siwx — Sign-In with X (CAIP-122)

Chain-agnostic core library implementing the CAIP-122 Sign-In with X abstract data model. This crate provides message construction, parsing, validation, and a [Verifier] trait for chain-specific signature verification.

Chain-specific implementations live in companion crates:

• siwx-evm — Ethereum (EIP-191 / EIP-1271)
• siwx-svm — Solana (Ed25519)

Examples

use siwx::{SiwxMessage, ValidateOpts};

let msg = SiwxMessage::new(
    "example.com",
    "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
    "https://example.com/login",
    "1",
    "1",
)?
.with_statement("I accept the Terms of Service")
.with_nonce(siwx::nonce::generate_default());

msg.validate(&ValidateOpts::default())?;

let signing_text = msg.to_sign_string("Ethereum");
assert!(signing_text.contains("Ethereum"));
# Ok::<(), siwx::SiwxError>(())