How it works.

Click Sign in in the header and pick Base Account at the top of the list. Your phone or laptop creates a passkey — the same kind you might use to sign into a banking app — and that passkey becomes your Tifo account. You don't write down a seed phrase. You don't install a browser extension.

Already have a wallet (MetaMask, Rabby, Coinbase Wallet, Rainbow)? It's on the same list — pick yours instead.

Packs cost a fixed amount of USDC — a digital dollar that lives on the Base network. One USDC is always worth one US dollar.

Click + Add funds in the header and you'll be handed off to Coinbase Onramp. Pay with a debit card or your existing Coinbase account — either way, USDC lands in your wallet a few minutes later.

Coinbase is a third-party provider — Tifo doesn't see your card or bank details.

Head to the store. Pick the part of the tournament you want cards from (group stage, knockouts, finals), an art style, and a tier:

• Standard — the cheapest tier. Every card rolls the base 90 / 8 / 2 % chance for regular / silver / gold.
• Premium — at least a third of the cards in the pack are guaranteed silver.
• Gold — at least a third are guaranteed gold.

Click Buy & open. Your wallet asks you to sign once — that's the permission to spend USDC plus the purchase, in a single step. The cards arrive a few seconds later (a randomness oracle is rolling the contents in the background).

Open your collection. Each match in the tournament has one card you've chosen as your pick — that's the card whose score counts for you when the match plays out. You can switch your pick anytime up until the match locks (kickoff).

Picks are free. The only cost was the pack.

When a match finishes, every card with the matching outcome scores. Silver cards score more than regular, gold cards score more than silver. Your total across the tournament puts you on the leaderboard.

A share of every pack sale goes into a tournament prize pool. After the final, the top of the leaderboard splits that pool — claim links appear on the claim page when payouts are ready.

Why does my wallet ask me to "sign"? Signing proves you authorise an action without sending any money. The first signature in a buy is a permit — it lets the Tifo contract pull the exact amount of USDC for this purchase, no more.

Do I need ETH for gas? If you signed in with Base Account, no — gas is sponsored on supported flows. If you connected a different wallet, you'll need a tiny amount of ETH on Base (usually fractions of a cent per transaction).

Can I sell my cards? Yes. Open any card in your collection and use List this card to set a USDC price, or accept a buyer's offer if one is open. Cards are ERC-1155 NFTs on Base, so they also work on third-party marketplaces.

What if I lose my passkey? Base Account supports passkey recovery via your Apple / Google account sync. Set that up in the same settings panel where you manage your other passkeys.