# Usage Usage help description is based on https://clap.rs/[clap]. Use `-h | --help` for help menu: ``` $ emerald --help emerald Command-line interface for Emerald platform USAGE: emerald [FLAGS] [OPTIONS] [SUBCOMMAND] FLAGS: -h, --help Prints help information -v Sets the level of verbosity -V, --version Display version OPTIONS: -p, --base-path Set path for chain storage -c, --chain Sets a chain name [default: mainnet] SUBCOMMANDS: account Account related commands balance Request account's balance from ethereum node through RPC help Prints this message or the help of the given subcommand(s) mnemonic Create mnemonic phrase according to BIP39 spec server Start local RPC server transaction Transaction related commands ``` Use `-h | --help` for subcommand help menu: ``` $ emerald account --help emerald-account Account related commands USAGE: emerald account [SUBCOMMAND] FLAGS: -h, --help Prints help information -V, --version Prints version information SUBCOMMANDS: export Export keyfile(s) from keystore help Prints this message or the help of the given subcommand(s) hide Hide selected account from being listed import Import keyfile(s) into storage list List account from `Keyfile` storage new Create new account strip Extract private key from a keyfile unhide Unhide selected account from being listed update Update `name` and `description` for selected account ``` ## Environment variables Environment variables allow you to redefine the default settings: * `EMERALD_HOST` - RPC server listen host * `EMERALD_PORT` - RPC server listen port * `EMERALD_CHAIN` - chain name (`mainnet` | `morden`), has a higher priority relative to `EMERALD_CHAIN_ID` * `EMERALD_CHAIN_ID` - chain id number, has a lower priority relative to `EMERALD_CHAIN` * `EMERALD_GAS` - maximum gas limit to use by transaction * `EMERALD_GAS_PRICE` - gas cost to use by transaction (in Gwei) * `EMERALD_SECURITY_LEVEL` - security level (`normal` | `high` | `ultra`) * `EMERALD_NODE` - url to upstream node. Used for sign and send of transactions ## Output details level Use `-v` flag to manipulate verbosity # emerld -v Will set verbose level to 1 - only info messages. # emerald -vv Will set verbose level to 2 - info and debug messages.