e122f16dea
Features implemented: - User authentication with JWT tokens and role-based access (developer/buyer) - Blockchain wallet linking and management with Ethereum integration - Carbon project creation and management for developers - Marketplace for browsing and purchasing carbon offsets - Transaction tracking with blockchain integration - Database models for users, projects, offsets, and transactions - Comprehensive API with authentication, wallet, project, and trading endpoints - Health check endpoint and platform information - SQLite database with Alembic migrations - Full API documentation with OpenAPI/Swagger Technical stack: - FastAPI with Python - SQLAlchemy ORM with SQLite - Web3.py for blockchain integration - JWT authentication with bcrypt - CORS enabled for frontend integration - Comprehensive error handling and validation Environment variables required: - SECRET_KEY (JWT secret) - BLOCKCHAIN_RPC_URL (optional, defaults to localhost)
29 lines
1.1 KiB
Python
29 lines
1.1 KiB
Python
from sqlalchemy import Column, Integer, String, DateTime, Boolean, Text, Float, ForeignKey
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from sqlalchemy.orm import relationship
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from datetime import datetime
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from app.db.base import Base
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class CarbonOffset(Base):
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__tablename__ = "carbon_offsets"
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id = Column(Integer, primary_key=True, index=True)
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serial_number = Column(String, unique=True, nullable=False)
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vintage_year = Column(Integer, nullable=False)
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quantity = Column(Integer, nullable=False) # Number of credits
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status = Column(String, default="available") # "available", "sold", "retired"
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# Blockchain information
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token_id = Column(String, unique=True, nullable=True)
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blockchain_hash = Column(String, nullable=True)
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# Timestamps
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created_at = Column(DateTime, default=datetime.utcnow)
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updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
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# Foreign keys
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project_id = Column(Integer, ForeignKey("carbon_projects.id"), nullable=False)
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# Relationships
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project = relationship("CarbonProject", back_populates="offsets")
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transactions = relationship("Transaction", back_populates="offset") |