Place a Parlay

The on-chain path works with one published live vault/card at a time. The card's legs are fixed; the current app does not build an arbitrary cross-vault parlay.

Transaction order

1. Sign in and create an account. Continue with Google or Apple to create or recover a non-custodial Reown smart account, or choose an existing wallet. Complete the one-click wallet challenge and choose an available permanent username. Browsing remains public, but quotes require an authenticated account.
2. Choose one published vault and review every fixed leg. Confirm each selected outcome, the current multiplier, and the vault address.
3. Review stake, capacity, and deadline. Enter a USDC stake no larger than the displayed remaining capacity while the vault is still Open and before its deposit deadline.
4. Fund if needed. An underfunded account can open Reown's Meld onramp or receive native Polygon USDC. Polypar preserves the slip for 24 hours, detects arriving funds, and asks the user to review the refreshed multiplier before continuing.
5. Request a fresh quote and confirm. Smart accounts atomically batch the native-USDC approvals and depositWithQuote, paying their own Polygon fee in USDC. External wallets retain their normal sequential approval and POL-gas flow.
6. Submit the deposit. The candidate address comes from the authenticated quote response after username resolution, never directly from browser storage.
7. Track the share-backed ticket. After the Polygon transaction confirms and indexing catches up, use My Tickets to follow the vault status and redeemable shares.

The backend signature cannot submit either wallet transaction. The account must approve and sign each transaction itself.

If placement fails

State	What happened	What to do
Multiplier moved	The fresh multiplier fell below the value the user accepted	Review the new terms and request another quote only if acceptable
Quote expired or nonce used	The 30-second window elapsed or that single-use nonce already reached the vault	Request a fresh quote and resubmit
Quote unavailable	Gamma pricing, the signer, database, or quote service could not produce a valid signature	Wait for the dependency to recover; do not submit stale fields
Vault closed	Its status changed or the deposit deadline passed	Choose another published Open vault
Capacity full	The stake exceeds remaining capacity	Reduce the stake if capacity remains, or choose another vault
Wallet rejected	The user declined approval or deposit	No transaction occurs; restart only when ready
RPC or transaction failure	Polygon RPC, simulation, broadcast, or confirmation failed	Check network status and transaction history before retrying to avoid confusion
Insufficient funds	The account lacks enough native USDC for the stake and network-fee reserve	Resume the saved Deposit flow
USDC fee payment unavailable	The token paymaster is disabled or temporarily unavailable	Retry later; Polypar will not unexpectedly request POL from embedded users

A moved or expired quote does not move wallet funds. A mined approval only creates allowance; the vault receives USDC only when a valid depositWithQuote executes.

The paying wallet's first successful wager permanently locks its referral choice, including a wager made without a referral. A failed or reverted wager does not lock anything. Later referral links cannot replace that on-chain choice.

Demo cards are not tickets

Fixture/sample slips and mixed-vault selections can keep a prototype interface interactive, but they do not call a valid on-chain parlay vault. A celebratory demo message is not a transaction receipt, vault share balance, or bet.

Next: understand the remaining latency dependencies in Instant Liquidity, then learn the post-event path in Resolve & Redeem.