Instrument
Binance instrument refers to a trading pair that is available on the Binance exchange. A trading pair represents the exchange rate between two assets, and it is denoted by a ticker symbol that is standardized across the exchange.
For example, the trading pair BTC/USDT represents the exchange rate between Bitcoin and Tether, a stablecoin that is pegged to the US dollar. In this case, BTC is the base asset, and USDT is the quote asset.
In summary, Binance instrument is a term used to describe the trading pairs that are available on the Binance exchange, and it is an essential concept to understand for anyone looking to trade cryptocurrencies on Binance.
useBinanceInstrument
The useBinanceInstrument function is a utility function that retrieves a specific instrument from Binance and returns it as an Observable. It takes an InstrumentSelector object as a parameter, representing the desired instrument, and uses the useBinanceInstruments hook to fetch all available instruments from Binance. The function then searches for the instrument with the provided ID and returns it. If the instrument is not found, the function throws a MissingInstrumentError with the original InstrumentSelector object as an argument.
useInstruments
The useBinanceInstruments function is a utility function that retrieves and processes instrument data from Binance. It returns an Observable that emits an array of Instrument objects. The function combines the results of two observables: useBinanceInstrumentsRequest(), which retrieves instrument data from Binance, and useBinanceCommission(), which retrieves commission data.
The function maps over the received instrument data, extracting relevant information such as the timestamp, base and quote assets, symbol, and commission. It also calculates the scaling factors for the assets based on the filters associated with each instrument. These filters include price and lot size restrictions, which determine the decimal places for each asset.
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