fintech▌

Create a link_token for Plaid Link, exchange public_token for access_token. Link tokens are short-lived, one-time use. Access tokens don't expire but may need updating when users change passwords.

Layer 3: Domain Constraints

Fintech domain constraints and design patterns for building precise, auditable financial systems in Rust. \n \n Enforces decimal precision (never f64) using rust_decimal, immutable transaction records with Arc, and double-entry accounting principles to prevent money loss or inconsistency \n Provides currency newtypes, transaction aggregates, and audit logging patterns aligned with regulatory compliance and dispute resolution requirements \n Maps domain rules (precision, audit trails, consistency

Create a link_token for Plaid Link, exchange public_token for access_token. Link tokens are short-lived, one-time use. Access tokens don't expire but may need updating when users change passwords.

Provides expert guidance on building financial technology systems with proper accounting principles, regulatory compliance, and high-precision calculations. Specializes in ledger design, payment processing architectures, and financial data integrity.