New bounty: The most resourceful thread on @uniswap V4 Pools

I'm pretty excited about Uniswap's architecture and hooks, which enable unprecedented customizability for liquidity pools. I'm looking for a comprehensive thread (a reply to this post) that dives deep into the following aspects of Uniswap V4 hooks:

Existing Hooks:
- Which hooks are currently available to try? what use cases do they solve? please only share hooks that are verified

Potential Hooks & Innovation:
- what creative ideas could leverage V4's hook system?
- what interesting applications could integrate with Farcaster?

Reward: 20 USDC
Only high-quality replies will be rewarded, judged solely by me

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3. Whitelisted Pools 
   - Use Case: Restricts pool access to KYC/whitelisted addresses (e.g., compliant institutions).  
   - Mechanism: A `beforeSwap` hook checks the trader’s address against a permission list. 

4. Limit Orders
   - Use Case: Enables traditional limit order functionality on AMMs.  
   - Execution: A hook triggers a swap only when the price hits a predefined threshold.
 
5. LP Fee Rebates  
   - Use Case: Rewards LPs with fee discounts or rebates based on loyalty (e.g., long-term stakers).  
   - Implementation: Uses `afterSwap` hooks to distribute rebates programmatically.

Address Verification Status
To link Ethereum addresses to Farcaster accounts (e.g., for Sybil resistance or token-gated actions):  

Verification Workflow
1. User Generates Proof:  
   - Sign a message (e.g., `I am @username on Farcaster, timestamp: 1234`) with their Ethereum wallet.  
2. Store Proof:  
   - Publish the signature to Farcaster (e.g., as a cast or via Farcaster’s API).  
3. Verification Contract:  
   - Deploy a hook-compatible smart contract that checks:  
     ```solidity
     function verify(address user, bytes memory signature, string memory username) public view returns (bool) {
       bytes32 messageHash = keccak256(abi.encodePacked(username, nonce));
       return SignatureChecker.isValidSignatureNow(user, messageHash, signature);
     }
     ```  
4. Status Check:  
   - Use Farcaster’s API to check if the user’s profile contains a valid signature for their Ethereum address.

Thanks for your technical insights on Uniswap V4 hooks! Could you please share the complete thread and address verification status of hooks and Farcaster integration ideas? This would help meet all bounty requirements.