# 3. Register 1. **Get Invitation Code** * Please contact Fiamma personnel to obtain your exclusive invitation code `invite_code`. *** 2. **Get Main Account Public Key** * The main address's public key is required for registration: ``` cd operator_for_linux ./bcli operator -n mainnet derive-key -s ``` Use `public_key` to complete the registration process below. *** 3. **Register as an Operator** Execute the following command in the terminal to register as an operator: ``` ./bcli operator -n mainnet register --invitation-code --main-address --pegin-address --pegout-address --public-key --evm-address ```