Creating Games

Anyone can create single-spin betting games on top of the Sino betting smart contract. It boils down to creating a web application that, on behalf of the gambler does the following:

• Call the Sino betting contract's placeBet function to place a bet.

• Note down the transaction hash.

• Listen for BetPlaced events emitted by the contract. When one is emitted for that transaction hash, note down the betId value it contains.

• Listen for BetSettled events emitted by the contract. When one is emitted for that betId, note down the following values it contains: isWon, mintToBettor, jackpotAmountWon, updatedBettorTokenBalance.

• Based on the above, play a winning/losing animation to the gambler, show them how much they won, their updated balance, etc.

You can view an HTML/Javascript coding example of the above in the code repository: https://github.com/sinoproject/main/blob/main/webapp_example/index.html

Caveats regarding placeBet

• Before calling it, you must call the Sino betting contract's randomizerCallbackFee function, which tells you how much ETH you should send as part of placeBet to cover the costs of the future bet settling transaction.

• When calling placeBet, you can also specify the agent parameter, basically your own wallet address: you will get sent a SINO token commission if the bet wins.