Module headers 

SWIFT Message Headers and Trailers

Purpose

Comprehensive header and trailer structures for SWIFT MT messages, implementing the complete SWIFT FIN block structure including Basic Header (Block 1), Application Header (Block 2), User Header (Block 3), and Trailer (Block 5).

Block Structure

• Block 1: Basic Header - Sender identification and routing information
• Block 2: Application Header - Message type and delivery information
• Block 3: User Header - Optional user-defined fields and references
• Block 5: Trailer - Optional authentication and delivery confirmation

Features

• Complete SWIFT Compliance: Follows SWIFT User Handbook specifications
• Type-Safe Parsing: Strongly-typed header structures with validation
• Authentication Support: MAC and authentication key handling
• Sample Generation: Realistic header generation for testing
• Network Validation: BIC validation and routing verification

Structs

ApplicationHeader

Application Header (Block 2): Message Type and Routing Information

BalanceCheckpoint

Balance checkpoint structure for Tag 423

BasicHeader

Basic Header (Block 1): SWIFT Message Identification and Routing

MessageInputReference

Message Input Reference structure for Tag 106

MessageOutputReference

Message Output Reference structure (similar to MIR but for output)

MessageReference

Message Reference structure for MRF tag

PaymentControlsInfo

Payment controls information structure for Tag 434

PaymentReleaseInfo

Payment release information structure for Tag 165

PossibleDuplicateEmission

Possible Duplicate Emission structure for PDE tag

PossibleDuplicateMessage

Possible Duplicate Message structure for PDM tag

SanctionsScreeningInfo

Sanctions screening information structure for Tag 433

SystemOriginatedMessage

System Originated Message structure for SYS tag

Trailer

Trailer (Block 5): Message Security and Control Information

UserHeader

User Header (Block 3): Extended Service Options and Controls