1. If you’re swapping from an ERC-20 token, you’ll need to check token approval with checkApprove. If approval doesn’t meet your requirements for the swap, you’ll need to request approval.
  2. Get a quote for the swap with getQuote.
  3. Retrieve the swap transaction object with getSwap.
  4. Execute the swap transaction.
Native tokens, such as ETH, are represented as 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee