Crate swift_mt_message 

Swift MT Message Parser - Enhanced Architecture

A comprehensive Rust library for parsing SWIFT MT (Message Type) messages with strong typing, complex field structures, comprehensive validation, and flattened JSON serialization.

Key Features

• Complex Field Structures: Full enum-based field variants (Field50: A/F/K, Field59: A/Basic)
• Flattened JSON Serialization: Clean JSON output without enum wrapper layers
• Type-safe field parsing with dedicated field structs and automatic validation
• Comprehensive Field Support: All MT103 fields with proper SWIFT compliance
• Bidirectional Serialization: Perfect round-trip JSON serialization/deserialization
• Extensive Validation: BIC validation, field length checks, format compliance

Supported Field Types

Complex Enum Fields

• Field50 (Ordering Customer): 50A (Account+BIC), 50F (Party+Address), 50K (Name+Address)
• Field59 (Beneficiary Customer): 59A (Account+BIC), 59 (Basic lines)

Institution Fields (with account_line_indicator)

• Field52A (Ordering Institution): BIC + optional account + account_line_indicator
• Field53A-57A (Correspondent/Intermediary): All with account_line_indicator support

Simple Type Fields

• Field32A (Value Date/Currency/Amount): NaiveDate + String + f64
• Field20, 23B, 70, 71A: Proper field name alignment with old version

JSON Output Structure

The library produces clean, flattened JSON without enum wrapper layers:

{
  "50": {
    "name_and_address": ["JOHN DOE", "123 MAIN ST"]
  },
  "59": {
    "account": "DE89370400440532013000",
    "bic": "DEUTDEFFXXX"
  }
}

Instead of nested enum structures like {"50": {"K": {...}}}.

Re-exports

pub use errors::ParseError;

pub use errors::Result;

pub use errors::SwiftBusinessError;

pub use errors::SwiftContentError;

pub use errors::SwiftFormatError;

pub use errors::SwiftGeneralError;

pub use errors::SwiftRelationError;

pub use errors::SwiftValidationError;

pub use errors::SwiftValidationResult;

pub use errors::ValidationError;

pub use errors::error_codes;

pub use headers::ApplicationHeader;

pub use headers::BasicHeader;

pub use headers::Trailer;

pub use headers::UserHeader;

pub use parsed_message::ParsedSwiftMessage;

pub use parser::SwiftParser;

pub use parser::extract_base_tag;

pub use swift_error_codes as swift_codes;

pub use swift_message::SwiftMessage;

pub use traits::SwiftField;

pub use traits::SwiftMessageBody;

pub use utils::get_field_tag_for_mt;

pub use utils::get_field_tag_with_variant;

pub use validation_result::ValidationResult;

pub use sample::SampleGenerator;

pub use sample::generate_sample;

pub use sample::generate_sample_with_config;

pub use scenario_config::ScenarioConfig;

pub use messages::*;

Modules

errors

Error Handling for SWIFT MT Message Library

fields

SWIFT MT Message Fields

headers

SWIFT Message Headers and Trailers

messages

parsed_message

ParsedSwiftMessage enum for automatic message type detection and parsing

parser

SWIFT MT Message Parser modules

sample

Sample generation functionality for SWIFT MT messages

scenario_config

Test scenario configuration module for generating SWIFT MT messages

swift_error_codes

Complete SWIFT Error Code Constants

swift_message

Complete SWIFT message with headers and body

traits

Core traits for SWIFT field and message types

utils

Utility functions for SWIFT message processing

validation_result

Validation result types for field and message validation

Type Aliases

SwiftResult

Simplified result type for SWIFT operations

Attribute Macros

serde_swift_fields

Attribute macro for automatic serde field generation

Derive Macros

SwiftField

Derive macro for SwiftField trait implementation

SwiftMessage

Derive macro for SwiftMessage trait implementation