refactor(async)!: use tokio::time instead of async-std::task

Author: oleonardolima

Cargo.toml

@@ -20,25 +20,25 @@ path = "src/lib.rs"
 serde = { version = "1.0", features = ["derive"] }
 bitcoin = { version = "0.32", features = ["serde", "std"], default-features = false }
 hex = { version = "0.2", package = "hex-conservative" }
-log = "^0.4"
+log = { version = "^0.4" }
 minreq = { version = "2.11.0", features = ["json-using-serde"], optional = true }
 reqwest = { version = "0.11",  features = ["json"], default-features = false, optional = true }
-async-std = { version = "1.13.0", optional = true }
+tokio = { version = "1.38.1", features = ["time"], default-features = false, optional = true }
 
 [dev-dependencies]
 serde_json = "1.0"
-tokio = { version = "1.20.1", features = ["full"] }
+tokio = { version = "1.38.1", features = ["full"] }
 electrsd = { version = "0.28.0", features = ["legacy", "esplora_a33e97e1", "bitcoind_25_0"] }
 lazy_static = "1.4.0"
 
 [features]
-default = ["blocking", "async", "async-https"]
+default = ["blocking", "async", "async-https", "tokio"]
 blocking = ["minreq", "minreq/proxy"]
 blocking-https = ["blocking", "minreq/https"]
 blocking-https-rustls = ["blocking", "minreq/https-rustls"]
 blocking-https-native = ["blocking", "minreq/https-native"]
 blocking-https-bundled = ["blocking", "minreq/https-bundled"]
-async = ["async-std", "reqwest", "reqwest/socks"]
+async = ["reqwest", "reqwest/socks", "tokio?/time"]
 async-https = ["async", "reqwest/default-tls"]
 async-https-native = ["async", "reqwest/native-tls"]
 async-https-rustls = ["async", "reqwest/rustls-tls"]

src/async.rs

@@ -11,7 +11,6 @@
 
 //! Esplora by way of `reqwest` HTTP client.
 
-use async_std::task;
 use std::collections::HashMap;
 use std::str::FromStr;
 
@@ -434,7 +433,8 @@ impl AsyncClient {
         loop {
             match self.client.get(url).send().await? {
                 resp if attempts < self.max_retries && is_status_retryable(resp.status()) => {
-                    task::sleep(delay).await;
+                    tokio::time::sleep(delay).await;
+                    // FIXME: use an sleeper_fn passed as parameter.
                     attempts += 1;
                     delay *= 2;
                 }