From c2590ce5261d1a03177a10a40021f9207ef60406 Mon Sep 17 00:00:00 2001
From: teor <teor@riseup.net>
Date: Thu, 11 Jun 2020 22:09:51 +1000
Subject: [PATCH] consensus: Make future handling a little nicer

Part of #428.
---
 Cargo.lock                    | 1 +
 zebra-consensus/Cargo.toml    | 1 +
 zebra-consensus/src/verify.rs | 3 ++-
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Cargo.lock b/Cargo.lock
index 9317db50..172abe64 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2127,6 +2127,7 @@ version = "0.1.0"
 dependencies = [
  "color-eyre",
  "eyre",
+ "futures-util",
  "tokio",
  "tower",
  "tracing",
diff --git a/zebra-consensus/Cargo.toml b/zebra-consensus/Cargo.toml
index 6ba3e135..81f0eeec 100644
--- a/zebra-consensus/Cargo.toml
+++ b/zebra-consensus/Cargo.toml
@@ -10,6 +10,7 @@ edition = "2018"
 [dependencies]
 zebra-chain = { path = "../zebra-chain" }
 zebra-state = { path = "../zebra-state" }
+futures-util = "0.3.5"
 tower = "0.3.1"
 
 [dev-dependencies]
diff --git a/zebra-consensus/src/verify.rs b/zebra-consensus/src/verify.rs
index 3de706ed..5232f625 100644
--- a/zebra-consensus/src/verify.rs
+++ b/zebra-consensus/src/verify.rs
@@ -8,6 +8,7 @@
 //! Verification is provided via a `tower::Service`, to support backpressure and batch
 //! verification.
 
+use futures_util::FutureExt;
 use std::{
     error,
     future::Future,
@@ -80,7 +81,7 @@ where
             block: block.into(),
         });
 
-        Box::pin(async move { Ok(header_hash) })
+        async move { Ok(header_hash) }.boxed()
     }
 }