> For the complete documentation index, see [llms.txt](https://andrewkimjoseph.gitbook.io/celina-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://andrewkimjoseph.gitbook.io/celina-sdk/services/uniswapservice.md).

# UniswapService

[**@andrewkimjoseph/celina-sdk**](/celina-sdk/api-reference/api-reference.md)

***

[@andrewkimjoseph/celina-sdk](/celina-sdk/api-reference/api-reference.md) / [services/uniswap.service](https://github.com/andrewkimjoseph/celina-sdk/blob/main/docs/api-reference/services/uniswap.service/README.md) / UniswapService

## Class: UniswapService

Defined in: [src/services/uniswap.service.ts:95](https://github.com/andrewkimjoseph/celina-sdk/blob/970ab720c805303ead8b20406c6579ecdcf2193a/src/services/uniswap.service.ts#L95)

Uniswap v4 quotes, gas estimates, and `prepareSwap` flows on Celo mainnet.

### Constructors

#### Constructor

> **new UniswapService**(`clientFactory`): `UniswapService`

Defined in: [src/services/uniswap.service.ts:98](https://github.com/andrewkimjoseph/celina-sdk/blob/970ab720c805303ead8b20406c6579ecdcf2193a/src/services/uniswap.service.ts#L98)

**Parameters**

**clientFactory**

`CeloClientFactory`

**Returns**

`UniswapService`

### Methods

#### estimateSwap()

> **estimateSwap**(`from`, `tokenIn`, `tokenOut`, `amount`, `params?`): `Promise`<{ `amountIn`: `string`; `amountOutMin`: `string`; `approvalGas`: `string`\[]; `approvalStepsNeeded`: `number`; `deadline`: `string`; `deadlineMinutes`: `number`; `expectedOut`: `string`; `from`: `` `0x${string}` ``; `indexSource`: `string` | `undefined`; `network`: `"mainnet"`; `protocol`: `"uniswap_v4"`; `recipient`: `` `0x${string}` ``; `routeHops`: `number`; `slippageTolerance`: `number`; `swapGas`: `string` | `undefined`; `swapGasEstimated`: `boolean`; `tokenIn`: `string`; `tokenOut`: `string`; }>

Defined in: [src/services/uniswap.service.ts:428](https://github.com/andrewkimjoseph/celina-sdk/blob/970ab720c805303ead8b20406c6579ecdcf2193a/src/services/uniswap.service.ts#L428)

Simulate gas for a Uniswap v4 swap from `from`, including Permit2 approvals when needed.

**Parameters**

**from**

`` `0x${string}` ``

Sender wallet address

**tokenIn**

`string`

Input token symbol or address

**tokenOut**

`string`

Output token symbol or address

**amount**

`string`

Human-readable input amount

**params?**

[`UniswapSwapParams`](/celina-sdk/types/uniswapswapparams.md)

Optional slippage, deadline, and recipient

**Returns**

`Promise`<{ `amountIn`: `string`; `amountOutMin`: `string`; `approvalGas`: `string`\[]; `approvalStepsNeeded`: `number`; `deadline`: `string`; `deadlineMinutes`: `number`; `expectedOut`: `string`; `from`: `` `0x${string}` ``; `indexSource`: `string` | `undefined`; `network`: `"mainnet"`; `protocol`: `"uniswap_v4"`; `recipient`: `` `0x${string}` ``; `routeHops`: `number`; `slippageTolerance`: `number`; `swapGas`: `string` | `undefined`; `swapGasEstimated`: `boolean`; `tokenIn`: `string`; `tokenOut`: `string`; }>

***

#### getSwapQuote()

> **getSwapQuote**(`tokenIn`, `tokenOut`, `amount`, `_from?`): `Promise`<{ `amountIn`: `string`; `expectedOut`: `string`; `indexSource`: `string` | `undefined`; `network`: `"mainnet"`; `protocol`: `"uniswap_v4"`; `route`: { `pools`: `UniswapPoolKey`\[]; }; `routeHops`: `number`; `tokenIn`: `string`; `tokenOut`: `string`; }>

Defined in: [src/services/uniswap.service.ts:394](https://github.com/andrewkimjoseph/celina-sdk/blob/970ab720c805303ead8b20406c6579ecdcf2193a/src/services/uniswap.service.ts#L394)

Expected Uniswap v4 output for a token pair — no wallet required.

**Parameters**

**tokenIn**

`string`

Input token symbol or address

**tokenOut**

`string`

Output token symbol or address

**amount**

`string`

Human-readable input amount

**\_from?**

`` `0x${string}` ``

Deprecated; ignored. Balance checks run on prepare/estimate only.

**Returns**

`Promise`<{ `amountIn`: `string`; `expectedOut`: `string`; `indexSource`: `string` | `undefined`; `network`: `"mainnet"`; `protocol`: `"uniswap_v4"`; `route`: { `pools`: `UniswapPoolKey`\[]; }; `routeHops`: `number`; `tokenIn`: `string`; `tokenOut`: `string`; }>

***

#### prepareSwap()

> **prepareSwap**(`from`, `tokenIn`, `tokenOut`, `amount`, `params?`): `Promise`<[`SerializedPreparedFlow`](/celina-sdk/types/serializedpreparedflow.md)>

Defined in: [src/services/uniswap.service.ts:520](https://github.com/andrewkimjoseph/celina-sdk/blob/970ab720c805303ead8b20406c6579ecdcf2193a/src/services/uniswap.service.ts#L520)

Build unsigned Uniswap v4 steps (ERC-20 approve → Permit2 approve → swap when needed).

**Parameters**

**from**

`` `0x${string}` ``

Sender wallet address

**tokenIn**

`string`

Input token symbol or address

**tokenOut**

`string`

Output token symbol or address

**amount**

`string`

Human-readable input amount

**params?**

[`UniswapSwapParams`](/celina-sdk/types/uniswapswapparams.md)

Optional slippage, deadline, and recipient

**Returns**

`Promise`<[`SerializedPreparedFlow`](/celina-sdk/types/serializedpreparedflow.md)>

1–3 step `SerializedPreparedFlow` for sequential wallet signing


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