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)
44 lines
1.7 KiB
Python
44 lines
1.7 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 CarbonProject(Base):
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__tablename__ = "carbon_projects"
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id = Column(Integer, primary_key=True, index=True)
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title = Column(String, nullable=False)
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description = Column(Text, nullable=False)
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location = Column(String, nullable=False)
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project_type = Column(String, nullable=False) # "forestry", "renewable_energy", "waste_management", etc.
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methodology = Column(String, nullable=False) # Certification methodology used
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# Carbon offset details
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total_credits_available = Column(Integer, nullable=False)
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credits_sold = Column(Integer, default=0)
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price_per_credit = Column(Float, nullable=False) # Price in USD
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# Project timeline
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start_date = Column(DateTime, nullable=False)
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end_date = Column(DateTime, nullable=False)
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# Verification and status
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verification_status = Column(String, default="pending") # "pending", "verified", "rejected"
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verification_document_url = Column(String, nullable=True)
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is_active = Column(Boolean, default=True)
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# Blockchain information
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contract_address = Column(String, nullable=True)
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token_id = 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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developer_id = Column(Integer, ForeignKey("users.id"), nullable=False)
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# Relationships
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developer = relationship("User", back_populates="projects")
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offsets = relationship("CarbonOffset", back_populates="project") |