Refactor swap, add errors

primitives/swap/src/error.rs

@@ -0,0 +1,26 @@
+#[derive(Debug, PartialEq, Eq)]
+pub enum SwapError {
+    /// The provided amount is insufficient for the swap.
+    InsufficientInputAmount,
+
+    /// The provided liquidity is insufficient for the operation.
+    InsufficientLiquidity,
+
+    /// The operation would exceed the price limit.
+    PriceLimitExceeded,
+
+    /// The caller does not have enough balance for the operation.
+    InsufficientBalance,
+
+    /// Attempted to remove liquidity that does not exist.
+    LiquidityNotFound,
+
+    /// The provided tick range is invalid.
+    InvalidTickRange,
+
+    /// Maximum user positions exceeded
+    MaxPositionsExceeded,
+
+    /// Too many swap steps
+    TooManySwapSteps,
+}