Function cons_zkapp_command_commitment

pub fn cons_zkapp_command_commitment(
    index: Index,
    e: ZkAppCommandElt,
    receipt_hash: &ReceiptChainHash,
) -> ReceiptChainHash

prepend account_update index computed by Zkapp_command_logic.apply

https://github.com/MinaProtocol/mina/blob/3753a8593cc1577bcf4da16620daf9946d88e8e5/src/lib/mina_base/receipt.ml#L66