Process Transformation Event

info

Please note that this content is under development and is not ready for implementation. This status message will be updated as content development progresses.

Description

The processTransformationEvent service is responsible for processing a Transformation Event (DTE), issuing Verifiable Credentials (VCs) for both the Transformation Event and Digital Product Passports (DPPs), uploading them to the Storage service, registering the link to the stored DTE and DPPs with the Identity Resolver service, and managing Transaction events in local storage associated with the event. It handles the entire lifecycle of creating and managing transformation events and associated DPPs.

Diagram

Example

{
  "name": "processTransformationEvent",
  "parameters": [
    {
      "vckit": {
        "vckitAPIUrl": "http://localhost:3332/v2",
        "issuer": "did:web:uncefact.github.io:project-vckit:test-and-development",
        "headers": {
          "Authorization": "Bearer test123"
        }
      },
      "epcisTransformationEvent": {
        "context": ["https://www.w3.org/2018/credentials/v1", "https://gs1.org/voc/"],
        "type": ["DigitalTraceabilityEvent"],
        "renderTemplate": [
          {
            "type": "html",
            "template": "<div><h2>Transformation Event</h2><p>Output: {{outputItems.0.epc}}</p></div>"
          }
        ],
        "dlrIdentificationKeyType": "gtin",
        "dlrLinkTitle": "Transformation Event",
        "dlrVerificationPage": "https://verify.example.com",
        "validUntil": "2025-11-28T04:47:15.136Z"
      },
      "dlr": {
        "dlrAPIUrl": "https://dlr.example.com/api",
        "dlrAPIKey": "dlr-api-key-12345",
        "namespace": "gs1",
        "linkRegisterPath": "/api/resolver"
      },
      "storage": {
        "url": "http://localhost:3334/v1/documents",
        "params": {
          "bucket": "verifiable-credentials"
        },
        "options": {
          "method": "POST",
          "headers": {
            "Content-Type": "application/json"
          }
        }
      },
      "dpp": {
        "context": ["https://www.w3.org/2018/credentials/v1", "https://schema.org/"],
        "type": ["DigitalProductPassport"],
        "renderTemplate": [
          {
            "type": "html",
            "template": "<div><h2>Product DPP</h2><p>EPC: {{epc}}</p></div>"
          }
        ],
        "dlrIdentificationKeyType": "gtin",
        "dlrLinkTitle": "Product DPP",
        "dlrVerificationPage": "https://verify.example.com",
        "validUntil": "2025-11-28T04:47:15.136Z"
      },
      "dppCredentials": [
        {
          "mappingFields": [
            {
              "sourcePath": "/vc/credentialSubject/outputItems/0/epc",
              "destinationPath": "/epc"
            }
          ]
        }
      ],
      "identifierKeyPath": "/outputItems/0/epc",
      "transformationEventCredential": {
        "mappingFields": [
          {
            "sourcePath": "/inputItems",
            "destinationPath": "/inputQuantityList"
          },
          {
            "sourcePath": "/outputItems",
            "destinationPath": "/outputQuantityList"
          }
        ],
        "generationFields": [
          {
            "path": "/eventTime",
            "handler": "generateCurrentDatetime"
          },
          {
            "path": "/eventID",
            "handler": "generateUUID"
          }
        ]
      }
    }
  ]
}

Definitions

Property	Required	Description	Type
vckit	Yes	Configuration for the VCKit service	VCKit
epcisTransformationEvent	Yes	Configuration for the EPCIS Transformation Event	Credential
dlr	Yes	Configuration for the Digital Link Resolver	IDR
storage	Yes	Configuration for storage service	Storage
dpp	Yes	Configuration for the Digital Product Passport	Credential
dppCredentials	Yes	Mapping configuration for DPP credentials	Construct Data[]
identifierKeyPath	Yes	JSON path to the identifier in the credential subject or the object for function and arguments of JSON path to construct identifier	IdentifierKeyPath
transformationEventCredential	Yes	Mapping and generation configuration for the transformation event credential	Construct Data

Function type

Type	Description
ReturnData	It processes the input data or generates data independently and returns the processed result after successful execution.