databento-rs

The official Rust client library for Databento. The clients support fast and safe streaming of both real-time and historical market data through similar interfaces.

Installation

To add the crate to an existing project, run the following command: sh cargo add databento

Usage

Live

Real-time and intraday replay is provided through the Live clients. Here is a simple program that fetches the next ES mini futures trade:

```rust use std::error::Error;

use databento::{ dbn::{ datasets, enums::{SType, Schema}, record::TradeMsg, }, live::{Subscription, SymbolMap}, LiveClient, };

[tokio::main]

async fn main() -> Result<(), Box> { let mut client = LiveClient::builder() .keyfromenv()? .dataset(datasets::GLBXMDP3) .build() .await?; client .subscribe( &Subscription::builder() .symbols("ES.FUT") .schema(Schema::Trades) .stypein(SType::Parent) .build(), ) .await .unwrap(); client.start().await?;

let mut symbol_map = SymbolMap::new();
// Get the next trade
loop {
    let rec = client.next_record().await?.unwrap();
    if let Some(trade) = rec.get::<TradeMsg>() {
        let symbol = &symbol_map[trade.hd.instrument_id];
        println!("Received trade for {symbol}: {trade:?}",);
        break;
    }
    symbol_map.on_record(rec)?;
}
Ok(())

} `` To run this program, set theDATABENTOAPIKEY` environment variable with an actual API key.

Historical

Here is a simple program that fetches 10 minutes worth of historical trades for the entire CME Globex market: ```rust use std::error::Error;

use databento::{ dbn::{enums::Schema, record::TradeMsg}, historical::timeseries::GetRangeParams, HistoricalClient, Symbols, }; use time::macros::datetime;

[tokio::main]

async fn main() -> Result<(), Box> { let mut client = HistoricalClient::builder().keyfromenv()?.build()?; let mut decoder = client .timeseries() .getrange( &GetRangeParams::builder() .dataset("GLBX.MDP3") .datetimerange(( datetime!(2022-06-10 14:30 UTC), datetime!(2022-06-10 14:40 UTC), )) .symbols(Symbols::All) .schema(Schema::Trades) .build(), ) .await?; while let Some(trade) = decoder.decoderecord::().await? { println!("{trade:?}"); } Ok(()) } ```

To run this program, set the DATABENTO_API_KEY environment variable with an actual API key.

Documentation

You can find more detailed examples and the full API documentation on the Databento docs site.

License

Distributed under the Apache 2.0 License.