fix const param

src/network/protocol/messages/getblocks.zig

@@ -26,7 +26,7 @@ pub const GetblocksMessage = struct {
  /// Returns the message checksum
  ///
  /// Computed as `Sha256(Sha256(self.serialize()))[0..4]`
- pub fn checksum(self: GetblocksMessage) [4]u8 {
+ pub fn checksum(self: *const GetblocksMessage) [4]u8 {
  var digest: [32]u8 = undefined;
  var hasher = Sha256.init(.{});
  const writer = hasher.writer();
@@ -40,9 +40,7 @@ pub const GetblocksMessage = struct {
 
  /// Free the `header_hashes`
  pub fn deinit(self: GetblocksMessage, allocator: std.mem.Allocator) void {
- if (self.header_hashes.len > 0) {
- allocator.free(self.header_hashes);
- }
+ allocator.free(self.header_hashes);
  }
 
  /// Serialize the message as bytes and write them to the Writer.

src/network/wire/lib.zig

@@ -57,7 +57,7 @@ pub fn sendMessage(allocator: std.mem.Allocator, w: anytype, protocol_version: i
  const payload_len: u32 = @intCast(payload.len);
 
  // Calculate total message size
- const precomputed_total_size = 18; // network (4 bytes) + command (12 bytes) + payload size (4 bytes) + checksum (4 bytes)
+ const precomputed_total_size = 24; // network (4 bytes) + command (12 bytes) + payload size (4 bytes) + checksum (4 bytes)
  const total_message_size = precomputed_total_size + payload_len;
 
  if (total_message_size > MAX_SIZE) {