Usage:  key private (--chain-code | --signing-key)

  Get the signing or chain code part of an extended private key

Available options:
  -h,--help                Show this help text

The private key is read from stdin.To get a signing key pass '--signing-key'.To get a chain code pass '--chain-code'.Bech32 encoding will be used.In order to have the signing key hex encoded pass the result to the stdin of bech32 tool.
