mmflow 0.1.0

Rust SDK for the mmflow market-data API — REST candles + a WebSocket client.
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# mmflow — Rust SDK

A blocking REST client (OHLCV candles) and a WebSocket client for the mmflow
market-data API.

```toml
[dependencies]
mmflow = "0.1"
```

## REST

```rust
let client = mmflow::Client::new("");            // "" → https://mmflow.ai
let candles = client.candles("BTC", "1m", 24)?;
for c in &candles {
    println!("{} {}", c.time, c.close);
}
```

## WebSocket

`auth`, exponential-backoff reconnect, and subscription replay are built in.

```rust
use mmflow::{Socket, SocketOptions};

let mut sock = Socket::new(SocketOptions {
    api_key: Some("YOUR_KEY".into()),
    ..Default::default()
});
sock.subscribe("trades", "BTC");
sock.run(|payload, meta| {
    println!("{} {}", meta.channel, payload);
})?; // blocks; reconnects unless auto_reconnect is false
```

Channels: `trades`, `orderbook`, `candles`, `liquidations`, `funding`,
`openInterest`, `markPrice`, `footprint`.