cast wallet vanity
Generate a vanity address
$ cast wallet vanity --help
Usage: cast wallet vanity [OPTIONS]
Options:
      --starts-with <PATTERN>
          Prefix regex pattern or hex string
      --ends-with <PATTERN>
          Suffix regex pattern or hex string
      --nonce <NONCE>
          Generate a vanity contract address created by the generated keypair
          with the specified nonce
      --save-path <PATH>
          Path to save the generated vanity contract address to.
          
          If provided, the generated vanity addresses will appended to a JSON
          array in the specified file.
  -h, --help
          Print help (see a summary with '-h')