first push

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "hacker-challenge"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+ed25519-dalek = "2.1.1"
+once_cell = "1.19.0"
+prost = "0.13.1"
+tonic = "0.12.1"
+
+[build-dependencies]
+tonic-build = "0.12.1"

build.rs

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+fn main() {
+    tonic_build::configure()
+        .build_server(true)
+        .compile(
+            &["proto/challenge.proto"],
+            &["proto"],
+        )
+        .unwrap_or_else(|e| panic!("Failed to compile protos {:?}", e));
+}

proto/challenge.proto

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+syntax = "proto3";
+package challenge;
+
+import "google/protobuf/timestamp.proto";
+import "google/protobuf/empty.proto";
+
+service KeyDistribution {
+    rpc UpdateKey (UpdateKeyReq) returns (google.protobuf.Empty);
+    rpc UpdateNode (UpdateNodeReq) returns (google.protobuf.Empty);
+    rpc RemoveNode (RemoveNodeReq) returns (google.protobuf.Empty);
+}
+
+message UpdateKeyReq {
+   string keypair = 1;
+   google.protobuf.Timestamp updated_at = 2;
+}
+
+message UpdateNodeReq {
+   string keypair = 1;
+   google.protobuf.Timestamp updated_at = 2;
+   string ip = 3;
+}
+
+message RemoveNodeReq {
+   string ip = 1;
+}

proto/google/protobuf/timestamp.proto

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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+package google.protobuf;
+
+option csharp_namespace = "Google.Protobuf.WellKnownTypes";
+option cc_enable_arenas = true;
+option go_package = "google.golang.org/protobuf/types/known/timestamppb";
+option java_package = "com.google.protobuf";
+option java_outer_classname = "TimestampProto";
+option java_multiple_files = true;
+option objc_class_prefix = "GPB";
+
+// A Timestamp represents a point in time independent of any time zone or local
+// calendar, encoded as a count of seconds and fractions of seconds at
+// nanosecond resolution. The count is relative to an epoch at UTC midnight on
+// January 1, 1970, in the proleptic Gregorian calendar which extends the
+// Gregorian calendar backwards to year one.
+//
+// All minutes are 60 seconds long. Leap seconds are "smeared" so that no leap
+// second table is needed for interpretation, using a [24-hour linear
+// smear](https://developers.google.com/time/smear).
+//
+// The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By
+// restricting to that range, we ensure that we can convert to and from [RFC
+// 3339](https://www.ietf.org/rfc/rfc3339.txt) date strings.
+//
+// # Examples
+//
+// Example 1: Compute Timestamp from POSIX `time()`.
+//
+//     Timestamp timestamp;
+//     timestamp.set_seconds(time(NULL));
+//     timestamp.set_nanos(0);
+//
+// Example 2: Compute Timestamp from POSIX `gettimeofday()`.
+//
+//     struct timeval tv;
+//     gettimeofday(&tv, NULL);
+//
+//     Timestamp timestamp;
+//     timestamp.set_seconds(tv.tv_sec);
+//     timestamp.set_nanos(tv.tv_usec * 1000);
+//
+// Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.
+//
+//     FILETIME ft;
+//     GetSystemTimeAsFileTime(&ft);
+//     UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;
+//
+//     // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
+//     // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.
+//     Timestamp timestamp;
+//     timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));
+//     timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));
+//
+// Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.
+//
+//     long millis = System.currentTimeMillis();
+//
+//     Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)
+//         .setNanos((int) ((millis % 1000) * 1000000)).build();
+//
+//
+// Example 5: Compute Timestamp from Java `Instant.now()`.
+//
+//     Instant now = Instant.now();
+//
+//     Timestamp timestamp =
+//         Timestamp.newBuilder().setSeconds(now.getEpochSecond())
+//             .setNanos(now.getNano()).build();
+//
+//
+// Example 6: Compute Timestamp from current time in Python.
+//
+//     timestamp = Timestamp()
+//     timestamp.GetCurrentTime()
+//
+// # JSON Mapping
+//
+// In JSON format, the Timestamp type is encoded as a string in the
+// [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the
+// format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"
+// where {year} is always expressed using four digits while {month}, {day},
+// {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional
+// seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution),
+// are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone
+// is required. A proto3 JSON serializer should always use UTC (as indicated by
+// "Z") when printing the Timestamp type and a proto3 JSON parser should be
+// able to accept both UTC and other timezones (as indicated by an offset).
+//
+// For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
+// 01:30 UTC on January 15, 2017.
+//
+// In JavaScript, one can convert a Date object to this format using the
+// standard
+// [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString)
+// method. In Python, a standard `datetime.datetime` object can be converted
+// to this format using
+// [`strftime`](https://docs.python.org/2/library/time.html#time.strftime) with
+// the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can use
+// the Joda Time's [`ISODateTimeFormat.dateTime()`](
+// http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime%2D%2D
+// ) to obtain a formatter capable of generating timestamps in this format.
+//
+//
+message Timestamp {
+  // Represents seconds of UTC time since Unix epoch
+  // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
+  // 9999-12-31T23:59:59Z inclusive.
+  int64 seconds = 1;
+
+  // Non-negative fractions of a second at nanosecond resolution. Negative
+  // second values with fractions must still have non-negative nanos values
+  // that count forward in time. Must be from 0 to 999,999,999
+  // inclusive.
+  int32 nanos = 2;
+}

src/database.rs

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+#![allow(dead_code)]
+use std::collections::HashMap;
+use std::sync::Mutex;
+use ed25519_dalek::{VerifyingKey, SigningKey};
+use once_cell::sync::Lazy;
+use std::time::SystemTime;
+
+#[derive(Clone)]
+pub struct NodeInfo {
+    pubkey: VerifyingKey,
+    updated_at:  SystemTime,
+}
+
+static NODES: Lazy<Mutex<HashMap<String, NodeInfo>>> = Lazy::new(|| {
+    Mutex::new(HashMap::new())
+});
+
+static KEYS: Lazy<Mutex<HashMap<VerifyingKey, SigningKey>>> = Lazy::new(|| {
+    Mutex::new(HashMap::new())
+});
+
+pub fn add_key(pubkey: VerifyingKey, privkey: SigningKey) {
+    let mut map = KEYS.lock().unwrap();
+    map.insert(pubkey, privkey);
+}
+
+pub fn remove_key(pubkey: &VerifyingKey) {
+    let mut map = KEYS.lock().unwrap();
+    map.remove(pubkey);
+}
+
+pub fn get_privkey(pubkey: &VerifyingKey) -> Option<SigningKey> {
+    let map = KEYS.lock().unwrap();
+    map.get(pubkey).cloned()
+}
+
+pub fn add_node(ip: String, info: NodeInfo) {
+    let mut map = NODES.lock().unwrap();
+    map.insert(ip, info);
+}
+
+pub fn remove_node(ip: &str) {
+    let mut map = NODES.lock().unwrap();
+    map.remove(ip);
+}
+
+pub fn get_pubkey(ip: &str) -> Option<NodeInfo> {
+    let map = NODES.lock().unwrap();
+    map.get(ip).cloned()
+}
+

src/main.rs

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+mod database;
+fn main() {
+    println!("Hello, world!");
+}