relationship

src/associations.js

@@ -5,6 +5,21 @@ class AssociationsDefiner {
   }
 
   define() {
+    this.models.NostrChallengeCreated.hasOne(
+      this.models.NostrChallengeCompleted,
+      {
+        foreignKey: 'challenge',
+      }
+    );
+    this.models.NostrChallengeCompleted.belongsTo(
+      this.models.NostrChallengeCreated,
+      {
+        foreignKey: {
+          name: 'challenge',
+        },
+      }
+    );
+
     this.models.OfferCreated.hasOne(this.models.OfferDeleted, {
       foreignKey: 'offer_uuid',
     });

src/models/NostrChallengeCompleted.js

@@ -17,6 +17,7 @@ class NostrChallengeCompletedProvider {
         challenge: {
           type: this.DataTypes.STRING,
           allowNull: false,
+          unique: true,
         },
         signed_event: {
           type: this.DataTypes.JSONB,

src/models/NostrChallengeCreated.js

@@ -17,6 +17,7 @@ class NostrChallengeCreatedProvider {
         challenge: {
           type: this.DataTypes.STRING,
           allowNull: false,
+          unique: true,
         },
         expires_at: {
           type: this.DataTypes.DATE,