Technical whitepaper and documentation for Coldstar — an open-source, command-line cold wallet management tool for the Solana blockchain that prioritizes security through air-gapped transaction signing.
Coldstar is an open-source, command-line cold wallet management tool for the Solana blockchain that prioritizes security through air-gapped transaction signing. This whitepaper describes the implementation — a Python-based CLI application that enables users to create bootable USB cold wallets, generate Ed25519 keypairs offline, and sign transactions without network exposure.
By leveraging Alpine Linux as a minimal operating system and industry-standard cryptographic libraries, Coldstar provides enterprise-grade security with full code transparency and reproducibility.
Key Features
Complete air-gap isolation during private key generation and transaction signing
Minimal Alpine Linux (~50MB) bootable USB creation
Python-based terminal interface with rich UI components
Ed25519 cryptographic operations using audited libraries
Offline transaction signing with online broadcasting separation
Rust secure signer module for hardware-level key protection
