usync: add lid protocol

src/WAUSync/Protocols/UsyncLIDProtocol.ts

@@ -0,0 +1,25 @@
+import { USyncQueryProtocol } from '../../Types/USync'
+import { BinaryNode } from '../../WABinary'
+
+export class USyncLIDProtocol implements USyncQueryProtocol {
+	name = 'lid'
+
+	getQueryElement(): BinaryNode {
+		return {
+			tag: 'lid',
+			attrs: {},
+		}
+	}
+
+	getUserElement(): null {
+		return null
+	}
+
+	parser(node: BinaryNode): string | null {
+		if(node.tag === 'lid') {
+			return node.attrs.val
+		}
+
+		return null
+	}
+}