feat(ExchangeClient): Add market open and close methods

mathdroid commented 3 weeks ago

Description

This PR introduces market_open and market_close methods to the ExchangeClient, aligning the Rust SDK's functionality with the existing Hyperliquid Python SDK.

Key Changes

Added market_open method for placing market buy/sell orders
Added market_close method for closing positions with market orders
Implemented price slippage calculation with respect to asset-specific decimal requirements
Added helper functions for rounding to significant figures and decimal places

Implementation Details

Mirrors the functionality of the Python SDK's market_open and market_close methods
Uses the existing InfoClient to fetch asset metadata and current mid-prices
Simulates market orders using IOC (Immediate-or-Cancel) limit orders
Respects Hyperliquid's tick size and lot size rules for each asset

Usage Example

let market_open_params = MarketOrderParams {
    asset: "ETH",
    is_buy: true,
    sz: 0.01,
    px: None,
    slippage: Some(0.01),
    cloid: None,
    wallet: None,
};

let response = exchange_client.market_open(market_open_params).await?;

Testing

Manually tested against Hyperliquid testnet
Verified behavior matches Python SDK output for equivalent inputs

Related Issues

Closes #44

mathdroid commented 3 weeks ago

Uodated debug format @lmlmt :)

lmlmt commented 3 weeks ago