chore: silence wasm warnings (#1404)

Cargo.lock

@@ -1342,6 +1342,7 @@ dependencies = [
  "futures-core",
  "futures-timer",
  "futures-util",
+ "getrandom 0.2.7",
  "hashers",
  "hex",
  "http",

ethers-providers/Cargo.toml

@@ -47,6 +47,7 @@ hashers = "1.0.1"
 tokio = { version = "1.18", features = ["time"] }
 tokio-tungstenite = { version = "0.17.1", default-features = false, features = ["connect"], optional = true }
 
+
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 ws_stream_wasm = "0.7"
 wasm-bindgen = "0.2"
@@ -55,6 +56,8 @@ web-sys = { version  = "0.3", features = ["console"] }
 wasm-timer = "0.2"
 # this is currently necessary for `wasm-timer::Delay` to work
 parking_lot = { version = "0.11", features = ["wasm-bindgen"] }
+# NOTE: this enables wasm compatibility for getrandom indirectly
+getrandom = { version = "0.2", features = ["js"] }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
 tokio = { version = "1.18", default-features = false, features = ["rt", "macros", "time"] }

ethers-providers/src/pending_escalator.rs

@@ -175,6 +175,7 @@ where
 {
     type Output = Result<TransactionReceipt, ProviderError>;
 
+    #[cfg_attr(target_arch = "wasm32", allow(unused_must_use))]
     fn poll(
         self: std::pin::Pin<&mut Self>,
         cx: &mut std::task::Context<'_>,

ethers-providers/src/pending_transaction.rs

@@ -167,6 +167,7 @@ macro_rules! rewake_with_new_state_if {
 impl<'a, P: JsonRpcClient> Future for PendingTransaction<'a, P> {
     type Output = Result<Option<TransactionReceipt>, ProviderError>;
 
+    #[cfg_attr(target_arch = "wasm32", allow(unused_must_use))]
     fn poll(self: Pin<&mut Self>, ctx: &mut Context) -> Poll<Self::Output> {
         let this = self.project();