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)
33 lines
1.2 KiB
Python
33 lines
1.2 KiB
Python
from sqlalchemy import Column, Integer, String, DateTime, 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 Transaction(Base):
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__tablename__ = "transactions"
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id = Column(Integer, primary_key=True, index=True)
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transaction_hash = Column(String, unique=True, nullable=False)
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quantity = Column(Integer, nullable=False)
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price_per_credit = Column(Float, nullable=False)
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total_amount = Column(Float, nullable=False)
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# Transaction status
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status = Column(String, default="pending") # "pending", "confirmed", "failed"
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# Blockchain information
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block_number = Column(Integer, nullable=True)
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gas_used = Column(Integer, nullable=True)
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# Timestamps
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created_at = Column(DateTime, default=datetime.utcnow)
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confirmed_at = Column(DateTime, nullable=True)
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# Foreign keys
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buyer_id = Column(Integer, ForeignKey("users.id"), nullable=False)
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offset_id = Column(Integer, ForeignKey("carbon_offsets.id"), nullable=False)
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# Relationships
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buyer = relationship("User", back_populates="transactions")
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offset = relationship("CarbonOffset", back_populates="transactions") |