Lesson 8 13:25:43 - transactionReceipt declaration

[bloomingFlower]

In this code..

provider.once(transactionResponse.hash, (transactionReceipt) => {
        console.log(
            `Complete with ${transactionReceipt.confirmation} confirmation`
        )
    })

where the transactionReceipt comes from..??

[krakxn]

From here:

provider.once(transactionResponse.hash, (transactionReceipt) => {

It is a parameter in the anonymous function.

[bloomingFlower]

Yes.. this is parameter but I can't find its declaration anywhere..

[krakxn]

Because it is not, it is similar to a parameter in a function. It just seems confusing because it is a parameter in an anonymous parameterized function, and as you do not need to explicitly state primitive data types in JavaScript. Put simply, think of it as a parameter.

Also, it is a JavaScript-specific thing, refer anonymous functions.

[alymurtazamemon]

@bloomingFlower It is the result of that function passed to this parameter.

[alymurtazamemon]

@bloomingFlower This is the Web3Provider that we are passing the listen function const provider = new ethers.providers.Web3Provider(window.ethereum); and also the transaction response transactionResponse. This provider was for it complete, once it gets completed, it passes that result to that parameter.