add encointer

[brenzi]

after polkadot-api/polkadot-api#641 I wanted to do the exercise to add encointer.

This would actually be useful because no mobile wallet is currently supporting Encointer teleports. thanks to dapp browsers, this PR could add that functionality without integration and testing pains on the wallet side

I do need help, however:

• how do I generate .papi/metadata/ksmEnc.scale ?
• polkadot-api 1.0.2 should inculde the PR mentioned above, yet pnpm build complains: Missing "./chains/ksmcc3_encointer" specifier in "polkadot-api" package

[voliva]

Encointer hasn't been released in polkadot-api - Following semantic versioning, 1.0.2 is a bunch of fixes for the 1.0 release.

It will be released for 1.1.0. Once it's there, then you can easily add it with the CLI with pnpm papi add ksmEnc -n ksmcc3_encointer

papi supports adding chains that are not in the well-known chains though, so at this moment you could do it with local chainSpec file or a WS url. Try this: pnpm papi add ksmEnc -w wss://kusama.api.encointer.org.

You will need the chainSpec file if you want to use smoldot though - you could still use a websocket provider too.

These are suggestions if they help get a better picture of how papi deals with different chains. For this repo, I would wait until 1.1.0 is released before merging in.