Function encode_call_data 

pub fn encode_call_data(
    client: &OnlineClient<SubstrateConfig>,
    xt: &DynamicPayload,
) -> Result<String, Error>

Encodes the call data for a given extrinsic into a hexadecimal string.

Arguments

• client - The client used to interact with the chain.
• xt - The extrinsic whose call data will be encoded and returned.