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A launch distributes its token as a loot box: pay a fixed ETH price to spin, win a random bag of the token from a set of prize tiers.

The bags are infinite — no tier is ever “used up”. Deliberate: with a capped jackpot, once someone wins it, the big prize is gone and everyone after is disincentivized. Here the jackpot keeps its probability on every spin, so the incentive never decays.

Each tier has a fixed weight; the probability of drawing it is weight ÷ total weight. Because no tier depletes, the odds are identical on spin #1 and spin #1000 — they never drift, and the jackpot is never saved for last. Weights can be set directly, or derived: HARMONIC (∝ 1/amount — small bags common, jackpot rare) or UNIFORM.

Because bags are infinite, there is no fixed supply: the token is minted on demand and total supply emerges from participation — total supply = distributed ÷ sale%.

The creator sets tokenomics as percentages (not fixed amounts): sale / team / holders / LP, summing to 100%. Spinners mint their winnings when they claim (after graduation); at graduation the team / holders / LP buckets are minted in proportion to what the crowd won, so the ratios always hold.

The holders slice (creator’s choice, up to 10%, capped on-chain) is minted straight into the Holder Vault at graduation — it accrues for $GACHA stakers, so every token launched here pays a tithe to the people holding the protocol token.

Every spin costs a fixed ETH price, split three ways — LP / creator / protocol — as percentages set by the creator. The protocol share is a mandatory 5% (GachaPad’s fee, the platform’s business model); it is enforced on-chain by the factory and cannot be lowered or removed. The creator sets LP + creator = 95%.

A launch graduates when the LP raise hits its ETH cap or a deadline passes — whichever comes first. The cap is hard: spins that would overshoot it are refused. Graduation is automatic — it fires inside the very VRF callback that fills the cap (and a permissionless trigger remains as fallback), so a launch always resolves and can never be stuck. Until then bags are locked and the token is non-transferable — nobody can dump pre-launch.

At graduation the LP bucket + raised ETH seed a Uniswap v4 pool (1% fee) — the single official venue for the token. The LP positions land in the fee vault, where they are locked forever: the vault has no withdraw function, so the liquidity can never be pulled. Permanent and rug-proof by construction.

The implied fully-diluted valuation is anchored purely by demand and the sale size: FDV = total ETH spent ÷ sale%. It doesn’t depend on how many tokens get minted — a smaller sale% means a scarcer distribution and a higher FDV. The pool opens around the average price the crowd paid, so participants are neither underwater nor handed a free multiple at listing.

Draws use Chainlink VRF: a spin requests a random word, VRF fulfills it in a later block, and the callback settles the draw — so nobody, not even the creator, can predict or rig it. Spinners pay a small VRF surcharge per pull that funds the randomness subscription. If a request isn’t fulfilled by its block deadline, the spin is refundable. (Locally a mock provider stands in with the same interface.)

• Provably fair: Chainlink VRF — unpredictable and unriggable, including by the creator.
• No snipe: constant odds every spin, jackpot never saved for last, identical expected value.
• No pre-dump: bags locked (mint only on claim, after graduation), token non-transferable until then.
• No rug: the LP is locked forever in the fee vault at graduation — liquidity is permanent, only the fees move.
• Always resolves: graduation fires automatically on cap or deadline (permissionless fallback).
• Fixed protocol fee: the 5% cut is enforced on-chain and can’t be altered per launch.