GachaStock

Gacha for the stock market, on Solana. Three ways to play with 10 USDC, all settled between players and never against a house:

• Stock Blind Boxes. Rip a pack of tokenized US stocks. 7.50 of every 10 USDC comes back to you whatever you pull, and every machine plays for one shared jackpot.
• Stock Memes. Anyone can launch a machine on a basket of stocks, with its own coin. Every pull on that machine buys some of the coin for the player who pulled.
• Leverage Box. Open a box, get a random long or short on a live price at 500× to 10,000×, and settle against the other players 45 seconds later.

Every draw comes from MagicBlock VRF. Leverage Box also runs in a MagicBlock Ephemeral Rollup, so each box confirms straight away, with no fee and no wallet prompt.

• Live on devnet: https://gachastock-bice.vercel.app (Leverage Box is at /arena)
• Demo videos: a three-minute film of all three games, recorded in demo mode, and a 90-second captioned run of Leverage Box and a gacha pull against devnet. They are not kept in this repository; Demo videos explains how to record them.
• Built for MagicBlock Solana Blitz v9. Devnet only, unaudited, test USDC.

The games

Stock Blind Boxes

A machine is a gacha machine with a theme and a basket of tokenized stocks (xStocks). A pack costs 10 USDC and opens as soon as MagicBlock VRF answers. Each pull lands on one of seven tiers and one stock from the basket:

Tier	Pack is worth	Odds
N	7.50	78.875%
R	11	17.5%
SR	25	2.25%
SSR	40	1.3%
UR	100	0.05%
Legend	500	0.02%
Jackpot	half the shared prize pool	0.005%

• The floor. 7.50 of every pack is always yours. Everything above it is paid from the prize pool.
• One shared prize pool. Every machine pays into the same pool and plays for it. The jackpot is half the pool and any machine can hit it. It only pays while the pool holds at least 2,000 USDC, so a jackpot is never smaller than 1,000 USDC; below that, a jackpot roll pays the best fixed tier the pool can afford. A fixed tier whose prize would exceed 25% of the pool is downgraded the same way.
• Pity. 60 pulls in a row without SR or better guarantees an SR.
• Turbo. Ten packs with a single random draw.
• Claiming. Take the value as the tokenized stock you pulled (one Jupiter swap) or as USDC. A 1% settlement fee applies. If the VRF callback never arrives, the pack is refunded in full after about 10 minutes.

Where each 10 USDC goes:

	Floor	Prize pool	Coin for the player	Creator	Protocol
Official machine	7.50	2.10	—	—	0.40
Launchpad machine	7.50	1.80	0.30	0.10	0.30

In simulation, players get back 93% of what they pay in prizes on average, and about a quarter of 10-pull sessions end in profit. sim/RESULTS.md has the numbers and how the parameters were chosen.

Stock Memes

The launchpad lets anyone open a machine of their own in one transaction, for a 10 USDC fee:

1. Pick a name, a ticker, the pack art and up to 8 stocks from the whitelist of 11. Everything else comes from a fixed template and can never change.
2. The machine is open for pulls at once and plays for the same shared prize pool as every other machine.
3. Each launchpad machine has a coin. 3% of every pull buys that coin for the player who pulled, delivered with the claim, so the people who play a machine come to own its coin.
4. The coin starts on a bonding curve. Once 5,000 USDC has gone in, it graduates and all of that USDC becomes the coin's trading pool. Coins trade with a 1% fee.
5. The creator earns 1% of every pull on their machine.

The Machines page ranks every machine by volume, with its pulls, coin price, liquidity and how much coin its pulls have bought for players.

The coin rebate creates no value on its own: it moves 3% of what players pay into the coin's market. A player who sells straight away gets about face value back; holders gain only if later players keep playing and hold. Most machine coins will lose money.

Leverage Box

Perpetual futures let you pick a side, so they need market makers or a pool to take the other one. In Leverage Box the side and the leverage come out of the box. The draw leans towards whichever side is lighter, so longs and shorts stay close to balanced on their own and a round can settle purely between its players. A rare high-leverage box takes a bigger share of what the losers lose, which makes it the prize of the box.

A round:

1. Deposit USDC once. The same approval registers a session key that lives in your browser.

2. Open boxes for 5, 10 or 25 USDC each. MagicBlock VRF draws the leverage tier and the side:

   Leverage	500×	1,000×	2,500×	5,000×	10,000×
   Odds	40%	30%	18%	9%	3%

3. Lock. The first box starts a 15-second countdown. The round then locks at the oracle price.

4. Live. For 30 seconds every box shows what it would pay if the round ended now.

5. Settle at the oracle price. A box on the wrong side loses stake × leverage × move, never more than its stake. A box on the right side claims the same amount. The smaller of the two totals changes hands, shared pro rata on each side. Winners pay 10% of their winnings, the only fee. Results are credited automatically.

6. Cash out between rounds; the balance goes back to your wallet.

Leverage is a weight, not a promised multiple: winners can only receive what losers lost. The numbers are large because a round lasts 30 seconds, and prices move a few hundredths of a percent in that time. Arenas exist for SOL, BTC and ETH.

This is the beginning of the README. Read the rest at the original. Read the full README ↗