Add getEVMChainAddress

[makoto]

Describe the Feature

The current resolver.getAddress(coinType) only supports several coinType mostly because supporting all coin type via https://github.com/ensdomains/address-encoder will increase the file size and dependencies.

I would like to have resolver.getAddress(chainId) that internally converts EVM chainId to cointype and returns EVM compatible address

The reference implementation is at https://github.com/MetaMask/metamask-extension/blob/59c03f2fd600b1d4fe39bf2b93a82215b43a5b3c/ui/ducks/ens.js

Code Example

const address = await getEVMChainAddress(
  web3Provider,
  name,
  chainId,
);

[kunaldo07]

Where can i write the function?

[ricmoo]

In v6.6.0 I've added support for:

• any EVM-compatible chain can be resolved using ENSIP-11
• for full coinType support, the ProviderPluginMulicoin is now available, when attached it will pull in the @ensdomains/address-encoder package and provide support for all coinTypes supported by that library

Try it out and let me know if there are any issues. :)