How do I get all the transaction functions in an ABI?

[reddyismav]

So if given an ABI, I need all the functions that result in a transaction.
So types like 'pure', 'view' etc can be excluded, and I get back the functions which result in transactions.

If I remember correctly, in the past, you could NOT specify view on a function, but it wouldn't still result in a transaction. so, excluding view|pure type functions from ABI mightn't be 100% correct.

Is there anything I can use for this.

[ricmoo]

The easiest is probably:

// If you have a Contract object, you can use contract.interface instead of this next line
const iface = new ethers.utils.Interface(abi);

// Filter out the fragments that are functions and not constants
const txFuncs = iface.fragments.filter((f) => (f.type === "function" && !f.constant));

Let me know if that works for you.

[reddyismav]

Yeah but I want to also exclude functions which are only view or pure functions. I want only the functions that result in a transaction.

[ricmoo]

Yeah. The above will do that. The pure and view methods are constant. The ethers parser populates the constant field in the Fragment object, even if not present in the ABI.

[reddyismav]

Got it!! Thanks!