Remastered domain mining interface!

src/blockchain/chain.rs

@@ -45,6 +45,7 @@ const SQL_GET_LAST_FULL_BLOCK_FOR_KEY: &str = "SELECT * FROM blocks WHERE `trans
 const SQL_GET_PUBLIC_KEY_BY_ID: &str = "SELECT pub_key FROM transactions WHERE identity = ? ORDER BY id DESC LIMIT 1;";
 const SQL_GET_ID_BY_ID: &str = "SELECT identity FROM transactions WHERE identity = ? ORDER BY id DESC LIMIT 1;";
 const SQL_GET_TRANSACTION_BY_ID: &str = "SELECT * FROM transactions WHERE identity = ? ORDER BY id DESC LIMIT 1;";
+const SQL_GET_TRANSACTIONS_WITH_ZONE: &str = "SELECT data FROM transactions WHERE data LIKE '%difficulty%';";
 
 pub struct Chain {
     origin: Bytes,
@@ -271,6 +272,25 @@ impl Chain {
         true
     }
 
+    pub fn get_zones(&self) -> Vec<ZoneData> {
+        let mut result = Vec::new();
+        match self.db.prepare(SQL_GET_TRANSACTIONS_WITH_ZONE) {
+            Ok(mut statement) => {
+                while statement.next().unwrap() == State::Row {
+                    let data = statement.read::<String>(0).unwrap();
+                    info!("Got zone data {}", &data);
+                    if let Ok(zone_data) = serde_json::from_str(&data) {
+                        result.push(zone_data);
+                    }
+                }
+            }
+            Err(e) => {
+                warn!("Can't get zones from DB {}", e);
+            }
+        }
+        result
+    }
+
     /// Checks if some zone exists in our blockchain
     pub fn is_zone_in_blockchain(&self, zone: &str) -> bool {
         if self.zones.borrow().contains(zone) {

src/blockchain/transaction.rs

@@ -6,6 +6,7 @@ use serde::ser::SerializeStruct;
 use crate::blockchain::hash_utils::*;
 use crate::bytes::Bytes;
 use crate::dns::protocol::DnsRecord;
+use std::fmt::{Display, Formatter};
 
 extern crate serde;
 extern crate serde_json;
@@ -90,8 +91,14 @@ impl DomainData {
     }
 }
 
-#[derive(Clone, Serialize, Deserialize, PartialEq)]
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
 pub struct ZoneData {
     pub name: String,
     pub difficulty: u32
+}
+
+impl Display for ZoneData {
+    fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
+        f.write_str(&format!("{} ({})", self.name, self.difficulty))
+    }
 }