added place order function ✅

src/TakeProfitHook.sol

@@ -7,9 +7,12 @@ import {IPoolManager} from "v4-core/interfaces/IPoolManager.sol";
 import {Hooks} from "v4-core/libraries/Hooks.sol";
 import {PoolId, PoolIdLibrary} from "v4-core/types/PoolId.sol";
 import {PoolKey} from "v4-core/types/PoolKey.sol";
+import {Currency, CurrencyLibrary} from "v4-core/types/Currency.sol";
+import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 
 contract TakeProfitsHook is BaseHook, ERC1155 {
     using PoolIdLibrary for PoolKey;
+    using CurrencyLibrary for Currency;
 
     mapping(PoolId poolId => int24 tickLower) public tickLowerLasts;
     mapping(PoolId poolId => mapping(int24 tick => mapping(bool zeroForOne => int256 amount)))
@@ -75,6 +78,44 @@ contract TakeProfitsHook is BaseHook, ERC1155 {
         return intervals * tickSpacing;
     }
 
+    // Core Utility Place Order
+    function placeOrder(
+        PoolKey calldata key,
+        int24 tick,
+        uint256 amountIn,
+        bool zeroForOne
+    ) external returns (int24) {
+        int24 tickLower = _getTickLower(tick, key.tickSpacing);
+        takeProfitPositions[key.toId()][tickLower][zeroForOne] += int256(
+            amountIn
+        );
+
+        uint256 tokenId = getTokenId(key, tickLower, zeroForOne);
+
+        // If token id doesn't already exist, add it to the mapping
+        // Not every order creates a new token id, as it's possible for users to add more tokens to a pre-existing order
+        if (!tokenIdExists[tokenId]) {
+            tokenIdExists[tokenId] = true;
+            tokenIdData[tokenId] = TokenData(key, tickLower, zeroForOne);
+        }
+
+        // Mint ERC-1155 tokens to the user
+        _mint(msg.sender, tokenId, amountIn, "");
+        tokenIdTotalSupply[tokenId] += amountIn;
+
+        // Extract the address of the token the user wants to sell
+        address tokenToBeSoldContract = zeroForOne
+            ? Currency.unwrap(key.currency0)
+            : Currency.unwrap(key.currency1);
+        // Move the tokens to be sold from the user to this contract
+        IERC20(tokenToBeSoldContract).transferFrom(
+            msg.sender,
+            address(this),
+            amountIn
+        );
+        return tickLower;
+    }
+
     // ERc115 helpers
 
     function getTokenId(