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# Placing bets

Once you're connected to Devils Wheel roulette app, you'll be able to make bets.
The user interface is very simple; it consists of three parts:

  1. A bet history showing the lastest bets from everyone and your previous bets.
  2. A bet placing area with an interactive roulette layout to place bets. It also contains a "Possible outcomes" tab with the expected gain/loss for each possible result.
  3. A bet list with all the bets you've placed for the next game to be played.

# Types of bets

As of any european roulette, you have multiple bet types.

  • By Number (x36 if you win)
  • By Dozen (x3 if you win)
  • By Column (x3 if you win)
  • By Half (x2 if you win)
  • By Color (x2 if you win)
  • By Parity (Even/Odd) (x2 if you win)
  • By Color, Half, or Parity and receiving a bet outcome of ZERO(0) (receive 1/2 wager back on loss)

You can select a single wager or any combination of these wagers before spinning. There is a maximum allowed wager, depending on how much DAI is currently pooled in the contract.

Select you desired bet by clicking on the layout. A popup will show up where you can input how much you want to bet and check how much you can earn.

# Checking your bets

After you have placed your bets, they will appear on the left side. There you can see the details, the total amount and the maximum you can win.

If you click on the Possible outcomes tab, you can check how much you'd earn for each possible result.

# Playing your bets

To spin your currently placed bets, you can click on the Place Bets button and it will present a popup with the final amount you have to pay: this includes all the bets, plus a small fee for the random number generation.

The gas costs for a complete round of play is approximately 0.02 - 0.03 MATIC, which is less than $0.05 USD at the time of writing.

# Approve and roll

There are two buttons for rolling your bets: Approve amount and Play Bets!.

Approve amount will ask for a wallet signature that allows the roulette to spend your DAI tokens.

Play Bets! will send the roll request to the roulette's contract.

Each of these transactions cost approximately 0.01 MATIC tokens in gas fees.

# Spin queue

After sending a wager, you'll see a roulette animation which means that the wager was sent and it's waiting for the random number to arrive. It can take several seconds and usually under 45 seconds to return the result.

Nothing will happen if you close or refresh the page. Independenly of what you do, when the spin is finished, you will have a popup with the result number and how much earned or lost. In case you win some DAI, the funds will automatically be sent to your wallet.

If there is any problem with the return of the random number from Chainlink, our contract will automatically detect that error and return the wager after 2 hours has passed.