Docs

Latch is one contract on Robinhood Chain that holds locks nobody can release early. It has no owner, no admin function, no fee and no upgrade.

Token locks

lockTokens(token, amount, beneficiary, cliff, end, note) pulls the tokens in (approve first). Fee-on-transfer tokens are recorded at the amount that actually arrived.
Nothing is claimable before cliff. After it, the vested amount grows in a straight line from the lock's start to end; at end everything is claimable. cliff == end makes a plain time lock.
Only the beneficiary can call claim(id), as often as they like. The creator of the lock cannot take anything back.
Locks are limited to ten years.

lockNft(nft, tokenId, unlockAt, note) holds any NFT until unlockAt (approve it first). NFTs sent to Latch any other way are refused, so nothing can get stuck.
For Uniswap v3 positions (position manager 0x7399…E0D3) the owner can call collectFees(id) at any time: the trading fees go to the owner and the liquidity stays locked.
extend(id, later) moves the unlock date later, never earlier. transferLock(id, to) hands the lock to another address.
After the unlock date the owner calls withdrawNft(id) to get the position back.

Every lock is stored in the contract: tokenLock(id), nftLock(id), locksOfToken(token), tokenLocksOf(account), nftLocksOf(account), recentTokenLocks(n).
The public page for a token is latchlock.xyz/?t=<token address>.

A lock really cannot be cancelled. Check the amount, beneficiary and dates before you confirm.
Locked LP still carries price risk: the position stays in the pool and moves with it.
Unaudited. Tested on a fork of Robinhood Chain with real USDG, WETH and a real Uniswap v3 position.

Latch	deploys at launch
Uniswap v3 positions	0x7399…E0D3