Two Factor Authentication

When performing send money request with coinbase.transactionResource.send(), there is an optional twoFactorAuthToken parameter. To perform this request, you have to send it twice:

• First time with optional twoFactorAuthToken: nil

  let sendParameters = SendTransactionParameters(to: "[email protected]",
                                              amount: "0.01",
                                              currency: "BTC",
                                              description: "Thanks for the coffee!")
              
  // Completion will recive `Result.failure`
  coinbase.transactionResource.send(accountID: <account_id>,
                                    twoFactorAuthToken: nil,
                                    parameters: sendParameters, 
                                    completion: completion)

• Request will fail with an error:

  NetworkError.responseError(errorResponse, _)

  where errorResponse.errors contains an error with id equal to ClientErrorID.twoFactorRequired.

  The user should get the code via a selected channel (e.g. SMS) and then you can prompt the user to input the code.

• Repeat the request with the auth token and same request parameters:

  coinbase.transactionResource.send(accountID: <account_id>,
                                    twoFactorAuthToken: <2fa_token>,
                                    parameters: sendParameters, 
                                    completion: completion)