Add utxo example

Author: Alex6323

bee-inx/examples/utxo.rs

@@ -0,0 +1,31 @@
+// Copyright 2022 IOTA Stiftung
+// SPDX-License-Identifier: Apache-2.0
+
+use bee_inx::{client::Inx, Error, MilestoneRangeRequest};
+use futures::StreamExt;
+
+#[tokio::main]
+async fn main() -> Result<(), Error> {
+    dotenvy::dotenv().ok();
+    let inx_connect_url = std::env::var("INX_CONNECT_URL").unwrap_or_else(|_| "http://localhost:9029".to_string());
+
+    let mut inx = Inx::connect(&inx_connect_url).await?;
+    println!("Connected via INX to node at {inx_connect_url}");
+
+    let mut unspent_outputs = inx.read_unspent_outputs().await?;
+
+    let mut count = 0;
+    while let Some(_) = unspent_outputs.next().await {
+        count += 1;
+    }
+    println!("Read {count} unspent outputs.");
+
+    let mut ledger_update_feed = inx.listen_to_ledger_updates(MilestoneRangeRequest::from(..)).await?;
+
+    while let Some(ledger_update) = ledger_update_feed.next().await {
+        let ledger_update = ledger_update?;
+        println!("{:?}", ledger_update);
+    }
+
+    Ok(())
+}