protocols/gossipsub: Enable the protobuf feature of prometheus-client

protocols/gossipsub/Cargo.toml

@@ -31,7 +31,8 @@ serde = { version = "1", optional = true, features = ["derive"] }
 wasm-timer = "0.2.5"
 instant = "0.1.11"
 # Metrics dependencies
-prometheus-client = "0.18.0"
+# TODO: Change to v0.19 once the version has been released.
+prometheus-client = { git = "https://github.com/ackintosh/client_rust.git", rev = "5e145bb0cb52ab4ff01c862a6117fb61ee107f17", features = ["protobuf"] }
 
 [dev-dependencies]
 async-std = "1.6.3"

protocols/gossipsub/src/metrics.rs

@@ -23,7 +23,7 @@
 
 use std::collections::HashMap;
 
-use prometheus_client::encoding::text::Encode;
+use prometheus_client::encoding::Encode;
 use prometheus_client::metrics::counter::Counter;
 use prometheus_client::metrics::family::{Family, MetricConstructor};
 use prometheus_client::metrics::gauge::Gauge;

protocols/gossipsub/src/topic.rs

@@ -20,7 +20,7 @@
 
 use crate::rpc_proto;
 use base64::encode;
-use prometheus_client::encoding::text::Encode;
+use prometheus_client::encoding::Encode;
 use prost::Message;
 use sha2::{Digest, Sha256};
 use std::fmt;

protocols/gossipsub/src/types.rs

@@ -22,7 +22,7 @@
 use crate::rpc_proto;
 use crate::TopicHash;
 use libp2p_core::{connection::ConnectionId, PeerId};
-use prometheus_client::encoding::text::Encode;
+use prometheus_client::encoding::Encode;
 use prost::Message;
 use std::fmt;
 use std::fmt::Debug;