Type Definition indy_sys::payments::BuildGetTxnFeesReqCB

type BuildGetTxnFeesReqCB = extern "C" fn(command_handle: Handle, wallet_handle: Handle, submitter_did: CString, cb: Option<extern "C" fn(command_handle_: Handle, err: Error, get_txn_fees_json: CString) -> Error>) -> Error;