Add basic binance based loans as a new strategy

[posix4e]

Here's a draft for creating a GitHub issue requesting support for integrating Binance lending as a strategy in Mr. Market:

---

Title: Add Support for Binance Lending as a Strategy

Description:
I would like to request a new feature for Mr. Market: support for Binance Lending as a trading/investment strategy. This feature would enable users to automatically lend their assets through Binance's Flexible Savings, Locked Savings, or other lending products to earn passive income.

---

Feature Details:

1. Objective:

   • Automate the process of lending assets on Binance to generate interest.
   • Allow users to configure their preferred lending options, such as asset type, lending amount, and product type (e.g., Flexible Savings or Locked Savings).
   • Handle deposits and track amounts deposited by the user from an external wallet.

2. API Integration:

   • Utilize the Binance API endpoints for lending:

     • /sapi/v1/lending/daily/product/list: To fetch available lending products.
     • /sapi/v1/lending/daily/position: To manage Flexible Savings.
     • /sapi/v1/lending/project/list: To manage Locked Savings.

   • Use CCXT to handle deposits and save the data to a new table in the database.

3. User Input/Configuration:

   • Add a configuration option in the strategy file or UI (if applicable) where users can specify:
     • The asset they want to lend (e.g., BTC, ETH, USDT).
     • The amount to lend.
     • Whether to use Flexible Savings or Locked Savings.
     • A target interest rate or auto-renew preference (if applicable).

4. Behavior:

   • Periodically check for available lending opportunities using Binance's API.
   • Lend the specified amount of the selected asset automatically.
   • Notify the user of successful lending transactions or issues.

5. Example Workflow:

   • User selects BTC and specifies an amount of 0.01 to be lent using Flexible Savings.
   • The strategy uses the Binance API to check available products.
   • The script subscribes the amount and logs the transaction details.

---

Technical Requirements:

• Ensure proper handling of Binance API keys and secrets (use environment variables or secure storage).
• Implement robust error handling to manage API errors, rate limits, or asset unavailability.
• Comply with Binance's API documentation and terms of service.

---

References:

• [Binance API Documentation](https://binance-docs.github.io/apidocs/spot/en/#lending-endpoints)

---

Additional Notes:
This feature would expand Mr. Market's functionality by adding a low-risk, income-generating strategy that complements existing trading strategies. Let me know if you need more details or assistance with testing!

---

This issue request should provide a clear, actionable framework for the repository maintainers or contributors to implement the feature. It must include docs and tests