Validating Transactions​ Shardeum validators perform consensus on transactions. Shardeum validators with honest transaction consensus earn testnet SHM. Shardeum validators with dishonest transaction consensus will have their testnet SHM slashed. Step 1: Install prerequisites​ Open a Shell Terminal​ Access the terminal interface for Shell CLI commands: Linux (Press at the same time) Ctrl + Alt + T Mac (Press at the same time) Command + Space bar (Type) Terminal