Get trading fee rates for a specific market on WhiteBIT via the V4 API.
Successful response
Map of currency tickers to fee information. Each key is an asset ticker (e.g., BTC, EUR).
Crypto assets — providers is an empty array; withdraw and deposit are flat objects with fee fields.
Fiat assets — providers lists available payment methods; withdraw and deposit are objects keyed by provider ID, where each value contains provider-specific fee details.
Fee and limit details for a single asset. For crypto assets, withdraw and deposit are flat fee objects. For fiat assets with providers, they are objects keyed by provider ID.