> ## Documentation Index
> Fetch the complete documentation index at: https://docs.socket.tech/llms.txt
> Use this file to discover all available pages before exploring further.

# Swap across EVM & Tron

> Bridge and swap assets between EVM chains and Tron using Socket

Socket supports swapping assets from any EVM chain to Tron and from Tron to any EVM chain.

This guide walks you through swapping assets between EVM chains and Tron using Socket. It covers transaction options and current limitations.

## Quick Start

### Key differences

Here's what's different when integrating Tron compared to standard EVM chains:

**Transaction Flow**

* User sends funds to a Deposit contract with the quote ID
* Socket indexes the transaction and delivers the funds on the destination chain

**API Behavior**

* Both `userAddress` and `receiverAddress` required for quotes
* The only asset supported from/to Tron is [Tron USDT](https://tronscan.io/#/token20/TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t)
* There is no Fee collection at the moment

## Integration Steps

1. **Select Chains:** Users choose the source and destination chains, which determine the tokens available for bridging.
2. **Fetch Routes:** Retrieve the deposit route if available using the `/quote` endpoint.
3. **Submit via Deposit contract:** Obtain the transaction data from the `/quote` endpoint. Use this data to execute the deposit transaction on the source chain.
4. **Track Transaction Status:** Monitor the transaction's progress by polling the `/status` endpoint until the bridging process is complete.

<Info>
  For Tron quotes, please ensure both `userAddress` and `receiverAddress` are defined.

  This is a separate route from `autoRoute` since it is under `depositRoute`.
</Info>

## Examples

### Queries

<Accordion title="Quote from Polygon USDC to Tron USDT">
  ```
  https://public-backend.bungee.exchange/api/v1/bungee/quote?userAddress=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045&receiverAddress=TMe1CS54poswoTTrPAtqsKhry4RM7nvSF4&originChainId=137&destinationChainId=728126428&inputToken=0x3c499c542cef5e3811e1192ce70d8cc03d5c3359&outputToken=TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t&inputAmount=5000000
  ```
</Accordion>

<Accordion title="Quote from Tron USDT to Base USDC">
  ```
  https://public-backend.bungee.exchange/api/v1/bungee/quote?userAddress=TMe1CS54poswoTTrPAtqsKhry4RM7nvSF4&receiverAddress=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045&originChainId=728126428&destinationChainId=8453&inputToken=TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t&outputToken=0x833589fcd6edb6e08f4c7c32d4f71b54bda02913&inputAmount=9681288
  ```
</Accordion>

### Scripts

<Accordion title="Quote and swap from Tron USDT to Polygon USDC (tronweb)">
  ```tsx theme={null}
  import { privateKeyToAccount } from "viem/accounts";
  import { TronWeb } from "tronweb";

  if (!process.env.PRIVATE_KEY) {
    console.error("Error: PRIVATE_KEY environment variable is not set");
    process.exit(1);
  }

  if (!process.env.TRON_PRIVATE_KEY) {
    console.error("Error: TRON_PRIVATE_KEY environment variable is not set");
    process.exit(1);
  }

  const account = privateKeyToAccount(`${process.env.PRIVATE_KEY}`);

  const tronPrivateKey = process.env.TRON_PRIVATE_KEY.replace(/^0x/, "");
  const tronWeb = new TronWeb({
    fullHost: "https://api.trongrid.io",
    privateKey: tronPrivateKey,
  });
  const tronAddress = tronWeb.address.fromPrivateKey(tronPrivateKey);

  const BUNGEE_API_BASE_URL = "https://public-backend.bungee.exchange";
  const USDT_CONTRACT = "TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t";

  async function getUSDTBalance() {
    const contract = await tronWeb.contract().at(USDT_CONTRACT);
    const balance = await contract.balanceOf(tronAddress).call();
    return balance.toString();
  }

  async function getQuote(params) {
    const url = `${BUNGEE_API_BASE_URL}/api/v1/bungee/quote`;
    const fullUrl = `${url}?${new URLSearchParams(params)}`;
    const response = await fetch(fullUrl);
    const data = await response.json();
    const serverReqId = response.headers.get("server-req-id");

    if (!data.success) {
      throw new Error(`Quote error: ${data.statusCode}: ${data.message}. server-req-id: ${serverReqId}`);
    }
    if (!data.result.depositRoute) {
      throw new Error(`No depositRoute available. server-req-id: ${serverReqId}`);
    }

    return {
      quoteId: data.result.depositRoute.quoteId,
      txData: data.result.depositRoute.txData,
      fullResponse: data,
    };
  }

  async function main() {
    const usdtBalance = await getUSDTBalance();
    console.log("USDT Balance:", usdtBalance);

    const quoteResponse = await getQuote({
      userAddress: tronAddress,
      receiverAddress: account.address,
      originChainId: 728126428,
      destinationChainId: 137,
      inputToken: USDT_CONTRACT,
      outputToken: "0x3c499c542cef5e3811e1192ce70d8cc03d5c3359",
      inputAmount: usdtBalance,
    });

    // Submit via tronweb and poll /status with quoteResponse.quoteId
    console.log("Quote ID:", quoteResponse.quoteId);
  }

  main();
  ```
</Accordion>