Emerald offline wallet command line interface.

Usage:
  emerald server [options] [--port <port>] [--host <host>]
  emerald -V | --version
  emerald -h | --help

Options:
  -h, --help                                Show this message
  -V, --version                             Show current version
  -q, --quiet                               No output printed to stdout
      --host <host>                         Listen host [default: 127.0.0.1]
      --port <port>                         Listen port [default: 1920]
      --base-path <path>                    Base directory path, if omitted default os-specific value will be used:
                                              + Mac OS X: ~/Library/Emerald
                                              + Linux: ~/.emerald
                                              + Windows: %USERDIR%\.emerald
      --security-level <normal|high|ultra>  Level of security for cryptographic operations [default: normal]
  -c, --chain <mainnet|testnet>             Chain name [default: mainnet]
      --chain-id <id>                       Chain id number [default: 61]
