did-provider-quick/src/resolveDID.ts

Veramo plugin that can enable creation and control of did:quick identifiers.

import { DIDResolutionResult, IAgentContext, ICredentialIssuer, ICredentialPlugin, IDataStore, IDataStoreORM, IResolver, TAgent, UniqueVerifiableCredential, VerifiableCredential } from '@veramo/core-types'
import { ICredentialIssuerEIP712 } from '@veramo/credential-eip712'
import { ICredentialIssuerLD } from '@veramo/credential-ld'
import Debug from 'debug'
import { get } from 'http'
import { getDIDQuickUpdates } from './getDIDQuickUpdates.js'
import { multibaseToBytes } from '@veramo/utils'

type IContext = IAgentContext<IResolver & IDataStore & IDataStoreORM & ICredentialPlugin & ICredentialIssuer & ICredentialIssuerEIP712 & ICredentialIssuerLD>

export async function resolveDID(did: string, agent: TAgent<IDataStore & ICredentialPlugin & ICredentialIssuerEIP712 & ICredentialIssuerLD>): Promise<DIDResolutionResult> {
  if (!did.startsWith('did:quick:')) {
    throw Error('DID not of type did:quick')
  }
  const rootDid = did.replace('did:quick:', '')
  const rootDoc = await agent.resolveDid({ didUrl: rootDid })
  const creds = await getDIDQuickUpdates({ did: rootDid }, agent)
  let keyAgreementKeys: any[] = rootDoc.didDocument.keyAgreement ? [...(rootDoc.didDocument.keyAgreement)] : []
  let authenticationKeys: any[] = rootDoc.didDocument.authentication ? [...(rootDoc.didDocument.authentication)] : []
  let verificationMethods: any[] = [...(rootDoc.didDocument.verificationMethod)]
  let serviceEndpoints: any[] = rootDoc.didDocument.service ? [...(rootDoc.didDocument.service)] : []
  // let numKeys = 0
  for (const cred of creds) {
    const { verifiableCredential } = cred

    if (verifiableCredential?.type?.includes('DIDQuickAddKey')) {
      verificationMethods = [...verificationMethods, verifiableCredential.credentialSubject]
      const { keyBytes, keyType } = multibaseToBytes(verifiableCredential.credentialSubject.publicKeyMultibase)
      if (keyType === 'Ed25519' || keyType === "Secp256k1") {
        authenticationKeys = [...authenticationKeys, verifiableCredential.credentialSubject.id]
      }
      if (keyType === 'Ed25519') {
        keyAgreementKeys = [...keyAgreementKeys, verifiableCredential.credentialSubject.id]
      }
    }
  }
  const didDocument = {
    ...rootDoc.didDocument,
    id: 'did:quick:' + rootDid,
    verificationMethod: verificationMethods,
    authentication: authenticationKeys,
    assertionMethod: authenticationKeys,
    keyAgreement: keyAgreementKeys,
    service: serviceEndpoints
  }

  return {
    didDocument,
    didDocumentMetadata: {},
    didResolutionMetadata: {}
  }
}