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""" |
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Modèles Pydantic pour messages SWIFT. |
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Ces modèles peuvent être utilisés avec output_type pour valider |
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automatiquement la structure des messages SWIFT générés. |
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""" |
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from pydantic import BaseModel, Field, field_validator |
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from datetime import datetime |
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class SWIFTFielBase(BaseModel): |
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"""Classe de base pour les champs SWIFT.""" |
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pass |
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class MT103Field32A(BaseModel): |
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"""Champ :32A: Date de valeur, devise, montant.""" |
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value_date: str = Field(description="Date de valeur YYYYMMDD") |
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currency: str = Field(description="Code devise ISO 3 lettres") |
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amount: float = Field(description="Montant", gt=0) |
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@field_validator("value_date") |
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def validate_date(cls, v): |
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if len(v) != 8 or not v.isdigit(): |
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raise ValueError("Date must be YYYYMMDD format") |
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try: |
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datetime.strptime(v, "%Y%m%d") |
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except ValueError: |
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raise ValueError("Invalid date") |
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return v |
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@field_validator("currency") |
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def validate_currency(cls, v): |
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if len(v) != 3 or not v.isalpha(): |
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raise ValueError("Currency must be 3 letter ISO code") |
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return v.upper() |
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class SWIFTMT103Structured(BaseModel): |
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"""Message SWIFT MT103 avec validation complète.""" |
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field_20: str = Field(description=":20: Référence du transfert") |
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field_23B: str = Field(default="CRED", description=":23B: Code instruction") |
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field_32A: MT103Field32A = Field(description=":32A: Date, devise, montant") |
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field_50K: str = Field(description=":50K: Ordre donneur") |
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field_59: str = Field(description=":59: Bénéficiaire") |
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field_70: str | None = Field(default=None, description=":70: Information pour bénéficiaire") |
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field_71A: str = Field(default="OUR", description=":71A: Frais (OUR/SHA/BEN)") |
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@field_validator("field_71A") |
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def validate_charges(cls, v): |
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valid = ["OUR", "SHA", "BEN"] |
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if v not in valid: |
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raise ValueError(f"Charges must be one of {valid}") |
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return v |
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def to_swift_format(self) -> str: |
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"""Convertit en format SWIFT standard.""" |
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lines = [ |
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f":20:{self.field_20}", |
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f":23B:{self.field_23B}", |
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f":32A:{self.field_32A.value_date}{self.field_32A.currency}{self.field_32A.amount:.2f}", |
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f":50K:/{self.field_50K}", |
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f":59:/{self.field_59}", |
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] |
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if self.field_70: |
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lines.append(f":70:{self.field_70}") |
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lines.append(f":71A:{self.field_71A}") |
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return "\n".join(lines) |
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def example_with_validation(): |
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"""Exemple d'utilisation avec validation Pydantic.""" |
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try: |
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mt103 = SWIFTMT103Structured( |
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field_20="TXN-2025-001", |
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field_32A=MT103Field32A( |
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value_date="20250120", |
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currency="EUR", |
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amount=15000.00 |
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), |
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field_50K="FR76300040000100000000000123\nORDRE DUPONT", |
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field_59="FR1420041010050500013M02606\nBENEFICIAIRE MARTIN", |
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field_70="Paiement facture", |
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field_71A="OUR" |
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) |
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print("✅ Message SWIFT validé:") |
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print(mt103.to_swift_format()) |
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except Exception as e: |
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print(f"❌ Erreur de validation: {e}") |
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