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How burns work

The burn engine

A worker runs every minute, around the clock. It claims each coin's fees, buys what the coin burns, and burns it, all from one public treasury wallet.

Every minute

  1. Claim each coin’s creator fees from pump.fun to the treasury.
  2. Split them: the burn share and the $SYMBIO share.
  3. Buy each target on the market.
  4. Burn exactly the tokens those buys delivered, and write a receipt.

Each coin’s page has a live meter of its fees: waiting on pump.fun, claimed and queued, and burned.

Claiming

Fees are claimed once at least 0.001 SOL is waiting. Anything smaller stays in the coin’s vault on pump.fun (it can’t go anywhere else) and is claimed as soon as it adds up.

Buying

  • Straight from pump.fun: on the coin’s bonding curve, or its PumpSwap pool once it has graduated. Each buy is simulated before it’s sent, with 1.5% slippage allowed.
  • Through Jupiter for anything else, or if the direct buy won’t simulate. A Jupiter buy that would move the price more than 5% is refused and tried again the next minute.

Burning

The treasury burns exactly what the buy delivered, with the token program’s own burn instruction, so the coin’s total supply goes down. Tokens that reach the treasury any other way are never counted or burned in a coin’s name. Then the empty token account is closed and its rent returned.

Minimums and caps

  • The smallest buy is 0.001 SOL (0.001 SOL for $SYMBIO). Smaller shares wait until they add up.
  • A coin on its bonding curve is bought up to 0.5 SOL at a time. The curve prices against about 30 SOL of virtual reserves, so that moves it under 2%.
  • Any other market is bought at most 2% of its liquidity per buy (never less than the smallest buy). A thin market is bought in small pieces, a minute apart.

When something fails

  • A failed buy keeps its money in the coin’s queue, and the next minute tries again.
  • Every transaction is written down before it’s sent. After a crash or restart the engine checks the chain first, so nothing is ever bought or burned twice.
  • A host that fails 30 times in a row rests for an hour, and its share burns the coin itself meanwhile. It’s then tried again.
  • If the engine stops, fees wait safely in each coin’s pump.fun vault and are claimed when it restarts.
The treasury keeps at least 0.3 SOL of its own for network fees, so claims and burns never stall for lack of gas.