Rename histogram() -> histogram_vec()

src/daemon.rs

@@ -187,11 +187,11 @@ impl Daemon {
                 SocketAddr::from_str(addr).unwrap(),
                 base64::encode(&read_cookie(network)?),
             )?),
-            latency: metrics.histogram(
+            latency: metrics.histogram_vec(
                 HistogramOpts::new("daemon_rpc", "Bitcoind RPC latency (in seconds)"),
                 &["method"],
             ),
-            size: metrics.histogram(
+            size: metrics.histogram_vec(
                 HistogramOpts::new("daemon_bytes", "Bitcoind RPC size (in bytes)"),
                 &["method", "dir"],
             ),

src/index.rs

@@ -263,7 +263,7 @@ impl Stats {
                 "index_height",
                 "Last indexed block's height",
             )),
-            duration: metrics.histogram(
+            duration: metrics.histogram_vec(
                 HistogramOpts::new("index_duration", "indexing duration (in seconds)"),
                 &["step"],
             ),

src/mempool.rs

@@ -130,7 +130,7 @@ impl Tracker {
                     "mempool_txs_vsize",
                     "vsize of mempool transactions (in bytes)",
                 )),
-                update: metrics.histogram(
+                update: metrics.histogram_vec(
                     HistogramOpts::new("mempool_update", "Time to update mempool (in seconds)"),
                     &["step"],
                 ),

src/metrics.rs

@@ -33,7 +33,7 @@ impl Metrics {
         g
     }
 
-    pub fn histogram(&self, opts: prometheus::HistogramOpts, labels: &[&str]) -> HistogramVec {
+    pub fn histogram_vec(&self, opts: prometheus::HistogramOpts, labels: &[&str]) -> HistogramVec {
         let h = HistogramVec::new(opts, labels).unwrap();
         self.reg.register(Box::new(h.clone())).unwrap();
         h

src/rpc.rs

@@ -405,7 +405,7 @@ impl RPC {
 
     pub fn start(addr: SocketAddr, query: Arc<Query>, metrics: &Metrics) -> RPC {
         let stats = Arc::new(Stats {
-            latency: metrics.histogram(
+            latency: metrics.histogram_vec(
                 HistogramOpts::new("electrum_rpc", "Electrum RPC latency (seconds)"),
                 &["method"],
             ),