The engine is a keeper that owns one wallet per coin. Each wallet is the coin's on-chain creator, so Pump.fun pays it the coin's creator fees and nothing else. Every minute the keeper turns those fees into permanent pool depth.

Claim

Once a coin's vaults hold at least 0.005 SOL of fees.

Rebalance

Buys the coin with just enough SOL to make both sides equal in value at the pool price.

Deposit

Adds both sides to the canonical PumpSwap pool, sized to whichever side runs out first. Leftovers roll into the next round.

Burn

Burns exactly the LP tokens the deposit minted, in the same transaction. Nobody can withdraw it.

Reserve

Each engine wallet keeps 0.01 SOL for its own network fees and account rent.

Cadence

The keeper visits every coin once a minute, oldest first.