Return Pin<Box<...>> instead of Box from closure

cnd/src/btsieve/ethereum/mod.rs

@@ -12,12 +12,12 @@ use crate::{
 use anyhow;
 use chrono::NaiveDateTime;
 use ethbloom::Input;
-use futures_core::{compat::Future01CompatExt, Future, FutureExt};
+use futureyes_core::{compat::Future01CompatExt, Future};
 use genawaiter::{
     sync::{Co, Gen},
     GeneratorState,
 };
-use std::collections::HashSet;
+use std::{collections::HashSet, pin::Pin};
 
 type Hash = H256;
 type Block = crate::ethereum::Block<Transaction>;
@@ -66,7 +66,7 @@ where
         event.topics.clone(),
         action,
         |transaction| {
-            Box::new({
+            Box::pin({
                 let blockchain_connector = blockchain_connector.clone();
                 let event = event.clone();
                 async move {
@@ -77,7 +77,6 @@ where
 
                     Ok(None)
                 }
-                .boxed()
             })
         },
     )
@@ -188,10 +187,8 @@ where
         + Clone,
     F: Fn(
         Transaction,
-    ) -> Box<
-        dyn Future<Output = anyhow::Result<Option<(Transaction, TransactionReceipt)>>>
-            + Unpin
-            + Send,
+    ) -> Pin<
+        Box<dyn Future<Output = anyhow::Result<Option<(Transaction, TransactionReceipt)>>> + Send>,
     >,
 {
     let mut block_generator = Gen::new({