Create LiquidityPool.sol

blockchain_integration/pi_network/features/pi-coin-listing-and-liquidity/LiquidityPool.sol

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+pragma solidity ^0.8.0;
+
+import "./LiquidityProvider.sol";
+
+contract LiquidityPool {
+    using LiquidityProvider for address;
+
+    // Mapping of liquidity providers
+    mapping (address => LiquidityProvider) public liquidityProviders;
+
+    // Event emitted when a new liquidity provider joins the pool
+    event NewLiquidityProvider(address indexed provider);
+
+    // Function to join the liquidity pool
+    function joinLiquidityPool() public {
+        LiquidityProvider storage provider = liquidityProviders[msg.sender];
+        provider.provideLiquidity(1000); // Initial liquidity provision
+        emit NewLiquidityProvider(msg.sender);
+    }
+
+    // Function to get the total liquidity level
+    function getTotalLiquidityLevel() public view returns (uint256) {
+        uint256 totalLiquidity = 0;
+        for (address provider in liquidityProviders) {
+            totalLiquidity += liquidityProviders[provider].getLiquidityLevel();
+        }
+        return totalLiquidity;
+    }
+}