refactor(bincode): file_id config

src/accountsdb/accounts_file.zig

@@ -19,6 +19,11 @@ pub const FileId = enum(Int) {
 
     pub const Int = u32;
 
+    pub const BincodeConfig = .{
+        .serializer = serialize,
+        .deserializer = deserialize,
+    };
+
     pub inline fn fromInt(int: u32) FileId {
         return @enumFromInt(int);
     }
@@ -49,6 +54,24 @@ pub const FileId = enum(Int) {
             std.options.fmt_max_depth,
         );
     }
+
+    fn serialize(
+        writer: anytype,
+        data: anytype,
+        params: sig.bincode.Params,
+    ) anyerror!void {
+        try sig.bincode.write(writer, @as(usize, data.toInt()), params);
+    }
+
+    fn deserialize(
+        _: std.mem.Allocator,
+        reader: anytype,
+        params: sig.bincode.Params,
+    ) anyerror!FileId {
+        const int = try sig.bincode.readInt(u64, reader, params);
+        if (int > std.math.maxInt(FileId.Int)) return error.IdOverflow;
+        return FileId.fromInt(@intCast(int));
+    }
 };
 
 /// an account thats stored in an AccountFile

src/accountsdb/snapshots.zig

@@ -930,20 +930,7 @@ pub const AccountFileInfo = struct {
     /// amount of bytes used
     length: usize,
 
-    pub const @"!bincode-config:id": bincode.FieldConfig(FileId) = .{
-        .serializer = idSerializer,
-        .deserializer = idDeserializer,
-    };
-
-    fn idSerializer(writer: anytype, data: anytype, params: bincode.Params) anyerror!void {
-        try bincode.write(writer, @as(usize, data.toInt()), params);
-    }
-
-    fn idDeserializer(_: std.mem.Allocator, reader: anytype, params: bincode.Params) anyerror!FileId {
-        const int = try bincode.readInt(usize, reader, params);
-        if (int > std.math.maxInt(FileId.Int)) return error.IdOverflow;
-        return FileId.fromInt(@intCast(int));
-    }
+    pub const @"!bincode-config:id" = FileId.BincodeConfig;
 
     /// Analogous to [AppendVecError](https://github.com/anza-xyz/agave/blob/91a4ecfff78423433cc0001362cea8fed860dcb9/accounts-db/src/append_vec.rs#L74)
     pub const ValidateError = error{