On the starter's base hook

Build a self-contained per-pool tick extremes recorder.

SwapCounterHook

The smallest useful Uniswap v4 hook.

Build a self-contained observation hook on the starter's base hook: on each swap it appends the pool's current tick and the block number to a fixed-size ring buffer keyed by pool, and exposes read-only views for the most recent entry and for the buffer's contents in order.

Write a self-contained Uniswap v4 hook on the starter's BaseHook that, for each pool, maintains three read-only records: the total number of swaps observed, the number of distinct blocks in which at least one swap was observed, and the block number of the most recent observed swap.

Write a self-contained Uniswap v4 hook on the starter's BaseHook that tracks, for each pool, the highest and the lowest pool tick observed at a swap since the hook was first used by that pool, together with the block number at which each of those extremes was most recently set.

Write a self-contained Uniswap v4 hook on the starter's BaseHook that records, per pool, the pool tick observed at the first swap of each block, and exposes those recorded snapshots through read-only view functions.

Build a passive observer hook for a single pool

On each swap it increments a per-pool swap counter, records the block of the most recent swap, and marks the calling address as first-seen if it has not been seen before, all readable through view getters.

A marketing website for a fictional plumbing company.

A marketing website for a fictional plumbing company.

A Uniswap v4 hook that charges a fixed 5% fee on every swap.

A one-file smoke test of the pipeline.

Make the hook count swaps.

Make the hook count swaps.

Make the hook count swaps.

Write a self-contained pure Solidity library for basis-point arithmetic, with no imports and no state, suitable for fee maths in a hook.