Initial commit, added three sample VC templates and basic code showing how to generate VCs

main.py

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+import asyncio
+import didkit
+import json
+from jinja2 import Environment, FileSystemLoader, select_autoescape
+
+jwk_issuer = didkit.generate_ed25519_key()
+jwk_subject = didkit.generate_ed25519_key()
+
+did_issuer = didkit.key_to_did("key", jwk_issuer)
+did_subject = didkit.key_to_did("key", jwk_subject)
+
+
+async def main():
+    env = Environment(
+        loader=FileSystemLoader("vc_templates"),
+        autoescape=select_autoescape()
+    )
+    unsigned_vc_template = env.get_template("affiliation.jsonld.j2")
+    data = {
+        "vc_id": "http://example.org/credentials/3731",
+        "issuer_did": did_issuer,
+        "subject_did": did_subject,
+        "issuance_date": "2020-08-19T21:41:50Z",
+        "subject_is_member_of": "Pangea"
+    }
+    unsigned_vc = unsigned_vc_template.render(data)
+    signed_credential = await didkit.issue_credential(
+        unsigned_vc,
+        json.dumps({"proofFormat": "ldp"}),
+        jwk_issuer)
+    print(signed_credential)
+
+asyncio.run(main())

requirements.txt

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+jinja2
+didkit

sample_usage

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+(venv) daniel@doloni04:~/PycharmProjects/walletkit_trustchain$ python main.py  | jq .
+{
+  "@context": [
+    "https://www.w3.org/2018/credentials/v1",
+    {
+      "title": "trustchain:title",
+      "member_of": "trustchain:memberof"
+    }
+  ],
+  "id": "http://example.org/credentials/3731",
+  "type": [
+    "VerifiableCredential"
+  ],
+  "credentialSubject": {
+    "id": "did:key:z6MksWDE2Kppe8sH3rAezmzZkQ2ismxD7dqpVvsGGCLYjeau",
+    "member_of": "Pangea"
+  },
+  "issuer": "did:key:z6MkqZ9Ga2xaSaLRLcdv3oic4dQt5gNmJ6cpKqUGdJN7L7sd",
+  "issuanceDate": "2020-08-19T21:41:50Z",
+  "proof": {
+    "type": "Ed25519Signature2018",
+    "proofPurpose": "assertionMethod",
+    "verificationMethod": "did:key:z6MkqZ9Ga2xaSaLRLcdv3oic4dQt5gNmJ6cpKqUGdJN7L7sd#z6MkqZ9Ga2xaSaLRLcdv3oic4dQt5gNmJ6cpKqUGdJN7L7sd",
+    "created": "2023-10-24T08:14:31.901Z",
+    "jws": "eyJhbGciOiJFZERTQSIsImNyaXQiOlsiYjY0Il0sImI2NCI6ZmFsc2V9..0nANd5WsyYCu0FDfLil1LpsIdxNgXNu3SI5G-WuTjcwOaPvU-c2AP_JlOBdIFNx5F6iIbynTOzn0IVi9TzocCQ"
+  }
+}

vc_templates/academic.jsonld.j2

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+{
+    "@context": [
+		"https://www.w3.org/2018/credentials/v1",
+		{
+	    	"title" : "trustchain:title",
+            "name": "trustchain:name",
+            "grade": "trustchain:grade"
+            "date_earned": "trustchain:dateearned"
+        }
+	],
+    "id": "{{ vc_id }}",
+    "type": ["VerifiableCredential"],
+    "issuer": "{{ issuer_did }}",
+    "issuanceDate": "{{ issuance_date }}",
+    "credentialSubject": {
+        "id": "{{ subject_did }}",
+	    "title": {
+		    "name": "{{ degree_name }}",
+		    "grade": "{{ degree_grade_obtained }}",
+            "date_earned": "{{ date_earned }}"
+        }
+	}
+}

vc_templates/affiliation.jsonld.j2

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+{
+    "@context": [
+		"https://www.w3.org/2018/credentials/v1",
+		{
+	    	"title" : "trustchain:title",
+            "member_of": "trustchain:memberof"
+        }
+	],
+    "id": "{{ vc_id }}",
+    "type": ["VerifiableCredential"],
+    "issuer": "{{ issuer_did }}",
+    "issuanceDate": "{{ issuance_date }}",
+    "credentialSubject": {
+        "id": "{{ subject_did }}",
+	    "member_of": "{{ subject_is_member_of }}"
+	}
+}

vc_templates/rescue.jsonld.j2

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+{
+    "@context": [
+		"https://www.w3.org/2018/credentials/v1",
+		{
+	    	"title" : "trustchain:title",
+            "first_name": "trustchain:firstname",
+            "last_name": "trustchain:lastname",
+            "coutry_of_origin": "trustchain:countryoforigin",
+            "rescue_date": "trustchain:rescuedate",
+        }
+	],
+    "id": "{{ vc_id }}",
+    "type": ["VerifiableCredential"],
+    "issuer": "{{ issuer_did }}",
+    "issuanceDate": "{{ issuance_date }}",
+    "credentialSubject": {
+        "id": "{{ subject_did }}",
+        "first_name": "{{ first_name }}",
+        "last_name": "{{ last_name }}",
+        "country_of_origin": "{{ country_of_origin }}",
+        "rescue_date": "{{ rescue_date}}"
+	}
+}