Function solana_ledger::entry::next_hash

pub fn next_hash(
    start_hash: &Hash, 
    num_hashes: u64, 
    transactions: &[Transaction]
) -> Hash

Creates the hash num_hashes after start_hash. If the transaction contains a signature, the final hash will be a hash of both the previous ID and the signature. If num_hashes is zero and there's no transaction data, start_hash is returned.