Pause RING LP & approve delisting from Omnipool

[Laki389]

FYI, Hydration opengov referenda with an identical title to the title of this discussion has already been executed.

The already voted referenda prevents Hydration DEX users from putting RING liquidity, what follows is, quote: "with the intention to create a subsequent referendum to stop RING trading in the Omnipool and force-withdrawing all RING LP positions from the Omnipool." end of quote.

You can check the aforementioned referendum and the full text at the following link: https://hydration.subsquare.io/referenda/160

Referendums with identical content have also been executed for: ZTG, INTR and CRU.
https://hydration.subsquare.io/referenda/159
https://hydration.subsquare.io/referenda/161
https://hydration.subsquare.io/referenda/162

[hackfisher]

First time hear the concept of delisting from a Dex, Hydration is more like a CEX with the concept of managing by a DAO/parachain

[jiguantong]

https://github.com/galacticcouncil/hydration-node/blob/master/pallets/omnipool/src/lib.rs#L675

1. Get ominipool nftCollectionId: 1337

2. Check DCDAO nft instance ID: 11630

3. Get ominipool positions of NFT 11630

{
  assetId: 31
  amount: 25,000,008,902,947,951,318,272,323
  shares: 25,000,008,902,947,951,318,272,323
  price: [
    96,646,836
    1,000,000,000,000,000,000
  ]
}

4. RemoveLiquidtyWithLimit, Note that amount refers to the shares amount, minLimit refers to the RING amount

[jiguantong]

Error stack

1. on_liquidity_changed
2. config
3. ensure_remove_liquidity_limit
4. ensure_and_update_remove_liquidity_limit
5. allowed_remove_liquidity_limit_per_asset
6. check_limit
7. MaxLiquidityLimitPerBlockReached

Calculate self.limit

1. load_asset_state

# 7L53bUTBbfuj14UpdCNPwmgzzHSsrsTWBHX5pys32mVWM3C1
{
  free: 29,079,999,014,804,245,722,038,067
  reserved: 0
  frozen: 0
}

3. ensure_remove_liquidity_limit
4. calculate_and_store_liquidity_limits
5. remove_liquidity_limit_per_asset
6. Read LiquidityRemoveLimitPerAsset

8. calculate_limit

29079999014804245722038067*500/10000 = 1453999950740212286101903.35 ≈ 1453999 RING
amount: 1453999000000000000000000

[hackfisher]

The liquidity have been removed and send back to Treasury account on Darwinia:

https://explorer.darwinia.network/tx/0x11807f79b6e4c379436bf3a5f8efae078d016719814a55f39059f37a918908d0

https://explorer.darwinia.network/tx/0x94c1a3f3ec5dabaa9c7a9c2a494e473abc279f6a35894864fd8157c3b2a6ec43

Ref:
https://github.com/orgs/ringdao-community-guild/discussions/128#discussioncomment-9745470
https://hydration.subscan.io/extrinsic/8959995-3?page_size=25&page=1
https://hydration.subscan.io/extrinsic/8959928-3?page_size=25&page=1

Thanks to the signers of these multisig.