Function rct_output_to_output_on_chain 

pub fn rct_output_to_output_on_chain(
    rct_output: &RctOutput,
    get_txid: bool,
    tapes: &TapesReadTransaction<'_>,
    db: &BlockchainDatabase,
) -> DbResult<OutputOnChain>

Map a RctOutput to a [cuprate_types::OutputOnChain].