Create LendingProtocol.sol

blockchain_integration/pi_network/DeFi_Integration/LendingProtocol.sol

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+pragma solidity ^0.8.0;
+
+import {DeFiIntegration} from "./DeFiIntegration.sol";
+import {ERC20} from "./ERC20.sol";
+
+contract LendingProtocol {
+    // Mapping of lenders to their corresponding lending balances
+    mapping (address => uint256) public lendingBalances;
+
+    // Mapping of borrowers to their corresponding borrowing balances
+    mapping (address => uint256) public borrowingBalances;
+
+    // Event emitted when a lender deposits Pi Coin into the lending protocol
+    event LenderDeposit(address indexed lender, uint256 amount);
+
+    // Event emitted when a borrower borrows Pi Coin from the lending protocol
+    event BorrowerBorrow(address indexed borrower, uint256 amount);
+
+    // Event emitted when a borrower repays a loan on the lending protocol
+    event BorrowerRepay(address indexed borrower, uint256 amount);
+
+    // Function to deposit Pi Coin into the lending protocol
+    function deposit(uint256 _amount) public {
+        // Transfer Pi Coin from lender to lending protocol
+        DeFiIntegration.transferFrom(msg.sender, address(this), _amount);
+
+        // Update lender's lending balance
+        lendingBalances[msg.sender] += _amount;
+
+        // Emit lender deposit event
+        emit LenderDeposit(msg.sender, _amount);
+    }
+
+    // Function to borrow Pi Coin from the lending protocol
+    function borrow(uint256 _amount) public {
+        // Check if borrowing protocol has sufficient liquidity
+        require(lendingBalances[msg.sender] >= _amount, "Insufficient liquidity");
+
+        // Transfer Pi Coin from lending protocol to borrower
+        DeFiIntegration.transfer(msg.sender, _amount);
+
+        // Update borrower's borrowing balance
+        borrowingBalances[msg.sender] += _amount;
+
+        // Emit borrower borrow event
+        emit BorrowerBorrow(msg.sender, _amount);
+    }
+
+    // Function to repay a loan on the lending protocol
+    function repay(uint256 _amount) public {
+        // Check if borrower has sufficient DeFi balance
+        require(DeFiIntegration.defiBalances[msg.sender] >= _amount, "Insufficient DeFi balance");
+
+        // Transfer Pi Coin from borrower to lending protocol
+        DeFiIntegration.transferFrom(msg.sender, address(this), _amount);
+
+        // Update borrower's borrowing balance
+        borrowingBalances[msg.sender] -= _amount;
+
+        // Emit borrower repay event
+        emit BorrowerRepay(msg.sender, _amount);
+    }
+}