feat(protocol): VersionMessage with (de)serialization (#30)

build.zig.zon

@@ -19,8 +19,8 @@
             .hash = "1220f9e1eb744c8dc2750c1e6e1ceb1c2d521bedb161ddead1a6bb772032e576d74a",
         },
         .@"bitcoin-primitives" = .{
-            .url = "git+https://github.com/zig-bitcoin/bitcoin-primitives#17430ab361bb966b7cabb6c835adbe79c72276aa",
-            .hash = "12205840417b3b689acadf210bf1c815de4045381aa744d64e93e332bb49e9714d5f",
+            .url = "git+https://github.com/zig-bitcoin/bitcoin-primitives#4d179bb3027dbc35a99a56938c05008b62e4bf7e",
+            .hash = "1220a65f6105a79c9347449d2553e7abf965b3f61fa883478954d861e824631d5396",
         },
     },
     .paths = .{

src/config/config.zig

@@ -1,5 +1,13 @@
 const std = @import("std");
 
+const dns_seed = [:0]const u8;
+
+const DNS_SEEDS = [3]dns_seed{
+    "seed.bitcoin.sipa.be",
+    "seed.bitcoin.sprovoost.nl",
+    "seed.btc.petertodd.net",
+};
+
 /// Global configuration for the node
 ///
 /// This is loaded from the `bitcoin.conf` file
@@ -20,8 +28,6 @@ pub const Config = struct {
     /// Data directory
     datadir: [:0]const u8,
 
-    seednode: []const u8,
-
     /// Load the configuration from a file
     ///
     /// # Arguments
@@ -46,7 +52,6 @@ pub const Config = struct {
             .p2p_port = 8333,
             .testnet = false,
             .datadir = ".bitcoin",
-            .seednode = "",
         };
 
         var buf: [1024]u8 = undefined;
@@ -69,6 +74,10 @@ pub const Config = struct {
         return config;
     }
 
+    pub inline fn dnsSeeds() [3]dns_seed {
+        return DNS_SEEDS;
+    }
+
     pub fn deinit(self: *Config) void {
         self.allocator.free(self.datadir);
     }

src/core/mempool.zig

@@ -190,7 +190,6 @@ test "Mempool" {
         .p2p_port = 8333,
         .testnet = false,
         .datadir = "/tmp/btczee",
-        .seednode = "",
     };
     var mempool = try Mempool.init(allocator, &config);
     defer mempool.deinit();