FFFlip

FFFlip is a coin flip game at ffflip.famousfoxes.com. You pick heads or tails and a stake. If the coin lands on your side, you get double your stake back. If not, you lose the stake.

Every flip is settled on Solana by the FFFlip program. The result comes from a public randomness beacon called drand, and the program checks the beacon's signature before it uses it. See Provably fair flips for how this works and how to check a flip yourself.

Before you start

• You need a Solana wallet with SOL, or with one of the supported tokens.
• You must confirm that gambling is allowed where you live and that you are at least 18. The site asks for this the first time you visit.

How to flip

1. Go to ffflip.famousfoxes.com and connect your wallet.
2. Choose a token. The list shows the supported tokens you hold.
3. Choose your stake.
   • SOL and BONK use fixed amounts. Click one of the buttons.
   • For SOL you can switch to 2X mode, which doubles each button (0.2 up to 10 SOL).
   • Other tokens let you type an amount, or pick 25%, 50%, 75% or MAX of what you can bet.
4. Click FLIP HEADS or FLIP TAILS and approve the transaction in your wallet.
5. Wait a few seconds. The site shows a countdown to the drand round your bet is locked to, then the result.
6. If you win, the payout goes to your wallet automatically. You don't need to claim it.

Under the result you see "Paid to your wallet" (a win) or "Settled on chain" (a loss) with a link to the transaction on Solscan.

The first time you flip, your wallet also creates a small bet account for you. FFFlip reuses that account for every flip.

Odds and payout

• Heads and tails each have a 50% chance.
• A win pays 2x your stake: your stake back plus the same amount again.
• A loss pays nothing.

Fees

FFFlip charges a fee of 3% of your stake on every flip, win or lose. The fee is added on top of your stake. For example, a 1 SOL flip costs 1.03 SOL. If you win, you get 2 SOL back. If you lose, you get nothing back.

Because of the fee, the balance the site shows you is a little lower than your real wallet balance.

The stake goes to the FFFlip treasury, which pays out wins. The fee goes to a separate FFF fee wallet. See Addresses.

Limits

Each token has a minimum and a maximum stake. See Tokens and limits for the full list. For SOL:

Mode	Stakes you can pick (SOL)
Normal	0.1, 0.25, 0.5, 1, 2, 3, 4, 5
2X mode	0.2, 0.5, 1, 2, 4, 6, 8, 10

You can have one flip in progress at a time. If your last flip is still settling, the site waits for it (you see "Getting bet ready... Settling your last flip") before it asks you to sign the next one.

The treasury must be able to pay a win before it accepts a bet. If a stake is too large for the treasury at that moment, the bet fails with "This bet is too large for the treasury right now. Please try a smaller amount." When a bet fails, your stake and fee stay in your wallet. You only pay the normal Solana network fee for the failed transaction.

Pauses, halts and refunds

FFFlip has two ways to stop new flips.

Short pause. FFFlip watches the Solana clock. If the chain clock falls too far behind real time, or the network stalls, new bets pause on their own until things are normal again. This keeps the drand round of every bet in the future. You see "New flips are paused for a moment. Please try again shortly." Flips that were already placed still settle and pay out as normal.

Halt. The team can halt FFFlip in an emergency. You see "Flipping is paused right now. Please try again later." While FFFlip is halted, no new bets are accepted and placed bets are not flipped. Wins that were already flipped still get paid.

Refunds. If a placed bet can't be settled, for example because its drand round is never published, the team can refund it. A refund returns your stake to your wallet. The 3% fee is not refunded. If you think you have a stuck bet, ask in the Famous Fox Discord.

Stats and profiles

• Home page feed. The home page shows a live feed of recent flips.
• Stats (/stats). Heads/tails and win/loss splits over the last 100 flips, the top 5 winning and losing streaks, and per-token flip counts and volume.
• Profile (/profile). Your heads/tails and win/loss charts, top win and lose streaks, luckiest and unluckiest token, profit and loss by token, and your recent flips. You can open anyone's profile at /profile/<wallet address>.
• Flip History (in the menu). Recent flips from everyone, or only yours.

Your name, avatar and X account on FFFlip come from your Famous Fox profile. To change them, or to link X, edit your profile on famousfoxes.com/profile.

Self-exclusion

If you want to block your wallet from FFFlip, contact the team on the Famous Fox Discord. A blocked wallet can't place bets with SOL or any token.

Getting your token listed

Projects can ask for their token to be added with the form linked in the FFFlip FAQ.

Addresses

What	Address
FFFlip program	72D3En8GQycjtunxf9mgyR8onzYdPqYFsKp4myUzhaRZ
Treasury (pays wins)	ByjcyGru3RTeAheTjoFJi7mL8knNmzHz1twuoqjbjRtF
Fee wallet (receives the 3% fee)	Fz2tay9wmAhaz1GuEETorL55LBMECaT85DX9Tj5zqQKb
Flip settings (pause, halt and round offset)	6WkDjiL114ycvJAfZdZmMvtFSPVbfaBCH4EpmYmJRRqr