Transactional Banking System
Full-Stack System • Transactional Integrity • ACID
Mission Directive
Financial systems have zero tolerance for error. Inconsistent states, race conditions, or partial writes can lead to corrupted ledgers and catastrophic financial loss.
OBJECTIVE: Engineer a system where correctness is enforced by design, ensuring every fund transfer is atomic, traceable, and secure.
Security Zones
RBAC_ACTIVEUser Banking Domain
>> Client Operations Node
- [OK]Atomic Fund Transfers
- [OK]Real-time Balance Inquiries
- [OK]Transaction Logs
Administrative Domain
>> Oversight & Compliance Node
- >>Global Monitoring
- >>Account Oversight
- >>System Audit Trails
System Kernels
Transactional Integrity
Implemented atomic operations for all balance updates. A failure at any stage of a transfer rolls back the entire sequence, preventing partial writes and "vanishing money" scenarios.
Secure Authentication
Token-based authentication with strict route protection. Sessions are scoped, ensuring that a standard user token can never trigger an administrative endpoint.
Immutable Audit Logs
Every operation is immutable. The system favors an append-only log strategy for transactions, ensuring that history cannot be rewritten, only appended to.
Consistency Guarantees
Data models are designed to enforce invariants (e.g., balances cannot be negative). Database constraints act as the final line of defense against invalid state transitions.
"A transaction-centric system designed with integrity, access control, and auditability as first-class concerns."
System_Log_End • Dhan Backend Design