JSPM

Resolver Package

1056 Resolver

Resolver is the implementation of ERC1056 standard. It only exposes the Read functionality of the DID document. The class is implemented with caching. Recurring calls will execute significantly faster.

The design goal of EW DID is to support different DID methods on Energy Web Chain. The resolver currently has the support for ERC1056 standard (ethr DID method). In future, we will have support for ERC725 standard which enables erc725 DID method.

• Importing required modules

import { Resolver, DelegateTypes } from '@ew-did-registry/did-ethr-resolver';

• Reading the DID Document for particular id

    const resolver = new Resolver(provider, resolverSettings);
    const did = 'did:ethr:0xe2e457aB987BEd9AbdEE9410FC985E46e28a3947';
    const didDocument = await resolver.read(did);

• Reading the current owner of the did

This method doesn't require full document fetching. Returns did of the current owner.

    const did = 'did:ethr:0xe2e457aB987BEd9AbdEE9410FC985E46e28a3947';
    const owner = await resolver.identityOwner(did);

• Checking if delegate is present in the DID Document

This read doesn't require full document fetching. Returns boolean if the delegate is present.

    const did = 'did:ethr:0xe2e457aB987BEd9AbdEE9410FC985E46e28a3947';
    const didDelegate = 'did:ewc:0xe2e457aods7BEd9AbdEE9410xt985E46e28a3947';
    const validDelegate = await resolver.validDelegate(did, DelegateTypes.verification, didDelegate);