diff --git a/Dockerfile b/Dockerfile
index 0bc8e59..8bd47b3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ WORKDIR /app
 COPY . /app
 
 # Install dependencies
-RUN pip install --no-cache-dir -r requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt --verbose
 
 # Expose port 5000 for the Flask app
 EXPOSE 5000
diff --git a/app/__init__.py b/app/__init__.py
index 732af48..d2fab1c 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -7,10 +7,7 @@ from app.api.routes import api
 from app.errors import register_error_handlers
 from flask_sqlalchemy import SQLAlchemy
 from flask_migrate import Migrate
-
-
-db = SQLAlchemy()
-migrate = Migrate()
+from app.extensions import db, migrate
 
 def create_app():
     """ Factory function to create a Flask app instance """
diff --git a/app/api/enums/__init__.py b/app/api/enums/__init__.py
new file mode 100644
index 0000000..cf543fd
--- /dev/null
+++ b/app/api/enums/__init__.py
@@ -0,0 +1 @@
+from .transaction_type import transaction_type
\ No newline at end of file
diff --git a/app/api/enums/transaction_type.py b/app/api/enums/transaction_type.py
new file mode 100644
index 0000000..2f5ac09
--- /dev/null
+++ b/app/api/enums/transaction_type.py
@@ -0,0 +1,6 @@
+from enum import Enum
+
+class transaction_type(str, Enum):
+    ELIGIBILITY_CHECK = "eligibility_check"
+    PAYMENT = "payment"
+    REPAYMENT = "repayment"
diff --git a/app/api/services/base_service.py b/app/api/services/base_service.py
new file mode 100644
index 0000000..02e73c2
--- /dev/null
+++ b/app/api/services/base_service.py
@@ -0,0 +1,28 @@
+from app.models import Transaction
+from app.api.enums import transaction_type
+from flask import jsonify
+from marshmallow import ValidationError
+import logging
+
+logger = logging.getLogger(__name__)
+
+class BaseService:
+    TRANSACTION_TYPE = None
+
+    @classmethod
+    def log_transaction(cls, data, schema):
+            logger.info(f"Processing {cls.TRANSACTION_TYPE} request")
+
+            validated_data = schema.load(data)
+
+            transaction = Transaction.create_transaction(
+                id=validated_data.get("transactionId"),
+                account_id=validated_data.get("accountId"),
+                customer_id=validated_data.get("customerId"),
+                type=cls.TRANSACTION_TYPE,
+                channel=validated_data.get("channel"),
+                msisdn=validated_data.get("msisdn"),
+                country_code=validated_data.get("countryCode")
+            )
+
+            return transaction
\ No newline at end of file
diff --git a/app/api/services/eligibility_check.py b/app/api/services/eligibility_check.py
index 2d7cd63..5343a3a 100644
--- a/app/api/services/eligibility_check.py
+++ b/app/api/services/eligibility_check.py
@@ -1,9 +1,14 @@
 from flask import session, jsonify
 from app.utils.logger import logger
+from app.api.services.base_service import BaseService
 from app.api.schemas.eligibility_check import EligibilityCheckSchema
 from marshmallow import ValidationError
+from app.models import Transaction
+from app.api.enums import transaction_type
+
+class EligibilityCheckService(BaseService):
+    TRANSACTION_TYPE = transaction_type.ELIGIBILITY_CHECK 
 
-class EligibilityCheckService:
     @staticmethod
     def process_request(data):
         """
@@ -16,11 +21,14 @@ class EligibilityCheckService:
             dict: A standardized response.
         """
         try:
-            logger.info("Processing EligibilityCheck request")
+            transaction = EligibilityCheckService.log_transaction(data, EligibilityCheckSchema())
+
+            if not transaction:
+                logger.error(f"Customer creation failed")
+                return jsonify({
+                    "message": "Customer creation failed." . customer
+                }), 400
 
-            # Validate input data using Schema
-            schema = EligibilityCheckSchema()
-            validated_data = schema.load(data) # Raises an error if invalid
 
             offers = [
                 {
@@ -51,13 +59,6 @@ class EligibilityCheckService:
                 "accountId": "ACN8263457"
                 }
 
-
-            # Return a success response
-            # return ResponseHelper.success(
-            #     data=response_data,
-            #     message="Eligibility check completed successfully"
-            # )
-
             return response_data
         except ValidationError as err:
             logger.error(f"Validation Error: {err.messages}")
diff --git a/app/extensions.py b/app/extensions.py
new file mode 100644
index 0000000..de1947d
--- /dev/null
+++ b/app/extensions.py
@@ -0,0 +1,5 @@
+from flask_sqlalchemy import SQLAlchemy
+from flask_migrate import Migrate
+
+db = SQLAlchemy()
+migrate = Migrate()
\ No newline at end of file
diff --git a/app/models/account.py b/app/models/account.py
index 3a66113..c4254b9 100644
--- a/app/models/account.py
+++ b/app/models/account.py
@@ -1,5 +1,5 @@
 from datetime import datetime, timezone
-from app import db
+from app.extensions import db
 
 class Account(db.Model):
     __tablename__ = 'accounts'
@@ -12,14 +12,16 @@ class Account(db.Model):
     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))
 
-    # Database relationship
-    # customer = db.relationship(
-    #     'Customer',
-    #     primaryjoin='Account.customer_id == Customer.id',
-    #     backref='accounts',
-    #     foreign_keys=[customer_id],
-    #     viewonly=True
-    # )
+    @classmethod
+    def create_account(cls, id, customer_id, account_type, status='active'):
+        account = cls(
+            id=id,
+            customer_id=customer_id,
+            account_type=account_type
+        )
+        db.session.add(account)
+        db.session.commit()
+        return account
 
     @classmethod
     def is_valid_account(cls, account_id, customer_id):
diff --git a/app/models/customer.py b/app/models/customer.py
index aa31073..b6eb1de 100644
--- a/app/models/customer.py
+++ b/app/models/customer.py
@@ -1,5 +1,6 @@
 from datetime import datetime, timezone
-from app import db
+from app.extensions import db
+from app.models.account import Account
 
 class Customer(db.Model):
     __tablename__ = 'customers'
@@ -17,6 +18,24 @@ class Customer(db.Model):
             return False, "Customer not found"
         return True, "Customer is eligible"
 
+    @classmethod
+    def create_customer(cls, id, msisdn, country_code, account_id, account_type='savings'):
+        if cls.query.filter_by(msisdn=msisdn).first():
+            return False, "Customer with this MSISDN already exists"
+        
+        # Create the customer
+        customer = cls(id=id, msisdn=msisdn, country_code=country_code)
+        db.session.add(customer)
+        
+        # Create an associated account
+        account = Account.create_account(
+            id=account_id,
+            customer_id=id,
+            account_type=account_type
+        )
+        
+        db.session.commit()
+        return customer
+
     def __repr__(self):
         return f'<Customer {self.id}>'
-    
diff --git a/app/models/loan.py b/app/models/loan.py
index 5b9557b..6fa73a1 100644
--- a/app/models/loan.py
+++ b/app/models/loan.py
@@ -1,5 +1,5 @@
 from datetime import datetime, timezone
-from app import db
+from app.extensions import db
 
 
 class Loan(db.Model):
diff --git a/app/models/offer.py b/app/models/offer.py
index 47fe6b3..ce62fa2 100644
--- a/app/models/offer.py
+++ b/app/models/offer.py
@@ -1,5 +1,5 @@
 from datetime import datetime, timezone
-from app import db
+from app.extensions import db
 
 class Offer(db.Model):
     __tablename__ = 'offers'
diff --git a/app/models/transaction.py b/app/models/transaction.py
index 85317bd..010b31e 100644
--- a/app/models/transaction.py
+++ b/app/models/transaction.py
@@ -1,16 +1,41 @@
 from datetime import datetime, timezone
-from app import db
+from app.extensions import db
+from app.models import Customer
 
 class Transaction(db.Model):
     __tablename__ = 'transactions'
 
     id = db.Column(db.String(50), primary_key=True)
-    account_id = db.Column(db.String(50), nullable=False)
+    customer_id = db.Column(db.String(50), nullable=False)
     type = db.Column(db.String(50), nullable=False)
-    amount = db.Column(db.Float, nullable=False)
-    status = db.Column(db.String(20), default='pending')
+    channel = 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'<Transaction {self.id}>'
\ No newline at end of file
+        return f'<Transaction {self.id}>'
+
+    @classmethod
+    def create_transaction(cls, id, account_id, customer_id, type, channel, msisdn, country_code,):
+        transaction = cls(
+            id=id,
+            customer_id=customer_id,
+            type=type,
+            channel=channel
+
+        )
+
+        customer = Customer.create_customer(
+            id=customer_id,
+            msisdn= msisdn,
+            country_code= country_code,
+            account_id= account_id,
+        )
+
+        db.session.add(transaction)
+        db.session.commit()
+        return transaction
+
+    @classmethod
+    def get_transaction_by_id(cls, transaction_id):
+        return cls.query.get(transaction_id)
\ No newline at end of file