Split transaction.data to an array containing parameters and sighash

[ghost]

Suppose I don't care about ethers.utils.Interface.
I want to split this transaction.data:
0xffffffff00000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001
to, let's say:
splitTX,sighash = "ffffffff"
splitTX.data[0] = BigNumber 1
splitTX.data[1] = BigNumber 1

Then parse splitTX.data[0] as uint256 and into a JavaScript number. (I know JavaScript number limitations with BigNumber)

What's the easiest way to do this without fiddling with ABI?

[ricmoo]

In that specific example, you could use:

selector = utils.hexDataSlice(txData, 0, 4);
p1 = utils.hexDataSlice(txData, 4, 68);
p2 = utils.hexDataSlice(txData, 68);

But generally you should try using the ABI, which is more scalable, as you start trying to parse arbitrary data. The ABI greatly simplifies your life in the long run. :)

[ghost]

I know I should use the ABI, but I'm working in a situation where the selector might change but the parameters probably isn't.
Thank you for your speedy response and your continuation to maintain this great project. I appreciate it so much.

[ghost]

Also, it's not

p1 = utils.hexDataSlice(txData, 4, 68);
p2 = utils.hexDataSlice(txData, 68);

rather

p1 = utils.hexDataSlice(txData, 4, 36);
p2 = utils.hexDataSlice(txData, 36, 68);