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78 lines
2.5 KiB
Python
78 lines
2.5 KiB
Python
"""LEO (Ledger Evidence Object) model"""
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from sqlalchemy import Column, Integer, String, DateTime, Text
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from sqlalchemy.sql import func
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from app.database import Base
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class LEO(Base):
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"""
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Ledger Evidence Object (LEO) model
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Cryptographic proof-of-origin for ideas and intellectual property.
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Stores hashes and metadata suitable for blockchain anchoring.
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"""
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__tablename__ = "leos"
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id = Column(String(36), primary_key=True, index=True) # UUID
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author = Column(String(255), nullable=False, default="Alexa")
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title = Column(String(500), nullable=True)
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# Cryptographic hashes
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sha256 = Column(String(64), nullable=False, index=True)
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sha512 = Column(String(128), nullable=False)
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keccak256 = Column(String(64), nullable=False)
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# Metadata
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canonical_size = Column(Integer, nullable=False)
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# Blockchain anchoring
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anchor_status = Column(
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String(20),
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nullable=False,
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default="pending"
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) # pending, anchored, failed
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anchor_txid = Column(String(128), nullable=True)
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anchor_chain = Column(String(50), nullable=True)
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anchor_block_height = Column(Integer, nullable=True)
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anchored_at = Column(DateTime(timezone=True), nullable=True)
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# Timestamps
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created_at = Column(DateTime(timezone=True), server_default=func.now(), nullable=False)
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updated_at = Column(DateTime(timezone=True), onupdate=func.now())
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def __repr__(self):
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return f"<LEO {self.id} by {self.author}>"
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class AnchorEvent(Base):
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"""
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Blockchain anchor event audit trail
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Tracks all anchoring attempts and status changes for LEOs.
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"""
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__tablename__ = "anchor_events"
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id = Column(Integer, primary_key=True, index=True)
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leo_id = Column(String(36), nullable=False, index=True)
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# Event details
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event_type = Column(String(50), nullable=False) # anchor_initiated, anchor_confirmed, anchor_failed
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chain = Column(String(50), nullable=True)
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txid = Column(String(128), nullable=True)
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block_height = Column(Integer, nullable=True)
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# Status
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status = Column(String(20), nullable=False) # pending, confirmed, failed
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error_message = Column(Text, nullable=True)
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# Metadata (attribute renamed from 'metadata' to avoid SQLAlchemy reserved attribute)
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event_metadata = Column("metadata", Text, nullable=True) # JSON serialized
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# Timestamps
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created_at = Column(DateTime(timezone=True), server_default=func.now(), nullable=False)
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def __repr__(self):
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return f"<AnchorEvent {self.id} for LEO {self.leo_id}>"
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