Any easy way to validate a function signature?

For example:

uint32 num1,address from,bool isTrue should validate to true while

uAint8 num1,addressed to should be false.

The only thing Ive found that does validation is the Abicoder encode function, however I have to provide values for it to work.

Thanks!

[slavik0329]

@ricmoo Amazing! This is exactly what I was hoping for. Works great. Thank you so much for releasing this patch, it will be very useful to me and most likely many others!

[ricmoo]

Yes! I have something locally that I think will do exactly what you want. And be generally useful for now and the future… Just running a bit more testing on it first.

Basically, it will allow you to compute the default values for a given set of parameters. So, you can use it like this:

// Works:
const fragment = ethers.utils.FunctionFragment.from("transfer(uint32 num1,address from,bool isTrue)");
console.log(ethers.utils.defaultAbiCoder.getDefaultValue(fragment.inputs));
/*
[ 0,
  '0x0000000000000000000000000000000000000000',
  false,
  num1: 0,
  from: '0x0000000000000000000000000000000000000000',
  isTrue: false ]
*/

// Throws an Error:
const fragment = ethers.utils.FunctionFragment.from("transfer(uAint8 num1,addressed to)");
console.log(ethers.utils.defaultAbiCoder.getDefaultValue(fragment.inputs));

The CI system seems down right now, but let me know what you think and I’ll try to get this out as soon as possible. 😃