Function epic_wallet_rust_lib::rust_encrypt_slate

#[no_mangle]
pub unsafe extern "C" fn rust_encrypt_slate(
    wallet: *const c_char, 
    to_address: *const c_char, 
    secret_key_index: *const c_char, 
    epicbox_config: *const c_char, 
    slate: *const c_char
) -> *const c_char