ensip25 0.4.4

Rust implementation of ENSIP-25: verify the link between ENS names and ERC-8004 AI agent registries.
Documentation 
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//! ERC-7930 Interoperable Address encoding/decoding example.
//!
//! Run with: `cargo run --example erc7930_encode`
//!
//! Uses official ENSIP-25 test data:
//! - Registry: ERC-8004 `IdentityRegistry` on Ethereum Mainnet
//! - Expected: `0x000100000101148004a169fb4a3325136eb29fa0ceb6d2e539a432`

#[cfg(feature = "provider")]
use alloy as _;
#[cfg(feature = "provider")]
use alloy_ens as _;
use alloy_primitives::address;
use ensip25::erc7930::InteropAddress;
#[cfg(feature = "erc8004")]
use erc8004 as _;
#[cfg(feature = "serde")]
use serde as _;
use thiserror as _;
use tokio as _;

#[expect(clippy::print_stdout, reason = "example demonstrates CLI output")]
fn main() -> Result<(), Box<dyn std::error::Error>> {
    // ERC-8004 IdentityRegistry on Ethereum mainnet (chain_id = 1)
    let registry = address!("8004A169FB4a3325136EB29fA0ceB6D2e539a432");
    let addr = InteropAddress::evm(1, registry);

    // Encode to hex string
    let hex = addr.to_hex()?;
    println!("ERC-7930 Encoded Registry: {hex}");

    // Verify against official ENSIP-25 example
    if hex != "0x000100000101148004a169fb4a3325136eb29fa0ceb6d2e539a432" {
        return Err("encoded hex does not match official ENSIP-25 example".into());
    }
    println!("✓ Matches official ENSIP-25 example");

    // Decode from hex
    let decoded = InteropAddress::from_hex(&hex)?;
    if addr != decoded {
        return Err("roundtrip decode did not produce identical address".into());
    }
    println!("✓ Roundtrip encode/decode successful");

    // Access individual fields
    println!("\nParsed fields:");
    println!("  Version: {:#06x}", addr.version());
    println!("  Chain type: {} (EVM)", addr.chain_type());
    println!(
        "  Chain ref: 0x{} (chain_id = 1)",
        alloy_primitives::hex::encode(addr.chain_ref())
    );
    println!(
        "  Address: 0x{}",
        alloy_primitives::hex::encode(addr.address_bytes())
    );

    Ok(())
}