Get a quote by fiat amount - 法币询价接口（包含fee）
If you integrated with SaaS 2.0, the fee_format should be 2.0;
If you integrated with SaaS 3.0, the fee_format should be 3.0. It will include network_fee, processing_fee, size in the API response, and the price, quantity will be different too.
if the fee_format is 3.1 the quote price calculate includes network_fee and processing_fee.
Please check API details at https://ex.legendtrading.com/reference/app-rfqbyfiat