IBC message

IBC messages are defined in ibc-rs. The message should be encoded with Protobuf (NOT with Borsh) as the following code to set it as a transaction data.

fn main() {
use ibc::tx_msg::Msg;

pub fn make_ibc_data(message: impl Msg) -> Vec<u8> {
    let msg = message.to_any();
    let mut tx_data = vec![];
    prost::Message::encode(&msg, &mut tx_data).expect("encoding IBC message shouldn't fail");
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