improve ws protocol struct naming and documentation

crates/ws_protocol/src/outgoing/scrape.rs

@@ -0,0 +1,19 @@
+use hashbrown::HashMap;
+use serde::{Deserialize, Serialize};
+
+use crate::common::*;
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct ScrapeResponse {
+    pub action: ScrapeAction,
+    pub files: HashMap<InfoHash, ScrapeStatistics>,
+    // It looks like `flags` field is ignored in reference client
+    // pub flags: HashMap<String, usize>,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct ScrapeStatistics {
+    pub complete: usize,
+    pub incomplete: usize,
+    pub downloaded: usize,
+}