Function commit_finalize_from_buffer 

pub fn commit_finalize_from_buffer(
    validator: Pubkey,
    delegated_account: Pubkey,
    data_buffer: Pubkey,
    commit_args: &mut CommitFinalizeArgs,
) -> (Instruction, CommitPDAs)

Builds a commit state from buffer instruction. See [dlp::processor::process_commit_diff_from_buffer] for docs.