Crosschain SWAP

How to SWAP from one chain to another chain

1. Connect to the network

import { Demos, DemosWebAuth } from "@kynesyslabs/demosdk/websdk"
import RubicService from "@/features/bridges/rubic"
import { WrappedCrossChainTrade } from "rubic-sdk"
import { BridgeTradePayload, SupportedChains } from "@kynesyslabs/demosdk/types"

// Connect to the network
const rpc = "https://demosnode.discus.sh";
const demos = new Demos();
await demos.connect(rpc);

// Create and connect your wallet
const identity = DemosWebAuth.getInstance();
await identity.create();
await demos.connectWallet(identity.keypair.privateKey as Uint8Array);

2. Creating the RubicService instance

After connecting the wallet you need to create a Rubic Service instance

const rubicService = new RubicService(demos.getAddress(), SupportedChains.POLYGON);

As you can see here used SupportedChains.POLYGON. Need to use that chain from which you want to swap tokens. In this case used Polygon, because we wanted to swap from the Polygon chain to Ethereum.

Here are the supported chains.

export const SupportedChains = {
    ETH: "ETH",
    POLYGON: "POLYGON",
    BSC: "BSC",
    AVALANCHE: "AVALANCHE",
    OPTIMISM: "OPTIMISM",
    ARBITRUM: "ARBITRUM",
    LINEA: "LINEA",
    BASE: "BASE",
    SOLANA: "SOLANA",
}

3. Creating the payload to get trade data

Provided payload for swapping 10 USDT from the Polygon chain to the Ethereum chain

const payload: BridgeTradePayload = {
                fromToken: "USDT",
                toToken: "USDT",
                amount: 10,
                fromChainId: 137,
                toChainId: 1,
            }

4. Get trade data

After creating the payload, need to call the getTrade method

const trade = await rubicService.getTrade(payload);

5. Execute trade method

After successfully getting the trade data, we already can do a swap by calling the executeTrade method

const receipt = await rubicService.executeTrade(trade);

The result of the executeTrade method will be the receipt of that swap transaction

e.g.

"0x2342692074a7484f3ac9713d36cd23fdc1c51810d03639e5cf651bfefb62fdc3"

PolygonScan