How Clash Sport Works
Call the next 60 seconds of a live game's win probability UP or DOWN. Get paid on the size of the move — up to 33x, less a 2% fee on the profit. Flat or wrong way, the house LP takes it and you mint CLASH.
The basics
Every live Polymarket sport and esport is playable — football, basketball, tennis, cricket, American football, hockey, UFC, CS2, League, Valorant, Dota and more. Each game has a live win probability (0–100%) for one side, taken from the real order book.
You call where that number goes over the next minute: UP (it rises) or DOWN (it falls). You play against a shared house LP, not another player — so there's always someone on the other side, instantly. Esports games show the live stream next to the chart.
Your account
Bets are in USDG. Deposit once into your in-app vault balance and every bet is a single tap from there. Withdraw any time — withdrawals can never be paused.
- Minimum deposit and withdrawal: 10 USDG (withdrawing your entire balance is always allowed).
- Bets from 1 USDG; the max per bet depends on what the house can currently cover.
- On testnet, the account page has a faucet: 1,000 test USDG per day.
The 60-second round
1. Quote. When you tap UP or DOWN, the engine signs a quote for your stake that's valid for 8 seconds. It fixes your round, the market's volatility (σ) and your payout curve. If it expires before your wallet confirms, the app re-quotes automatically.
2. Start. Your round starts on the next 5-second mark at least 30 seconds after you bet (on-chain: between 20 and 45 seconds out), and runs exactly 60 seconds.
3. Boundary prices. The start and end prices are each the lower median of the 1-second “qualified mid” samples from 20 seconds before the boundary to 15 seconds after it (at least 18 of those 35 must be qualified; otherwise the latest qualified price from the minute before is used). A price has to hold for about 18 seconds to set a boundary, so a quick push on the order book can't. The qualified mid is an impact-price mid: each side is priced where a $500 order would fill, so small orders at the top of a thin book can't move your price, and seconds when the book has been suddenly emptied out don't count. It's the same series you see on the chart. Because the median waits for those 15 seconds, the end price is posted about 17 seconds after your round ends.
4. Settle. Move in your direction = win; flat or the wrong way = loss. Each posted price is checked by an independent guardian, which runs its own copy of the order-book feed. It has 5 seconds to void a price that came from the wrong key or doesn't match what it saw; a voided price refunds every bet that uses it. Settlement happens on-chain once that check window has passed, so results land about 25 seconds after your round ends.
Payouts scale with the move
A win pays stake × multiplier (the stake is included), wheremultiplier = clamp(1 + 4 × 2.13 × move ÷ σ, 1.01x, 33x)
minus a 2% fee on the profit. Your stake always comes back in full: $10 at 2x returns $19.80.
σ is set per quote from the market's recent behaviour (calmer markets get a smaller σ, so the same move pays more) and can never go below the market's on-chain floor. Example at σ = 25pt, net of the fee:
The payout curve. The multiplier a winner receives, net of the fee, against how far the win probability moves your way over the round (σ = 25pt here). On a game's page you see the live multiplier of your open bet.
- Any win pays at least 1.01x, scaling with the size of the move — capped at 32.36x from a +93.9pt move.
- Shown net of the 2% fee on winning profit (curve 33x cap before the fee). Your stake always comes back in full.
- No move = house wins. A flat or wrong-way finish loses the stake to the house LP (and mints you CLASH).
- σ 25.0pt (an example; each quote sets its own σ from the market and locks it for your bet)
The house LP (and payout tickets)
The house LP started at $0 and accepts no deposits — it fills only from player losses. Winners always get their stake back immediately.
If the LP doesn't have the cash to pay a win's profit, the unpaid part becomes a ticket in a first-in-first-out queue. Every later loss repays the queue before anything else, and you can claim a ticket from your account as soon as the queue head passes it. House Funds = cash − unpaid tickets, so they can go negative.
When several wins land on the same boundary and the LP can't cover all of them, the wins resolved first are paid in cash and later ones get tickets. Resolution is permissionless; the engine resolves bets in the order they were placed.
Risk limits keep the queue sane: a per-bet max profit (the larger of a floor and a slice of House Funds), per-round caps for each market and direction, a cap on the house's total open exposure, and a throttle to minimum stakes while the queue is long. See it all live on the house LP dashboard.
Refunds & safety
Missing price → refund. If a boundary price isn't posted, anyone can refund the bet 30 seconds after the boundary. A refund returns exactly your stake.
What can't be paused. A guardian can pause new bets and deposits in an emergency, but withdrawals, settlement, refunds, ticket claims and staking exits are never pausable.
On-chain. The vault, game, prices, bets and payouts are Robinhood Chain contracts anyone can read. Quotes are EIP-712 signatures the game contract verifies; the signer holds no funds.
CLASH: fair launch
CLASH supply started at zero — no team or investor allocation. It's minted only to losing bets: 100 CLASH per $1 lost, per loss (not netted against wins).
Once the house's gross equity (gross House Funds on the house LP dashboard) first passes $2M, emission decays: 100 · S² ÷ (S + H)² CLASH per $1, with S = $120M and H the high-water mark of gross equity above $2M.
CLASH is non-transferable at launch — you can stake, unstake and claim. Transfers then open automatically, 14 days after the house's gross equity first reaches $5M. It's a rule in the contracts: the vault records that moment once, a later dip doesn't undo it, and nobody can delay it — the team can only open transfers sooner. The contracts are upgradeable with 24 hours’ public notice, so this rule could change through a scheduled upgrade. (See Contracts & trust.)
What counts toward $5M. Gross equity is LP equity plus cumulative equity allocated to stakers. Donations to the house count toward it. The $5M milestone is an accounting figure, not cash held or revenue.
What the unlock does. Unlocking only permits transfers: it doesn’t create a trading venue, a market price or guaranteed liquidity.
Fees & staking
- 2% of every winning profit, deducted from the winner. Every payout we show you is already net of it.
- 2% of every loss, carved out of the house's gain — it is not added to your loss. Lose $10 and you lose exactly $10: $9.80 goes to the LP and $0.20 is the fee.
- Every fee splits 50% to CLASH stakers and 50% to the treasury. The team earns exactly 1¢ per $1 of losses or winning profit — nothing from deposits or CLASH emissions.
- Fees are only paid while no winner is queued. While tickets are outstanding, a loss goes entirely to queued winners (then the LP), and a queued win still nets 98% of its profit — the fee just isn't paid out.
- Staking pays USDG the moment bets settle, with no lockup (a stake just can't leave in the block it arrived, which blocks flash loans). Rewards that arrive while nobody is staked go back to the house LP. Stake CLASH.
- Staged split: of the house's net gains, the LP keeps 100% up to $500k, 50% up to $3M and 25% up to $5M; stakers get the rest, and everything past $5M. The LP tops out at $2.25M.
Contracts & trust
- Network
- Robinhood Chain Testnet. An independent app: running on Robinhood Chain does not mean Robinhood endorses, operates or partners with it.
- Custody
- Your balance sits in the vault contract, not a company wallet. Withdrawing your available balance can't be paused; funds in open bets return when they settle.
- Upgrades
- 24-hour public notice before any upgrade can run. Checking for scheduled upgrades… Details
- Prices
- Polymarket's order book, posted on-chain by the oracle key and checked by an independent guardian.
- Audits
- Internal audit 20 Oct 2026 plus three re-audits (20–21 Oct 2026); latest reviewed commit c8310b2. An independent external audit is required before mainnet.
Upgrade status
Checking for scheduled upgrades…
Contracts this app uses
- Vault · balances, house LP, payout ticketsExplorer for the Vault contract (opens in a new tab)
0xd5cD97b3fFD6c7E43FA8f8Be57540242116bCA6b - Game · bets, boundary prices, settlementExplorer for the Game contract (opens in a new tab)
0xed9c49b63956E56C17dA7B8c6e9d0e17c714cFD4 - CLASH token · minted to losing betsExplorer for the CLASH token contract (opens in a new tab)
0x927C09107AA31d9D2F547c15eBCf0b3D00FC8260 - Staking · CLASH staking and USDG rewardsExplorer for the Staking contract (opens in a new tab)
0x4A61Fb28a99a20CBFbEdD3F07dF78cA089Da97EF - Test USDG · testnet token with no real valueExplorer for the Test USDG contract (opens in a new tab)
0x3E26148872B0eDe90a79A8B954Df80105dBbFbF3
In more detail
Upgrades. The vault, game, CLASH token and staking contracts are upgradeable proxies, with a 24-hour upgrade timelock: every upgrade must first be scheduled on-chain, naming the exact new code and the hash of its call data, and can only run 24 hours later (within 7 days). There is no way to skip or shorten the wait, so you always get a day's notice to look at a change. The 24-hour delay is notice, not a guaranteed exit: open bets still need to resolve, unfunded profit tickets still need repaying from later losses, and locked CLASH may not be sellable within the day. Withdrawing your available balance is always possible. An upgrade, once it runs, can change any rule — including the timelock itself. The admin can also change settings (fees, limits, pausing new bets) without a delay, so you are trusting the admin as well as today's code. On mainnet the admin is a Safe (multisig) account.
Prices. Boundary prices come from Polymarket's order book: the engine takes the qualified (impact-price) mid and its oracle key posts each boundary on-chain. An independent guardian runs its own copy of the order-book feed and can void a bad print before settlement; a voided price refunds the bets that use it.
Audits. Internal audit 20 Oct 2026 plus three re-audits (20–21 Oct 2026); latest reviewed commit c8310b2. An independent external audit is required before mainnet. The internal reviews covered the contracts, the backend services, the web app's wallet integration, and the product's UX and accessibility.