fn sign_add_validator_args(
chain_id: u64,
key: &PrivateKey,
address: Address,
ingress: SocketAddr,
egress: IpAddr,
fee_recipient: Address,
) -> Signaturefn sign_add_validator_args(
chain_id: u64,
key: &PrivateKey,
address: Address,
ingress: SocketAddr,
egress: IpAddr,
fee_recipient: Address,
) -> Signature