move associations file

src/database/associations.js

@@ -0,0 +1,36 @@
+class AssociationsDefiner {
+  constructor({ models, DataTypes }) {
+    this.models = models;
+    this.DataTypes = DataTypes;
+  }
+
+  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',
+    });
+    this.models.OfferDeleted.belongsTo(this.models.OfferCreated, {
+      foreignKey: {
+        name: 'offer_uuid',
+        type: this.DataTypes.UUID,
+        allowNull: false,
+      },
+    });
+  }
+}
+
+module.exports = AssociationsDefiner;