brk_fetcher

Bitcoin price data fetcher with multi-source fallback.

What It Enables

Fetch OHLC (Open/High/Low/Close) price data from Binance, Kraken, or the public Bitview API. Automatically falls back between sources on failure, with up to 12 hours of retries when every source is unavailable.

Key Features

• Multi-source fallback: Binance → Kraken → Bitview API
• Health tracking: Temporarily disables failing sources
• Two resolution modes: Per-date (daily) or per-block (OHLC aggregated from 1-minute candles)
• HAR file support: Import Binance 1mn data from browser network captures for historical fills
• Permanent block detection: Stops retrying on DNS/TLS failures

Core API

let mut fetcher = Fetcher::import(Some(&hars_path))?;

// Daily price
let ohlc = fetcher.get_date(Date::new(2024, 4, 20))?;

// Block-level price (uses 1mn data when available)
let ohlc = fetcher.get_height(height, block_timestamp, prev_timestamp)?;

Sources

HAR Import

For historical 1-minute data beyond API limits, export network requests from Binance's web interface and place the HAR file in the imports directory.

Built On

• brk_error for error handling
• brk_logger for retry logging
• brk_types for Date, Height, Timestamp, OHLCCents