feat(univ4): Refactor input and handle single swap case

Construct the uniswap v4 specific objects inside the executor
The swap test in the executor alone doesn't work anymore because of the callback data prepended to the rest of he calldata

--- don't change below this line ---
ENG-4222 Took 4 hours 0 minutes


Took 40 seconds

foundry/test/executors/UniswapV4Utils.sol

@@ -7,40 +7,31 @@ library UniswapV4Utils {
     function encodeExactInputSingle(
         address tokenIn,
         address tokenOut,
-        uint24 fee,
+        uint256 amountOutMin,
         bool zeroForOne,
-        uint24 tickSpacing,
-        uint128 amountIn
+        address callbackExecutor,
+        bytes4 callbackSelector,
+        UniswapV4Executor.UniswapV4Pool[] memory pools
     ) public pure returns (bytes memory) {
-        PoolKey memory key = PoolKey({
-            currency0: Currency.wrap(zeroForOne ? tokenIn : tokenOut),
-            currency1: Currency.wrap(zeroForOne ? tokenOut : tokenIn),
-            fee: fee,
-            tickSpacing: int24(tickSpacing),
-            hooks: IHooks(address(0))
-        });
+        bytes memory encodedPools;
 
-        bytes memory actions = abi.encodePacked(
-            uint8(Actions.SWAP_EXACT_IN_SINGLE),
-            uint8(Actions.SETTLE_ALL),
-            uint8(Actions.TAKE_ALL)
+        for (uint256 i = 0; i < pools.length; i++) {
+            encodedPools = abi.encodePacked(
+                encodedPools,
+                pools[i].intermediaryToken,
+                bytes3(pools[i].fee),
+                pools[i].tickSpacing
+            );
+        }
+
+        return abi.encodePacked(
+            tokenIn,
+            tokenOut,
+            amountOutMin,
+            zeroForOne,
+            callbackExecutor,
+            bytes4(callbackSelector),
+            encodedPools
         );
-
-        bytes[] memory params = new bytes[](3);
-
-        params[0] = abi.encode(
-            IV4Router.ExactInputSingleParams({
-                poolKey: key,
-                zeroForOne: zeroForOne,
-                amountIn: amountIn,
-                amountOutMinimum: 0,
-                hookData: bytes("")
-            })
-        );
-
-        params[1] = abi.encode(key.currency0, amountIn);
-        params[2] = abi.encode(key.currency1, 0);
-
-        return abi.encode(actions, params);
     }
 }