fix: getQuote & add SlippageTolerance in buildSwapCallData

src/core/uniDevKitV4.ts

@@ -188,6 +188,6 @@ export class UniDevKitV4 {
 	}
 
 	async buildSwapCallData(params: BuildSwapCallDataParams): Promise<Hex> {
-		return buildSwapCallData(params);
+		return buildSwapCallData(params, this.instance);
 	}
 }

src/test/utils/buildSwapCallData.test.ts

@@ -1,8 +1,19 @@
+import { createMockSdkInstance } from "@/test/helpers/sdkInstance";
 import { buildSwapCallData } from "@/utils/buildSwapCallData";
+import * as getQuoteModule from "@/utils/getQuote";
 import { Token } from "@uniswap/sdk-core";
 import { Pool } from "@uniswap/v4-sdk";
 import { type Address, zeroAddress } from "viem";
-import { describe, expect, it } from "vitest";
+import { describe, expect, it, vi } from "vitest";
+
+const sdkInstance = createMockSdkInstance();
+
+// Mock getQuote to return a fixed amount
+vi.spyOn(getQuoteModule, "getQuote").mockImplementation(async () => ({
+	amountOut: BigInt(1000000000000000000), // 1 WETH
+	estimatedGasUsed: BigInt(100000),
+	timestamp: Date.now(),
+}));
 
 describe("buildSwapCallData", () => {
 	// USDC and WETH on Mainnet
@@ -31,11 +42,11 @@ describe("buildSwapCallData", () => {
 		const params = {
 			tokenIn: mockTokens[0],
 			amountIn: BigInt(1000000), // 1 USDC
-			amountOutMin: BigInt(0),
+			slippageTolerance: 50,
 			pool: mockPool,
 		};
 
-		const calldata = await buildSwapCallData(params);
+		const calldata = await buildSwapCallData(params, sdkInstance);
 		expect(calldata).toBeDefined();
 		expect(calldata).toMatch(/^0x/); // Should be a hex string
 	});
@@ -44,11 +55,11 @@ describe("buildSwapCallData", () => {
 		const params = {
 			tokenIn: mockTokens[1],
 			amountIn: BigInt(1000000000000000000), // 1 WETH
-			amountOutMin: BigInt(0),
+			slippageTolerance: 50,
 			pool: mockPool,
 		};
 
-		const calldata = await buildSwapCallData(params);
+		const calldata = await buildSwapCallData(params, sdkInstance);
 		expect(calldata).toBeDefined();
 		expect(calldata).toMatch(/^0x/);
 	});
@@ -57,11 +68,11 @@ describe("buildSwapCallData", () => {
 		const params = {
 			tokenIn: mockTokens[0],
 			amountIn: BigInt(1000000),
-			amountOutMin: BigInt(500000), // 0.5 WETH minimum
+			slippageTolerance: 50,
 			pool: mockPool,
 		};
 
-		const calldata = await buildSwapCallData(params);
+		const calldata = await buildSwapCallData(params, sdkInstance);
 		expect(calldata).toBeDefined();
 		expect(calldata).toMatch(/^0x/);
 	});
@@ -70,11 +81,11 @@ describe("buildSwapCallData", () => {
 		const params = {
 			tokenIn: mockTokens[0],
 			amountIn: BigInt(1000000),
-			amountOutMin: BigInt(0),
+			slippageTolerance: 50,
 			pool: mockPool,
 		};
 
-		const calldata = await buildSwapCallData(params);
+		const calldata = await buildSwapCallData(params, sdkInstance);
 		expect(calldata).toBeDefined();
 		expect(calldata).toMatch(/^0x/);
 	});
@@ -83,11 +94,11 @@ describe("buildSwapCallData", () => {
 		const params = {
 			tokenIn: mockTokens[0],
 			amountIn: BigInt(1000000),
-			amountOutMin: BigInt(0),
+			slippageTolerance: 50,
 			pool: mockPool,
 		};
 
-		const calldata = await buildSwapCallData(params);
+		const calldata = await buildSwapCallData(params, sdkInstance);
 		expect(calldata).toBeDefined();
 		expect(calldata).toMatch(/^0x/);
 	});

src/test/utils/getQuote.test.ts

@@ -1,9 +1,20 @@
 import { createMockSdkInstance } from "@/test/helpers/sdkInstance";
 import { getQuote } from "@/utils/getQuote";
+import type { Pool } from "@uniswap/v4-sdk";
 import type { Abi } from "viem";
 import type { SimulateContractReturnType } from "viem/actions";
 import { describe, expect, it, vi } from "vitest";
 
+const mockPool: Pool = {
+	poolKey: {
+		currency0: "0x123",
+		currency1: "0x456",
+		fee: 3000,
+		tickSpacing: 10,
+		hooks: "0x",
+	},
+} as Pool;
+
 describe("getQuote", () => {
 	it("should throw error if SDK instance not found", async () => {
 		const mockDeps = createMockSdkInstance();
@@ -14,10 +25,9 @@ describe("getQuote", () => {
 		await expect(
 			getQuote(
 				{
-					tokens: ["0x123", "0x456"],
-					zeroForOne: true,
+					pool: mockPool,
 					amountIn: BigInt(1000000),
-					feeTier: 3000,
+					zeroForOne: true,
 				},
 				mockDeps,
 			),
@@ -32,10 +42,9 @@ describe("getQuote", () => {
 
 		const result = await getQuote(
 			{
-				tokens: ["0x123", "0x456"],
-				zeroForOne: true,
+				pool: mockPool,
 				amountIn: BigInt(1000000),
-				feeTier: 3000,
+				zeroForOne: true,
 			},
 			mockDeps,
 		);

src/types/utils/buildSwapCallData.ts

@@ -20,8 +20,8 @@ export type BuildSwapCallDataParams = {
 	tokenIn: Address;
 	/** Amount of input tokens to swap (in token's smallest unit) */
 	amountIn: bigint;
-	/** Minimum amount of output tokens to receive (in token's smallest unit) */
-	amountOutMin?: bigint;
 	/** Pool */
 	pool: Pool;
+	/** Slippage tolerance in basis points (e.g., 50 = 0.5%). Defaults to 50 (0.5%) */
+	slippageTolerance?: number;
 };

src/types/utils/getQuote.ts

@@ -1,24 +1,14 @@
-import type { FeeTier } from "@/types/utils/getPool";
-import type { Address, Hex } from "viem";
+import type { Pool } from "@uniswap/v4-sdk";
+import type { Hex } from "viem";
 
 /**
  * Parameters required for fetching a quote using the V4 Quoter contract.
  */
 export interface QuoteParams {
 	/**
-	 * Array of two token addresses representing the pair. The order will be handled internally.
+	 * The pool instance to quote from
 	 */
-	tokens: [Address, Address];
-
-	/**
-	 * The fee tier of the pool (e.g., FeeTier.MEDIUM).
-	 */
-	feeTier: FeeTier;
-
-	/**
-	 * The tick spacing for the pool. If not provided, it will be derived from the fee tier.
-	 */
-	tickSpacing?: number;
+	pool: Pool;
 
 	/**
 	 * The amount of tokens being swapped, expressed as a bigint.
@@ -30,11 +20,6 @@ export interface QuoteParams {
 	 */
 	zeroForOne: boolean;
 
-	/**
-	 * Address of the hooks contract, if any. Defaults to zero address if not provided.
-	 */
-	hooks?: Address;
-
 	/**
 	 * Optional additional data for the hooks, if any.
 	 */

src/utils/buildSwapCallData.ts

@@ -1,5 +1,8 @@
+import { calculateMinimumOutput } from "@/helpers/swap";
 import type { BuildSwapCallDataParams } from "@/types";
 import { COMMANDS } from "@/types";
+import type { UniDevKitV4Instance } from "@/types/core";
+import { getQuote } from "@/utils/getQuote";
 import { ethers } from "ethers";
 import type { Hex } from "viem";
 
@@ -21,8 +24,8 @@ import type { Hex } from "viem";
  * const swapParams = {
  *   tokenIn: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48", // USDC
  *   amountIn: parseUnits("100", 6), // 100 USDC
- *   amountOutMin: parseUnits("0.05", 18), // Min 0.05 WETH
  *   pool: pool,
+ *   slippageTolerance: 50, // 0.5%
  * };
  *
  * const calldata = await buildSwapCallData(swapParams);
@@ -37,13 +40,30 @@ import type { Hex } from "viem";
  */
 export async function buildSwapCallData(
 	params: BuildSwapCallDataParams,
+	instance: UniDevKitV4Instance,
 ): Promise<Hex> {
 	// Extract and set default parameters
-	const { tokenIn, amountIn, amountOutMin = 0n, pool } = params;
+	const { tokenIn, amountIn, pool, slippageTolerance = 50 } = params;
 
 	const zeroForOne =
 		tokenIn.toLowerCase() === pool.poolKey.currency0.toLowerCase();
 
+	// Get quote and calculate minimum output amount
+	const quote = await getQuote(
+		{
+			pool,
+			amountIn,
+			zeroForOne,
+		},
+		instance,
+	);
+
+	// Calculate minimum output amount based on slippage
+	const amountOutMin = calculateMinimumOutput(
+		quote.amountOut,
+		slippageTolerance,
+	);
+
 	// Encode Universal Router commands
 	const commands = ethers.utils.solidityPack(
 		["uint8"],
@@ -66,7 +86,7 @@ export async function buildSwapCallData(
 				poolKey: pool.poolKey,
 				zeroForOne,
 				amountIn: ethers.BigNumber.from(amountIn.toString()),
-				amountOutMinimum: ethers.BigNumber.from(amountOutMin.toString()),
+				amountOutMinimum: amountOutMin,
 				hookData: "0x",
 			},
 		],

src/utils/getQuote.ts

@@ -1,20 +1,15 @@
 import V4QuoterAbi from "@/constants/abis/V4Quoter";
-import { sortTokens } from "@/helpers/tokens";
 import type { UniDevKitV4Instance } from "@/types/core";
-import { FeeTier, TICK_SPACING_BY_FEE } from "@/types/utils/getPool";
 import type { QuoteParams, QuoteResponse } from "@/types/utils/getQuote";
-import { zeroAddress } from "viem";
 
 /**
  * Fetches a quote for a token swap using the V4 Quoter contract.
- * This function constructs the pool key from the given tokens and parameters,
- * and then simulates the quote to estimate the output amount.
+ * This function uses the provided pool instance to simulate the quote.
  *
- * @param params - The parameters required for the quote, including tokens, fee tier, tick spacing, and amount.
- * @param chainId - (Optional) The chain ID to use. If only one instance is registered, this is not required.
+ * @param params - The parameters required for the quote, including pool and amount.
+ * @param instance - UniDevKitV4 instance for contract interaction
  * @returns A Promise that resolves to the quote result, including the amount out and gas estimate.
  * @throws Will throw an error if:
- * - SDK instance is not found
  * - Simulation fails (e.g., insufficient liquidity, invalid parameters)
  * - Contract call reverts
  */
@@ -24,30 +19,20 @@ export async function getQuote(
 ): Promise<QuoteResponse> {
 	const { client, contracts } = instance;
 	const { quoter } = contracts;
+	const {
+		pool: { poolKey },
+	} = params;
 
 	try {
-		// Sort tokens to ensure consistent pool key ordering
-		const [currency0, currency1] = sortTokens(
-			params.tokens[0],
-			params.tokens[1],
-		);
-
-		// Use provided tick spacing or derive from fee tier
-		const fee = (params.feeTier ?? FeeTier.MEDIUM) as FeeTier;
-		const tickSpacing = params.tickSpacing ?? TICK_SPACING_BY_FEE[fee];
-
-		// Construct the poolKey
-		const poolKey = {
-			currency0,
-			currency1,
-			fee,
-			tickSpacing,
-			hooks: params.hooks || zeroAddress,
-		};
-
 		// Build the parameters for quoteExactInputSingle
 		const quoteParams = {
-			poolKey,
+			poolKey: {
+				currency0: poolKey.currency0 as `0x${string}`,
+				currency1: poolKey.currency1 as `0x${string}`,
+				fee: poolKey.fee,
+				tickSpacing: poolKey.tickSpacing,
+				hooks: poolKey.hooks as `0x${string}`,
+			},
 			zeroForOne: params.zeroForOne,
 			exactAmount: params.amountIn,
 			hookData: params.hookData || "0x",