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<ol class="chapter"><li class="chapter-item expanded affix "><a href="../introduction.html">Introduction</a></li><li class="spacer"></li><li class="chapter-item expanded affix "><li class="part-title">Approved</li><li class="chapter-item expanded "><a href="../approved/0001-agile-coretime.html">RFC-1: Agile Coretime</a></li><li class="chapter-item expanded "><a href="../approved/0005-coretime-interface.html">RFC-5: Coretime Interface</a></li><li class="chapter-item expanded "><a href="../approved/0007-system-collator-selection.html">RFC-0007: System Collator Selection</a></li><li class="chapter-item expanded "><a href="../approved/0008-parachain-bootnodes-dht.html">RFC-0008: Store parachain bootnodes in relay chain DHT</a></li><li class="chapter-item expanded "><a href="../approved/0012-process-for-adding-new-collectives.html">RFC-0012: Process for Adding New System Collectives</a></li><li class="chapter-item expanded "><a href="../approved/0014-improve-locking-mechanism-for-parachains.html">RFC-0014: Improve locking mechanism for parachains</a></li><li class="chapter-item expanded "><a href="../approved/0022-adopt-encointer-runtime.html">RFC-0022: Adopt Encointer Runtime</a></li><li class="chapter-item expanded "><a href="../approved/0032-minimal-relay.html">RFC-0032: Minimal Relay</a></li><li class="chapter-item expanded "><a href="../approved/0050-fellowship-salaries.html">RFC-0050: Fellowship Salaries</a></li><li class="chapter-item expanded "><a href="../approved/0056-one-transaction-per-notification.html">RFC-0056: Enforce only one transaction per notification</a></li><li class="spacer"></li><li class="chapter-item expanded affix "><li class="part-title">Newly Proposed</li><li class="spacer"></li><li class="chapter-item expanded affix "><li class="part-title">Proposed</li><li class="chapter-item expanded "><a href="../proposed/0004-remove-unnecessary-allocator-usage.html">RFC-0004: Remove the host-side runtime memory allocator</a></li><li class="chapter-item expanded "><a href="../proposed/000x-assethub.html" class="active">RFC-0000: Lowering NFT Deposits on Polkadot and Kusama Asset Hubs</a></li><li class="chapter-item expanded "><a href="../proposed/0026-sassafras-consensus.html">RFC-0026: Sassafras Consensus Protocol</a></li><li class="chapter-item expanded "><a href="../proposed/0034-xcm-absolute-location-account-derivation.html">RFC-34: XCM Absolute Location Account Derivation</a></li><li class="chapter-item expanded "><a href="../proposed/0042-extrinsics-state-version.html">RFC-0042: Add System version that replaces StateVersion on RuntimeVersion</a></li><li class="chapter-item expanded "><a href="../proposed/0044-rent-based-registration.html">RFC-0044: Rent based registration model</a></li><li class="chapter-item expanded "><a href="../proposed/0046-metadata-for-offline-signers.html">RFC-0000: Metadata for offline signers</a></li><li class="chapter-item expanded "><a href="../proposed/0047-assignment-of-availability-chunks.html">RFC-0047: Assignment of availability chunks to validators</a></li><li class="chapter-item expanded "><a href="../proposed/0059-nodes-capabilities-discovery.html">RFC-0059: Add a discovery mechanism for nodes based on their capabilities</a></li><li class="chapter-item expanded "><a href="../proposed/0061-allocator-inside-of-runtime.html">RFC-0061: Support allocator inside of runtime</a></li><li class="chapter-item expanded "><a href="../proposed/0062-lowering-existential-deposit-on-assethub.html">RFC-0062: Lowering Existential Deposit on Asset Hub for Polkadot</a></li><li class="spacer"></li><li class="chapter-item expanded affix "><li class="part-title">Stale</li><li class="chapter-item expanded "><a href="../stale/0006-dynamic-pricing-for-bulk-coretime-sales.html">RFC-0006: Dynamic Pricing for Bulk Coretime Sales</a></li><li class="chapter-item expanded "><a href="../stale/0009-improved-net-light-client-requests.html">RFC-0009: Improved light client requests networking protocol</a></li><li class="chapter-item expanded "><a href="../stale/0010-burn-coretime-revenue.html">RFC-0010: Burn Coretime Revenue</a></li><li class="chapter-item expanded "><a href="../stale/0011-add-new-path-to-account-creation-on-asset-hubs.html">RFC-0011: Add New Path to Account Creation on Asset Hubs</a></li><li class="chapter-item expanded "><a href="../stale/0013-prepare-blockbuilder-and-core-runtime-apis-for-mbms.html">RFC-0013: Prepare BlockBuilder and Core runtime APIs for MBMs</a></li><li class="chapter-item expanded "><a href="../stale/0015-market-design-revisit.html">RFC-0015: Market Design Revisit</a></li><li class="chapter-item expanded "><a href="../stale/0020-treasurer-track-confirmation-period-duration-modification.html">RFC-0020: Treasurer Track Confirmation Period Duration Modification</a></li><li class="chapter-item expanded "><a href="../stale/0035-conviction-voting-delegation-modifications.html"> RFC-0035: Conviction Voting Delegation Modifications</a></li><li class="chapter-item expanded "><a href="../stale/0043-storage-proof-size-hostfunction.html">RFC-0043: Introduce storage_proof_size Host Function for Improved Parachain Block Utilization</a></li><li class="chapter-item expanded "><a href="../stale/0048-session-keys-runtime-api.html">RFC-0048: Generate ownership proof for SessionKeys</a></li><li class="chapter-item expanded "><a href="../stale/0054-remove-heap-pages.html">RFC-0054: Remove the concept of "heap pages" from the client</a></li></ol>
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<h1 class="menu-title">Polkadot Fellowship RFCs</h1>
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<p><a href="https://github.com/polkadot-fellows/RFCs/pull/45">(source)</a></p>
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<p><strong>Table of Contents</strong></p>
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<ul>
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<li><a href="#rfc-0000-lowering-nft-deposits-on-polkadot-and-kusama-asset-hubs">RFC-0000: Lowering NFT Deposits on Polkadot and Kusama Asset Hubs</a>
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<ul>
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<li><a href="#summary">Summary</a></li>
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<li><a href="#motivation">Motivation</a>
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<ul>
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<li><a href="#requirements">Requirements</a></li>
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</ul>
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</li>
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<li><a href="#stakeholders">Stakeholders</a></li>
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<li><a href="#explanation">Explanation</a></li>
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<li><a href="#drawbacks">Drawbacks</a></li>
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<li><a href="#testing-security-and-privacy">Testing, Security, and Privacy</a></li>
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<li><a href="#performance-ergonomics-and-compatibility">Performance, Ergonomics, and Compatibility</a>
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<ul>
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<li><a href="#performance">Performance</a></li>
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<li><a href="#ergonomics">Ergonomics</a></li>
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<li><a href="#compatibility">Compatibility</a></li>
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</ul>
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<li><a href="#unresolved-questions">Unresolved Questions</a></li>
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<li><a href="#future-directions-and-related-material">Future Directions and Related Material</a></li>
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<h1 id="rfc-0000-lowering-nft-deposits-on-polkadot-and-kusama-asset-hubs"><a class="header" href="#rfc-0000-lowering-nft-deposits-on-polkadot-and-kusama-asset-hubs">RFC-0000: Lowering NFT Deposits on Polkadot and Kusama Asset Hubs</a></h1>
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<div class="table-wrapper"><table><thead><tr><th></th><th></th></tr></thead><tbody>
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<tr><td><strong>Start Date</strong></td><td>2 November 2023</td></tr>
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<tr><td><strong>Description</strong></td><td>A proposal to reduce the minimum deposit required for collection creation on the Polkadot and Kusama Asset Hub, making it more accessible and affordable for artists.</td></tr>
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<tr><td><strong>Authors</strong></td><td><a href="https://github.com/poppyseedDev">Aurora Poppyseed</a>, <a href="https://github.com/justLuuuu">Just_Luuuu</a>, <a href="https://github.com/vikiival">Viki Val</a></td></tr>
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</tbody></table>
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</div>
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<h2 id="summary"><a class="header" href="#summary">Summary</a></h2>
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<p>This RFC proposes changing the current deposit requirements on the Polkadot and Kusama Asset Hub for creating NFT collections. The objective is to lower the barrier to entry for artists, fostering a more inclusive and vibrant ecosystem while maintaining network integrity and preventing spam.</p>
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<h2 id="motivation"><a class="header" href="#motivation">Motivation</a></h2>
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<p>The current deposit of 10 DOT for collection creation on the Polkadot Asset Hub presents a significant financial barrier for many artists. By lowering the deposit requirements, we aim to encourage more artists to participate in the Polkadot NFT ecosystem, thereby enriching the diversity and vibrancy of the community and its offerings.</p>
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<p>The actual implementation of the deposit is an arbitrary number coming from <a href="https://github.com/paritytech/polkadot-sdk/blob/master/cumulus/parachains/runtimes/assets/asset-hub-rococo/src/lib.rs#L757">Uniques pallet</a>. It is not a result of any economic analysis. This proposal aims to adjust the deposit from constant to dynamic pricing based on the <code>deposit</code> function with respect to stakeholders.</p>
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<h3 id="requirements"><a class="header" href="#requirements">Requirements</a></h3>
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<ul>
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<li>Deposit SHOULD be derived from <code>deposit</code> function adjusted by correspoding pricing mechansim.</li>
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</ul>
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<h2 id="stakeholders"><a class="header" href="#stakeholders">Stakeholders</a></h2>
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<ul>
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<li><strong>NFT Creators</strong>: Primary beneficiaries of the proposed change, particularly those who found the current deposit requirements prohibitive.</li>
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<li><strong>NFT Platforms</strong>: As the facilitator of artists' relations, NFT Marketplaces has a vested interest in onboarding new users and making the platform more accessible.</li>
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<li><strong>dApp Developers</strong>: Making the blockspace more accessible will encourage developers to create and build unique dApps in the Polkadot ecosystem.</li>
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<li><strong>Polkadot Community</strong>: Stands to benefit from an influx of artists, creators and diverse NFT collections, enhancing the overall ecosystem.</li>
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</ul>
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<p>Previous discussions have been held within the Polkadot Forum community and with artists expressing their concerns about the deposit amounts. <a href="https://forum.polkadot.network/t/polkadot-assethub-high-nft-collection-deposit/4262">Link</a>.</p>
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<h2 id="explanation"><a class="header" href="#explanation">Explanation</a></h2>
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<p>This RFC suggests modifying deposit constants defined in the <code>nfts</code> pallet on the Polkadot Asset Hub to require a lower deposit. The reduced deposit amount should be determined by the <code>deposit</code> adjusted by the pricing mechanism (arbitrary number/another pricing function). </p>
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<p><a href="https://github.com/paritytech/polkadot-sdk/blob/master/cumulus/parachains/runtimes/assets/asset-hub-rococo/src/lib.rs#L757">Current deposit requirements are as follows</a>:</p>
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<pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span>parameter_types! {
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// re-use the Uniques deposits
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pub const NftsCollectionDeposit: Balance = UniquesCollectionDeposit::get();
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pub const NftsItemDeposit: Balance = UniquesItemDeposit::get();
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pub const NftsMetadataDepositBase: Balance = UniquesMetadataDepositBase::get();
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pub const NftsAttributeDepositBase: Balance = UniquesAttributeDepositBase::get();
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pub const NftsDepositPerByte: Balance = UniquesDepositPerByte::get();
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}
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//
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parameter_types! {
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pub const UniquesCollectionDeposit: Balance = UNITS / 10; // 1 / 10 UNIT deposit to create a collection
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pub const UniquesItemDeposit: Balance = UNITS / 1_000; // 1 / 1000 UNIT deposit to mint an item
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pub const UniquesMetadataDepositBase: Balance = deposit(1, 129);
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pub const UniquesAttributeDepositBase: Balance = deposit(1, 0);
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pub const UniquesDepositPerByte: Balance = deposit(0, 1);
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}
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<span class="boring">}</span></code></pre></pre>
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<p>The proposed change would modify the deposit constants to require a lower deposit. The reduced deposit amount should be determined by <code>deposit</code> adjusted by an arbitrary number.</p>
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<pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span>parameter_types! {
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pub const NftsCollectionDeposit: Balance = deposit(1, 130);
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pub const NftsItemDeposit: Balance = deposit(1, 164) / 40;
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pub const NftsMetadataDepositBase: Balance = deposit(1, 129) / 10;
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pub const NftsAttributeDepositBase: Balance = deposit(1, 0) / 10;
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pub const NftsDepositPerByte: Balance = deposit(0, 1);
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}
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<span class="boring">}</span></code></pre></pre>
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<p><strong>Prices and Proposed Prices on Polkadot Asset Hub:</strong>
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<em>Scroll right</em></p>
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<pre><code>| **Name** | **Current price implementation** | **Price if DOT = 5$** | **Price if DOT goes to 50$** | **Proposed Price in DOT** | **Proposed Price if DOT = 5$** | **Proposed Price if DOT goes to 50$**|
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|---------------------------|----------------------------------|------------------------|-------------------------------|---------------------------|----------------------------------|--------------------------------------|
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| collectionDeposit | 10 DOT | 50 $ | 500 $ | 0.20064 DOT | ~1 $ | 10.32$ |
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| itemDeposit | 0.01 DOT | 0.05 $ | 0.5 $ | 0.005 DOT | 0.025 $ | 0.251$ |
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| metadataDepositBase | 0.20129 DOT | 1.00645 $ | 10.0645 $ | 0.0020129 DOT | 0.0100645 $ | 0.100645$ |
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| attributeDepositBase | 0.2 DOT | 1 $ | 10 $ | 0.002 DOT | 0.01 $ | 0.1$ |
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</code></pre>
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<p><strong>Prices and Proposed Prices on Kusama Asset Hub:</strong>
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<em>Scroll right</em></p>
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<pre><code>| **Name** | **Current price implementation** | **Price if KSM = 23$** | **Price if KSM goes to 500$** | **Proposed Price in KSM** | **Proposed Price if KSM = 23$** | **Proposed Price if KSM goes to 500$** |
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|---------------------------|----------------------------------|------------------------|-------------------------------|---------------------------|----------------------------------|----------------------------------------|
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| collectionDeposit | 0.1 KSM | 2.3 $ | 50 $ | 0.006688 KSM | 0.154 $ | 3.34 $ |
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| itemDeposit | 0.001 KSM | 0.023 $ | 0.5 $ | 0.000167 KSM | 0.00385 $ | 0.0835 $ |
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| metadataDepositBase | 0.006709666617 KSM | 0.15432183319 $ | 3.3548333085 $ | 0.0006709666617 KSM | 0.015432183319 $ | 0.33548333085 $ |
|
||
| attributeDepositBase | 0.00666666666 KSM | 0.15333333318 $ | 3.333333333 $ | 0.000666666666 KSM | 0.015333333318 $ | 0.3333333333 $ |
|
||
|
||
</code></pre>
|
||
<blockquote>
|
||
<p>Note: This is only a proposal for change and can be modified upon additional conversation.</p>
|
||
</blockquote>
|
||
<h2 id="drawbacks"><a class="header" href="#drawbacks">Drawbacks</a></h2>
|
||
<p>Modifying deposit requirements necessitates a balanced assessment of the potential drawbacks. Highlighted below are cogent points extracted from the discourse on the <a href="https://forum.polkadot.network/t/polkadot-assethub-high-nft-collection-deposit/4262">Polkadot Forum conversation</a>, which provide critical perspectives on the implications of such changes:</p>
|
||
<blockquote>
|
||
<p>But NFT deposits were chosen somewhat arbitrarily at genesis and it’s a good exercise to re-evaluate them and adapt if they are causing pain and if lowering them has little or no negative side effect (or if the trade-off is worth it).
|
||
-> joepetrowski</p>
|
||
</blockquote>
|
||
<blockquote>
|
||
<p>Underestimates mean that state grows faster, although not unbounded - effectively an economic subsidy on activity. Overestimates mean that the state grows slower - effectively an economic depressant on activity.
|
||
-> rphmeier</p>
|
||
</blockquote>
|
||
<blockquote>
|
||
<p>Technical: We want to prevent state bloat, therefore using state should have a cost associated with it.
|
||
-> joepetrowski</p>
|
||
</blockquote>
|
||
<h2 id="testing-security-and-privacy"><a class="header" href="#testing-security-and-privacy">Testing, Security, and Privacy</a></h2>
|
||
<p>The change is backwards compatible. The prevention of "spam" could be prevented by OpenGov proposal to <code>forceDestoy</code> list of collections that are not suitable.</p>
|
||
<h2 id="performance-ergonomics-and-compatibility"><a class="header" href="#performance-ergonomics-and-compatibility">Performance, Ergonomics, and Compatibility</a></h2>
|
||
<h3 id="performance"><a class="header" href="#performance">Performance</a></h3>
|
||
<p>This change is not expected to have a significant impact on the overall performance of the Polkadot Asset Hub. However, monitoring the network closely, especially in the initial stages after implementation, is crucial to identify and mitigate any potential issues.</p>
|
||
<p>Additionally, a supplementary proposal aims to augment the network's adaptability:</p>
|
||
<blockquote>
|
||
<p>Just from a technical perspective; I think the best we can do is to use a weak governance origin that is controlled by some consortium (ie. System Collective).
|
||
This origin could then update the NFT deposits any time the market conditions warrant it - obviously while honoring the storage deposit requirements.
|
||
To implement this, we need RFC#12 and the Parameters pallet from @xlc.
|
||
-> OliverTY</p>
|
||
</blockquote>
|
||
<p>This dynamic governance approach would facilitate a responsive and agile economic model for deposit management, ensuring that the network remains accessible and robust in the face of market volatility.</p>
|
||
<h3 id="ergonomics"><a class="header" href="#ergonomics">Ergonomics</a></h3>
|
||
<p>The proposed change aims to enhance the user experience for artists, making Polkadot more accessible and user-friendly.</p>
|
||
<h3 id="compatibility"><a class="header" href="#compatibility">Compatibility</a></h3>
|
||
<p>The change does not impact compatibility as <code>redeposit</code> function is already implemented.</p>
|
||
<h2 id="unresolved-questions"><a class="header" href="#unresolved-questions">Unresolved Questions</a></h2>
|
||
<ul>
|
||
<li></li>
|
||
</ul>
|
||
<h2 id="future-directions-and-related-material"><a class="header" href="#future-directions-and-related-material">Future Directions and Related Material</a></h2>
|
||
<ul>
|
||
<li></li>
|
||
</ul>
|
||
<p>If accepted, this RFC could pave the way for further discussions and proposals aimed at enhancing the inclusivity and accessibility of the Polkadot ecosystem. Future work could also explore having a weak governance origin for deposits as proposed by Oliver.</p>
|
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