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""" |
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Proof data model representing a cryptographic proof of existence. |
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""" |
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from dataclasses import dataclass, asdict |
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from typing import Optional |
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from datetime import datetime |
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import json |
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@dataclass |
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class Proof: |
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""" |
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Immutable proof object containing hash, metadata, and validation info. |
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""" |
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proof_id: str |
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content_hash: str |
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hash_algorithm: str |
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content_type: str |
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content_size: int |
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timestamp: str |
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validation_status: str |
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metadata: dict |
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extracted_text: Optional[str] = None |
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ocr_engine: Optional[str] = None |
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ocr_status: Optional[str] = None |
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def to_dict(self) -> dict: |
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"""Convert proof to dictionary.""" |
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return asdict(self) |
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def to_json(self) -> str: |
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"""Serialize proof to JSON string.""" |
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return json.dumps(self.to_dict(), indent=2) |
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@classmethod |
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def from_dict(cls, data: dict) -> 'Proof': |
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"""Create proof from dictionary.""" |
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return cls(**data) |
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@classmethod |
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def from_json(cls, json_str: str) -> 'Proof': |
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"""Deserialize proof from JSON string.""" |
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return cls.from_dict(json.loads(json_str)) |
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@dataclass |
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class VerificationResult: |
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""" |
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Result of proof verification operation. |
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""" |
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proof_id: str |
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is_valid: bool |
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original_hash: str |
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computed_hash: str |
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timestamp: str |
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message: str |
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def to_dict(self) -> dict: |
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"""Convert result to dictionary.""" |
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return asdict(self) |
