Uniswap V3.

On V3, each bin is a standard Uniswap V3 position minted through the NonfungiblePositionManager and held by ObolLadderManager.

Ladder manager

0x0EA3…eAED

NonfungiblePositionManager

0x7399…E0D3

Positions per ladder

One NFT per funded bin (empty bins are not minted)

Tokens

ERC-20 only (ETH is wrapped to WETH by the app)

#Opening on V3

1. Canonical pool check

   The manager reads token0, token1 and fee from the pool and requires factory.getPool(token0, token1, fee) == pool. The position manager mints into that canonical pool, so forks and look-alike pools (PancakeSwap, Sushi…) are rejected.

2. Price guard

   slot0().tick must be within [minTick, maxTick].

3. Mint the bins

   For every bin with non-zero liquidity, mint() is called with that bin's token budget. The manager then clears its allowances and refunds what was not used.

#Claiming and closing

collect() pokes each position and returns all fees owed. On close, decreaseLiquidity() returns the principal, collect() returns principal plus fees, and the difference is the fee part the 7.5% applies to. The NFTs are then burned.

#Learn more