t() :: %Tai.Exchanges.Product{
  exchange_id: atom(),
  exchange_symbol: String.t(),
  max_price: Decimal.t() | nil,
  max_size: Decimal.t() | nil,
  min_notional: Decimal.t(),
  min_price: Decimal.t(),
  min_size: Decimal.t(),
  price_increment: Decimal.t() | nil,
  size_increment: Decimal.t(),
  status: atom(),
  symbol: atom()
}