Route

Butter has built in smart router that will aggregate all the major dex's liquidity from source blockchain and target blockchain, to find the optimal swap route.

Get the best route​

async function getBestRoute(
    fromToken: BaseCurrency,
    toToken: BaseCurrency,
    amountIn: string
): Promise<RouteResponse> 

Response​

RouteResponse

export type RouteResponse = {
  data?: string; // json string
  msg: string;
  status: number;
};

Example​

get the best cross-chain route when swapping 1 BNB for MATIC

const router = new ButterSmartRouter();

const bestRoute = await router.getBestRoute(
    BNB_NATIVE,
    NEAR_NATIVE,
    ethers.utils.parseEther('1')
)

console.log('routeStr', bestRoute.data);

The output would be:

{
  "srcChain":[
    {
      "chainId":"56",
      "amountIn":"1",
      "amountOut":"259.366689922754163277",
      "path":[
        {
          "id":"0xc39F0738AD5852646c0C50d8e0D0F2216a9b58C8",
          "tokenIn":{
            "symbol":"BNB",
            "icon":"",
            "address":"0xae13d989daC2f0dEbFf460aC112a837C89BAa7cd"
          },
          "tokenOut":{
            "symbol":"BUSD",
            "icon":"",
            "address":"0x3F1E91BFC874625f4ee6EF6D8668E79291882373"
          }
        }
      ],
      "dexName":"Pancakeswap",
      "tokenIn":{
        "address":"0x0000000000000000000000000000000000000000",
        "decimals":18,
        "symbol":"BNB",
        "icon":""
      },
      "tokenOut":{
        "address":"0x3F1E91BFC874625f4ee6EF6D8668E79291882373",
        "name":"BUSD",
        "decimals":18,
        "symbol":"BUSD",
        "icon":""
      }
    }
  ],
  "mapChain":[
    {
      "chainId":"22776",
      "dexName":"",
      "amountIn":"259.366689922754163277",
      "amountOut":"259.266689922754163277",
      "tokenIn":{
        "address":"0x424D3bcdC96F42aC919F276D7D4f6C94f24e0703",
        "name":"map usdc",
        "decimals":18,
        "symbol":"mUSDC",
        "icon":""
      },
      "tokenOut":{
        "address":"0x424D3bcdC96F42aC919F276D7D4f6C94f24e0703",
        "name":"map usdc",
        "decimals":18,
        "symbol":"mUSDC",
        "icon":""
      },
      "path":[

      ]
    }
  ],
  "targetChain":[
    {
      "chainId":"137",
      "amountIn":"259.266689922754163277",
      "amountOut":"260.99208763031242886",
      "path":[
        {
          "id":"0x60004720A9edeD2795A7429B11Dd8BcCE1A2358e",
          "tokenIn":{
            "name":"PolygonUSD",
            "symbol":"PUSD",
            "icon":"",
            "address":"0x1E01CF4503808Fb30F17806035A87cf5A5217727"
          },
          "tokenOut":{
            "name":"Wrapped MATIC",
            "symbol":"WMATIC",
            "icon":"",
            "address":"0x9c3C9283D3e44854697Cd22D3Faa240Cfb032889"
          }
        }
      ],
      "dexName":"Quickswap",
      "tokenIn":{
        "address":"0x1E01CF4503808Fb30F17806035A87cf5A5217727",
        "name":"PolygonUSD",
        "decimals":6,
        "symbol":"PUSD",
        "icon":""
      },
      "tokenOut":{
        "address":"0x0000000000000000000000000000000000000000",
        "decimals":18,
        "symbol":"MATIC",
        "icon":""
      }
    }
  ]
}

Now you get the best cross-chain swap route! This is used for displaying as well as execute a actual cross-chain swap and calculate swap fees.