Display method

Description

To improve credential usage, a client needs to be able to customize the presentation of credentials in user wallets. A standard must be established that will guide the wallet in displaying credential cards. This will improve the user experience and allow issuers to present their own special presentation for credentials.

Changes in the verifiable credential

In protocol level, the display method is integrated into the W3C verifiable credential:

{
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://schema.iden3.io/core/jsonld/displayMethod.jsonld"
    ...
  ],
  ...
  "displayMethod": {
    "id": "ipfs://QmY5ab9FAMEFtdG1VHBXhHANRscUTbDzrG6LC2FWqicc5J",
    "type": "Iden3BasicDisplayMethodV1"
  }
}

The data model of displayMethod:

Field name	Data type	Description	Required
id	string	IPFS link or URL to metadata	✅
type	string	Type of refresh service.	✅

Supported types:

1. Iden3BasicDisplayMethodV1. Type definition. The type supports the metadata format:

   {
     "title": "KYC Country of Residence",
     "description": "Know you customer verification",
     "issuerName": "PolygonID Issuer",
     "titleTextColor": "#000000",
     "descriptionTextColor": "#000000",
     "issuerTextColor": "#000000",
     "backgroundImageUrl": "ipfs://Qmagkvd9Bz8yXXupWZtBC69RqGfRex72Qou1XjUNvC7fLB",
     "logo": {
       "uri": "ipfs://QmWkSgmHbKRfhndWqHwVgfVpZSrWNiWZMTHb6k5KxY8ySc",
       "alt": "Logo PolygonID issuer"
     }
   }
   

   Attribute	Purpose	Data type	Required
   title	Credential title	string	❌
   description	Description	string < 120 characters	❌
   issuerName	Issuer name	string	❌
   titleTextColor	Text color for title and issueName	hex	❌
   descriptionTextColor	Text color for description	hex	❌
   issuerTextColor	Text color for issuer name	hex	❌
   backgroundColor	Background color	hex	❌
   backgroundImageUrl	Background image url	IPFS or URL (.svg, .png)	❌
   logo.uri	Logo URL	IPFS or URL 32x32 (.svg, .png)	❌
   logo.alt	Logo text	string	❌