feat: add permit single to swapCallData

README.md

@@ -125,14 +125,40 @@ const poolKey = await uniDevKit.getPoolKeyFromPoolId({
 ```
 
 ### `buildSwapCallData`
-Construct calldata and value for a Universal Router swap.
+Construct calldata for a Universal Router swap.
 ```ts
+// Basic swap
 const { calldata, value } = await uniDevKit.buildSwapCallData({
-  tokenIn,
-  tokenOut,
-  amountIn: "1000000000000000000",
-  recipient,
-  slippageBips: 50
+  tokenIn: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48", // USDC
+  amountIn: parseUnits("100", 6), // 100 USDC
+  pool: pool,
+  slippageTolerance: 50, // 0.5%
+  recipient: "0x..."
+});
+
+// Swap with permit2
+const permitData = await uniDevKit.preparePermit2Data({
+  token: tokenIn,
+  spender: uniDevKit.getContractAddress('universalRouter'),
+  owner: userAddress
+});
+
+const signature = await signer._signTypedData(permitData.toSign);
+const permitWithSignature = permitData.buildPermit2DataWithSignature(signature);
+
+const { calldata: calldataWithPermit, value: valueWithPermit } = await uniDevKit.buildSwapCallData({
+  tokenIn: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
+  amountIn: parseUnits("100", 6),
+  pool: pool,
+  slippageTolerance: 50,
+  recipient: "0x...",
+  permit2Signature: permitWithSignature
+});
+
+const tx = await sendTransaction({
+  to: uniDevKit.getContractAddress('universalRouter'),
+  data: calldata,
+  value
 });
 ```
 
@@ -208,4 +234,4 @@ See [CONTRIBUTING.md](./CONTRIBUTING.md) for guidelines.
 - Releases are automated with [semantic-release](https://semantic-release.gitbook.io/semantic-release/).
 
 ## License
-MIT
+MIT

package.json

@@ -1,6 +1,6 @@
 {
   "name": "uniswap-dev-kit",
-  "version": "1.0.9",
+  "version": "1.0.10",
   "description": "A modern TypeScript library for integrating Uniswap into your dapp.",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

src/core/uniDevKitV4.ts

@@ -16,7 +16,9 @@ import type { GetTokensParams } from "@/types/utils/getTokens";
 import type {
 	PreparePermit2BatchDataParams,
 	PreparePermit2BatchDataResult,
-} from "@/types/utils/preparePermit2BatchData";
+	PreparePermit2DataParams,
+	PreparePermit2DataResult,
+} from "@/types/utils/permit2";
 import { buildAddLiquidityCallData } from "@/utils/buildAddLiquidityCallData";
 import { buildSwapCallData } from "@/utils/buildSwapCallData";
 import { getPool } from "@/utils/getPool";
@@ -25,9 +27,10 @@ import { getPosition } from "@/utils/getPosition";
 import { getQuote } from "@/utils/getQuote";
 import { getTokens } from "@/utils/getTokens";
 import { preparePermit2BatchData } from "@/utils/preparePermit2BatchData";
+import { preparePermit2Data } from "@/utils/preparePermit2Data";
 import type { Currency } from "@uniswap/sdk-core";
 import type { Pool, PoolKey } from "@uniswap/v4-sdk";
-import type { Abi, Address, Hex, PublicClient } from "viem";
+import type { Abi, Address, PublicClient } from "viem";
 import { http, createPublicClient } from "viem";
 
 /**
@@ -208,7 +211,7 @@ export class UniDevKitV4 {
 	 * @returns Promise resolving to swap call data including calldata and value
 	 * @throws Error if SDK instance is not found or if swap call data is invalid
 	 */
-	async buildSwapCallData(params: BuildSwapCallDataParams): Promise<Hex> {
+	async buildSwapCallData(params: BuildSwapCallDataParams) {
 		return buildSwapCallData(params, this.instance);
 	}
 
@@ -236,4 +239,17 @@ export class UniDevKitV4 {
 	): Promise<PreparePermit2BatchDataResult> {
 		return preparePermit2BatchData(params, this.instance);
 	}
+
+	/**
+	 * Prepares the permit2 simple data for a single token. (Used to swap)
+	 * Use toSign.values to sign the permit2 simple data.
+	 * @param params @type {PreparePermit2DataParams}
+	 * @returns Promise resolving to permit2 simple data
+	 * @throws Error if SDK instance is not found or if permit2 simple data is invalid
+	 */
+	async preparePermit2Data(
+		params: PreparePermit2DataParams,
+	): Promise<PreparePermit2DataResult> {
+		return preparePermit2Data(params, this.instance);
+	}
 }

src/test/utils/buildSwapCallData.test.ts

@@ -44,6 +44,7 @@ describe("buildSwapCallData", () => {
 			amountIn: BigInt(1000000), // 1 USDC
 			slippageTolerance: 50,
 			pool: mockPool,
+			recipient: zeroAddress,
 		};
 
 		const calldata = await buildSwapCallData(params, sdkInstance);
@@ -57,6 +58,7 @@ describe("buildSwapCallData", () => {
 			amountIn: BigInt(1000000000000000000), // 1 WETH
 			slippageTolerance: 50,
 			pool: mockPool,
+			recipient: zeroAddress,
 		};
 
 		const calldata = await buildSwapCallData(params, sdkInstance);
@@ -70,6 +72,7 @@ describe("buildSwapCallData", () => {
 			amountIn: BigInt(1000000),
 			slippageTolerance: 50,
 			pool: mockPool,
+			recipient: zeroAddress,
 		};
 
 		const calldata = await buildSwapCallData(params, sdkInstance);
@@ -83,6 +86,7 @@ describe("buildSwapCallData", () => {
 			amountIn: BigInt(1000000),
 			slippageTolerance: 50,
 			pool: mockPool,
+			recipient: zeroAddress,
 		};
 
 		const calldata = await buildSwapCallData(params, sdkInstance);
@@ -96,6 +100,7 @@ describe("buildSwapCallData", () => {
 			amountIn: BigInt(1000000),
 			slippageTolerance: 50,
 			pool: mockPool,
+			recipient: zeroAddress,
 		};
 
 		const calldata = await buildSwapCallData(params, sdkInstance);

src/types/utils/buildSwapCallData.ts

@@ -1,15 +1,17 @@
+import type { PermitSingle } from "@uniswap/permit2-sdk";
 import type { Pool } from "@uniswap/v4-sdk";
-import type { Address } from "viem";
+import type { Address, Hex } from "viem";
 
 /**
  * Command codes for Universal Router operations
  * @see https://docs.uniswap.org/contracts/universal-router/technical-reference
  */
 export const COMMANDS = {
+	PERMIT2_PERMIT: 0x0a,
 	SWAP_EXACT_IN_SINGLE: 0x06,
 	SETTLE_ALL: 0x0c,
 	TAKE_ALL: 0x0f,
-	V4_ROUTER_EXECUTE: 0x10,
+	V4_SWAP: 0x10,
 } as const;
 
 /**
@@ -24,4 +26,12 @@ export type BuildSwapCallDataParams = {
 	pool: Pool;
 	/** Slippage tolerance in basis points (e.g., 50 = 0.5%). Defaults to 50 (0.5%) */
 	slippageTolerance?: number;
+	/** Recipient address */
+	recipient: Address;
+	/** Permit2 signature */
+	permit2Signature?: {
+		signature: Hex;
+		owner: Address;
+		permit: PermitSingle;
+	};
 };

src/types/utils/permit2.ts

@@ -0,0 +1,84 @@
+import type { PermitBatch, PermitSingle } from "@uniswap/permit2-sdk";
+import type { BatchPermitOptions } from "@uniswap/v4-sdk";
+import type { TypedDataField } from "ethers";
+import type { Address, Hex } from "viem";
+
+/**
+ * Base interface for Permit2 data
+ */
+interface BasePermit2Data {
+	/** Address that will be allowed to spend the tokens */
+	spender: Address | string;
+	/** User's wallet address */
+	owner: Address | string;
+	/** Signature deadline in seconds */
+	sigDeadline?: number;
+}
+
+/**
+ * Interface for the parameters required to generate a Permit2 batch signature
+ */
+export interface PreparePermit2BatchDataParams extends BasePermit2Data {
+	/** Array of token addresses to permit */
+	tokens: (Address | string)[];
+}
+
+/**
+ * Interface for the parameters required to generate a single Permit2 signature
+ */
+export interface PreparePermit2DataParams extends BasePermit2Data {
+	/** Token address to permit */
+	token: Address | string;
+}
+
+/**
+ * Base interface for Permit2 data result
+ */
+interface BasePermit2DataResult {
+	/** User's wallet address */
+	owner: Address | string;
+	/** Data needed to sign the permit2 data */
+	toSign: {
+		/** Domain of the permit2 data */
+		domain: {
+			name: string;
+			version: string;
+			chainId: number;
+			verifyingContract: `0x${string}`;
+		};
+		/** Types of the permit2 data */
+		types: Record<string, TypedDataField[]>;
+		/** Values of the permit2 data */
+		values: PermitBatch | PermitSingle;
+		/** Primary type of the permit2 data */
+		primaryType: "PermitBatch" | "PermitSingle";
+		/** Message of the permit2 data */
+		message: Record<string, unknown>;
+	};
+}
+
+/**
+ * Interface for the return value of the batch permit function
+ */
+export interface PreparePermit2BatchDataResult extends BasePermit2DataResult {
+	/** Function to build the permit2 batch data with a signature */
+	buildPermit2BatchDataWithSignature: (
+		signature: string | Hex,
+	) => BatchPermitOptions;
+	/** Permit2 batch data */
+	permitBatch: PermitBatch;
+}
+
+/**
+ * Interface for the return value of the single permit function
+ */
+export interface PreparePermit2DataResult extends BasePermit2DataResult {
+	/** Function to build the permit2 data with a signature */
+	buildPermit2DataWithSignature: (signature: Hex) => {
+		owner: Address;
+		permit: PermitSingle;
+		signature: Hex;
+	};
+	/** Permit2 data */
+	permit: PermitSingle;
+}