# Lucky Round (LURO)

## Introduction to Lucky Round

LURO is a decentralized round-based lottery. Players place bets during an open window, and at round close a single winner is drawn by Chainlink VRF. Larger bets buy a proportionally larger share of the round, increasing the probability of being drawn.

## How the Game Works

* Rounds run for a fixed duration. Two cadences are offered: a fast **5-minute** round and a longer **1-day** round.
* Each bet placed during the round is recorded as a share, sized in proportion to the CELT amount.
* When the round closes, no further bets are accepted. The contract requests a random number from Chainlink VRF and uses it to select a single winning bet.
* The winner receives **95%** of the round's total bet pool, paid out automatically. The remaining 5% funds the bonus pool described below.

## Betting

1. Connect your wallet and ensure you hold a Pass NFT.
2. Pick the timeframe (5-minute or 1-day round).
3. Enter the CELT amount you want to bet.
4. Confirm the transaction. Your bet is now active for the rest of the round.

Recommendations:

* **Bet early** — early bets earn the largest bonus weight (see Bonus below).
* **Bet regularly** — consistent participation across rounds smooths variance.
* **Diversify across rounds** — splitting a budget across multiple rounds is statistically better than committing it all to one.

## Winner Announcement

Once the round window expires, the contract seals the round and requests randomness from Chainlink VRF. The VRF response is verified on-chain, the winning bet is selected, and the 95% prize is transferred to the winner's wallet in the same transaction. The round detail page shows the random value, the winning bet ID, and the payout transaction hash for audit.

## Bonus

A 5% bonus pool is funded from each round and distributed automatically to participants. Bonus weight combines two factors:

* **Bet size** — proportional to the CELT amount of the bet.
* **Bet order** — earlier bets in the round score higher than late entries of the same size.

The bonus is applied automatically at settlement; there is no separate claim step.

## Security and Transparency

The game runs entirely on-chain. Every bet, the VRF request, the VRF response with proof, and the payout transaction are recorded on Polygon and independently verifiable. There is no operator that can adjust the result or delay a payout — once the round closes, settlement is automatic.

## Support

For LURO-specific questions see [Games FAQ](/dexgames/games-guide/games-faq.md).


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