List a card. Pick a ticket count. Hatch a winner.

A lottois a pool of tickets for one card. The seller sets a ticket count (10–1000) and a pricing multiple, which determines the ticket price. Buyers purchase tickets; once the lotto is full or its timer expires, a single winning ticket is selected by a provably-fair commit-reveal draw. The winner receives the card (shipped by mail for physical, or transferred on-chain for NFT); the seller receives the net proceeds.

Gojo runs the marketplace, holds funds in escrow between sale and delivery, and mediates refunds if something goes wrong. We never hold physical cards ourselves — sellers ship directly to winners.

The Card Valueshown on a lotto page is the card's current TCG market price, sourced from JustTCG for supported games (Pokemon, Magic, Yu-Gi-Oh, One Piece, Lorcana). The timestamp under the price (“9h ago”) shows how fresh that number is.

We snapshot the price when the seller picks the card at lotto creation, then a background job refreshes every live lotto hourly so watchers always see a recent quote. For NFT lottos and any physical card that doesn't match a TCG listing, the Card Value falls back to the seller-declared market value.

Every lotto uses a commit-reveal scheme so no party — including Gojo — can manipulate the outcome after tickets start selling.

1. At creation, the server generates a random server_seed and publishes its SHA-256 hash. The raw seed is sealed until the draw.
2. The client_seed is deterministically derived from every sold ticket (entry number + buyer wallet), sorted and hashed — so the buyers themselves contribute entropy.
3. Winner index = HMAC-SHA256(server_seed, client_seed || lotto_id) mod sold_ticket_count.
4. After the draw, the raw server_seed and client_seed are revealed on the lotto's /verify page. Anyone can re-run the math and confirm the pre-committed hash matches.

1. 1

   Create an account

   Sign in with email or Google on the home page. No wallet required for physical lottos. Add a saved card and default shipping address on /settings/shipping so wins confirm faster.
2. 2

   Browse and pick a lotto

   Lottos are listed at /. If a lotto is community-gated, the seller will share a password — enter it on the lotto page to unlock purchasing.
3. 3

   Buy tickets

   Pick one or more entry numbers on the grid and check out via Stripe. Every $1 earns 15 gems. Funds are held in escrow pending the draw.
4. 4

   Wait for the draw

   For timed lottos, the draw runs automatically at the end time. For unlimited lottos, it runs the moment the last ticket sells. Both use the fair-draw math above.
5. 5

   If you win: confirm your address

   A reminder banner will show on every page, plus a card on /settings/wallet and a prompt on the lotto detail page. You have 30 days to confirm a shipping address; otherwise the lotto auto-refunds all buyers.
6. 6

   Receive the card

   The seller ships and submits tracking. A 14-day dispute window starts at shipment. If the card arrives broken, mis-described, or never shows up, contact support before the window closes.
7. 7

   If the lotto is canceled or disputed

   Gojo refunds the full ticket price back to your original payment method via Stripe. Gems earned on refunded tickets are reversed.

1. 1

   Set up your seller profile

   At /settings/seller: brand name, ship-from address, default carrier.
2. 2

   Complete Stripe Connect onboarding

   Required before we can release funds to you. Gojo uses Stripe Connect so payouts land in your own Stripe account; Gojo only holds funds in escrow.
3. 3

   Create a lotto

   /create collects card title, set, rarity, 1–4 photos (uploaded to secure per-user storage), market value, ticket count, and pricing multiple. Optional community password gates entry to your Discord/FB group.
4. 4

   Tickets sell; draw runs

   You can watch tickets sell in real time on the lotto page. The draw runs automatically on sellout or timer expiry.
5. 5

   Wait for the winner to confirm their address

   The winner has 30 days. You'll see their shipping address on /settings/wallet once they confirm. A "Copy address" button is provided. Until then, shipment submission is disabled and an ETA is shown for the auto-refund.
6. 6

   Ship and enter tracking

   On Pending shipments, paste the tracking number and pick the carrier. This starts the 14-day buyer dispute window.
7. 7

   Get paid

   When the dispute window closes without issues, an automated cron releases your net proceeds (gross sales minus the 2.5% platform fee) to your Stripe Connect account. Withdrawals to bank follow your Stripe payout schedule.
8. 8

   If the win is abandoned

   If the winner doesn't confirm within 30 days, all tickets auto-refund and the lotto is canceled. You aren't out any cards, but you're also not paid — nobody received the card.

EV multiple

Pricing multiple over the seller-declared market value. 0.8×–1.5× range, default 1.25×. Drives the gross sales target.

Gross sales target

Market value × EV multiple. What buyers collectively pay if the lotto sells out.

Seller net

Gross sales minus the 2.5% platform fee. What the seller receives on success.

Gems

Loyalty points earned on every ticket purchase. 15 per USD. Redeem paths TBD.

Escrow

Funds held by Gojo between purchase and either seller payout (after delivery) or buyer refund (on cancel).

Commit-reveal

A fairness technique where the server commits to a secret before the game starts and reveals it afterwards, so outcomes can be verified but not manipulated.

Anything weird, unfair, or broken — reach out before acting on it yourself. Gojo support can refund, re-run a settlement, or adjust a transfer if something went wrong. Include the lotto URL and a short description.