Verifiable credentials creation

Author: Sergey Kudryashov

Cargo.toml

@@ -8,3 +8,5 @@ edition = "2021"
 [dependencies]
 serde_json = "1.0.81"
 signature = "1.5.0"
+map = "0.0.0"
+serde = "1.0.137"

src/credential.rs

@@ -0,0 +1,46 @@
+
+#[derive(Deserialize, Debug)]
+pub struct VerifiableCredential {
+	context: String,
+	id: String,
+    credType: String,
+	issuer: String,
+	issuanceDate: String,
+	subject: CredentialSubject,
+	proof: *mut CredentialProof,
+}
+
+impl <'a> VerifiableCredential {
+    pub fn init(credType: &str, credSubject: serde_json::Value) -> Self  {
+        Self {
+            context: String::default(),
+            id: String::default(),
+            credType: String::from(credType),
+            issuer: String::default(),
+            issuanceDate: String::default(),
+            subject: credSubject,
+            proof: &mut CredentialProof{
+                proofType:String::default(),
+                created:String::default(),
+                verificationMethod:String::default(),
+                proofPurpose:String::default(),
+                proofValue:String::default(),
+            },
+        }
+    }
+}
+
+
+pub struct CredentialProof {
+	proofType: String,
+	created: String,
+	verificationMethod: String,
+	proofPurpose: String,
+	proofValue: String,
+}
+
+pub enum CredentialSubject {
+    String,
+    Value, 
+    Object(serde_json::Map<String, serde_json::Value>),
+}

src/lib.rs

@@ -1,3 +1,10 @@
+mod credential;
+use serde_json;
+use credential::*;
+use serde::Deserialize;
+use serde_json::Map;
+// pub use crate::map::Map;
+
 /// Verification of Data Integrity Proofs requires the resolution of the `verificationMethod` specified in the proof.
 /// The `verificationMethod` refers to a cryptographic key stored in some external source.
 /// The DIDResolver is responsible for resolving the `verificationMethod` to a key that can be used to verify the proof.
@@ -15,7 +22,9 @@ pub fn create_credential(
     _cred_type: &str,
     _cred_subject: serde_json::Value,
 ) -> Result<serde_json::Value, Box<dyn std::error::Error>> {
-    unimplemented!();
+    let vc = VerifiableCredential::init(_cred_type, _cred_subject);
+    Ok(_cred_subject)
+    // let vcVec = serde_json::from_str(_cred_type.unwrap();
 }
 
 /// Given the set of credentials, create a unsigned JSON-LD Presentation of those credentials.