coldstar-signer

Secure signing core for the Coldstar air-gapped cold wallet.

Provides AES-256-GCM encryption, Argon2id key derivation, Ed25519 and secp256k1 signing, with mlock'd memory for key material protection.

Features

• Ed25519 signing (Solana transactions)
• secp256k1 / ECDSA signing (EVM / Base transactions)
• AES-256-GCM authenticated encryption for key storage
• Argon2id key derivation from passphrases
• Zeroizing memory wrappers and mlock support
• Base58 and hex encoding utilities

Usage

use coldstar_signer::Signer;

License

MIT — part of the Coldstar workspace.