Abstract
Moonbeam/Moonriver changed the way XCM execution fee is calculated. Hydration and Apillon teams had XCM Interfaces that did not use our XCM SDK; therefore, they misconfigured XCM transfers, which resulted in failed executions in Moonbeam.
This proposal is to return funds to users affected by this.
Details
Hydration and Apillon XCM Apps had a fixed fee of 0.03 USDT to transfer PINK and NCTR from AssetHub-Polkadot to Moonbeam. This resulted in some <a href="https://assethub-polkadot.subscan.io/xcm_message?page=1&amp;time_dimension=date&amp;result=failed&amp;fromChain=1000&amp;toChain=2004">XCM failing execution on the Moonbeam end</a>. The following were affected by the bug in the Apps:
<ul>
<li><a href="https://assethub-polkadot.subscan.io/xcm_message/polkadot-5cd474dbae14bf9a72f008f7ce141947d86687de">https://assethub-polkadot.subscan.io/xcm_message/polkadot-5cd474dbae14bf9a72f008f7ce141947d86687de</a></li>
<li><a href="https://assethub-polkadot.subscan.io/xcm_message/polkadot-c9340c6b40f7e310662fe0c387c6803bddb30cc2">https://assethub-polkadot.subscan.io/xcm_message/polkadot-c9340c6b40f7e310662fe0c387c6803bddb30cc2</a></li>
<li><a href="https://assethub-polkadot.subscan.io/xcm_message/polkadot-694ddf2f3e4883622c1fbfcbb608700697091aa9">https://assethub-polkadot.subscan.io/xcm_message/polkadot-694ddf2f3e4883622c1fbfcbb608700697091aa9</a></li>
<li><a href="https://assethub-polkadot.subscan.io/xcm_message/polkadot-766fcbd90876b0ad2087e2d0c1d1722fbfd0e3c0">https://assethub-polkadot.subscan.io/xcm_message/polkadot-766fcbd90876b0ad2087e2d0c1d1722fbfd0e3c0</a></li>
</ul>
Thus, funds were transferred to Moonbeam's Sovereign account in AH-Polkadot but Moonbeam chain did not minted the XC-20 representation.
Therefore, this is the status right now:
Sovereign Account in AH:
<pre><code>2,123,060,949.469 PINK
100,124,065.324 NCTR
</code></pre>
XC-20s:
<pre><code>2,122,938,979.2574842 xcPINK 
00,119,876.41378367 xcNCTR
</code></pre>
Asset Hub Positive Balance (held - XC20s) :
<pre><code>121,970.2115158 PINK
4,188.91021633 NCTR
</code></pre>
User's assets locked are:
<pre><code>121,959.151 PINK
4,187 NCTR
</code></pre>
This proposal sends an XCM message to our Sovereign account in AssetHub-Polkadot to transferred such funds back to the user.
It was tested via Chopsticks. Preimage <code>0xb7cccd52907900f7df4bdfc3c87a3d26a4837218cae16e4f2f9ca634aab4898c</code>
<img src="upload://sMpI7BwhgjqkSLLV95QwKLWGN9y.png" alt="image|690x373" /> <img src="upload://9M7hqdDhfGKXCBIA7dmISWKMgsZ.png" alt="image|690x368" /> <img src="upload://57ITUhh04W4sQFJUzlrKpu3rZzW.png" alt="image|690x376" /> <img src="upload://3dMcbkbmH0DbRCJFYO9jS6VVDEM.png" alt="image|690x368" />
The balance of our Sovereign account in AH-Polkadot still holds a bit more tokens than the XC-20s available in Moonbeam (means everything is OK).

Transact the call through the sovereign account in a destination chain,
'fee_payer' pays for the fee

SovereignAccountDispatcherOrigin callable only

- **Problem Statement:** Hydration and Apillon XCM Apps misconfigured XCM transfers, resulting in failed executions in Moonbeam.
- **Significance:** Funds were transferred to Moonbeam's Sovereign account but not minted, affecting users' assets.
- **Proposed Solution:** Send an XCM message to transfer funds back to affected users from the Sovereign account in AssetHub-Polkadot.
- **Expected Outcomes:** Restoring user assets locked due to the misconfiguration, ensuring correct fund transfers.

#79 [Proposal: 79] Return PINK and NCTR from Failed TX