A coin launched here charges 3% on its own trades and spends it on one thing: buying itself back. What decides the moment is a callout on pump.fun, published somewhere neither we nor the creator can reach.
3% comes off every buy and every sell, the most pump.fun lets a creator charge and the same on every coin here. It lands in a wallet only this coin can draw on, because that wallet is the coin's creator on chain.
Somebody posts a callout on the coin's page on pump.fun. The engine reads the feed, sees a callout it has not answered, and goes: past the cooldown, without waiting on the clock.
The budget goes in as a market buy, clipped so it cannot move the price past the engine's cap, and what it buys is destroyed in the same pass.
The keeper is the only moving part. Every pass it walks the same four steps for every coin, and every step is a transaction somebody can go and look at.
The budget. A snowball can only ever spend fees the coin has already earned, so a hundred callouts on a coin nobody trades buy exactly as much as one does: nothing. Posting harder does not create money, it only spends what trading produced, sooner. The impact cap bounds each run at 2% of the venue's reserve on top of that.
Because we cannot write one. If the trigger lived on this site, a creator with an account, or us with a database, could manufacture it and the whole mechanism would be theatre. The event that moves the coin is published on a platform we do not own by people who do not work for us.
It still buys. A 20m clock runs underneath the trigger, so a coin earning fees in silence deploys them on schedule rather than hoarding them. The callout is what pulls a buy forward; the clock is what guarantees one.
No. The fee rate and its recipient are written into the coin's bonding curve at creation, in the same transaction that creates it. The recipient is a wallet derived for that coin alone, and the person who launched it never holds its key.
We run the keeper, so we can stop it running. If we did, the fees would sit in each coin's vault untouched, because that is the only wallet pump.fun can pay them to. What we cannot do is redirect them or spend one coin's fees on another.
No, and anybody telling you otherwise is selling something. A coin can only spend what it earned in fees. On a quiet coin that is a small number, and a small buy into a falling market is a small buy into a falling market. What the mechanism changes is who ends up holding the supply, and when the buying happens.
Every gate, weight and figure the engine uses is published, along with the reasoning for each one.
PUMPBALL