Add a few TODOs

src/bulk.rs

@@ -56,6 +56,7 @@ impl Parser {
     }
 
     fn last_indexed_row(&self) -> Row {
+        // TODO: use JSONRPC for missing blocks, and don't use 'L' row at all.
         let indexed_blockhashes = self.indexed_blockhashes.lock().unwrap();
         let last_header = self
             .current_headers

src/daemon.rs

@@ -313,6 +313,7 @@ impl Daemon {
                 HistogramOpts::new("daemon_rpc", "Bitcoind RPC latency (in seconds)"),
                 &["method"],
             ),
+            // TODO: use better buckets (e.g. 1 byte to 10MB).
             size: metrics.histogram_vec(
                 HistogramOpts::new("daemon_bytes", "Bitcoind RPC size (in bytes)"),
                 &["method", "dir"],