The power of smart swaps is intelligently detecting the currencies available to the user as well as batching multiple transactions together to if the user is utilizing a Sequence wallet to simplify the UX. You can say goodbye to separate approve
and transfer
transactions!
If you intend to use smart swaps with your custom token, please ensure you provide sufficient liquidity for your token (preferably USDC, USDT, or ETH) on a supported DEX such as Uniswap.
Smart Swaps are only supported on mainnets, such as:
- Ethereum
- Arbitrum
- Avalanche
- Base
- Blast
- BSC
- Optimism
- Polygon
- …
Here are some of our supported liquidity pool providers:
UniSwap
SushiSwap
Pancake Swap
Curve
Balancer
Bancor
Synapse
Solidly
Installation and Setup
To integrate the Swap feature with Web SDK, follow these steps:
Install the @0xsequence/checkout library
npm install @0xsequence/checkout
# or
pnpm install @0xsequence/checkout
# or
yarn add @0xsequence/checkout
Place the `SequenceCheckoutProvider` below the `SequenceConnect` Provider in your App:
import { SequenceCheckoutProvider } from '@0xsequence/checkout'
import { SequenceConnect } from '@0xsequence/connect'
import { config } from './config'
const App = () => {
return (
<SequenceConnect config={config}>
<SequenceCheckoutProvider>
<Page />
</SequenceCheckoutProvider>
</SequenceConnect>
)
}
Import Swap Dependencies and Logic
toTokenAddress
: The target currency address, this is the token the user will receive after the swap.
toTokenAmount
: The target currency amount, this is the amount the user will receive after the swap.
postSwapTransactions
: An optional array of transactions to be executed after the swap, using the swapped tokens.
title
: The modal’s title.
description
: A description of the swap and payment process.
chainId
: The chain id of the target currency.
onSuccess
: A callback function that is called when the swap is successful.
import { useSwapModal, type SwapModalSettings } from '@0xsequence/checkout'
const MyComponent = () => {
const { openSwapModal } = useSwapModal()
const onClick = () => {
const chainId = 137
const toTokenAddress = '0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359'
const toTokenAmount = '20000'
const contractAbiInterface = new ethers.Interface(['function demo()']) // Optionally, replace with your contract's abi interface
const data = contractAbiInterface.encodeFunctionData('demo', []) as `0x${string}` // Optionally, replace 'demo' with the function you want to call,
const swapModalSettings: SwapModalSettings = {
onSuccess: () => {
console.log('swap successful!')
},
chainId,
toTokenAddress,
toTokenAmount,
postSwapTransactions: [ // Optionally, replace with the transaction you would like to execute after the swap has taken place.
{
to: '0x37470dac8a0255141745906c972e414b1409b470',
data
}
],
title: 'Swap and Pay',
description: 'Select a token in your wallet to swap to 0.2 USDC.'
}
openSwapModal(swapModalSettings)
}
return <button onClick={onClick}>Swap and Pay</button>
}
Congratulations! You’ve just learned how to use smart swaps with Web SDK.