feat(json-crdt): 🎸 improve metadata and header types

Author: streamich

src/json-crdt/log/codec/LogEncoder.ts

@@ -24,7 +24,7 @@ export class LogEncoder {
 
   public serialize(log: Log, params: SerializeParams = {}): types.LogComponents {
     if (params.noView && params.model === 'sidecar') throw new Error('SIDECAR_MODEL_WITHOUT_VIEW');
-    const metadata: types.LogMetadata = [{}, FileModelEncoding.Auto];
+    const metadata: types.LogHeader = [{}, FileModelEncoding.Auto];
     let model: Uint8Array | unknown | null = null;
     const modelFormat = params.model ?? 'sidecar';
     switch (modelFormat) {

src/json-crdt/log/codec/types.ts

@@ -1,14 +1,13 @@
 import type {FileModelEncoding} from './constants';
 
-export type LogMetadata = [
-  // biome-ignore lint: allow brackets
-  map: {},
+export type LogHeader<LogMetadata extends Record<string, unknown> = Record<string, unknown>> = [
+  map: LogMetadata,
   modelFormat: FileModelEncoding,
 ];
 
-export type LogComponents = [
+export type LogComponents<LogMetadata extends Record<string, unknown> = Record<string, unknown>> = [
   view: unknown | null,
-  metadata: LogMetadata,
+  header: LogHeader<LogMetadata>,
   model: Uint8Array | unknown | null,
   history: LogHistory,
 ];