​
Import

import { useSwapModal } from '@0xsequence/checkout'

​
Usage

import { useSwapModal } from '@0xsequence/checkout'
import { encodeFunctionData, parseAbi } from 'viem'

function App() {
  const { openSwapModal } = useSwapModal()
  
  const handleSwap = () => {
    // Target token information
    const chainId = 137 // Polygon
    const toTokenAddress = '0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359' // USDC on Polygon
    const toTokenAmount = '20000' // 0.02 USDC (in smallest units)
    
    // Optional: Transaction to execute after swap is completed
    const data = encodeFunctionData({ 
      abi: parseAbi(['function demo()']), 
      functionName: 'demo', 
      args: [] 
    })
    
    // Open the swap modal
    openSwapModal({
      onSuccess: () => {
        console.log('swap successful!')
      },
      chainId,
      toTokenAddress,
      toTokenAmount,
      postSwapTransactions: [
        {
          to: '0x37470dac8a0255141745906c972e414b1409b470',
          data
        }
      ],
      title: 'Swap and Pay',
      description: 'Select a token in your wallet to swap to 0.2 USDC.'
    })
  }
  
  return (
    <button onClick={handleSwap}>
      Swap with Sequence Pay
    </button>
  )
}

​
Return Type: UseSwapModalReturnType

The hook returns an object with the following properties: 
type UseSwapModalReturnType = {
  openSwapModal: (settings: SwapModalSettings) => void
  closeSwapModal: () => void
  swapModalSettings: SwapModalSettings | undefined
}

​
Properties

​
openSwapModal

(settings: SwapModalSettings) => void Function to open the Swap modal with the specified settings. Parameters: The settings object can include the following properties:
ParameterTypeDescription
chainIdnumberBlockchain network ID where the swap will occur
toTokenAddressstringAddress of the target token contract
toTokenAmountstringAmount of the target token in smallest units
postSwapTransactionsArray<{to: string, data: string}>(Optional) Transactions to execute after the swap completes
disableMainCurrencyboolean(Optional) If true, disables swapping using the main currency of the chain
titlestring(Optional) Custom title for the swap modal
descriptionstring(Optional) Custom description for the swap modal
onSuccess() => void(Optional) Callback when swap is successful
onError(error: Error) => void(Optional) Callback when an error occurs
onClose() => void(Optional) Callback when the modal is closed
blockConfirmationsnumber(Optional) Number of block confirmations to wait for the swap to complete

​
closeSwapModal

() => void Function to close the Swap modal.

​
swapModalSettings

SwapModalSettings | undefined The current settings configuration for the Swap modal. 
export interface SwapModalSettings {
  chainId: number
  toTokenAddress: string
  toTokenAmount: string
  title?: string
  description?: string
  disableMainCurrency?: boolean
  postSwapTransactions?: Transaction[]
  blockConfirmations?: number
  onSuccess?: (txHash: string) => void
}

​
Notes

This hook provides methods to control the Swap modal that allows users to swap tokens in their wallet to a target currency. The Swap modal enables users to select tokens from their wallet to swap to a specified target token, with the option to execute additional transactions after the swap completes.