@type t() :: %Stellar.Horizon.Operation.ManageSellOffer{
  amount: String.t(),
  buying_asset_code: String.t(),
  buying_asset_issuer: String.t(),
  buying_asset_type: String.t(),
  offer_id: String.t(),
  price: String.t(),
  price_r: map(),
  selling_asset_code: String.t(),
  selling_asset_issuer: String.t(),
  selling_asset_type: String.t()
}