Update PiUSD.sol

blockchain_integration/pi_network/pi-stablecoin/contracts/PiUSD.sol

@@ -1,9 +1,11 @@
 pragma solidity ^0.6.0;
 
 import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/math/SafeMath.sol";
+import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/token/ERC20/SafeERC20.sol";
 
 contract PiUSD {
     using SafeMath for uint256;
+    using SafeERC20 for IERC20;
 
     // Total supply of PiUSD tokens
     uint256 public totalSupply = 100000000; // 100 million tokens
@@ -67,4 +69,72 @@ contract PiUSD {
         // Emit the GovernanceUpdated event
         emit GovernanceUpdated(newGovernanceAddress);
     }
+
+    // Oracle integration for price feeds
+    address public oracleAddress;
+
+    function updateOracleAddress(address newOracleAddress) public {
+        // Check if the user is authorized to update the oracle address
+        require(msg.sender == governanceAddress, "Unauthorized access");
+
+        // Update the oracle address
+        oracleAddress = newOracleAddress;
+
+        // Emit the OracleUpdated event
+        emit OracleUpdated(newOracleAddress);
+    }
+
+    // Price feed mechanism
+    function getPriceFeed() public view returns (uint256) {
+        // Get the current price feed from the oracle
+        uint256 priceFeed = IOracle(oracleAddress).getPriceFeed();
+
+        // Return the price feed
+        return priceFeed;
+    }
+
+    // Liquidity provision mechanism
+    function provideLiquidity(uint256 amount) public {
+        // Check if the user has sufficient PiUSD tokens
+        require(balances[msg.sender] >= amount, "Insufficient PiUSD tokens");
+
+        // Transfer the PiUSD tokens to the liquidity pool
+        IERC20(PiUSD).transferFrom(msg.sender, address(this), amount);
+
+        // Emit the LiquidityProvided event
+        emit LiquidityProvided(msg.sender, amount);
+    }
+
+    // Decentralized exchange integration
+    address public dexAddress;
+
+    function updateDexAddress(address newDexAddress) public {
+        // Check if the user is authorized to update the dex address
+        require(msg.sender == governanceAddress, "Unauthorized access");
+
+        // Update the dex address
+        dexAddress = newDexAddress;
+
+        // Emit the DexUpdated event
+        emit DexUpdated(newDexAddress);
+    }
+
+    // Trading mechanism
+    function trade(uint256 amount) public {
+        // Check if the user has sufficient PiUSD tokens
+        require(balances[msg.sender] >= amount, "Insufficient PiUSD tokens");
+
+        // Get the current price feed from the oracle
+        uint256 priceFeed = getPriceFeed();
+
+        // Calculate the trade amount based on the price feed
+        uint256 tradeAmount = amount.mul(priceFeed).div(100);
+
+        // Transfer the PiUSD tokens to the dex
+        IERC20(PiUSD).transferFrom(msg.sender, dexAddress, tradeAmount);
+
+        // Emit the Trade event
+        emit Trade(msg.sender, tradeAmount);
+    }
 }
+``