done with check transaction_id on repayment

app/models/__init__.py

@@ -1,3 +1,4 @@
 from .transactions import Transaction
+from .repayment import Repayment
 
-__all__ = ['Transaction']
+__all__ = ['Transaction', 'Repayment']

app/models/repayment.py

@@ -0,0 +1,24 @@
+from app.extensions import db
+from datetime import datetime, timezone
+
+class Repayment(db.Model):
+    __tablename__ = "repayments"
+
+    id = db.Column(
+        db.Integer,
+        primary_key=True,
+        autoincrement=True,
+    )
+    loan_id = db.Column(db.String(50), nullable=False)
+    customer_id = db.Column(db.String(50), nullable=False)
+    product_id = db.Column(db.String(20), nullable=True)
+    transaction_id = db.Column(db.String(50), nullable=False)
+    created_at = db.Column(db.DateTime, default=datetime.now(timezone.utc))
+    updated_at = db.Column(db.DateTime, default=datetime.now(timezone.utc), onupdate=datetime.now(timezone.utc))
+
+    def __repr__(self):
+        return f'<Repayment {self.id}>'
+
+    @classmethod
+    def get_repayment_by_transaction_id(cls, transaction_id):
+        return cls.query.filter_by(transaction_id=transaction_id).first()