rootchain-rs 1.0.2

The primary Rust SDK for the RootChain ecosystem, providing RPC clients, wallet management, and transaction construction.
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# rootchain-rs

[![Crates.io](https://img.shields.io/crates/v/rootchain-rs.svg)](https://crates.io/crates/rootchain-rs)
[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](../../LICENSE)

> **The primary Rust SDK for interacting with the RootChain network.**

`rootchain-rs` provides a high-level async client for building Rust applications that communicate with RootChain nodes: wallets, bots, indexers, relayers, and tooling.

---

## What's Inside

| Module | Description |
| :--- | :--- |
| `client` | JSON-RPC async client for communicating with a RootChain node (`getBalance`, `sendTransaction`, `getBlock`, etc.) |
| `wallet` | `Wallet` type for key management, BIP-39 mnemonic support, AES-256-GCM encrypted storage, and transaction signing |
| `contract` | Typed `Contract` wrapper for encoding/decoding ABI calls to RootChain WASM contracts |
| `error` | Unified `SdkError` type covering RPC, signing, and serialization errors |

---

## Installation

```toml
[dependencies]
rootchain-rs = "1.0.2"
tokio = { version = "1", features = ["full"] }
```

---

## Usage

### Connecting to a Node

```rust
use rootchain_rs::client::RootchainClient;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = RootchainClient::new("http://localhost:8545");

    let balance = client.get_balance("0xabc...").await?;
    println!("Balance: {} µROOT", balance.balance);

    let block = client.get_block(1000).await?;
    println!("Block hash: {}", block.header.merkle_root);

    Ok(())
}
```

### Wallet Management

```rust
use rootchain_rs::wallet::Wallet;

// Create a new wallet from a BIP-39 mnemonic
let wallet = Wallet::from_mnemonic("word1 word2 ... word24")?;
let address = wallet.address();

// Sign and send a transfer
let client = RootchainClient::new("http://localhost:8545");
let tx_hash = wallet.send_transfer(&client, &recipient, 1_000_000u128, 1.0.228).await?;
```

### Contract Interaction

```rust
use rootchain_rs::contract::Contract;

let contract = Contract::at("0xcontract_address...");

// Encode a method call (method ID + bincode payload)
let payload = contract.encode_call(1u32, &my_args)?;

// Submit via wallet
let tx_hash = wallet.call_contract(&client, &contract, payload).await?;
```

---

## High-Precision Balances

All balance fields use `u128` internally to support the full 18-decimal precision of ROOT tokens (1 ROOT = 1,000,000 µROOT). Balances are safely serialized as decimal strings over JSON.

```rust
let balance: u128 = 1_000_000_000_000u128; // 1,000,000 ROOT
```

---

## License

MIT — See [LICENSE](../../LICENSE) for details.