Create DeFiIntegration.sol

blockchain_integration/pi_network/DeFi_Integration/DeFiIntegration.sol

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+pragma solidity ^0.8.0;
+
+import {ERC20} from "./ERC20.sol";
+import {PiCoin} from "./PiCoin.sol";
+
+contract DeFiIntegration {
+    // Mapping of user addresses to their corresponding DeFi balances
+    mapping (address => uint256) public defiBalances;
+
+    // Event emitted when a user deposits Pi Coin into the DeFi protocol
+    event Deposit(address indexed user, uint256 amount);
+
+    // Event emitted when a user withdraws Pi Coin from the DeFi protocol
+    event Withdrawal(address indexed user, uint256 amount);
+
+    // Event emitted when a user borrows Pi Coin from the DeFi protocol
+    event Borrow(address indexed user, uint256 amount);
+
+    // Event emitted when a user repays a loan on the DeFi protocol
+    event Repayment(address indexed user, uint256 amount);
+
+    // Function to deposit Pi Coin into the DeFi protocol
+    function deposit(uint256 _amount) public {
+        // Transfer Pi Coin from user to DeFi protocol
+        PiCoin.transferFrom(msg.sender, address(this), _amount);
+
+        // Update user's DeFi balance
+        defiBalances[msg.sender] += _amount;
+
+        // Emit deposit event
+        emit Deposit(msg.sender, _amount);
+    }
+
+    // Function to withdraw Pi Coin from the DeFi protocol
+    function withdraw(uint256 _amount) public {
+        // Check if user has sufficient DeFi balance
+        require(defiBalances[msg.sender] >= _amount, "Insufficient DeFi balance");
+
+        // Transfer Pi Coin from DeFi protocol to user
+        PiCoin.transfer(msg.sender, _amount);
+
+        // Update user's DeFi balance
+        defiBalances[msg.sender] -= _amount;
+
+        // Emit withdrawal event
+        emit Withdrawal(msg.sender, _amount);
+    }
+
+    // Function to borrow Pi Coin from the DeFi protocol
+    function borrow(uint256 _amount) public {
+        // Check if user has sufficient collateral
+        require(ERC20.balanceOf(msg.sender) >= _amount, "Insufficient collateral");
+
+        // Transfer Pi Coin from DeFi protocol to user
+        PiCoin.transfer(msg.sender, _amount);
+
+        // Update user's DeFi balance
+        defiBalances[msg.sender] += _amount;
+
+        // Emit borrow event
+        emit Borrow(msg.sender, _amount);
+    }
+
+    // Function to repay a loan on the DeFi protocol
+    function repay(uint256 _amount) public {
+        // Check if user has sufficient DeFi balance
+        require(defiBalances[msg.sender] >= _amount, "Insufficient DeFi balance");
+
+        // Transfer Pi Coin from user to DeFi protocol
+        PiCoin.transferFrom(msg.sender, address(this), _amount);
+
+        // Update user's DeFi balance
+        defiBalances[msg.sender] -= _amount;
+
+        // Emit repayment event
+        emit Repayment(msg.sender, _amount);
+    }
+}