> ## Documentation Index
> Fetch the complete documentation index at: https://sequence-0fb8d9e6-shop-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Obtener opciones de tarifas (Fee Options)

<Warning>
  ¡La selección de tarifas solo es necesaria si aún no está usando las capacidades de patrocinio de gas de Sequence Builder!
  Cree su proyecto en Sequence Builder para facilitar el desarrollo hoy mismo.
</Warning>

<CodeGroup>
  ```typescript Typescript
  import { Session } from '@0xsequence/auth'
  import { ethers } from 'ethers'

  const config = {
    mnemonic: 'YOUR MNEMONIC',
    projectAccessKey: 'YOUR PROJECT ACCESS KEY',
    chainId: ChainId.YOUR_CHAIN_ID // e.g. ChainId.MAINNET, ChainId.POLYGON, etc.
  }

  const signer = ethers.Wallet.fromMnemonic(config.mnemonic)

  const session = await Session.singleSigner({ signer, projectAccessKey: config.projectAccessKey })

  const account = session.account.getSigner(config.chainId, {
    async selectFee(_transactions, options) {
      // This callback is called with the list of candidate fee options.

      console.log('Fee options:', JSON.stringify(options, undefined, 2))

      // Select the USDC fee option.
      return options.find(option => option.token.symbol === 'USDC')
    }
  })
  ```

  ```go Go
  mnemonic := "YOUR MNEMONIC"
  projectAccessKey := "YOUR PROJECT ACCESS KEY"
  rpcURL := fmt.Sprintf("https://nodes.sequence.app/YOUR-NETWORK/%v", projectAccessKey)
  relayerURL := "https://YOUR-NETWORK-relayer.sequence.app"

  signer, _ := ethwallet.NewWalletFromMnemonic(mnemonic)

  wallet, _ := sequence.NewWalletSingleOwner(signer)

  provider, _ := ethrpc.NewProvider(rpcURL)
  wallet.SetProvider(provider)

  relayer, _ := relayer.NewRpcRelayer(relayerURL, projectAccessKey, provider, nil)
  wallet.SetRelayer(relayer)

  transactions := sequence.Transactions{
    &sequence.Transaction{
      To:    common.HexToAddress("0x468E8e29F6cfb0F6b7ff10ec6A1AB516ec849c04"),
      Value: big.NewInt(1000000000000000000),
    },
  }

  options, quote, _ := wallet.FeeOptions(ctx, transactions)
  ```
</CodeGroup>