" href="zip-0001">Network Upgrade Policy and Scheduling</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">2</span></td> <td class="left"><a class="reserved" href="zip-0002">Design Considerations for Network Upgrades</a></td> <td>Reserved</td>
<tr> <td>32</td> <td class="left"><a href="zip-0032">Shielded Hierarchical Deterministic Wallets</a></td> <td>Final</td>
<tr> <td>68</td> <td class="left"><a href="zip-0068">Relative lock-time using consensus-enforced sequence numbers</a></td> <td>Draft</td>
<tr> <td><span class="reserved">76</span></td> <td class="left"><a class="reserved" href="zip-0076">Transaction Signature Validation before Overwinter</a></td> <td>Reserved</td>
<tr> <td>112</td> <td class="left"><a href="zip-0112">CHECKSEQUENCEVERIFY</a></td> <td>Draft</td>
<tr> <td>113</td> <td class="left"><a href="zip-0113">Median Time Past as endpoint for lock-time calculations</a></td> <td>Draft</td>
<tr> <td>143</td> <td class="left"><a href="zip-0143">Transaction Signature Validation for Overwinter</a></td> <td>Final</td>
<tr> <td>155</td> <td class="left"><a href="zip-0155">addrv2 message</a></td> <td>Proposed</td>
<tr> <td>173</td> <td class="left"><a href="zip-0173">Bech32 Format</a></td> <td>Final</td>
<tr> <td>200</td> <td class="left"><a href="zip-0200">Network Upgrade Mechanism</a></td> <td>Final</td>
<tr> <td>201</td> <td class="left"><a href="zip-0201">Network Peer Management for Overwinter</a></td> <td>Final</td>
<tr> <td>202</td> <td class="left"><a href="zip-0202">Version 3 Transaction Format for Overwinter</a></td> <td>Final</td>
<tr> <td>203</td> <td class="left"><a href="zip-0203">Transaction Expiry</a></td> <td>Final</td>
<tr> <td><span class="reserved">204</span></td> <td class="left"><a class="reserved" href="zip-0204">Zcash P2P Network Protocol</a></td> <td>Reserved</td>
<tr> <td>205</td> <td class="left"><a href="zip-0205">Deployment of the Sapling Network Upgrade</a></td> <td>Final</td>
<tr> <td>206</td> <td class="left"><a href="zip-0206">Deployment of the Blossom Network Upgrade</a></td> <td>Final</td>
<tr> <td>207</td> <td class="left"><a href="zip-0207">Funding Streams</a></td> <td>[Canopy, NU6] Final</td>
<tr> <td>208</td> <td class="left"><a href="zip-0208">Shorter Block Target Spacing</a></td> <td>Final</td>
<tr> <td>209</td> <td class="left"><a href="zip-0209">Prohibit Negative Shielded Chain Value Pool Balances</a></td> <td>Final</td>
<tr> <td><strike>210</strike></td> <td class="left"><strike><a href="zip-0210">Sapling Anchor Deduplication within Transactions</a></strike></td> <td>Withdrawn</td>
<tr> <td>211</td> <td class="left"><a href="zip-0211">Disabling Addition of New Value to the Sprout Chain Value Pool</a></td> <td>Final</td>
<tr> <td>212</td> <td class="left"><a href="zip-0212">Allow Recipient to Derive Ephemeral Secret from Note Plaintext</a></td> <td>Final</td>
<tr> <td>213</td> <td class="left"><a href="zip-0213">Shielded Coinbase</a></td> <td>Final</td>
<tr> <td>214</td> <td class="left"><a href="zip-0214">Consensus rules for a Zcash Development Fund</a></td> <td>[Revision 0: Canopy, Revision 1: NU6] Final</td>
<tr> <td>215</td> <td class="left"><a href="zip-0215">Explicitly Defining and Modifying Ed25519 Validation Rules</a></td> <td>Final</td>
<tr> <td>216</td> <td class="left"><a href="zip-0216">Require Canonical Jubjub Point Encodings</a></td> <td>Final</td>
<tr> <td><span class="reserved">217</span></td> <td class="left"><a class="reserved" href="zip-0217">Aggregate Signatures</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">219</span></td> <td class="left"><a class="reserved" href="zip-0219">Disabling Addition of New Value to the Sapling Chain Value Pool</a></td> <td>Reserved</td>
<tr> <td><strike>220</strike></td> <td class="left"><strike><a href="zip-0220">Zcash Shielded Assets</a></strike></td> <td>Withdrawn</td>
<tr> <td>221</td> <td class="left"><a href="zip-0221">FlyClient - Consensus-Layer Changes</a></td> <td>Final</td>
<tr> <td>222</td> <td class="left"><a href="zip-0222">Transparent Zcash Extensions</a></td> <td>Draft</td>
<tr> <td>224</td> <td class="left"><a href="zip-0224">Orchard Shielded Protocol</a></td> <td>Final</td>
<tr> <td>225</td> <td class="left"><a href="zip-0225">Version 5 Transaction Format</a></td> <td>Final</td>
<tr> <td>226</td> <td class="left"><a href="zip-0226">Transfer and Burn of Zcash Shielded Assets</a></td> <td>Draft</td>
<tr> <td>227</td> <td class="left"><a href="zip-0227">Issuance of Zcash Shielded Assets</a></td> <td>Draft</td>
<tr> <td><span class="reserved">228</span></td> <td class="left"><a class="reserved" href="zip-0228">Asset Swaps for Zcash Shielded Assets</a></td> <td>Reserved</td>
<tr> <td>230</td> <td class="left"><a href="zip-0230">Version 6 Transaction Format</a></td> <td>Draft</td>
<tr> <td>231</td> <td class="left"><a href="zip-0231">Memo Bundles</a></td> <td>Draft</td>
<tr> <td>233</td> <td class="left"><a href="zip-0233">Network Sustainability Mechanism: Removing Funds From Circulation</a></td> <td>Draft</td>
<tr> <td>234</td> <td class="left"><a href="zip-0234">Network Sustainability Mechanism: Issuance Smoothing</a></td> <td>Draft</td>
<tr> <td>235</td> <td class="left"><a href="zip-0235">Remove 60% of Transaction Fees From Circulation</a></td> <td>Draft</td>
<tr> <td>236</td> <td class="left"><a href="zip-0236">Blocks should balance exactly</a></td> <td>Final</td>
<tr> <td>239</td> <td class="left"><a href="zip-0239">Relay of Version 5 Transactions</a></td> <td>Final</td>
<tr> <td>243</td> <td class="left"><a href="zip-0243">Transaction Signature Validation for Sapling</a></td> <td>Final</td>
<tr> <td>244</td> <td class="left"><a href="zip-0244">Transaction Identifier Non-Malleability</a></td> <td>Final</td>
<tr> <td>245</td> <td class="left"><a href="zip-0245">Transaction Identifier Digests & Signature Validation for Transparent Zcash Extensions</a></td> <td>Draft</td>
<tr> <td>246</td> <td class="left"><a href="zip-0246">Digests for the Version 6 Transaction Format</a></td> <td>Draft</td>
<tr> <td>250</td> <td class="left"><a href="zip-0250">Deployment of the Heartwood Network Upgrade</a></td> <td>Final</td>
<tr> <td>251</td> <td class="left"><a href="zip-0251">Deployment of the Canopy Network Upgrade</a></td> <td>Final</td>
<tr> <td>252</td> <td class="left"><a href="zip-0252">Deployment of the NU5 Network Upgrade</a></td> <td>Final</td>
<tr> <td>253</td> <td class="left"><a href="zip-0253">Deployment of the NU6 Network Upgrade</a></td> <td>Final</td>
<tr> <td><strike>254</strike></td> <td class="left"><strike><a href="zip-0254">Deployment of the NU7 Network Upgrade</a></strike></td> <td>Withdrawn</td>
<tr> <td>255</td> <td class="left"><a href="zip-0255">Deployment of the NU6.1 Network Upgrade</a></td> <td>Draft</td>
<tr> <td>300</td> <td class="left"><a href="zip-0300">Cross-chain Atomic Transactions</a></td> <td>Proposed</td>
<tr> <td>301</td> <td class="left"><a href="zip-0301">Zcash Stratum Protocol</a></td> <td>Active</td>
<tr> <td>302</td> <td class="left"><a href="zip-0302">Standardized Memo Field Format</a></td> <td>Draft</td>
<tr> <td><span class="reserved">303</span></td> <td class="left"><a class="reserved" href="zip-0303">Sprout Payment Disclosure</a></td> <td>Reserved</td>
<tr> <td>304</td> <td class="left"><a href="zip-0304">Sapling Address Signatures</a></td> <td>Draft</td>
<tr> <td><span class="reserved">305</span></td> <td class="left"><a class="reserved" href="zip-0305">Best Practices for Hardware Wallets supporting Sapling</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">306</span></td> <td class="left"><a class="reserved" href="zip-0306">Security Considerations for Anchor Selection</a></td> <td>Reserved</td>
<tr> <td>307</td> <td class="left"><a href="zip-0307">Light Client Protocol for Payment Detection</a></td> <td>Draft</td>
<tr> <td>308</td> <td class="left"><a href="zip-0308">Sprout to Sapling Migration</a></td> <td>Active</td>
<tr> <td><span class="reserved">309</span></td> <td class="left"><a class="reserved" href="zip-0309">Blind Off-chain Lightweight Transactions (BOLT)</a></td> <td>Reserved</td>
<tr> <td>310</td> <td class="left"><a href="zip-0310">Security Properties of Sapling Viewing Keys</a></td> <td>Draft</td>
<tr> <td>311</td> <td class="left"><a href="zip-0311">Zcash Payment Disclosures</a></td> <td>Draft</td>
<tr> <td>312</td> <td class="left"><a href="zip-0312">FROST for Spend Authorization Multisignatures</a></td> <td>Draft</td>
<tr> <td><strike>313</strike></td> <td class="left"><strike><a href="zip-0313">Reduce Conventional Transaction Fee to 1000 zatoshis</a></strike></td> <td>Obsolete</td>
<tr> <td><span class="reserved">314</span></td> <td class="left"><a class="reserved" href="zip-0314">Privacy upgrades to the Zcash light client protocol</a></td> <td>Reserved</td>
<tr> <td>315</td> <td class="left"><a href="zip-0315">Best Practices for Wallet Implementations</a></td> <td>Draft</td>
<tr> <td>316</td> <td class="left"><a href="zip-0316">Unified Addresses and Unified Viewing Keys</a></td> <td>[Revision 0] Active, [Revision 1] Proposed</td>
<tr> <td>317</td> <td class="left"><a href="zip-0317">Proportional Transfer Fee Mechanism</a></td> <td>Active</td>
<tr> <td><span class="reserved">318</span></td> <td class="left"><a class="reserved" href="zip-0318">Associated Payload Encryption</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">319</span></td> <td class="left"><a class="reserved" href="zip-0319">Options for Shielded Pool Retirement</a></td> <td>Reserved</td>
<tr> <td>320</td> <td class="left"><a href="zip-0320">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="zip-0321">Payment Request URIs</a></td> <td>Active</td>
<tr> <td><span class="reserved">322</span></td> <td class="left"><a class="reserved" href="zip-0322">Generic Signed Message Format</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">323</span></td> <td class="left"><a class="reserved" href="zip-0323">Specification of getblocktemplate for Zcash</a></td> <td>Reserved</td>
<tr> <td>324</td> <td class="left"><a href="zip-0324">URI-Encapsulated Payments</a></td> <td>Draft</td>
<tr> <td>325</td> <td class="left"><a href="zip-0325">Account Metadata Keys</a></td> <td>Draft</td>
<tr> <td><span class="reserved">332</span></td> <td class="left"><a class="reserved" href="zip-0332">Wallet Recovery from zcashd HD Seeds</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">339</span></td> <td class="left"><a class="reserved" href="zip-0339">Wallet Recovery Words</a></td> <td>Reserved</td>
<tr> <td>400</td> <td class="left"><a href="zip-0400">Wallet.dat format</a></td> <td>Draft</td>
<tr> <td>401</td> <td class="left"><a href="zip-0401">Addressing Mempool Denial-of-Service</a></td> <td>Active</td>
<tr> <td><span class="reserved">402</span></td> <td class="left"><a class="reserved" href="zip-0402">New Wallet Database Format</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">403</span></td> <td class="left"><a class="reserved" href="zip-0403">Verification Behaviour of zcashd</a></td> <td>Reserved</td>
<tr> <td><span class="reserved">416</span></td> <td class="left"><a class="reserved" href="zip-0416">Support for Unified Addresses in zcashd</a></td> <td>Reserved</td>
<tr> <td><strike>1001</strike></td> <td class="left"><strike><a href="zip-1001">Keep the Block Distribution as Initially Defined — 90% to Miners</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1002</strike></td> <td class="left"><strike><a href="zip-1002">Opt-in Donation Feature</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1003</strike></td> <td class="left"><strike><a href="zip-1003">20% Split Evenly Between the ECC and the Zcash Foundation, and a Voting System Mandate</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1004</strike></td> <td class="left"><strike><a href="zip-1004">Miner-Directed Dev Fund</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1005</strike></td> <td class="left"><strike><a href="zip-1005">Zcash Community Funding System</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1006</strike></td> <td class="left"><strike><a href="zip-1006">Development Fund of 10% to a 2-of-3 Multisig with Community-Involved Third Entity</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1007</strike></td> <td class="left"><strike><a href="zip-1007">Enforce Development Fund Commitments with a Legal Charter</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1008</strike></td> <td class="left"><strike><a href="zip-1008">Fund ECC for Two More Years</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1009</strike></td> <td class="left"><strike><a href="zip-1009">Five-Entity Strategic Council</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1010</strike></td> <td class="left"><strike><a href="zip-1010">Compromise Dev Fund Proposal With Diverse Funding Streams</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1011</strike></td> <td class="left"><strike><a href="zip-1011">Decentralize the Dev Fee</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1012</strike></td> <td class="left"><strike><a href="zip-1012">Dev Fund to ECC + ZF + Major Grants</a></strike></td> <td>Obsolete</td>
<tr> <td><strike>1013</strike></td> <td class="left"><strike><a href="zip-1013">Keep It Simple, Zcashers: 10% to ECC, 10% to ZF</a></strike></td> <td>Obsolete</td>
<tr> <td>1014</td> <td class="left"><a href="zip-1014">Establishing a Dev Fund for ECC, ZF, and Major Grants</a></td> <td>Active</td>
<tr> <td>1015</td> <td class="left"><a href="zip-1015">Block Subsidy Allocation for Non-Direct Development Funding</a></td> <td>Final</td>
<tr> <td>2001</td> <td class="left"><a href="zip-2001">Lockbox Funding Streams</a></td> <td>Final</td>
<tr> <td>2002</td> <td class="left"><a href="zip-2002">Explicit Fees</a></td> <td>Draft</td>
<tr> <td>2003</td> <td class="left"><a href="zip-2003">Disallow version 4 transactions</a></td> <td>Draft</td>
<tr> <td>2004</td> <td class="left"><a href="zip-2004">Remove the dependency of consensus on note encryption</a></td> <td>Draft</td>
<tr> <td>guide-markdown</td> <td class="left"><a href="zip-guide-markdown">{Something Short and To the Point}</a></td> <td>Draft</td>
<tr> <td>guide</td> <td class="left"><a href="zip-guide">{Something Short and To the Point}</a></td> <td>Draft</td>
</table></embed></section>
</section>
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