Implement comprehensive cryptocurrency exchange platform
- Built complete CEX platform with FastAPI and Python - JWT-based authentication system with secure password hashing - Multi-currency crypto wallet support (BTC, ETH, USDT) - Fiat account management (USD, EUR, GBP) - Local transaction signing without external APIs - Comprehensive transaction handling (send/receive/deposit/withdraw) - SQLAlchemy models with Alembic migrations - Security middleware (rate limiting, headers, logging) - Input validation and sanitization - Encrypted private key storage with PBKDF2 - Standardized codebase architecture with service layer pattern - Complete API documentation with health endpoints - Comprehensive README with setup instructions Features: - User registration and authentication - Crypto wallet creation and management - Secure transaction signing using local private keys - Fiat deposit/withdrawal system - Transaction history and tracking - Rate limiting and security headers - Input validation for all endpoints - Error handling and logging
This commit is contained in:
Automated Action
parent
32997150d2
commit
ab87d3c506
230
README.md
230
README.md
@ -1,3 +1,229 @@
|
|||||||
# FastAPI Application
|
# Cryptocurrency Exchange Platform
|
||||||
|
|
||||||
This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
|
A comprehensive cryptocurrency exchange (CEX) platform built with FastAPI, featuring secure wallet management, transaction signing, fiat transfers, and crypto trading capabilities.
|
||||||
|
|
||||||
|
## Features
|
||||||
|
|
||||||
|
### 🔐 Authentication & Security
|
||||||
|
- JWT-based authentication system
|
||||||
|
- Secure password hashing with bcrypt
|
||||||
|
- Rate limiting middleware (100 requests/minute)
|
||||||
|
- Security headers middleware
|
||||||
|
- Input validation and sanitization
|
||||||
|
|
||||||
|
### 💰 Wallet Management
|
||||||
|
- Multi-currency crypto wallet support (BTC, ETH, USDT)
|
||||||
|
- Fiat account management (USD, EUR, GBP)
|
||||||
|
- Local private key generation and encryption
|
||||||
|
- Secure wallet address generation
|
||||||
|
|
||||||
|
### 💸 Transaction Handling
|
||||||
|
- Local transaction signing (no external APIs)
|
||||||
|
- Crypto send/receive functionality
|
||||||
|
- Fiat deposit/withdrawal system
|
||||||
|
- Transaction history and tracking
|
||||||
|
- Fee calculation and management
|
||||||
|
|
||||||
|
### 🏗️ Architecture
|
||||||
|
- Clean, modular codebase structure
|
||||||
|
- SQLAlchemy ORM with Alembic migrations
|
||||||
|
- Pydantic schemas for data validation
|
||||||
|
- Service layer pattern
|
||||||
|
- Comprehensive error handling
|
||||||
|
|
||||||
|
## Tech Stack
|
||||||
|
|
||||||
|
- **Framework**: FastAPI 0.104.1
|
||||||
|
- **Database**: SQLite with SQLAlchemy
|
||||||
|
- **Authentication**: JWT with python-jose
|
||||||
|
- **Cryptography**: ecdsa, bitcoin, web3, cryptography
|
||||||
|
- **Validation**: Pydantic
|
||||||
|
- **Server**: Uvicorn
|
||||||
|
- **Code Quality**: Ruff
|
||||||
|
|
||||||
|
## Project Structure
|
||||||
|
|
||||||
|
```
|
||||||
|
├── app/
|
||||||
|
│ ├── api/ # API endpoints
|
||||||
|
│ │ ├── auth.py # Authentication routes
|
||||||
|
│ │ ├── wallets.py # Wallet management routes
|
||||||
|
│ │ └── transactions.py # Transaction routes
|
||||||
|
│ ├── core/ # Core configuration
|
||||||
|
│ │ ├── config.py # Application settings
|
||||||
|
│ │ ├── security.py # Security utilities
|
||||||
|
│ │ └── middleware.py # Security middleware
|
||||||
|
│ ├── db/ # Database configuration
|
||||||
|
│ │ ├── base.py # SQLAlchemy base
|
||||||
|
│ │ └── session.py # Database session
|
||||||
|
│ ├── models/ # Database models
|
||||||
|
│ │ ├── user.py # User model
|
||||||
|
│ │ ├── wallet.py # Wallet & fiat account models
|
||||||
|
│ │ └── transaction.py # Transaction models
|
||||||
|
│ ├── schemas/ # Pydantic schemas
|
||||||
|
│ ├── services/ # Business logic
|
||||||
|
│ │ ├── auth.py # Authentication service
|
||||||
|
│ │ ├── wallet.py # Wallet service
|
||||||
|
│ │ └── transaction.py # Transaction service
|
||||||
|
│ ├── utils/ # Utilities
|
||||||
|
│ │ ├── crypto.py # Cryptocurrency utilities
|
||||||
|
│ │ └── validation.py # Input validation
|
||||||
|
│ └── storage/ # Application storage
|
||||||
|
│ ├── db/ # SQLite database
|
||||||
|
│ └── logs/ # Application logs
|
||||||
|
├── alembic/ # Database migrations
|
||||||
|
├── requirements.txt # Python dependencies
|
||||||
|
├── main.py # Application entry point
|
||||||
|
└── .env.example # Environment variables template
|
||||||
|
```
|
||||||
|
|
||||||
|
## Installation & Setup
|
||||||
|
|
||||||
|
### 1. Clone the repository
|
||||||
|
```bash
|
||||||
|
git clone <repository-url>
|
||||||
|
cd cryptocurrencyexchangeplatform-vgi538
|
||||||
|
```
|
||||||
|
|
||||||
|
### 2. Install dependencies
|
||||||
|
```bash
|
||||||
|
pip install -r requirements.txt
|
||||||
|
```
|
||||||
|
|
||||||
|
### 3. Environment Configuration
|
||||||
|
```bash
|
||||||
|
cp .env.example .env
|
||||||
|
# Edit .env file with your configuration
|
||||||
|
```
|
||||||
|
|
||||||
|
**Required Environment Variables:**
|
||||||
|
- `SECRET_KEY`: JWT secret key (use a long, random string in production)
|
||||||
|
- `DATABASE_URL`: SQLite database path
|
||||||
|
- `BTC_NETWORK`: Bitcoin network (mainnet/testnet)
|
||||||
|
- `ETH_NETWORK`: Ethereum network (mainnet/goerli)
|
||||||
|
|
||||||
|
### 4. Database Setup
|
||||||
|
```bash
|
||||||
|
# Run migrations
|
||||||
|
alembic upgrade head
|
||||||
|
```
|
||||||
|
|
||||||
|
### 5. Run the application
|
||||||
|
```bash
|
||||||
|
# Development mode
|
||||||
|
uvicorn main:app --host 0.0.0.0 --port 8000 --reload
|
||||||
|
|
||||||
|
# Production mode
|
||||||
|
python main.py
|
||||||
|
```
|
||||||
|
|
||||||
|
## API Documentation
|
||||||
|
|
||||||
|
Once running, access the interactive API documentation:
|
||||||
|
- **Swagger UI**: http://localhost:8000/docs
|
||||||
|
- **ReDoc**: http://localhost:8000/redoc
|
||||||
|
- **OpenAPI JSON**: http://localhost:8000/openapi.json
|
||||||
|
|
||||||
|
## API Endpoints
|
||||||
|
|
||||||
|
### Authentication
|
||||||
|
- `POST /auth/register` - User registration
|
||||||
|
- `POST /auth/login` - User login
|
||||||
|
- `GET /auth/me` - Get current user info
|
||||||
|
|
||||||
|
### Wallets
|
||||||
|
- `POST /wallets/crypto` - Create crypto wallet
|
||||||
|
- `POST /wallets/fiat` - Create fiat account
|
||||||
|
- `GET /wallets/crypto` - Get user's crypto wallets
|
||||||
|
- `GET /wallets/fiat` - Get user's fiat accounts
|
||||||
|
- `GET /wallets/crypto/{wallet_id}` - Get specific crypto wallet
|
||||||
|
- `GET /wallets/fiat/{account_id}` - Get specific fiat account
|
||||||
|
|
||||||
|
### Transactions
|
||||||
|
- `POST /transactions/crypto/send` - Send cryptocurrency
|
||||||
|
- `POST /transactions/fiat/deposit` - Deposit fiat currency
|
||||||
|
- `POST /transactions/fiat/withdraw` - Withdraw fiat currency
|
||||||
|
- `GET /transactions/crypto` - Get crypto transaction history
|
||||||
|
- `GET /transactions/fiat` - Get fiat transaction history
|
||||||
|
- `GET /transactions/crypto/{transaction_id}` - Get specific transaction
|
||||||
|
|
||||||
|
### System
|
||||||
|
- `GET /` - Application info
|
||||||
|
- `GET /health` - Health check endpoint
|
||||||
|
|
||||||
|
## Security Features
|
||||||
|
|
||||||
|
### 🔒 Private Key Management
|
||||||
|
- Private keys are generated locally using secure random number generation
|
||||||
|
- Keys are encrypted using PBKDF2 with SHA-256 and stored encrypted in database
|
||||||
|
- Encryption uses user-specific salts and application secret key
|
||||||
|
|
||||||
|
### 🛡️ Transaction Security
|
||||||
|
- All transactions are signed locally using the wallet's private key
|
||||||
|
- No external APIs required for transaction signing
|
||||||
|
- Transaction data integrity verified through cryptographic signatures
|
||||||
|
|
||||||
|
### 🚦 Rate Limiting
|
||||||
|
- 100 requests per minute per IP address
|
||||||
|
- Automatic cleanup of rate limit storage
|
||||||
|
- Configurable limits per endpoint
|
||||||
|
|
||||||
|
### 🔐 Input Validation
|
||||||
|
- Comprehensive input validation for all endpoints
|
||||||
|
- Email, password, and phone number format validation
|
||||||
|
- Transaction amount and currency validation
|
||||||
|
- Address format validation for different cryptocurrencies
|
||||||
|
|
||||||
|
## Supported Cryptocurrencies
|
||||||
|
|
||||||
|
- **Bitcoin (BTC)**: Testnet and Mainnet support
|
||||||
|
- **Ethereum (ETH)**: Goerli and Mainnet support
|
||||||
|
- **Tether (USDT)**: ERC-20 token on Ethereum network
|
||||||
|
|
||||||
|
## Supported Fiat Currencies
|
||||||
|
|
||||||
|
- USD (US Dollar)
|
||||||
|
- EUR (Euro)
|
||||||
|
- GBP (British Pound)
|
||||||
|
|
||||||
|
## Error Handling
|
||||||
|
|
||||||
|
The application includes comprehensive error handling:
|
||||||
|
- HTTP status codes for different error types
|
||||||
|
- Detailed error messages for debugging
|
||||||
|
- Global exception handler for unhandled errors
|
||||||
|
- Validation errors with specific field information
|
||||||
|
|
||||||
|
## Development
|
||||||
|
|
||||||
|
### Code Quality
|
||||||
|
```bash
|
||||||
|
# Run linting and auto-fix
|
||||||
|
ruff check --fix .
|
||||||
|
```
|
||||||
|
|
||||||
|
### Testing
|
||||||
|
```bash
|
||||||
|
# Run tests (when implemented)
|
||||||
|
pytest
|
||||||
|
```
|
||||||
|
|
||||||
|
## Production Deployment
|
||||||
|
|
||||||
|
### Environment Variables for Production
|
||||||
|
- Set `DEBUG=False`
|
||||||
|
- Use a strong, unique `SECRET_KEY`
|
||||||
|
- Configure proper database URL
|
||||||
|
- Set appropriate CORS origins
|
||||||
|
- Use production cryptocurrency networks
|
||||||
|
|
||||||
|
### Security Considerations
|
||||||
|
- Use HTTPS in production
|
||||||
|
- Implement proper key management
|
||||||
|
- Set up database backups
|
||||||
|
- Monitor transaction activity
|
||||||
|
- Implement additional KYC/AML compliance
|
||||||
|
|
||||||
|
## License
|
||||||
|
|
||||||
|
This project is developed for educational and development purposes. Ensure compliance with financial regulations in your jurisdiction before production use.
|
||||||
|
|||||||
41
alembic.ini
Normal file
41
alembic.ini
Normal file
@ -0,0 +1,41 @@
|
|||||||
|
[alembic]
|
||||||
|
script_location = alembic
|
||||||
|
prepend_sys_path = .
|
||||||
|
version_path_separator = os
|
||||||
|
sqlalchemy.url = sqlite:////app/storage/db/db.sqlite
|
||||||
|
|
||||||
|
[post_write_hooks]
|
||||||
|
|
||||||
|
[loggers]
|
||||||
|
keys = root,sqlalchemy,alembic
|
||||||
|
|
||||||
|
[handlers]
|
||||||
|
keys = console
|
||||||
|
|
||||||
|
[formatters]
|
||||||
|
keys = generic
|
||||||
|
|
||||||
|
[logger_root]
|
||||||
|
level = WARN
|
||||||
|
handlers = console
|
||||||
|
qualname =
|
||||||
|
|
||||||
|
[logger_sqlalchemy]
|
||||||
|
level = WARN
|
||||||
|
handlers =
|
||||||
|
qualname = sqlalchemy.engine
|
||||||
|
|
||||||
|
[logger_alembic]
|
||||||
|
level = INFO
|
||||||
|
handlers =
|
||||||
|
qualname = alembic
|
||||||
|
|
||||||
|
[handler_console]
|
||||||
|
class = StreamHandler
|
||||||
|
args = (sys.stderr,)
|
||||||
|
level = NOTSET
|
||||||
|
formatter = generic
|
||||||
|
|
||||||
|
[formatter_generic]
|
||||||
|
format = %(levelname)-5.5s [%(name)s] %(message)s
|
||||||
|
datefmt = %H:%M:%S
|
||||||
57
alembic/env.py
Normal file
57
alembic/env.py
Normal file
@ -0,0 +1,57 @@
|
|||||||
|
from logging.config import fileConfig
|
||||||
|
from sqlalchemy import engine_from_config
|
||||||
|
from sqlalchemy import pool
|
||||||
|
from alembic import context
|
||||||
|
import sys
|
||||||
|
import os
|
||||||
|
|
||||||
|
# Add the project root to Python path
|
||||||
|
sys.path.append(os.path.dirname(os.path.dirname(__file__)))
|
||||||
|
|
||||||
|
from app.db.base import Base
|
||||||
|
# Import models for Alembic to detect schema changes
|
||||||
|
from app.models.user import User # noqa: F401
|
||||||
|
from app.models.wallet import Wallet, FiatAccount # noqa: F401
|
||||||
|
from app.models.transaction import Transaction, FiatTransaction # noqa: F401
|
||||||
|
|
||||||
|
config = context.config
|
||||||
|
|
||||||
|
if config.config_file_name is not None:
|
||||||
|
fileConfig(config.config_file_name)
|
||||||
|
|
||||||
|
target_metadata = Base.metadata
|
||||||
|
|
||||||
|
|
||||||
|
def run_migrations_offline() -> None:
|
||||||
|
url = config.get_main_option("sqlalchemy.url")
|
||||||
|
context.configure(
|
||||||
|
url=url,
|
||||||
|
target_metadata=target_metadata,
|
||||||
|
literal_binds=True,
|
||||||
|
dialect_opts={"paramstyle": "named"},
|
||||||
|
)
|
||||||
|
|
||||||
|
with context.begin_transaction():
|
||||||
|
context.run_migrations()
|
||||||
|
|
||||||
|
|
||||||
|
def run_migrations_online() -> None:
|
||||||
|
connectable = engine_from_config(
|
||||||
|
config.get_section(config.config_ini_section),
|
||||||
|
prefix="sqlalchemy.",
|
||||||
|
poolclass=pool.NullPool,
|
||||||
|
)
|
||||||
|
|
||||||
|
with connectable.connect() as connection:
|
||||||
|
context.configure(
|
||||||
|
connection=connection, target_metadata=target_metadata
|
||||||
|
)
|
||||||
|
|
||||||
|
with context.begin_transaction():
|
||||||
|
context.run_migrations()
|
||||||
|
|
||||||
|
|
||||||
|
if context.is_offline_mode():
|
||||||
|
run_migrations_offline()
|
||||||
|
else:
|
||||||
|
run_migrations_online()
|
||||||
24
alembic/script.py.mako
Normal file
24
alembic/script.py.mako
Normal file
@ -0,0 +1,24 @@
|
|||||||
|
"""${message}
|
||||||
|
|
||||||
|
Revision ID: ${up_revision}
|
||||||
|
Revises: ${down_revision | comma,n}
|
||||||
|
Create Date: ${create_date}
|
||||||
|
|
||||||
|
"""
|
||||||
|
from alembic import op
|
||||||
|
import sqlalchemy as sa
|
||||||
|
${imports if imports else ""}
|
||||||
|
|
||||||
|
# revision identifiers, used by Alembic.
|
||||||
|
revision = ${repr(up_revision)}
|
||||||
|
down_revision = ${repr(down_revision)}
|
||||||
|
branch_labels = ${repr(branch_labels)}
|
||||||
|
depends_on = ${repr(depends_on)}
|
||||||
|
|
||||||
|
|
||||||
|
def upgrade() -> None:
|
||||||
|
${upgrades if upgrades else "pass"}
|
||||||
|
|
||||||
|
|
||||||
|
def downgrade() -> None:
|
||||||
|
${downgrades if downgrades else "pass"}
|
||||||
127
alembic/versions/001_initial_migration.py
Normal file
127
alembic/versions/001_initial_migration.py
Normal file
@ -0,0 +1,127 @@
|
|||||||
|
"""Initial migration
|
||||||
|
|
||||||
|
Revision ID: 001
|
||||||
|
Revises:
|
||||||
|
Create Date: 2025-06-20 12:00:00.000000
|
||||||
|
|
||||||
|
"""
|
||||||
|
from alembic import op
|
||||||
|
import sqlalchemy as sa
|
||||||
|
|
||||||
|
# revision identifiers, used by Alembic.
|
||||||
|
revision = '001'
|
||||||
|
down_revision = None
|
||||||
|
branch_labels = None
|
||||||
|
depends_on = None
|
||||||
|
|
||||||
|
|
||||||
|
def upgrade() -> None:
|
||||||
|
# Create users table
|
||||||
|
op.create_table('users',
|
||||||
|
sa.Column('id', sa.Integer(), nullable=False),
|
||||||
|
sa.Column('email', sa.String(), nullable=False),
|
||||||
|
sa.Column('hashed_password', sa.String(), nullable=False),
|
||||||
|
sa.Column('full_name', sa.String(), nullable=False),
|
||||||
|
sa.Column('is_active', sa.Boolean(), nullable=True),
|
||||||
|
sa.Column('is_verified', sa.Boolean(), nullable=True),
|
||||||
|
sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
|
||||||
|
sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
|
||||||
|
sa.Column('kyc_level', sa.Integer(), nullable=True),
|
||||||
|
sa.Column('phone_number', sa.String(), nullable=True),
|
||||||
|
sa.Column('country', sa.String(), nullable=True),
|
||||||
|
sa.PrimaryKeyConstraint('id')
|
||||||
|
)
|
||||||
|
op.create_index(op.f('ix_users_email'), 'users', ['email'], unique=True)
|
||||||
|
op.create_index(op.f('ix_users_id'), 'users', ['id'], unique=False)
|
||||||
|
|
||||||
|
# Create wallets table
|
||||||
|
op.create_table('wallets',
|
||||||
|
sa.Column('id', sa.Integer(), nullable=False),
|
||||||
|
sa.Column('user_id', sa.Integer(), nullable=False),
|
||||||
|
sa.Column('currency', sa.String(), nullable=False),
|
||||||
|
sa.Column('address', sa.String(), nullable=False),
|
||||||
|
sa.Column('private_key_encrypted', sa.String(), nullable=False),
|
||||||
|
sa.Column('balance', sa.Float(), nullable=True),
|
||||||
|
sa.Column('is_active', sa.Boolean(), nullable=True),
|
||||||
|
sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
|
||||||
|
sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
|
||||||
|
sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
|
||||||
|
sa.PrimaryKeyConstraint('id')
|
||||||
|
)
|
||||||
|
op.create_index(op.f('ix_wallets_address'), 'wallets', ['address'], unique=True)
|
||||||
|
op.create_index(op.f('ix_wallets_id'), 'wallets', ['id'], unique=False)
|
||||||
|
|
||||||
|
# Create fiat_accounts table
|
||||||
|
op.create_table('fiat_accounts',
|
||||||
|
sa.Column('id', sa.Integer(), nullable=False),
|
||||||
|
sa.Column('user_id', sa.Integer(), nullable=False),
|
||||||
|
sa.Column('currency', sa.String(), nullable=False),
|
||||||
|
sa.Column('balance', sa.Float(), nullable=True),
|
||||||
|
sa.Column('is_active', sa.Boolean(), nullable=True),
|
||||||
|
sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
|
||||||
|
sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
|
||||||
|
sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
|
||||||
|
sa.PrimaryKeyConstraint('id')
|
||||||
|
)
|
||||||
|
op.create_index(op.f('ix_fiat_accounts_id'), 'fiat_accounts', ['id'], unique=False)
|
||||||
|
|
||||||
|
# Create transactions table
|
||||||
|
op.create_table('transactions',
|
||||||
|
sa.Column('id', sa.Integer(), nullable=False),
|
||||||
|
sa.Column('user_id', sa.Integer(), nullable=False),
|
||||||
|
sa.Column('from_wallet_id', sa.Integer(), nullable=True),
|
||||||
|
sa.Column('to_wallet_id', sa.Integer(), nullable=True),
|
||||||
|
sa.Column('transaction_hash', sa.String(), nullable=True),
|
||||||
|
sa.Column('amount', sa.Float(), nullable=False),
|
||||||
|
sa.Column('fee', sa.Float(), nullable=True),
|
||||||
|
sa.Column('currency', sa.String(), nullable=False),
|
||||||
|
sa.Column('transaction_type', sa.Enum('SEND', 'RECEIVE', 'DEPOSIT', 'WITHDRAWAL', name='transactiontype'), nullable=False),
|
||||||
|
sa.Column('status', sa.Enum('PENDING', 'CONFIRMED', 'FAILED', 'CANCELLED', name='transactionstatus'), nullable=True),
|
||||||
|
sa.Column('from_address', sa.String(), nullable=True),
|
||||||
|
sa.Column('to_address', sa.String(), nullable=False),
|
||||||
|
sa.Column('block_number', sa.Integer(), nullable=True),
|
||||||
|
sa.Column('confirmations', sa.Integer(), nullable=True),
|
||||||
|
sa.Column('notes', sa.Text(), nullable=True),
|
||||||
|
sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
|
||||||
|
sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
|
||||||
|
sa.ForeignKeyConstraint(['from_wallet_id'], ['wallets.id'], ),
|
||||||
|
sa.ForeignKeyConstraint(['to_wallet_id'], ['wallets.id'], ),
|
||||||
|
sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
|
||||||
|
sa.PrimaryKeyConstraint('id')
|
||||||
|
)
|
||||||
|
op.create_index(op.f('ix_transactions_id'), 'transactions', ['id'], unique=False)
|
||||||
|
op.create_index(op.f('ix_transactions_transaction_hash'), 'transactions', ['transaction_hash'], unique=True)
|
||||||
|
|
||||||
|
# Create fiat_transactions table
|
||||||
|
op.create_table('fiat_transactions',
|
||||||
|
sa.Column('id', sa.Integer(), nullable=False),
|
||||||
|
sa.Column('account_id', sa.Integer(), nullable=False),
|
||||||
|
sa.Column('amount', sa.Float(), nullable=False),
|
||||||
|
sa.Column('currency', sa.String(), nullable=False),
|
||||||
|
sa.Column('transaction_type', sa.Enum('SEND', 'RECEIVE', 'DEPOSIT', 'WITHDRAWAL', name='transactiontype'), nullable=False),
|
||||||
|
sa.Column('status', sa.Enum('PENDING', 'CONFIRMED', 'FAILED', 'CANCELLED', name='transactionstatus'), nullable=True),
|
||||||
|
sa.Column('bank_reference', sa.String(), nullable=True),
|
||||||
|
sa.Column('payment_method', sa.String(), nullable=True),
|
||||||
|
sa.Column('notes', sa.Text(), nullable=True),
|
||||||
|
sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
|
||||||
|
sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
|
||||||
|
sa.ForeignKeyConstraint(['account_id'], ['fiat_accounts.id'], ),
|
||||||
|
sa.PrimaryKeyConstraint('id')
|
||||||
|
)
|
||||||
|
op.create_index(op.f('ix_fiat_transactions_id'), 'fiat_transactions', ['id'], unique=False)
|
||||||
|
|
||||||
|
|
||||||
|
def downgrade() -> None:
|
||||||
|
op.drop_index(op.f('ix_fiat_transactions_id'), table_name='fiat_transactions')
|
||||||
|
op.drop_table('fiat_transactions')
|
||||||
|
op.drop_index(op.f('ix_transactions_transaction_hash'), table_name='transactions')
|
||||||
|
op.drop_index(op.f('ix_transactions_id'), table_name='transactions')
|
||||||
|
op.drop_table('transactions')
|
||||||
|
op.drop_index(op.f('ix_fiat_accounts_id'), table_name='fiat_accounts')
|
||||||
|
op.drop_table('fiat_accounts')
|
||||||
|
op.drop_index(op.f('ix_wallets_id'), table_name='wallets')
|
||||||
|
op.drop_index(op.f('ix_wallets_address'), table_name='wallets')
|
||||||
|
op.drop_table('wallets')
|
||||||
|
op.drop_index(op.f('ix_users_id'), table_name='users')
|
||||||
|
op.drop_index(op.f('ix_users_email'), table_name='users')
|
||||||
|
op.drop_table('users')
|
||||||
0
app/__init__.py
Normal file
0
app/__init__.py
Normal file
0
app/api/__init__.py
Normal file
0
app/api/__init__.py
Normal file
30
app/api/auth.py
Normal file
30
app/api/auth.py
Normal file
@ -0,0 +1,30 @@
|
|||||||
|
from fastapi import APIRouter, Depends
|
||||||
|
from sqlalchemy.orm import Session
|
||||||
|
from app.schemas.user import UserCreate, UserResponse, UserLogin, Token
|
||||||
|
from app.services.auth import AuthService, get_current_user
|
||||||
|
from app.core.security import create_access_token
|
||||||
|
from app.db.session import get_db
|
||||||
|
from app.models.user import User
|
||||||
|
|
||||||
|
router = APIRouter(prefix="/auth", tags=["Authentication"])
|
||||||
|
|
||||||
|
|
||||||
|
@router.post("/register", response_model=UserResponse)
|
||||||
|
def register(user_data: UserCreate, db: Session = Depends(get_db)):
|
||||||
|
auth_service = AuthService(db)
|
||||||
|
user = auth_service.create_user(user_data)
|
||||||
|
return user
|
||||||
|
|
||||||
|
|
||||||
|
@router.post("/login", response_model=Token)
|
||||||
|
def login(login_data: UserLogin, db: Session = Depends(get_db)):
|
||||||
|
auth_service = AuthService(db)
|
||||||
|
user = auth_service.authenticate_user(login_data)
|
||||||
|
|
||||||
|
access_token = create_access_token(data={"sub": user.email})
|
||||||
|
return {"access_token": access_token, "token_type": "bearer"}
|
||||||
|
|
||||||
|
|
||||||
|
@router.get("/me", response_model=UserResponse)
|
||||||
|
def get_current_user_info(current_user: User = Depends(get_current_user)):
|
||||||
|
return current_user
|
||||||
83
app/api/transactions.py
Normal file
83
app/api/transactions.py
Normal file
@ -0,0 +1,83 @@
|
|||||||
|
from fastapi import APIRouter, Depends, HTTPException, status, Query
|
||||||
|
from sqlalchemy.orm import Session
|
||||||
|
from typing import List
|
||||||
|
from app.schemas.transaction import TransactionCreate, TransactionResponse, FiatTransactionCreate, FiatTransactionResponse
|
||||||
|
from app.services.transaction import TransactionService
|
||||||
|
from app.services.auth import get_current_user
|
||||||
|
from app.db.session import get_db
|
||||||
|
from app.models.user import User
|
||||||
|
|
||||||
|
router = APIRouter(prefix="/transactions", tags=["Transactions"])
|
||||||
|
|
||||||
|
|
||||||
|
@router.post("/crypto/send", response_model=TransactionResponse)
|
||||||
|
def send_crypto(
|
||||||
|
transaction_data: TransactionCreate,
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
transaction_service = TransactionService(db)
|
||||||
|
transaction = transaction_service.send_crypto(current_user, transaction_data)
|
||||||
|
return transaction
|
||||||
|
|
||||||
|
|
||||||
|
@router.post("/fiat/deposit", response_model=FiatTransactionResponse)
|
||||||
|
def deposit_fiat(
|
||||||
|
transaction_data: FiatTransactionCreate,
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
transaction_service = TransactionService(db)
|
||||||
|
transaction = transaction_service.deposit_fiat(current_user, transaction_data)
|
||||||
|
return transaction
|
||||||
|
|
||||||
|
|
||||||
|
@router.post("/fiat/withdraw", response_model=FiatTransactionResponse)
|
||||||
|
def withdraw_fiat(
|
||||||
|
transaction_data: FiatTransactionCreate,
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
transaction_service = TransactionService(db)
|
||||||
|
transaction = transaction_service.withdraw_fiat(current_user, transaction_data)
|
||||||
|
return transaction
|
||||||
|
|
||||||
|
|
||||||
|
@router.get("/crypto", response_model=List[TransactionResponse])
|
||||||
|
def get_crypto_transactions(
|
||||||
|
limit: int = Query(50, ge=1, le=100),
|
||||||
|
offset: int = Query(0, ge=0),
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
transaction_service = TransactionService(db)
|
||||||
|
transactions = transaction_service.get_user_transactions(current_user, limit, offset)
|
||||||
|
return transactions
|
||||||
|
|
||||||
|
|
||||||
|
@router.get("/fiat", response_model=List[FiatTransactionResponse])
|
||||||
|
def get_fiat_transactions(
|
||||||
|
limit: int = Query(50, ge=1, le=100),
|
||||||
|
offset: int = Query(0, ge=0),
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
transaction_service = TransactionService(db)
|
||||||
|
transactions = transaction_service.get_user_fiat_transactions(current_user, limit, offset)
|
||||||
|
return transactions
|
||||||
|
|
||||||
|
|
||||||
|
@router.get("/crypto/{transaction_id}", response_model=TransactionResponse)
|
||||||
|
def get_crypto_transaction(
|
||||||
|
transaction_id: int,
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
transaction_service = TransactionService(db)
|
||||||
|
transaction = transaction_service.get_transaction_by_id(transaction_id, current_user)
|
||||||
|
if not transaction:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_404_NOT_FOUND,
|
||||||
|
detail="Transaction not found"
|
||||||
|
)
|
||||||
|
return transaction
|
||||||
84
app/api/wallets.py
Normal file
84
app/api/wallets.py
Normal file
@ -0,0 +1,84 @@
|
|||||||
|
from fastapi import APIRouter, Depends, HTTPException, status
|
||||||
|
from sqlalchemy.orm import Session
|
||||||
|
from typing import List
|
||||||
|
from app.schemas.wallet import WalletCreate, WalletResponse, FiatAccountCreate, FiatAccountResponse
|
||||||
|
from app.services.wallet import WalletService
|
||||||
|
from app.services.auth import get_current_user
|
||||||
|
from app.db.session import get_db
|
||||||
|
from app.models.user import User
|
||||||
|
|
||||||
|
router = APIRouter(prefix="/wallets", tags=["Wallets"])
|
||||||
|
|
||||||
|
|
||||||
|
@router.post("/crypto", response_model=WalletResponse)
|
||||||
|
def create_crypto_wallet(
|
||||||
|
wallet_data: WalletCreate,
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
wallet_service = WalletService(db)
|
||||||
|
wallet = wallet_service.create_crypto_wallet(current_user, wallet_data)
|
||||||
|
return wallet
|
||||||
|
|
||||||
|
|
||||||
|
@router.post("/fiat", response_model=FiatAccountResponse)
|
||||||
|
def create_fiat_account(
|
||||||
|
account_data: FiatAccountCreate,
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
wallet_service = WalletService(db)
|
||||||
|
account = wallet_service.create_fiat_account(current_user, account_data)
|
||||||
|
return account
|
||||||
|
|
||||||
|
|
||||||
|
@router.get("/crypto", response_model=List[WalletResponse])
|
||||||
|
def get_crypto_wallets(
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
wallet_service = WalletService(db)
|
||||||
|
wallets = wallet_service.get_user_wallets(current_user)
|
||||||
|
return wallets
|
||||||
|
|
||||||
|
|
||||||
|
@router.get("/fiat", response_model=List[FiatAccountResponse])
|
||||||
|
def get_fiat_accounts(
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
wallet_service = WalletService(db)
|
||||||
|
accounts = wallet_service.get_user_fiat_accounts(current_user)
|
||||||
|
return accounts
|
||||||
|
|
||||||
|
|
||||||
|
@router.get("/crypto/{wallet_id}", response_model=WalletResponse)
|
||||||
|
def get_crypto_wallet(
|
||||||
|
wallet_id: int,
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
wallet_service = WalletService(db)
|
||||||
|
wallet = wallet_service.get_wallet_by_id(wallet_id, current_user)
|
||||||
|
if not wallet:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_404_NOT_FOUND,
|
||||||
|
detail="Wallet not found"
|
||||||
|
)
|
||||||
|
return wallet
|
||||||
|
|
||||||
|
|
||||||
|
@router.get("/fiat/{account_id}", response_model=FiatAccountResponse)
|
||||||
|
def get_fiat_account(
|
||||||
|
account_id: int,
|
||||||
|
current_user: User = Depends(get_current_user),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
):
|
||||||
|
wallet_service = WalletService(db)
|
||||||
|
account = wallet_service.get_fiat_account_by_id(account_id, current_user)
|
||||||
|
if not account:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_404_NOT_FOUND,
|
||||||
|
detail="Fiat account not found"
|
||||||
|
)
|
||||||
|
return account
|
||||||
0
app/core/__init__.py
Normal file
0
app/core/__init__.py
Normal file
35
app/core/config.py
Normal file
35
app/core/config.py
Normal file
@ -0,0 +1,35 @@
|
|||||||
|
from pydantic_settings import BaseSettings
|
||||||
|
import os
|
||||||
|
|
||||||
|
|
||||||
|
class Settings(BaseSettings):
|
||||||
|
app_name: str = "Cryptocurrency Exchange Platform"
|
||||||
|
app_version: str = "1.0.0"
|
||||||
|
debug: bool = True
|
||||||
|
|
||||||
|
# Security
|
||||||
|
secret_key: str = os.getenv("SECRET_KEY", "your-secret-key-change-in-production")
|
||||||
|
algorithm: str = "HS256"
|
||||||
|
access_token_expire_minutes: int = 30
|
||||||
|
|
||||||
|
# Database
|
||||||
|
database_url: str = "sqlite:////app/storage/db/db.sqlite"
|
||||||
|
|
||||||
|
# CORS
|
||||||
|
allowed_origins: list = ["*"]
|
||||||
|
|
||||||
|
# Crypto settings
|
||||||
|
btc_network: str = "testnet" # mainnet or testnet
|
||||||
|
eth_network: str = "goerli" # mainnet or goerli
|
||||||
|
|
||||||
|
# Fiat settings
|
||||||
|
min_fiat_deposit: float = 10.0
|
||||||
|
max_fiat_deposit: float = 10000.0
|
||||||
|
min_fiat_withdrawal: float = 10.0
|
||||||
|
max_fiat_withdrawal: float = 5000.0
|
||||||
|
|
||||||
|
class Config:
|
||||||
|
env_file = ".env"
|
||||||
|
|
||||||
|
|
||||||
|
settings = Settings()
|
||||||
72
app/core/middleware.py
Normal file
72
app/core/middleware.py
Normal file
@ -0,0 +1,72 @@
|
|||||||
|
from fastapi import Request, status
|
||||||
|
from fastapi.responses import JSONResponse
|
||||||
|
from starlette.middleware.base import BaseHTTPMiddleware
|
||||||
|
import time
|
||||||
|
import logging
|
||||||
|
from typing import Dict
|
||||||
|
from collections import defaultdict
|
||||||
|
|
||||||
|
# Configure logging
|
||||||
|
logging.basicConfig(level=logging.INFO)
|
||||||
|
logger = logging.getLogger(__name__)
|
||||||
|
|
||||||
|
# Rate limiting storage
|
||||||
|
rate_limit_storage: Dict[str, Dict] = defaultdict(lambda: {"count": 0, "reset_time": 0})
|
||||||
|
|
||||||
|
|
||||||
|
class RateLimitMiddleware(BaseHTTPMiddleware):
|
||||||
|
def __init__(self, app, calls: int = 100, period: int = 60):
|
||||||
|
super().__init__(app)
|
||||||
|
self.calls = calls
|
||||||
|
self.period = period
|
||||||
|
|
||||||
|
async def dispatch(self, request: Request, call_next):
|
||||||
|
client_ip = request.client.host
|
||||||
|
current_time = time.time()
|
||||||
|
|
||||||
|
# Clean up old entries
|
||||||
|
if current_time > rate_limit_storage[client_ip]["reset_time"]:
|
||||||
|
rate_limit_storage[client_ip] = {"count": 0, "reset_time": current_time + self.period}
|
||||||
|
|
||||||
|
# Check rate limit
|
||||||
|
if rate_limit_storage[client_ip]["count"] >= self.calls:
|
||||||
|
return JSONResponse(
|
||||||
|
status_code=status.HTTP_429_TOO_MANY_REQUESTS,
|
||||||
|
content={"detail": "Rate limit exceeded"}
|
||||||
|
)
|
||||||
|
|
||||||
|
# Increment counter
|
||||||
|
rate_limit_storage[client_ip]["count"] += 1
|
||||||
|
|
||||||
|
response = await call_next(request)
|
||||||
|
return response
|
||||||
|
|
||||||
|
|
||||||
|
class SecurityHeadersMiddleware(BaseHTTPMiddleware):
|
||||||
|
async def dispatch(self, request: Request, call_next):
|
||||||
|
response = await call_next(request)
|
||||||
|
|
||||||
|
# Add security headers
|
||||||
|
response.headers["X-Content-Type-Options"] = "nosniff"
|
||||||
|
response.headers["X-Frame-Options"] = "DENY"
|
||||||
|
response.headers["X-XSS-Protection"] = "1; mode=block"
|
||||||
|
response.headers["Strict-Transport-Security"] = "max-age=31536000; includeSubDomains"
|
||||||
|
response.headers["Referrer-Policy"] = "strict-origin-when-cross-origin"
|
||||||
|
|
||||||
|
return response
|
||||||
|
|
||||||
|
|
||||||
|
class LoggingMiddleware(BaseHTTPMiddleware):
|
||||||
|
async def dispatch(self, request: Request, call_next):
|
||||||
|
start_time = time.time()
|
||||||
|
|
||||||
|
# Log request
|
||||||
|
logger.info(f"Request: {request.method} {request.url}")
|
||||||
|
|
||||||
|
response = await call_next(request)
|
||||||
|
|
||||||
|
# Log response
|
||||||
|
process_time = time.time() - start_time
|
||||||
|
logger.info(f"Response: {response.status_code} - {process_time:.4f}s")
|
||||||
|
|
||||||
|
return response
|
||||||
37
app/core/security.py
Normal file
37
app/core/security.py
Normal file
@ -0,0 +1,37 @@
|
|||||||
|
from datetime import datetime, timedelta
|
||||||
|
from typing import Optional
|
||||||
|
from jose import JWTError, jwt
|
||||||
|
from passlib.context import CryptContext
|
||||||
|
from app.core.config import settings
|
||||||
|
|
||||||
|
pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
|
||||||
|
|
||||||
|
|
||||||
|
def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
|
||||||
|
to_encode = data.copy()
|
||||||
|
if expires_delta:
|
||||||
|
expire = datetime.utcnow() + expires_delta
|
||||||
|
else:
|
||||||
|
expire = datetime.utcnow() + timedelta(minutes=settings.access_token_expire_minutes)
|
||||||
|
to_encode.update({"exp": expire})
|
||||||
|
encoded_jwt = jwt.encode(to_encode, settings.secret_key, algorithm=settings.algorithm)
|
||||||
|
return encoded_jwt
|
||||||
|
|
||||||
|
|
||||||
|
def verify_token(token: str):
|
||||||
|
try:
|
||||||
|
payload = jwt.decode(token, settings.secret_key, algorithms=[settings.algorithm])
|
||||||
|
email: str = payload.get("sub")
|
||||||
|
if email is None:
|
||||||
|
return None
|
||||||
|
return email
|
||||||
|
except JWTError:
|
||||||
|
return None
|
||||||
|
|
||||||
|
|
||||||
|
def verify_password(plain_password: str, hashed_password: str) -> bool:
|
||||||
|
return pwd_context.verify(plain_password, hashed_password)
|
||||||
|
|
||||||
|
|
||||||
|
def get_password_hash(password: str) -> str:
|
||||||
|
return pwd_context.hash(password)
|
||||||
0
app/db/__init__.py
Normal file
0
app/db/__init__.py
Normal file
3
app/db/base.py
Normal file
3
app/db/base.py
Normal file
@ -0,0 +1,3 @@
|
|||||||
|
from sqlalchemy.ext.declarative import declarative_base
|
||||||
|
|
||||||
|
Base = declarative_base()
|
||||||
24
app/db/session.py
Normal file
24
app/db/session.py
Normal file
@ -0,0 +1,24 @@
|
|||||||
|
from sqlalchemy import create_engine
|
||||||
|
from sqlalchemy.orm import sessionmaker
|
||||||
|
from pathlib import Path
|
||||||
|
|
||||||
|
# Ensure storage directory exists
|
||||||
|
DB_DIR = Path("/app/storage/db")
|
||||||
|
DB_DIR.mkdir(parents=True, exist_ok=True)
|
||||||
|
|
||||||
|
SQLALCHEMY_DATABASE_URL = f"sqlite:///{DB_DIR}/db.sqlite"
|
||||||
|
|
||||||
|
engine = create_engine(
|
||||||
|
SQLALCHEMY_DATABASE_URL,
|
||||||
|
connect_args={"check_same_thread": False}
|
||||||
|
)
|
||||||
|
|
||||||
|
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
|
||||||
|
|
||||||
|
|
||||||
|
def get_db():
|
||||||
|
db = SessionLocal()
|
||||||
|
try:
|
||||||
|
yield db
|
||||||
|
finally:
|
||||||
|
db.close()
|
||||||
13
app/models/__init__.py
Normal file
13
app/models/__init__.py
Normal file
@ -0,0 +1,13 @@
|
|||||||
|
from app.models.user import User
|
||||||
|
from app.models.wallet import Wallet, FiatAccount
|
||||||
|
from app.models.transaction import Transaction, FiatTransaction, TransactionStatus, TransactionType
|
||||||
|
|
||||||
|
__all__ = [
|
||||||
|
"User",
|
||||||
|
"Wallet",
|
||||||
|
"FiatAccount",
|
||||||
|
"Transaction",
|
||||||
|
"FiatTransaction",
|
||||||
|
"TransactionStatus",
|
||||||
|
"TransactionType"
|
||||||
|
]
|
||||||
73
app/models/transaction.py
Normal file
73
app/models/transaction.py
Normal file
@ -0,0 +1,73 @@
|
|||||||
|
from sqlalchemy import Column, Integer, String, Float, DateTime, ForeignKey, Text, Enum
|
||||||
|
from sqlalchemy.sql import func
|
||||||
|
from sqlalchemy.orm import relationship
|
||||||
|
import enum
|
||||||
|
from app.db.base import Base
|
||||||
|
|
||||||
|
|
||||||
|
class TransactionStatus(enum.Enum):
|
||||||
|
PENDING = "pending"
|
||||||
|
CONFIRMED = "confirmed"
|
||||||
|
FAILED = "failed"
|
||||||
|
CANCELLED = "cancelled"
|
||||||
|
|
||||||
|
|
||||||
|
class TransactionType(enum.Enum):
|
||||||
|
SEND = "send"
|
||||||
|
RECEIVE = "receive"
|
||||||
|
DEPOSIT = "deposit"
|
||||||
|
WITHDRAWAL = "withdrawal"
|
||||||
|
|
||||||
|
|
||||||
|
class Transaction(Base):
|
||||||
|
__tablename__ = "transactions"
|
||||||
|
|
||||||
|
id = Column(Integer, primary_key=True, index=True)
|
||||||
|
user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
|
||||||
|
from_wallet_id = Column(Integer, ForeignKey("wallets.id"), nullable=True)
|
||||||
|
to_wallet_id = Column(Integer, ForeignKey("wallets.id"), nullable=True)
|
||||||
|
|
||||||
|
transaction_hash = Column(String, unique=True, nullable=True)
|
||||||
|
amount = Column(Float, nullable=False)
|
||||||
|
fee = Column(Float, default=0.0)
|
||||||
|
currency = Column(String, nullable=False)
|
||||||
|
|
||||||
|
transaction_type = Column(Enum(TransactionType), nullable=False)
|
||||||
|
status = Column(Enum(TransactionStatus), default=TransactionStatus.PENDING)
|
||||||
|
|
||||||
|
from_address = Column(String, nullable=True)
|
||||||
|
to_address = Column(String, nullable=False)
|
||||||
|
|
||||||
|
block_number = Column(Integer, nullable=True)
|
||||||
|
confirmations = Column(Integer, default=0)
|
||||||
|
|
||||||
|
notes = Column(Text, nullable=True)
|
||||||
|
created_at = Column(DateTime(timezone=True), server_default=func.now())
|
||||||
|
updated_at = Column(DateTime(timezone=True), onupdate=func.now())
|
||||||
|
|
||||||
|
# Relationships
|
||||||
|
user = relationship("User", back_populates="transactions")
|
||||||
|
from_wallet = relationship("Wallet", foreign_keys=[from_wallet_id], back_populates="transactions_sent")
|
||||||
|
to_wallet = relationship("Wallet", foreign_keys=[to_wallet_id], back_populates="transactions_received")
|
||||||
|
|
||||||
|
|
||||||
|
class FiatTransaction(Base):
|
||||||
|
__tablename__ = "fiat_transactions"
|
||||||
|
|
||||||
|
id = Column(Integer, primary_key=True, index=True)
|
||||||
|
account_id = Column(Integer, ForeignKey("fiat_accounts.id"), nullable=False)
|
||||||
|
|
||||||
|
amount = Column(Float, nullable=False)
|
||||||
|
currency = Column(String, nullable=False)
|
||||||
|
transaction_type = Column(Enum(TransactionType), nullable=False)
|
||||||
|
status = Column(Enum(TransactionStatus), default=TransactionStatus.PENDING)
|
||||||
|
|
||||||
|
bank_reference = Column(String, nullable=True)
|
||||||
|
payment_method = Column(String, nullable=True) # bank_transfer, card, etc.
|
||||||
|
|
||||||
|
notes = Column(Text, nullable=True)
|
||||||
|
created_at = Column(DateTime(timezone=True), server_default=func.now())
|
||||||
|
updated_at = Column(DateTime(timezone=True), onupdate=func.now())
|
||||||
|
|
||||||
|
# Relationships
|
||||||
|
account = relationship("FiatAccount", back_populates="deposits")
|
||||||
27
app/models/user.py
Normal file
27
app/models/user.py
Normal file
@ -0,0 +1,27 @@
|
|||||||
|
from sqlalchemy import Column, Integer, String, Boolean, DateTime
|
||||||
|
from sqlalchemy.sql import func
|
||||||
|
from sqlalchemy.orm import relationship
|
||||||
|
from app.db.base import Base
|
||||||
|
|
||||||
|
|
||||||
|
class User(Base):
|
||||||
|
__tablename__ = "users"
|
||||||
|
|
||||||
|
id = Column(Integer, primary_key=True, index=True)
|
||||||
|
email = Column(String, unique=True, index=True, nullable=False)
|
||||||
|
hashed_password = Column(String, nullable=False)
|
||||||
|
full_name = Column(String, nullable=False)
|
||||||
|
is_active = Column(Boolean, default=True)
|
||||||
|
is_verified = Column(Boolean, default=False)
|
||||||
|
created_at = Column(DateTime(timezone=True), server_default=func.now())
|
||||||
|
updated_at = Column(DateTime(timezone=True), onupdate=func.now())
|
||||||
|
|
||||||
|
# KYC fields
|
||||||
|
kyc_level = Column(Integer, default=0) # 0: none, 1: basic, 2: advanced
|
||||||
|
phone_number = Column(String, nullable=True)
|
||||||
|
country = Column(String, nullable=True)
|
||||||
|
|
||||||
|
# Relationships
|
||||||
|
wallets = relationship("Wallet", back_populates="owner")
|
||||||
|
fiat_accounts = relationship("FiatAccount", back_populates="owner")
|
||||||
|
transactions = relationship("Transaction", back_populates="user")
|
||||||
39
app/models/wallet.py
Normal file
39
app/models/wallet.py
Normal file
@ -0,0 +1,39 @@
|
|||||||
|
from sqlalchemy import Column, Integer, String, Float, Boolean, DateTime, ForeignKey
|
||||||
|
from sqlalchemy.sql import func
|
||||||
|
from sqlalchemy.orm import relationship
|
||||||
|
from app.db.base import Base
|
||||||
|
|
||||||
|
|
||||||
|
class Wallet(Base):
|
||||||
|
__tablename__ = "wallets"
|
||||||
|
|
||||||
|
id = Column(Integer, primary_key=True, index=True)
|
||||||
|
user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
|
||||||
|
currency = Column(String, nullable=False) # BTC, ETH, USDT
|
||||||
|
address = Column(String, unique=True, nullable=False)
|
||||||
|
private_key_encrypted = Column(String, nullable=False)
|
||||||
|
balance = Column(Float, default=0.0)
|
||||||
|
is_active = Column(Boolean, default=True)
|
||||||
|
created_at = Column(DateTime(timezone=True), server_default=func.now())
|
||||||
|
updated_at = Column(DateTime(timezone=True), onupdate=func.now())
|
||||||
|
|
||||||
|
# Relationships
|
||||||
|
owner = relationship("User", back_populates="wallets")
|
||||||
|
transactions_sent = relationship("Transaction", foreign_keys="Transaction.from_wallet_id", back_populates="from_wallet")
|
||||||
|
transactions_received = relationship("Transaction", foreign_keys="Transaction.to_wallet_id", back_populates="to_wallet")
|
||||||
|
|
||||||
|
|
||||||
|
class FiatAccount(Base):
|
||||||
|
__tablename__ = "fiat_accounts"
|
||||||
|
|
||||||
|
id = Column(Integer, primary_key=True, index=True)
|
||||||
|
user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
|
||||||
|
currency = Column(String, nullable=False) # USD, EUR, GBP
|
||||||
|
balance = Column(Float, default=0.0)
|
||||||
|
is_active = Column(Boolean, default=True)
|
||||||
|
created_at = Column(DateTime(timezone=True), server_default=func.now())
|
||||||
|
updated_at = Column(DateTime(timezone=True), onupdate=func.now())
|
||||||
|
|
||||||
|
# Relationships
|
||||||
|
owner = relationship("User", back_populates="fiat_accounts")
|
||||||
|
deposits = relationship("FiatTransaction", foreign_keys="FiatTransaction.account_id", back_populates="account")
|
||||||
20
app/schemas/__init__.py
Normal file
20
app/schemas/__init__.py
Normal file
@ -0,0 +1,20 @@
|
|||||||
|
from app.schemas.user import UserCreate, UserResponse, UserLogin, Token, TokenData, UserUpdate
|
||||||
|
from app.schemas.wallet import WalletCreate, WalletResponse, FiatAccountCreate, FiatAccountResponse
|
||||||
|
from app.schemas.transaction import TransactionCreate, TransactionResponse, FiatTransactionCreate, FiatTransactionResponse
|
||||||
|
|
||||||
|
__all__ = [
|
||||||
|
"UserCreate",
|
||||||
|
"UserResponse",
|
||||||
|
"UserLogin",
|
||||||
|
"Token",
|
||||||
|
"TokenData",
|
||||||
|
"UserUpdate",
|
||||||
|
"WalletCreate",
|
||||||
|
"WalletResponse",
|
||||||
|
"FiatAccountCreate",
|
||||||
|
"FiatAccountResponse",
|
||||||
|
"TransactionCreate",
|
||||||
|
"TransactionResponse",
|
||||||
|
"FiatTransactionCreate",
|
||||||
|
"FiatTransactionResponse"
|
||||||
|
]
|
||||||
56
app/schemas/transaction.py
Normal file
56
app/schemas/transaction.py
Normal file
@ -0,0 +1,56 @@
|
|||||||
|
from pydantic import BaseModel
|
||||||
|
from typing import Optional
|
||||||
|
from datetime import datetime
|
||||||
|
from app.models.transaction import TransactionStatus, TransactionType
|
||||||
|
|
||||||
|
|
||||||
|
class TransactionBase(BaseModel):
|
||||||
|
amount: float
|
||||||
|
currency: str
|
||||||
|
to_address: str
|
||||||
|
notes: Optional[str] = None
|
||||||
|
|
||||||
|
|
||||||
|
class TransactionCreate(TransactionBase):
|
||||||
|
from_wallet_id: Optional[int] = None
|
||||||
|
|
||||||
|
|
||||||
|
class TransactionResponse(TransactionBase):
|
||||||
|
id: int
|
||||||
|
user_id: int
|
||||||
|
from_wallet_id: Optional[int]
|
||||||
|
to_wallet_id: Optional[int]
|
||||||
|
transaction_hash: Optional[str]
|
||||||
|
fee: float
|
||||||
|
transaction_type: TransactionType
|
||||||
|
status: TransactionStatus
|
||||||
|
from_address: Optional[str]
|
||||||
|
block_number: Optional[int]
|
||||||
|
confirmations: int
|
||||||
|
created_at: datetime
|
||||||
|
|
||||||
|
class Config:
|
||||||
|
from_attributes = True
|
||||||
|
|
||||||
|
|
||||||
|
class FiatTransactionBase(BaseModel):
|
||||||
|
amount: float
|
||||||
|
currency: str
|
||||||
|
payment_method: Optional[str] = None
|
||||||
|
notes: Optional[str] = None
|
||||||
|
|
||||||
|
|
||||||
|
class FiatTransactionCreate(FiatTransactionBase):
|
||||||
|
transaction_type: TransactionType
|
||||||
|
|
||||||
|
|
||||||
|
class FiatTransactionResponse(FiatTransactionBase):
|
||||||
|
id: int
|
||||||
|
account_id: int
|
||||||
|
transaction_type: TransactionType
|
||||||
|
status: TransactionStatus
|
||||||
|
bank_reference: Optional[str]
|
||||||
|
created_at: datetime
|
||||||
|
|
||||||
|
class Config:
|
||||||
|
from_attributes = True
|
||||||
45
app/schemas/user.py
Normal file
45
app/schemas/user.py
Normal file
@ -0,0 +1,45 @@
|
|||||||
|
from pydantic import BaseModel, EmailStr
|
||||||
|
from typing import Optional
|
||||||
|
from datetime import datetime
|
||||||
|
|
||||||
|
|
||||||
|
class UserBase(BaseModel):
|
||||||
|
email: EmailStr
|
||||||
|
full_name: str
|
||||||
|
phone_number: Optional[str] = None
|
||||||
|
country: Optional[str] = None
|
||||||
|
|
||||||
|
|
||||||
|
class UserCreate(UserBase):
|
||||||
|
password: str
|
||||||
|
|
||||||
|
|
||||||
|
class UserUpdate(BaseModel):
|
||||||
|
full_name: Optional[str] = None
|
||||||
|
phone_number: Optional[str] = None
|
||||||
|
country: Optional[str] = None
|
||||||
|
|
||||||
|
|
||||||
|
class UserResponse(UserBase):
|
||||||
|
id: int
|
||||||
|
is_active: bool
|
||||||
|
is_verified: bool
|
||||||
|
kyc_level: int
|
||||||
|
created_at: datetime
|
||||||
|
|
||||||
|
class Config:
|
||||||
|
from_attributes = True
|
||||||
|
|
||||||
|
|
||||||
|
class UserLogin(BaseModel):
|
||||||
|
email: EmailStr
|
||||||
|
password: str
|
||||||
|
|
||||||
|
|
||||||
|
class Token(BaseModel):
|
||||||
|
access_token: str
|
||||||
|
token_type: str
|
||||||
|
|
||||||
|
|
||||||
|
class TokenData(BaseModel):
|
||||||
|
email: Optional[str] = None
|
||||||
39
app/schemas/wallet.py
Normal file
39
app/schemas/wallet.py
Normal file
@ -0,0 +1,39 @@
|
|||||||
|
from pydantic import BaseModel
|
||||||
|
from datetime import datetime
|
||||||
|
|
||||||
|
|
||||||
|
class WalletBase(BaseModel):
|
||||||
|
currency: str
|
||||||
|
|
||||||
|
|
||||||
|
class WalletCreate(WalletBase):
|
||||||
|
pass
|
||||||
|
|
||||||
|
|
||||||
|
class WalletResponse(WalletBase):
|
||||||
|
id: int
|
||||||
|
address: str
|
||||||
|
balance: float
|
||||||
|
is_active: bool
|
||||||
|
created_at: datetime
|
||||||
|
|
||||||
|
class Config:
|
||||||
|
from_attributes = True
|
||||||
|
|
||||||
|
|
||||||
|
class FiatAccountBase(BaseModel):
|
||||||
|
currency: str
|
||||||
|
|
||||||
|
|
||||||
|
class FiatAccountCreate(FiatAccountBase):
|
||||||
|
pass
|
||||||
|
|
||||||
|
|
||||||
|
class FiatAccountResponse(FiatAccountBase):
|
||||||
|
id: int
|
||||||
|
balance: float
|
||||||
|
is_active: bool
|
||||||
|
created_at: datetime
|
||||||
|
|
||||||
|
class Config:
|
||||||
|
from_attributes = True
|
||||||
0
app/services/__init__.py
Normal file
0
app/services/__init__.py
Normal file
80
app/services/auth.py
Normal file
80
app/services/auth.py
Normal file
@ -0,0 +1,80 @@
|
|||||||
|
from sqlalchemy.orm import Session
|
||||||
|
from fastapi import HTTPException, status, Depends
|
||||||
|
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
|
||||||
|
from app.models.user import User
|
||||||
|
from app.schemas.user import UserCreate, UserLogin
|
||||||
|
from app.core.security import verify_password, get_password_hash, verify_token
|
||||||
|
from app.db.session import get_db
|
||||||
|
|
||||||
|
security = HTTPBearer()
|
||||||
|
|
||||||
|
|
||||||
|
class AuthService:
|
||||||
|
def __init__(self, db: Session):
|
||||||
|
self.db = db
|
||||||
|
|
||||||
|
def create_user(self, user_data: UserCreate) -> User:
|
||||||
|
# Check if user already exists
|
||||||
|
existing_user = self.db.query(User).filter(User.email == user_data.email).first()
|
||||||
|
if existing_user:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail="Email already registered"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Create new user
|
||||||
|
hashed_password = get_password_hash(user_data.password)
|
||||||
|
db_user = User(
|
||||||
|
email=user_data.email,
|
||||||
|
hashed_password=hashed_password,
|
||||||
|
full_name=user_data.full_name,
|
||||||
|
phone_number=user_data.phone_number,
|
||||||
|
country=user_data.country
|
||||||
|
)
|
||||||
|
|
||||||
|
self.db.add(db_user)
|
||||||
|
self.db.commit()
|
||||||
|
self.db.refresh(db_user)
|
||||||
|
return db_user
|
||||||
|
|
||||||
|
def authenticate_user(self, login_data: UserLogin) -> User:
|
||||||
|
user = self.db.query(User).filter(User.email == login_data.email).first()
|
||||||
|
if not user or not verify_password(login_data.password, user.hashed_password):
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_401_UNAUTHORIZED,
|
||||||
|
detail="Incorrect email or password"
|
||||||
|
)
|
||||||
|
|
||||||
|
if not user.is_active:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_401_UNAUTHORIZED,
|
||||||
|
detail="Account is inactive"
|
||||||
|
)
|
||||||
|
|
||||||
|
return user
|
||||||
|
|
||||||
|
def get_user_by_email(self, email: str) -> User:
|
||||||
|
return self.db.query(User).filter(User.email == email).first()
|
||||||
|
|
||||||
|
|
||||||
|
def get_current_user(
|
||||||
|
credentials: HTTPAuthorizationCredentials = Depends(security),
|
||||||
|
db: Session = Depends(get_db)
|
||||||
|
) -> User:
|
||||||
|
token = credentials.credentials
|
||||||
|
email = verify_token(token)
|
||||||
|
if email is None:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_401_UNAUTHORIZED,
|
||||||
|
detail="Could not validate credentials"
|
||||||
|
)
|
||||||
|
|
||||||
|
auth_service = AuthService(db)
|
||||||
|
user = auth_service.get_user_by_email(email)
|
||||||
|
if user is None:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_401_UNAUTHORIZED,
|
||||||
|
detail="User not found"
|
||||||
|
)
|
||||||
|
|
||||||
|
return user
|
||||||
302
app/services/transaction.py
Normal file
302
app/services/transaction.py
Normal file
@ -0,0 +1,302 @@
|
|||||||
|
from sqlalchemy.orm import Session
|
||||||
|
from fastapi import HTTPException, status
|
||||||
|
from typing import List, Optional
|
||||||
|
from app.models.transaction import Transaction, FiatTransaction, TransactionStatus, TransactionType
|
||||||
|
from app.models.wallet import Wallet, FiatAccount
|
||||||
|
from app.models.user import User
|
||||||
|
from app.schemas.transaction import TransactionCreate, FiatTransactionCreate
|
||||||
|
from app.services.wallet import WalletService
|
||||||
|
from app.utils.crypto import WalletFactory
|
||||||
|
from app.core.config import settings
|
||||||
|
import uuid
|
||||||
|
import hashlib
|
||||||
|
|
||||||
|
|
||||||
|
class TransactionService:
|
||||||
|
def __init__(self, db: Session):
|
||||||
|
self.db = db
|
||||||
|
self.wallet_service = WalletService(db)
|
||||||
|
|
||||||
|
def send_crypto(self, user: User, transaction_data: TransactionCreate) -> Transaction:
|
||||||
|
# Get sender wallet
|
||||||
|
from_wallet = self.wallet_service.get_wallet_by_id(transaction_data.from_wallet_id, user)
|
||||||
|
if not from_wallet:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_404_NOT_FOUND,
|
||||||
|
detail="Wallet not found"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Validate currency match
|
||||||
|
if from_wallet.currency != transaction_data.currency:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail="Currency mismatch"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Check balance
|
||||||
|
if from_wallet.balance < transaction_data.amount:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail="Insufficient balance"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Validate recipient address
|
||||||
|
if not WalletFactory.verify_address(transaction_data.currency, transaction_data.to_address):
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail="Invalid recipient address"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Calculate fee (simplified - in production, use dynamic fee calculation)
|
||||||
|
fee = self._calculate_transaction_fee(transaction_data.currency, transaction_data.amount)
|
||||||
|
|
||||||
|
if from_wallet.balance < (transaction_data.amount + fee):
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail="Insufficient balance including fees"
|
||||||
|
)
|
||||||
|
|
||||||
|
try:
|
||||||
|
# Create transaction record
|
||||||
|
transaction = Transaction(
|
||||||
|
user_id=user.id,
|
||||||
|
from_wallet_id=from_wallet.id,
|
||||||
|
amount=transaction_data.amount,
|
||||||
|
fee=fee,
|
||||||
|
currency=transaction_data.currency,
|
||||||
|
transaction_type=TransactionType.SEND,
|
||||||
|
status=TransactionStatus.PENDING,
|
||||||
|
from_address=from_wallet.address,
|
||||||
|
to_address=transaction_data.to_address,
|
||||||
|
notes=transaction_data.notes
|
||||||
|
)
|
||||||
|
|
||||||
|
self.db.add(transaction)
|
||||||
|
self.db.flush() # Get the transaction ID
|
||||||
|
|
||||||
|
# Sign and broadcast transaction
|
||||||
|
signed_hash = self._sign_transaction(user, from_wallet, transaction)
|
||||||
|
transaction.transaction_hash = signed_hash
|
||||||
|
|
||||||
|
# Update wallet balance
|
||||||
|
new_balance = from_wallet.balance - transaction_data.amount - fee
|
||||||
|
self.wallet_service.update_wallet_balance(from_wallet.id, new_balance)
|
||||||
|
|
||||||
|
# In production, you would broadcast to the network here
|
||||||
|
# For now, we'll mark as confirmed
|
||||||
|
transaction.status = TransactionStatus.CONFIRMED
|
||||||
|
transaction.confirmations = 1
|
||||||
|
|
||||||
|
self.db.commit()
|
||||||
|
self.db.refresh(transaction)
|
||||||
|
|
||||||
|
return transaction
|
||||||
|
|
||||||
|
except Exception as e:
|
||||||
|
self.db.rollback()
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
|
||||||
|
detail=f"Transaction failed: {str(e)}"
|
||||||
|
)
|
||||||
|
|
||||||
|
def receive_crypto(self, user: User, amount: float, currency: str, from_address: str, to_wallet_id: int) -> Transaction:
|
||||||
|
# Get recipient wallet
|
||||||
|
to_wallet = self.wallet_service.get_wallet_by_id(to_wallet_id, user)
|
||||||
|
if not to_wallet:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_404_NOT_FOUND,
|
||||||
|
detail="Wallet not found"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Create transaction record
|
||||||
|
transaction = Transaction(
|
||||||
|
user_id=user.id,
|
||||||
|
to_wallet_id=to_wallet.id,
|
||||||
|
amount=amount,
|
||||||
|
currency=currency,
|
||||||
|
transaction_type=TransactionType.RECEIVE,
|
||||||
|
status=TransactionStatus.CONFIRMED,
|
||||||
|
from_address=from_address,
|
||||||
|
to_address=to_wallet.address,
|
||||||
|
confirmations=1
|
||||||
|
)
|
||||||
|
|
||||||
|
self.db.add(transaction)
|
||||||
|
|
||||||
|
# Update wallet balance
|
||||||
|
new_balance = to_wallet.balance + amount
|
||||||
|
self.wallet_service.update_wallet_balance(to_wallet.id, new_balance)
|
||||||
|
|
||||||
|
self.db.commit()
|
||||||
|
self.db.refresh(transaction)
|
||||||
|
|
||||||
|
return transaction
|
||||||
|
|
||||||
|
def deposit_fiat(self, user: User, transaction_data: FiatTransactionCreate) -> FiatTransaction:
|
||||||
|
# Get fiat account
|
||||||
|
fiat_account = self.db.query(FiatAccount).filter(
|
||||||
|
FiatAccount.user_id == user.id,
|
||||||
|
FiatAccount.currency == transaction_data.currency
|
||||||
|
).first()
|
||||||
|
|
||||||
|
if not fiat_account:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_404_NOT_FOUND,
|
||||||
|
detail="Fiat account not found"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Validate deposit limits
|
||||||
|
if transaction_data.amount < settings.min_fiat_deposit:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail=f"Minimum deposit amount is {settings.min_fiat_deposit}"
|
||||||
|
)
|
||||||
|
|
||||||
|
if transaction_data.amount > settings.max_fiat_deposit:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail=f"Maximum deposit amount is {settings.max_fiat_deposit}"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Create fiat transaction
|
||||||
|
transaction = FiatTransaction(
|
||||||
|
account_id=fiat_account.id,
|
||||||
|
amount=transaction_data.amount,
|
||||||
|
currency=transaction_data.currency,
|
||||||
|
transaction_type=TransactionType.DEPOSIT,
|
||||||
|
status=TransactionStatus.PENDING,
|
||||||
|
payment_method=transaction_data.payment_method,
|
||||||
|
notes=transaction_data.notes,
|
||||||
|
bank_reference=str(uuid.uuid4())
|
||||||
|
)
|
||||||
|
|
||||||
|
self.db.add(transaction)
|
||||||
|
self.db.commit()
|
||||||
|
self.db.refresh(transaction)
|
||||||
|
|
||||||
|
return transaction
|
||||||
|
|
||||||
|
def withdraw_fiat(self, user: User, transaction_data: FiatTransactionCreate) -> FiatTransaction:
|
||||||
|
# Get fiat account
|
||||||
|
fiat_account = self.db.query(FiatAccount).filter(
|
||||||
|
FiatAccount.user_id == user.id,
|
||||||
|
FiatAccount.currency == transaction_data.currency
|
||||||
|
).first()
|
||||||
|
|
||||||
|
if not fiat_account:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_404_NOT_FOUND,
|
||||||
|
detail="Fiat account not found"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Check balance
|
||||||
|
if fiat_account.balance < transaction_data.amount:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail="Insufficient balance"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Validate withdrawal limits
|
||||||
|
if transaction_data.amount < settings.min_fiat_withdrawal:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail=f"Minimum withdrawal amount is {settings.min_fiat_withdrawal}"
|
||||||
|
)
|
||||||
|
|
||||||
|
if transaction_data.amount > settings.max_fiat_withdrawal:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail=f"Maximum withdrawal amount is {settings.max_fiat_withdrawal}"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Create fiat transaction
|
||||||
|
transaction = FiatTransaction(
|
||||||
|
account_id=fiat_account.id,
|
||||||
|
amount=transaction_data.amount,
|
||||||
|
currency=transaction_data.currency,
|
||||||
|
transaction_type=TransactionType.WITHDRAWAL,
|
||||||
|
status=TransactionStatus.PENDING,
|
||||||
|
payment_method=transaction_data.payment_method,
|
||||||
|
notes=transaction_data.notes,
|
||||||
|
bank_reference=str(uuid.uuid4())
|
||||||
|
)
|
||||||
|
|
||||||
|
self.db.add(transaction)
|
||||||
|
|
||||||
|
# Update fiat account balance
|
||||||
|
new_balance = fiat_account.balance - transaction_data.amount
|
||||||
|
self.wallet_service.update_fiat_balance(fiat_account.id, new_balance)
|
||||||
|
|
||||||
|
self.db.commit()
|
||||||
|
self.db.refresh(transaction)
|
||||||
|
|
||||||
|
return transaction
|
||||||
|
|
||||||
|
def get_user_transactions(self, user: User, limit: int = 50, offset: int = 0) -> List[Transaction]:
|
||||||
|
return self.db.query(Transaction).filter(
|
||||||
|
Transaction.user_id == user.id
|
||||||
|
).order_by(Transaction.created_at.desc()).offset(offset).limit(limit).all()
|
||||||
|
|
||||||
|
def get_user_fiat_transactions(self, user: User, limit: int = 50, offset: int = 0) -> List[FiatTransaction]:
|
||||||
|
fiat_accounts = self.wallet_service.get_user_fiat_accounts(user)
|
||||||
|
account_ids = [acc.id for acc in fiat_accounts]
|
||||||
|
|
||||||
|
return self.db.query(FiatTransaction).filter(
|
||||||
|
FiatTransaction.account_id.in_(account_ids)
|
||||||
|
).order_by(FiatTransaction.created_at.desc()).offset(offset).limit(limit).all()
|
||||||
|
|
||||||
|
def get_transaction_by_id(self, transaction_id: int, user: User) -> Optional[Transaction]:
|
||||||
|
return self.db.query(Transaction).filter(
|
||||||
|
Transaction.id == transaction_id,
|
||||||
|
Transaction.user_id == user.id
|
||||||
|
).first()
|
||||||
|
|
||||||
|
def _sign_transaction(self, user: User, from_wallet: Wallet, transaction: Transaction) -> str:
|
||||||
|
"""Sign the transaction using the wallet's private key"""
|
||||||
|
try:
|
||||||
|
# Get private key
|
||||||
|
private_key = self.wallet_service.get_private_key(from_wallet, user)
|
||||||
|
|
||||||
|
# Prepare transaction data for signing
|
||||||
|
transaction_data = {
|
||||||
|
'from': from_wallet.address,
|
||||||
|
'to': transaction.to_address,
|
||||||
|
'amount': transaction.amount,
|
||||||
|
'fee': transaction.fee,
|
||||||
|
'nonce': transaction.id,
|
||||||
|
'currency': transaction.currency
|
||||||
|
}
|
||||||
|
|
||||||
|
# Sign transaction
|
||||||
|
signature = WalletFactory.sign_transaction(
|
||||||
|
transaction.currency,
|
||||||
|
private_key,
|
||||||
|
transaction_data
|
||||||
|
)
|
||||||
|
|
||||||
|
# Generate transaction hash
|
||||||
|
tx_hash = hashlib.sha256(
|
||||||
|
f"{signature}_{transaction.id}_{transaction.from_address}_{transaction.to_address}".encode()
|
||||||
|
).hexdigest()
|
||||||
|
|
||||||
|
return tx_hash
|
||||||
|
|
||||||
|
except Exception as e:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
|
||||||
|
detail=f"Failed to sign transaction: {str(e)}"
|
||||||
|
)
|
||||||
|
|
||||||
|
def _calculate_transaction_fee(self, currency: str, amount: float) -> float:
|
||||||
|
"""Calculate transaction fee based on currency and amount"""
|
||||||
|
# Simplified fee calculation - in production, use dynamic fee estimation
|
||||||
|
fee_rates = {
|
||||||
|
'BTC': 0.0001, # Fixed fee
|
||||||
|
'ETH': 0.002, # 0.2% of amount
|
||||||
|
'USDT': 0.001 # 0.1% of amount
|
||||||
|
}
|
||||||
|
|
||||||
|
if currency == 'BTC':
|
||||||
|
return fee_rates['BTC']
|
||||||
|
else:
|
||||||
|
return amount * fee_rates.get(currency, 0.001)
|
||||||
134
app/services/wallet.py
Normal file
134
app/services/wallet.py
Normal file
@ -0,0 +1,134 @@
|
|||||||
|
from sqlalchemy.orm import Session
|
||||||
|
from fastapi import HTTPException, status
|
||||||
|
from typing import List, Optional
|
||||||
|
from app.models.wallet import Wallet, FiatAccount
|
||||||
|
from app.models.user import User
|
||||||
|
from app.schemas.wallet import WalletCreate, FiatAccountCreate
|
||||||
|
from app.utils.crypto import WalletFactory, CryptoUtils
|
||||||
|
from app.core.config import settings
|
||||||
|
|
||||||
|
|
||||||
|
class WalletService:
|
||||||
|
def __init__(self, db: Session):
|
||||||
|
self.db = db
|
||||||
|
|
||||||
|
def create_crypto_wallet(self, user: User, wallet_data: WalletCreate) -> Wallet:
|
||||||
|
# Check if user already has a wallet for this currency
|
||||||
|
existing_wallet = self.db.query(Wallet).filter(
|
||||||
|
Wallet.user_id == user.id,
|
||||||
|
Wallet.currency == wallet_data.currency.upper()
|
||||||
|
).first()
|
||||||
|
|
||||||
|
if existing_wallet:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail=f"Wallet for {wallet_data.currency} already exists"
|
||||||
|
)
|
||||||
|
|
||||||
|
try:
|
||||||
|
# Generate wallet
|
||||||
|
private_key, address = WalletFactory.create_wallet(wallet_data.currency)
|
||||||
|
|
||||||
|
# Encrypt private key
|
||||||
|
encryption_password = f"{user.email}_{settings.secret_key}"
|
||||||
|
encrypted_private_key = CryptoUtils.encrypt_private_key(private_key, encryption_password)
|
||||||
|
|
||||||
|
# Create wallet record
|
||||||
|
db_wallet = Wallet(
|
||||||
|
user_id=user.id,
|
||||||
|
currency=wallet_data.currency.upper(),
|
||||||
|
address=address,
|
||||||
|
private_key_encrypted=encrypted_private_key,
|
||||||
|
balance=0.0
|
||||||
|
)
|
||||||
|
|
||||||
|
self.db.add(db_wallet)
|
||||||
|
self.db.commit()
|
||||||
|
self.db.refresh(db_wallet)
|
||||||
|
|
||||||
|
return db_wallet
|
||||||
|
|
||||||
|
except Exception as e:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
|
||||||
|
detail=f"Failed to create wallet: {str(e)}"
|
||||||
|
)
|
||||||
|
|
||||||
|
def create_fiat_account(self, user: User, account_data: FiatAccountCreate) -> FiatAccount:
|
||||||
|
# Check if user already has an account for this currency
|
||||||
|
existing_account = self.db.query(FiatAccount).filter(
|
||||||
|
FiatAccount.user_id == user.id,
|
||||||
|
FiatAccount.currency == account_data.currency.upper()
|
||||||
|
).first()
|
||||||
|
|
||||||
|
if existing_account:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail=f"Fiat account for {account_data.currency} already exists"
|
||||||
|
)
|
||||||
|
|
||||||
|
db_account = FiatAccount(
|
||||||
|
user_id=user.id,
|
||||||
|
currency=account_data.currency.upper(),
|
||||||
|
balance=0.0
|
||||||
|
)
|
||||||
|
|
||||||
|
self.db.add(db_account)
|
||||||
|
self.db.commit()
|
||||||
|
self.db.refresh(db_account)
|
||||||
|
|
||||||
|
return db_account
|
||||||
|
|
||||||
|
def get_user_wallets(self, user: User) -> List[Wallet]:
|
||||||
|
return self.db.query(Wallet).filter(
|
||||||
|
Wallet.user_id == user.id,
|
||||||
|
Wallet.is_active
|
||||||
|
).all()
|
||||||
|
|
||||||
|
def get_user_fiat_accounts(self, user: User) -> List[FiatAccount]:
|
||||||
|
return self.db.query(FiatAccount).filter(
|
||||||
|
FiatAccount.user_id == user.id,
|
||||||
|
FiatAccount.is_active
|
||||||
|
).all()
|
||||||
|
|
||||||
|
def get_wallet_by_id(self, wallet_id: int, user: User) -> Optional[Wallet]:
|
||||||
|
return self.db.query(Wallet).filter(
|
||||||
|
Wallet.id == wallet_id,
|
||||||
|
Wallet.user_id == user.id
|
||||||
|
).first()
|
||||||
|
|
||||||
|
def get_fiat_account_by_id(self, account_id: int, user: User) -> Optional[FiatAccount]:
|
||||||
|
return self.db.query(FiatAccount).filter(
|
||||||
|
FiatAccount.id == account_id,
|
||||||
|
FiatAccount.user_id == user.id
|
||||||
|
).first()
|
||||||
|
|
||||||
|
def update_wallet_balance(self, wallet_id: int, new_balance: float) -> bool:
|
||||||
|
wallet = self.db.query(Wallet).filter(Wallet.id == wallet_id).first()
|
||||||
|
if wallet:
|
||||||
|
wallet.balance = new_balance
|
||||||
|
self.db.commit()
|
||||||
|
return True
|
||||||
|
return False
|
||||||
|
|
||||||
|
def update_fiat_balance(self, account_id: int, new_balance: float) -> bool:
|
||||||
|
account = self.db.query(FiatAccount).filter(FiatAccount.id == account_id).first()
|
||||||
|
if account:
|
||||||
|
account.balance = new_balance
|
||||||
|
self.db.commit()
|
||||||
|
return True
|
||||||
|
return False
|
||||||
|
|
||||||
|
def get_private_key(self, wallet: Wallet, user: User) -> str:
|
||||||
|
try:
|
||||||
|
encryption_password = f"{user.email}_{settings.secret_key}"
|
||||||
|
private_key = CryptoUtils.decrypt_private_key(
|
||||||
|
wallet.private_key_encrypted,
|
||||||
|
encryption_password
|
||||||
|
)
|
||||||
|
return private_key
|
||||||
|
except Exception:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
|
||||||
|
detail="Failed to decrypt private key"
|
||||||
|
)
|
||||||
0
app/utils/__init__.py
Normal file
0
app/utils/__init__.py
Normal file
151
app/utils/crypto.py
Normal file
151
app/utils/crypto.py
Normal file
@ -0,0 +1,151 @@
|
|||||||
|
import hashlib
|
||||||
|
import secrets
|
||||||
|
import ecdsa
|
||||||
|
from bitcoin import privtopub, pubtoaddr
|
||||||
|
from cryptography.fernet import Fernet
|
||||||
|
from cryptography.hazmat.primitives import hashes
|
||||||
|
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
|
||||||
|
import base64
|
||||||
|
import os
|
||||||
|
from typing import Tuple, Dict
|
||||||
|
from web3 import Web3
|
||||||
|
|
||||||
|
|
||||||
|
class CryptoUtils:
|
||||||
|
@staticmethod
|
||||||
|
def generate_encryption_key(password: str, salt: bytes = None) -> bytes:
|
||||||
|
if salt is None:
|
||||||
|
salt = os.urandom(16)
|
||||||
|
|
||||||
|
kdf = PBKDF2HMAC(
|
||||||
|
algorithm=hashes.SHA256(),
|
||||||
|
length=32,
|
||||||
|
salt=salt,
|
||||||
|
iterations=100000,
|
||||||
|
)
|
||||||
|
key = base64.urlsafe_b64encode(kdf.derive(password.encode()))
|
||||||
|
return key
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def encrypt_private_key(private_key: str, password: str) -> str:
|
||||||
|
salt = os.urandom(16)
|
||||||
|
key = CryptoUtils.generate_encryption_key(password, salt)
|
||||||
|
f = Fernet(key)
|
||||||
|
encrypted = f.encrypt(private_key.encode())
|
||||||
|
# Combine salt and encrypted data
|
||||||
|
return base64.b64encode(salt + encrypted).decode()
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def decrypt_private_key(encrypted_key: str, password: str) -> str:
|
||||||
|
data = base64.b64decode(encrypted_key.encode())
|
||||||
|
salt = data[:16]
|
||||||
|
encrypted = data[16:]
|
||||||
|
|
||||||
|
key = CryptoUtils.generate_encryption_key(password, salt)
|
||||||
|
f = Fernet(key)
|
||||||
|
decrypted = f.decrypt(encrypted)
|
||||||
|
return decrypted.decode()
|
||||||
|
|
||||||
|
|
||||||
|
class BitcoinWallet:
|
||||||
|
@staticmethod
|
||||||
|
def generate_wallet() -> Tuple[str, str]:
|
||||||
|
# Generate private key
|
||||||
|
private_key = secrets.randbits(256)
|
||||||
|
private_key_hex = hex(private_key)[2:].zfill(64)
|
||||||
|
|
||||||
|
# Generate public key and address
|
||||||
|
public_key = privtopub(private_key_hex)
|
||||||
|
address = pubtoaddr(public_key)
|
||||||
|
|
||||||
|
return private_key_hex, address
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def sign_transaction(private_key_hex: str, transaction_data: Dict) -> str:
|
||||||
|
# Simplified transaction signing for Bitcoin
|
||||||
|
# In production, use proper Bitcoin transaction libraries
|
||||||
|
message = str(transaction_data).encode()
|
||||||
|
message_hash = hashlib.sha256(message).digest()
|
||||||
|
|
||||||
|
private_key_int = int(private_key_hex, 16)
|
||||||
|
signing_key = ecdsa.SigningKey.from_string(
|
||||||
|
private_key_int.to_bytes(32, byteorder='big'),
|
||||||
|
curve=ecdsa.SECP256k1
|
||||||
|
)
|
||||||
|
|
||||||
|
signature = signing_key.sign(message_hash)
|
||||||
|
return signature.hex()
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def verify_address(address: str) -> bool:
|
||||||
|
# Basic Bitcoin address validation
|
||||||
|
try:
|
||||||
|
if len(address) < 26 or len(address) > 35:
|
||||||
|
return False
|
||||||
|
return address.startswith(('1', '3', 'bc1'))
|
||||||
|
except Exception:
|
||||||
|
return False
|
||||||
|
|
||||||
|
|
||||||
|
class EthereumWallet:
|
||||||
|
@staticmethod
|
||||||
|
def generate_wallet() -> Tuple[str, str]:
|
||||||
|
# Generate private key
|
||||||
|
private_key = secrets.randbits(256)
|
||||||
|
private_key_hex = hex(private_key)[2:].zfill(64)
|
||||||
|
|
||||||
|
# Generate address using Web3
|
||||||
|
w3 = Web3()
|
||||||
|
account = w3.eth.account.from_key(private_key_hex)
|
||||||
|
|
||||||
|
return private_key_hex, account.address
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def sign_transaction(private_key_hex: str, transaction_data: Dict) -> str:
|
||||||
|
w3 = Web3()
|
||||||
|
|
||||||
|
# Sign the transaction
|
||||||
|
signed_txn = w3.eth.account.sign_transaction(transaction_data, private_key_hex)
|
||||||
|
return signed_txn.rawTransaction.hex()
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def verify_address(address: str) -> bool:
|
||||||
|
try:
|
||||||
|
return Web3.is_address(address)
|
||||||
|
except Exception:
|
||||||
|
return False
|
||||||
|
|
||||||
|
|
||||||
|
class WalletFactory:
|
||||||
|
@staticmethod
|
||||||
|
def create_wallet(currency: str) -> Tuple[str, str]:
|
||||||
|
currency = currency.upper()
|
||||||
|
|
||||||
|
if currency == 'BTC':
|
||||||
|
return BitcoinWallet.generate_wallet()
|
||||||
|
elif currency in ['ETH', 'USDT']:
|
||||||
|
return EthereumWallet.generate_wallet()
|
||||||
|
else:
|
||||||
|
raise ValueError(f"Unsupported currency: {currency}")
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def sign_transaction(currency: str, private_key: str, transaction_data: Dict) -> str:
|
||||||
|
currency = currency.upper()
|
||||||
|
|
||||||
|
if currency == 'BTC':
|
||||||
|
return BitcoinWallet.sign_transaction(private_key, transaction_data)
|
||||||
|
elif currency in ['ETH', 'USDT']:
|
||||||
|
return EthereumWallet.sign_transaction(private_key, transaction_data)
|
||||||
|
else:
|
||||||
|
raise ValueError(f"Unsupported currency: {currency}")
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def verify_address(currency: str, address: str) -> bool:
|
||||||
|
currency = currency.upper()
|
||||||
|
|
||||||
|
if currency == 'BTC':
|
||||||
|
return BitcoinWallet.verify_address(address)
|
||||||
|
elif currency in ['ETH', 'USDT']:
|
||||||
|
return EthereumWallet.verify_address(address)
|
||||||
|
else:
|
||||||
|
return False
|
||||||
133
app/utils/validation.py
Normal file
133
app/utils/validation.py
Normal file
@ -0,0 +1,133 @@
|
|||||||
|
import re
|
||||||
|
from fastapi import HTTPException, status
|
||||||
|
|
||||||
|
|
||||||
|
class ValidationUtils:
|
||||||
|
@staticmethod
|
||||||
|
def validate_email(email: str) -> bool:
|
||||||
|
pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
|
||||||
|
return re.match(pattern, email) is not None
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def validate_password(password: str) -> bool:
|
||||||
|
# At least 8 characters, one uppercase, one lowercase, one digit
|
||||||
|
if len(password) < 8:
|
||||||
|
return False
|
||||||
|
if not re.search(r'[A-Z]', password):
|
||||||
|
return False
|
||||||
|
if not re.search(r'[a-z]', password):
|
||||||
|
return False
|
||||||
|
if not re.search(r'\d', password):
|
||||||
|
return False
|
||||||
|
return True
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def validate_phone_number(phone: str) -> bool:
|
||||||
|
# Basic international phone number validation
|
||||||
|
pattern = r'^\+?[1-9]\d{1,14}$'
|
||||||
|
return re.match(pattern, phone) is not None
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def validate_amount(amount: float, min_amount: float = 0.0001, max_amount: float = 1000000) -> bool:
|
||||||
|
if amount <= 0:
|
||||||
|
return False
|
||||||
|
if amount < min_amount or amount > max_amount:
|
||||||
|
return False
|
||||||
|
return True
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def validate_currency_code(currency: str) -> bool:
|
||||||
|
valid_currencies = ['BTC', 'ETH', 'USDT', 'USD', 'EUR', 'GBP']
|
||||||
|
return currency.upper() in valid_currencies
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def sanitize_string(input_string: str, max_length: int = 255) -> str:
|
||||||
|
if not input_string:
|
||||||
|
return ""
|
||||||
|
|
||||||
|
# Remove potentially dangerous characters
|
||||||
|
sanitized = re.sub(r'[<>"\']', '', input_string)
|
||||||
|
|
||||||
|
# Trim to max length
|
||||||
|
return sanitized[:max_length].strip()
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def validate_kyc_level(level: int) -> bool:
|
||||||
|
return level in [0, 1, 2]
|
||||||
|
|
||||||
|
@staticmethod
|
||||||
|
def validate_transaction_type(transaction_type: str) -> bool:
|
||||||
|
valid_types = ['SEND', 'RECEIVE', 'DEPOSIT', 'WITHDRAWAL']
|
||||||
|
return transaction_type.upper() in valid_types
|
||||||
|
|
||||||
|
|
||||||
|
def validate_required_fields(data: dict, required_fields: list) -> None:
|
||||||
|
"""Validate that all required fields are present and not empty"""
|
||||||
|
missing_fields = []
|
||||||
|
for field in required_fields:
|
||||||
|
if field not in data or not data[field]:
|
||||||
|
missing_fields.append(field)
|
||||||
|
|
||||||
|
if missing_fields:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail=f"Missing required fields: {', '.join(missing_fields)}"
|
||||||
|
)
|
||||||
|
|
||||||
|
|
||||||
|
def validate_user_registration(email: str, password: str, full_name: str) -> None:
|
||||||
|
"""Validate user registration data"""
|
||||||
|
if not ValidationUtils.validate_email(email):
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail="Invalid email format"
|
||||||
|
)
|
||||||
|
|
||||||
|
if not ValidationUtils.validate_password(password):
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail="Password must be at least 8 characters with uppercase, lowercase, and digit"
|
||||||
|
)
|
||||||
|
|
||||||
|
if len(full_name.strip()) < 2:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail="Full name must be at least 2 characters"
|
||||||
|
)
|
||||||
|
|
||||||
|
|
||||||
|
def validate_transaction_amount(amount: float, currency: str) -> None:
|
||||||
|
"""Validate transaction amount based on currency"""
|
||||||
|
min_amounts = {
|
||||||
|
'BTC': 0.00001,
|
||||||
|
'ETH': 0.001,
|
||||||
|
'USDT': 0.01,
|
||||||
|
'USD': 0.01,
|
||||||
|
'EUR': 0.01,
|
||||||
|
'GBP': 0.01
|
||||||
|
}
|
||||||
|
|
||||||
|
max_amounts = {
|
||||||
|
'BTC': 100,
|
||||||
|
'ETH': 1000,
|
||||||
|
'USDT': 100000,
|
||||||
|
'USD': 100000,
|
||||||
|
'EUR': 100000,
|
||||||
|
'GBP': 100000
|
||||||
|
}
|
||||||
|
|
||||||
|
currency = currency.upper()
|
||||||
|
min_amount = min_amounts.get(currency, 0.01)
|
||||||
|
max_amount = max_amounts.get(currency, 100000)
|
||||||
|
|
||||||
|
if amount < min_amount:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail=f"Minimum amount for {currency} is {min_amount}"
|
||||||
|
)
|
||||||
|
|
||||||
|
if amount > max_amount:
|
||||||
|
raise HTTPException(
|
||||||
|
status_code=status.HTTP_400_BAD_REQUEST,
|
||||||
|
detail=f"Maximum amount for {currency} is {max_amount}"
|
||||||
|
)
|
||||||
76
main.py
Normal file
76
main.py
Normal file
@ -0,0 +1,76 @@
|
|||||||
|
from fastapi import FastAPI
|
||||||
|
from fastapi.middleware.cors import CORSMiddleware
|
||||||
|
from fastapi.responses import JSONResponse
|
||||||
|
from app.core.config import settings
|
||||||
|
from app.core.middleware import RateLimitMiddleware, SecurityHeadersMiddleware, LoggingMiddleware
|
||||||
|
from app.api import auth, wallets, transactions
|
||||||
|
from app.db.session import engine
|
||||||
|
from app.db.base import Base
|
||||||
|
import uvicorn
|
||||||
|
|
||||||
|
# Create database tables
|
||||||
|
Base.metadata.create_all(bind=engine)
|
||||||
|
|
||||||
|
app = FastAPI(
|
||||||
|
title=settings.app_name,
|
||||||
|
version=settings.app_version,
|
||||||
|
description="A comprehensive cryptocurrency exchange platform with wallet management, trading, and secure transaction handling.",
|
||||||
|
openapi_url="/openapi.json"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Security middleware
|
||||||
|
app.add_middleware(SecurityHeadersMiddleware)
|
||||||
|
app.add_middleware(RateLimitMiddleware, calls=100, period=60)
|
||||||
|
app.add_middleware(LoggingMiddleware)
|
||||||
|
|
||||||
|
# CORS middleware
|
||||||
|
app.add_middleware(
|
||||||
|
CORSMiddleware,
|
||||||
|
allow_origins=settings.allowed_origins,
|
||||||
|
allow_credentials=True,
|
||||||
|
allow_methods=["*"],
|
||||||
|
allow_headers=["*"],
|
||||||
|
)
|
||||||
|
|
||||||
|
# Include routers
|
||||||
|
app.include_router(auth.router)
|
||||||
|
app.include_router(wallets.router)
|
||||||
|
app.include_router(transactions.router)
|
||||||
|
|
||||||
|
|
||||||
|
@app.get("/")
|
||||||
|
def root():
|
||||||
|
return {
|
||||||
|
"title": settings.app_name,
|
||||||
|
"version": settings.app_version,
|
||||||
|
"description": "Cryptocurrency Exchange Platform API",
|
||||||
|
"documentation": "/docs",
|
||||||
|
"health_check": "/health"
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
@app.get("/health")
|
||||||
|
def health_check():
|
||||||
|
return {
|
||||||
|
"status": "healthy",
|
||||||
|
"service": settings.app_name,
|
||||||
|
"version": settings.app_version,
|
||||||
|
"environment": "development" if settings.debug else "production"
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
@app.exception_handler(Exception)
|
||||||
|
async def global_exception_handler(request, exc):
|
||||||
|
return JSONResponse(
|
||||||
|
status_code=500,
|
||||||
|
content={"detail": "Internal server error"}
|
||||||
|
)
|
||||||
|
|
||||||
|
|
||||||
|
if __name__ == "__main__":
|
||||||
|
uvicorn.run(
|
||||||
|
"main:app",
|
||||||
|
host="0.0.0.0",
|
||||||
|
port=8000,
|
||||||
|
reload=settings.debug
|
||||||
|
)
|
||||||
19
requirements.txt
Normal file
19
requirements.txt
Normal file
@ -0,0 +1,19 @@
|
|||||||
|
fastapi==0.104.1
|
||||||
|
uvicorn==0.24.0
|
||||||
|
sqlalchemy==2.0.23
|
||||||
|
alembic==1.12.1
|
||||||
|
python-jose[cryptography]==3.3.0
|
||||||
|
python-multipart==0.0.6
|
||||||
|
passlib[bcrypt]==1.7.4
|
||||||
|
python-decouple==3.8
|
||||||
|
pydantic==2.5.0
|
||||||
|
pydantic-settings==2.1.0
|
||||||
|
cryptography==41.0.8
|
||||||
|
ecdsa==0.18.0
|
||||||
|
bitcoin==1.1.42
|
||||||
|
web3==6.12.0
|
||||||
|
requests==2.31.0
|
||||||
|
ruff==0.1.7
|
||||||
|
pytest==7.4.3
|
||||||
|
pytest-asyncio==0.21.1
|
||||||
|
httpx==0.25.2
|
||||||
Loading…
x
Reference in New Issue
Block a user