Typechain fails when there is a `provider` method on contract

with the error message:

Property 'provider' in type 'MMInstantiator' is not assignable to the same property in base type 'Contract'.
  Type '(_index: BigNumberish, overrides?: CallOverrides | undefined) => Promise<string>' is not assignable to type 'Provider'.ts(2416)
Class 'Contract' defines instance member property 'provider', but extended class 'MMInstantiator' defines it as instance member function.ts(2425)

If I rename it, then all issues go away. Currently, I cannot lightly rename this method since there are deployed contracts already working with the current ABI.

[zemse]

I wonder what does Ethers itself do in this case?

ethers have two ways of calling a method, using the function and signature string:

contract.balanceOf('0xaddr')
contract['balanceOf[uint256]']('0xaddr')

AFAIK, when there are some conflicts with ethers reserved properties on the contract like provider in this case, ethers.js drops that function but the alternate method is available. There was an issue on ethers repo maybe a year back, I couldn’t find it to link here.

contract['provider(uint256)'](123)

@gbarros You can use this alternate syntax in your project. And until this problem is fixed, whenever you run typechain you’d just need to remove the function (which is highlighted as error). And the fix is probably about removing functions with reserved names.

[krzkaczor]

Released: https://github.com/ethereum-ts/TypeChain/releases/tag/typechain%404.0.1