How to catch exception or receive the result of transaction

[nhannh-senspark]

Hi, I'm having some trouble and would love to get some help.

My question is after calling GameFi.buy() or buyWithTon(), how do I know what the status and result are so I can proceed? I tried Cancel transaction and got the following error:

Uncaught (in promise) Error: Wallet declined the request
at SendTransactionParser.parseAndThrowError (@tonconnect_ui-react.js?v=0d7dcad2:422:11)
at TonConnect.<anonymous> (@tonconnect_ui-react.js?v=0d7dcad2:2587:38)

Thank you.

[barinbritva]

@nhannh-senspark hi,

We can modify the buy method written at:
https://github.com/ton-community/flappy-bird/blob/ff2287d668e1d41c76c02201f80c7aa7f1181789/workspaces/client/src/ui.ts#L96

try {
    await this.gameFi.buyWithJetton({
        amount: BigInt(price),
        forwardAmount: BigInt(1),
        forwardPayload: (window as any).Telegram.WebApp.initDataUnsafe.user.id + ':' + itemId
    });

    // Here we know transaction was sent. But it doesn't mean it received
    // Receiving mechanism is implemented on the backend side, in `processTxsForever` function
} catch (error) {
    console.error('Failed to buy an item.', error);
}

1. We added await to buyWithJetton call. In the next line we know transaction was sent
2. We added catch block to handle same errors
3. To handle some others errors or events you need to subscribe for them. Here is the doc: https://www.npmjs.com/package/@tonconnect/ui#tracking. I believe you need to subscribe for transaction-signing-failed event

[nhannh-senspark]

I really appreciate your feedback. Because of the urgent time for the project, I actually had another solution.
But you gave me new information that I really needed, it was very helpful.
Thank you very much, thank you for your project.
Best regards

[barinbritva]

Thanks a lot! I wish you all the best with your projects

[yjk596286200]

Hi，I met the same question. How did you resolve this problem. Could you give me some help.
Thank you very much,