How to confirm msg received on-chain

[sikvelsigma]

Previously, i was checking seqno value for that but I can't seem to find a way to do that in this framework

[sikvelsigma]

solved it by getting seqno through provider.api().runMethod(address, 'seqno') and waiting until it changes, nevertheless, it would be nice to have a more straightforward approach

[tuminzee]

but how can you be sure that the seqno is mapped to your txs? @sikvelsigma

[sikvelsigma]

@tuminzee i can't, but it's enough for my purposes: to run some txs on the contracts i deployed and await their completion and since im the only one interacting with them, it is enough, tho i also await until the target contract's data changes to the expected to confirm operation

[sikvelsigma]

Might as well post these here:

export async function getSeqNo(provider: NetworkProvider, address: Address) {
    if (await provider.isContractDeployed(address)) {
        let res = await provider.api().runMethod((await provider.api().getLastBlock()).last.seqno, address, 'seqno');
        return res.reader.readNumber();
    } else {
        return 0;
    }
}

export async function waitSeqNoChange(provider: NetworkProvider, target: Address, previousSeqno: number) {
    console.log(` - Waiting up to 45 seconds to confirm transaction`);
    let successFlag = 0;
    for (let attempt = 0; attempt < 45; attempt++) {
        await sleep(1000);
        const seqnoAfter = await getSeqNo(provider, target);
        if (seqnoAfter > previousSeqno) {
            successFlag = 1;
            break;
        };
    }
    if (successFlag) {
        console.log(` - Sent transaction done successfully`);
        return true;
    } else {
        console.log(` - Sent transaction didn't go through`);
        return false;
    }
}

export async function awaitConfirmation(fn: () => Promise<boolean>) {
    console.log(` - Waiting up to 45 seconds to confirm operation`);
    let successFlag = 0;
    for (let attempt = 0; attempt < 45; attempt++) {
        await sleep(1000);
        let res = false
        try {
            res = await fn()
        } catch {}
        
        if (res) {
            successFlag = 1
            break
        }
    }
    if (!successFlag) {
        console.log(` - Error confirming operation`);
        return false;
    }
    return true;
}

// example
const seqno = await getSeqNo(provider, provider.sender().address);
// ---------
// send tx here
// ---------
if (await waitSeqNoChange(provider, provider.sender().address, seqno)) {
    if (await awaitConfirmation(async () => {
        const data = await ctr.getData()      // target ctr data
        return data.stuff === 1                  // what we expect to see
    })) {
        console.log(` - Successfully confirmed tx`)
    } else {
        console.log(` - Error confirming tx`)
    }
}

[tuminzee]

@sikvelsigma thank you for sharing the code, very helpful 👍🏼

[howardpen9]

1/ these functions is under script folder?

2/ should we add this in Blueprint in dafult?

[tuminzee]

@howardpen9 having it by default would be a good option, also it makes sense to add it in the interactive menu? so user can select if they want it or not? what do you think about it?