Supernova bounty

Every coin carries a bounty. When the coin graduates, the bounty is split between the wallets that bought its final stretch and still held shortly after graduation.

Where the bounty comes from

Every trade on the curve pays a 1% fee. After Meteora's share and the creator's share, the rest is Corium's. Half of Corium's share on a coin is that coin's bounty, for the coin's whole life on the curve, from its first trade to graduation. That comes to about 0.25% of all curve volume.

The split is enforced by the Corium program: every time Corium's fees are claimed from a coin's pool, half goes straight into that coin's escrow, in the same transaction. Nobody holds bounty money in a wallet. How the fee router works →

The bounty shown on a coin page is the escrow so far, plus half of the fees still waiting in the pool.

The final stretch

The final stretch is the last 10% of the curve: from 76.5 SOL to 85 SOL. The coin's star turns critical when it enters.

Scoring

Each wallet's score is its net SOL into the final stretch:

• A buy earns credit for the SOL it put in above the stretch line. A buy that starts at 70 SOL and ends at 80 SOL earns credit for the part from 76.5 to 80 SOL only.
• A sell made while the curve is in the stretch takes its SOL back out of the seller's credit. Sell as much as you bought and your credit is gone.
• Whose trade it is: each trade counts for the wallet whose balance of the coin changes in that transaction (the wallet that receives the tokens on a buy, the one that gives them up on a sell), not for whoever paid the network fee. So a buy made through a trading bot, an aggregator or a Jupiter limit order counts for you, just like a buy on corium.so. The curve's and the pool's own vaults are never counted.
• Limit orders on corium.so run on Jupiter's trigger orders, which fill inside your own Jupiter vault and then send the tokens to your wallet. A fill by your vault counts as yours: Jupiter reports which vault belongs to which wallet, the list is public (/api/orders/vaults on the Corium API), and every payout's published scores include the pairs it used.
• Credit is linear in SOL, so splitting a buy across several wallets gains nothing.

The hold check

Each scoring wallet's balance of the coin is taken as of exactly 10 minutes after graduation, rebuilt from on-chain history, so it doesn't matter when the payout is actually computed. Selling or moving tokens after that moment never affects your bounty. Your credit is scaled by the share of your stretch tokens you still hold:

score = stretch credit × min(1, tokens held ÷ stretch tokens bought)

Hold everything and you keep your full credit. Sell or move half and you keep half. Dump everything at graduation and you score nothing.

The payout

The escrow is split pro rata by score, in lamports, rounded down. The few lamports of rounding go to the top score, so the payout adds up to exactly the escrow; the program refuses anything else.

The scores, each wallet's amount and its merkle proof are published to IPFS with every payout, and the scoring code is public. Anyone can recompute a payout from chain data and check it against what was posted. Verifying a payout →

Claiming

Your bounty shows on your profile’s Bounties tab and on the coin page. It is settling until the payout is posted, shortly after the 10-minute hold check, then Claim sends it to your wallet.

Claim window	30 days from the payout
After the window	Whatever nobody claimed goes to the Corium treasury. Anyone can trigger that.
Nobody held	If no wallet scores, no payout is posted. 30 days after graduation, anyone can release the escrow to the treasury.

Coins that never graduate

A coin's escrow stays in the program until the coin graduates. A coin that collapses into a black hole keeps its escrow: if one buy revives it and it later graduates, its bounty is still there.

What stays off chain

The program enforces where the money is, how much a payout is, and that it can only be posted after graduation. Who wins is scored off chain by the Corium crank. That scoring is public and checkable, and the crank can only split a coin's escrow between wallets; it cannot take any of it.