Refactor code and enhance maintainability.

Author: abrar2030

code/backend/.env.example

@@ -0,0 +1,62 @@
+# Flask Configuration
+FLASK_ENV=development
+SECRET_KEY=your-secret-key-here
+DEBUG=True
+
+# JWT Configuration
+JWT_SECRET_KEY=your-jwt-secret-key-here
+JWT_ACCESS_TOKEN_EXPIRES=900
+JWT_REFRESH_TOKEN_EXPIRES=604800
+
+# Database Configuration
+DATABASE_URL=sqlite:///blockscore.db
+# For PostgreSQL: postgresql://user:password@localhost:5432/blockscore
+# For MySQL: mysql://user:password@localhost:3306/blockscore
+
+# Redis Configuration (optional)
+REDIS_URL=redis://localhost:6379/0
+
+# Blockchain Configuration
+BLOCKCHAIN_PROVIDER_URL=http://localhost:8545
+BLOCKCHAIN_FROM_ADDRESS=0x0000000000000000000000000000000000000000
+BLOCKCHAIN_PRIVATE_KEY=
+CONTRACT_ADDRESS=0x0000000000000000000000000000000000000000
+
+# Contract Addresses (optional)
+CREDIT_SCORE_CONTRACT_ADDRESS=
+LOAN_AGREEMENT_CONTRACT_ADDRESS=
+IDENTITY_REGISTRY_CONTRACT_ADDRESS=
+PAYMENT_PROCESSOR_CONTRACT_ADDRESS=
+
+# Blockchain Network
+BLOCKCHAIN_NETWORK_ID=1
+BLOCKCHAIN_NETWORK_NAME=ethereum
+
+# Security Configuration
+BCRYPT_LOG_ROUNDS=12
+
+# Rate Limiting
+RATE_LIMIT_DEFAULT=100 per hour
+RATE_LIMIT_LOGIN=5 per minute
+
+# Celery Configuration (optional)
+CELERY_BROKER_URL=redis://localhost:6379/1
+CELERY_RESULT_BACKEND=redis://localhost:6379/2
+
+# MFA Configuration
+MFA_ENCRYPTION_KEY=your-mfa-encryption-key-here
+
+# SMS Provider (optional)
+SMS_PROVIDER_URL=
+SMS_API_KEY=
+
+# Email Service (optional)
+EMAIL_SERVICE_URL=
+EMAIL_API_KEY=
+
+# API Keys (optional)
+CREDIT_BUREAU_API_KEY=
+IDENTITY_VERIFICATION_API_KEY=
+
+# Logging
+LOG_LEVEL=INFO