feat(oob): support fetching shortened invitation urls (#840)

Signed-off-by: KolbyRKunz <KolbyKunz@yahoo.com>

packages/core/package.json

@@ -49,6 +49,7 @@
     "web-did-resolver": "^2.0.8"
   },
   "devDependencies": {
+    "node-fetch": "^2.0",
     "@types/bn.js": "^5.1.0",
     "@types/events": "^3.0.0",
     "@types/luxon": "^1.27.0",

packages/core/src/modules/connections/messages/ConnectionInvitationMessage.ts

@@ -121,22 +121,18 @@ export class ConnectionInvitationMessage extends AgentMessage {
    *
    * @param invitationUrl invitation url containing c_i or d_m parameter
    *
-   * @throws Error when url can not be decoded to JSON, or decoded message is not a valid `ConnectionInvitationMessage`
-   * @throws Error when the url does not contain c_i or d_m as parameter
+   * @throws Error when the url can not be decoded to JSON, or decoded message is not a valid 'ConnectionInvitationMessage'
    */
   public static fromUrl(invitationUrl: string) {
     const parsedUrl = parseUrl(invitationUrl).query
     const encodedInvitation = parsedUrl['c_i'] ?? parsedUrl['d_m']
-
     if (typeof encodedInvitation === 'string') {
       const invitationJson = JsonEncoder.fromBase64(encodedInvitation)
       const invitation = JsonTransformer.fromJSON(invitationJson, ConnectionInvitationMessage)
 
       return invitation
     } else {
-      throw new AriesFrameworkError(
-        'InvitationUrl is invalid. It needs to contain one, and only one, of the following parameters; `c_i` or `d_m`'
-      )
+      throw new AriesFrameworkError('InvitationUrl is invalid. Needs to be encoded with either c_i, d_m, or oob')
     }
   }
 }

packages/core/src/modules/oob/OutOfBandModule.ts

@@ -23,7 +23,7 @@ import { injectable, module } from '../../plugins'
 import { DidCommMessageRepository, DidCommMessageRole } from '../../storage'
 import { JsonEncoder, JsonTransformer } from '../../utils'
 import { parseMessageType, supportsIncomingMessageType } from '../../utils/messageType'
-import { parseInvitationUrl } from '../../utils/parseInvitation'
+import { parseInvitationUrl, parseInvitationShortUrl } from '../../utils/parseInvitation'
 import { DidKey } from '../dids'
 import { didKeyToVerkey } from '../dids/helpers'
 import { outOfBandServiceToNumAlgo2Did } from '../dids/methods/peer/peerDidNumAlgo2'
@@ -271,8 +271,8 @@ export class OutOfBandModule {
    * @param config configuration of how out-of-band invitation should be processed
    * @returns out-of-band record and connection record if one has been created
    */
-  public receiveInvitationFromUrl(invitationUrl: string, config: ReceiveOutOfBandInvitationConfig = {}) {
-    const message = this.parseInvitation(invitationUrl)
+  public async receiveInvitationFromUrl(invitationUrl: string, config: ReceiveOutOfBandInvitationConfig = {}) {
+    const message = await this.parseInvitationShortUrl(invitationUrl)
     return this.receiveInvitation(message, config)
   }
 
@@ -287,6 +287,18 @@ export class OutOfBandModule {
     return parseInvitationUrl(invitationUrl)
   }
 
+  /**
+   * Parses URL containing encoded invitation and returns invitation message. Compatible with
+   * parsing shortened URLs
+   *
+   * @param invitationUrl URL containing encoded invitation
+   *
+   * @returns OutOfBandInvitation
+   */
+  public async parseInvitationShortUrl(invitation: string): Promise<OutOfBandInvitation> {
+    return await parseInvitationShortUrl(invitation, this.agentConfig.agentDependencies)
+  }
+
   /**
    * Creates inbound out-of-band record and assigns out-of-band invitation message to it if the
    * message is valid. It automatically passes out-of-band invitation for further processing to