Function require_ticker_class 

pub fn require_ticker_class(id: &InstrumentId) -> Result<InstrumentKey, Error>

Returns the BCS instrument key (ticker and class code) of an instrument id.

BCS names an instrument by ticker plus trading board (class code), for example SBER on TQBR.

Errors

[brokapi_core::Error::Config] when the native id of id is not [NativeId::TickerClass]. An id that came from another broker cannot be used here.

Examples

use brokapi_bcs::util::require_ticker_class;
use brokapi_core::{InstrumentId, InstrumentKey, NativeId};

let sber = InstrumentId::new(
    InstrumentKey::new("SBER", "TQBR"),
    NativeId::TickerClass { ticker: "SBER".into(), class_code: "TQBR".into() },
);
assert_eq!(require_ticker_class(&sber).unwrap().class_code, "TQBR");

let foreign = InstrumentId::new(InstrumentKey::new("SBER", "MISX"), NativeId::Uid("uid".into()));
assert!(require_ticker_class(&foreign).is_err());