fix(waproto): normalize high to int32 + tighten roundtrip test

Addresses 2 review comments on PR #385:

1. CodeRabbit Major — longToString/longToNumber checked
   `value.high < 0` on the raw input. When a Long-like object carries
   high as an unsigned 32-bit value (e.g. raw {low, high} from JSON
   deserialization, not constructed via Long.fromBits/fromValue which
   normalize via `| 0`), the sign-bit detection fails and the value is
   interpreted as unsigned. Example: {low: 0, high: 0xFFFFFFFF} signed
   should be -4294967296 but returned 18446744069414584320.

   Fix: `const high = value.high | 0` before the sign check. Applied
   to both helpers in WAProto/index.js (generated artifact) and
   WAProto/fix-imports.js (template). Diverges from upstream Baileys
   PR #2333 which has the same latent bug.

   Added 2 test cases in bigint-validation.test.ts for the raw
   {low, high} scenario (Long.fromBits would mask the bug because it
   normalizes internally).

2. CodeRabbit Nitpick — the encode/decode roundtrip test in
   proto-tojson-long.test.ts used safe integers (1700000000 and
   123456789), which would silently pass even if longToString fell
   back to Number(value). Switched to uint64 values above
   MAX_SAFE_INTEGER (max uint64 and 9999999999999999999) so the
   roundtrip actually exercises the BigInt fast path.

Test suite: 789/789 passing (+2 cases for the unsigned-high scenario).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

WAProto/fix-imports.js

@@ -18,14 +18,21 @@ try {
     '\tif (typeof value === "number") {\n' +
     '\t\treturn String(value);\n' +
     '\t}\n' +
-    '\tif (!$util.Long) {\n' +
+    '\t// Fast path: convert Long {low, high} directly via native BigInt\n' +
-    '\t\treturn String(value);\n' +
+    '\t// BigInt.toString() is a native C++ operation, much faster than Long\'s pure JS division loops\n' +
+    '\tif (value && typeof value.low === "number" && typeof value.high === "number") {\n' +
+    '\t\t// Normalize high to signed int32 so the sign-bit check works for inputs\n' +
+    '\t\t// where high is stored unsigned (e.g. raw {low, high} JSON).\n' +
+    '\t\tconst high = value.high | 0;\n' +
+    '\t\tconst lo = BigInt(value.low >>> 0);\n' +
+    '\t\tconst hi = BigInt(value.high >>> 0);\n' +
+    '\t\tconst combined = (hi << 32n) | lo;\n' +
+    '\t\tif (!unsigned && high < 0) {\n' +
+    '\t\t\treturn (combined - (1n << 64n)).toString();\n' +
+    '\t\t}\n' +
+    '\t\treturn combined.toString();\n' +
     '\t}\n' +
-    '\tconst normalized = $util.Long.fromValue(value);\n' +
+    '\treturn String(value);\n' +
-    '\tconst prepared = unsigned && normalized && typeof normalized.toUnsigned === "function"\n' +
-    '\t\t? normalized.toUnsigned()\n' +
-    '\t\t: normalized;\n' +
-    '\treturn prepared.toString();\n' +
     '}\n\n'
   const longToNumberHelper =
     'function longToNumber(value, unsigned) {\n' +
@@ -33,19 +40,20 @@ try {
     '\t\treturn value;\n' +
     '\t}\n' +
     '\tif (typeof value === "string") {\n' +
-    '\t\tconst numeric = Number(value);\n' +
-    '\t\treturn numeric;\n' +
-    '\t}\n' +
-    '\tif (!$util.Long) {\n' +
     '\t\treturn Number(value);\n' +
     '\t}\n' +
-    '\tconst normalized = $util.Long.fromValue(value);\n' +
+    '\t// Fast path: convert Long {low, high} directly via native BigInt\n' +
-    '\tconst prepared = unsigned && normalized && typeof normalized.toUnsigned === "function"\n' +
+    '\tif (value && typeof value.low === "number" && typeof value.high === "number") {\n' +
-    '\t\t? normalized.toUnsigned()\n' +
+    '\t\tconst high = value.high | 0;\n' +
-    '\t\t: typeof normalized.toSigned === "function"\n' +
+    '\t\tconst lo = BigInt(value.low >>> 0);\n' +
-    '\t\t\t? normalized.toSigned()\n' +
+    '\t\tconst hi = BigInt(value.high >>> 0);\n' +
-    '\t\t\t: normalized;\n' +
+    '\t\tconst combined = (hi << 32n) | lo;\n' +
-    '\treturn prepared.toNumber();\n' +
+    '\t\tif (!unsigned && high < 0) {\n' +
+    '\t\t\treturn Number(combined - (1n << 64n));\n' +
+    '\t\t}\n' +
+    '\t\treturn Number(combined);\n' +
+    '\t}\n' +
+    '\treturn Number(value);\n' +
     '}\n\n'
 
   if (!content.includes('function longToString(')) {

WAProto/index.js

@@ -12,14 +12,21 @@ function longToString(value, unsigned) {
 	if (typeof value === "number") {
 		return String(value);
 	}
-	if (!$util.Long) {
+	// Fast path: convert Long {low, high} directly via native BigInt
-		return String(value);
+	// BigInt.toString() is a native C++ operation, much faster than Long's pure JS division loops
+	if (value && typeof value.low === "number" && typeof value.high === "number") {
+		// Normalize high to signed int32 so the sign-bit check works for inputs
+		// where high is stored unsigned (e.g. raw {low, high} JSON).
+		const high = value.high | 0;
+		const lo = BigInt(value.low >>> 0);
+		const hi = BigInt(value.high >>> 0);
+		const combined = (hi << 32n) | lo;
+		if (!unsigned && high < 0) {
+			return (combined - (1n << 64n)).toString();
+		}
+		return combined.toString();
 	}
-	const normalized = $util.Long.fromValue(value);
+	return String(value);
-	const prepared = unsigned && normalized && typeof normalized.toUnsigned === "function"
-		? normalized.toUnsigned()
-		: normalized;
-	return prepared.toString();
 }
 
 function longToNumber(value, unsigned) {
@@ -27,19 +34,20 @@ function longToNumber(value, unsigned) {
 		return value;
 	}
 	if (typeof value === "string") {
-		const numeric = Number(value);
-		return numeric;
-	}
-	if (!$util.Long) {
 		return Number(value);
 	}
-	const normalized = $util.Long.fromValue(value);
+	// Fast path: convert Long {low, high} directly via native BigInt
-	const prepared = unsigned && normalized && typeof normalized.toUnsigned === "function"
+	if (value && typeof value.low === "number" && typeof value.high === "number") {
-		? normalized.toUnsigned()
+		const high = value.high | 0;
-		: typeof normalized.toSigned === "function"
+		const lo = BigInt(value.low >>> 0);
-			? normalized.toSigned()
+		const hi = BigInt(value.high >>> 0);
-			: normalized;
+		const combined = (hi << 32n) | lo;
-	return prepared.toNumber();
+		if (!unsigned && high < 0) {
+			return Number(combined - (1n << 64n));
+		}
+		return Number(combined);
+	}
+	return Number(value);
 }
 
 export const proto = $root.proto = (() => {

src/Socket/chats.ts

@@ -1060,22 +1060,21 @@ export const makeChatsSocket = (config: SocketConfig) => {
 		}
 	}
 
-	/** sending non-abt props may fix QR scan fail if server expects */
+	/** fetch AB props */
 	const fetchProps = async () => {
-		//TODO: implement both protocol 1 and protocol 2 prop fetching, specially for abKey for WM
 		const resultNode = await query({
 			tag: 'iq',
 			attrs: {
 				to: S_WHATSAPP_NET,
-				xmlns: 'w',
+				xmlns: 'abt',
 				type: 'get'
 			},
 			content: [
 				{
 					tag: 'props',
 					attrs: {
-						protocol: '2',
+						protocol: '1',
-						hash: authState?.creds?.lastPropHash || ''
+						...(authState?.creds?.lastPropHash ? { hash: authState.creds.lastPropHash } : {})
 					}
 				}
 			]

src/Socket/groups.ts

@@ -343,11 +343,13 @@ export const extractGroupMetadata = (result: BinaryNode) => {
 	let descId: string | undefined
 	let descOwner: string | undefined
 	let descOwnerPn: string | undefined
+	let descOwnerUsername: string | undefined
 	let descTime: number | undefined
 	if (descChild) {
 		desc = getBinaryNodeChildString(descChild, 'body')
 		descOwner = descChild.attrs.participant ? jidNormalizedUser(descChild.attrs.participant) : undefined
 		descOwnerPn = descChild.attrs.participant_pn ? jidNormalizedUser(descChild.attrs.participant_pn) : undefined
+		descOwnerUsername = descChild.attrs.participant_username || undefined
 		descTime = +descChild.attrs.t!
 		descId = descChild.attrs.id
 	}
@@ -362,16 +364,19 @@ export const extractGroupMetadata = (result: BinaryNode) => {
 		subject: group.attrs.subject!,
 		subjectOwner: group.attrs.s_o,
 		subjectOwnerPn: group.attrs.s_o_pn,
+		subjectOwnerUsername: group.attrs.s_o_username,
 		subjectTime: +(group.attrs.s_t ?? '0'),
 		size: group.attrs.size ? +group.attrs.size : getBinaryNodeChildren(group, 'participant').length,
 		creation: +(group.attrs.creation ?? '0'),
 		owner: group.attrs.creator ? jidNormalizedUser(group.attrs.creator) : undefined,
 		ownerPn: group.attrs.creator_pn ? jidNormalizedUser(group.attrs.creator_pn) : undefined,
+		ownerUsername: group.attrs.creator_username || undefined,
 		owner_country_code: group.attrs.creator_country_code,
 		desc,
 		descId,
 		descOwner,
 		descOwnerPn,
+		descOwnerUsername,
 		descTime,
 		linkedParent: getBinaryNodeChild(group, 'linked_parent')?.attrs.jid || undefined,
 		restrict: !!getBinaryNodeChild(group, 'locked'),
@@ -386,6 +391,7 @@ export const extractGroupMetadata = (result: BinaryNode) => {
 				id: attrs.jid!,
 				phoneNumber: isLidUser(attrs.jid) && isPnUser(attrs.phone_number) ? attrs.phone_number : undefined,
 				lid: isPnUser(attrs.jid) && isLidUser(attrs.lid) ? attrs.lid : undefined,
+				username: attrs.participant_username || attrs.username || undefined,
 				admin: (attrs.type || null) as GroupParticipant['admin']
 			}
 		}),

src/Socket/messages-recv.ts

@@ -2124,12 +2124,6 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 		if (resolvedRemoteJid) key.remoteJid = resolvedRemoteJid
 		if (resolvedParticipant) key.participant = resolvedParticipant
 
-		if (shouldIgnoreJid(remoteJid!) && remoteJid !== S_WHATSAPP_NET) {
-			logger.trace({ remoteJid }, 'ignoring receipt from jid')
-			await sendMessageAck(node)
-			return
-		}
-
 		const ids = [attrs.id!]
 		if (Array.isArray(content)) {
 			const items = getBinaryNodeChildren(content[0], 'item')
@@ -2205,11 +2199,6 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 
 	const handleNotification = async (node: BinaryNode) => {
 		const remoteJid = node.attrs.from
-		if (shouldIgnoreJid(remoteJid!) && remoteJid !== S_WHATSAPP_NET) {
-			logger.trace({ remoteJid }, 'ignored notification')
-			await sendMessageAck(node)
-			return
-		}
 
 		try {
 			await Promise.all([
@@ -2223,6 +2212,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 							fromMe,
 							participant: node.attrs.participant,
 							participantAlt,
+							participantUsername: node.attrs.participant_username,
 							addressingMode,
 							id: node.attrs.id,
 							...(msg.key || {})
@@ -2231,6 +2221,10 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 						msg.messageTimestamp = +node.attrs.t!
 
 						const fullMsg = proto.WebMessageInfo.fromObject(msg) as WAMessage
+						// Preserve custom WAMessageKey fields (participantAlt, participantUsername,
+						// addressingMode) that proto.WebMessageInfo.fromObject strips because
+						// they aren't part of the proto.MessageKey schema.
+						fullMsg.key = msg.key
 						await upsertMessage(fullMsg, 'append')
 					}
 				})
@@ -2241,12 +2235,6 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 	}
 
 	const handleMessage = async (node: BinaryNode) => {
-		if (shouldIgnoreJid(node.attrs.from!) && node.attrs.from !== S_WHATSAPP_NET) {
-			logger.trace({ from: node.attrs.from }, 'ignored message')
-			await sendMessageAck(node)
-			return
-		}
-
 		const encNode = getBinaryNodeChild(node, 'enc')
 		const unavailableNode = getBinaryNodeChild(node, 'unavailable')
 
@@ -3100,6 +3088,40 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 		identifier: string,
 		exec: (node: BinaryNode) => Promise<void>
 	) => {
+		// Fast path: ack and drop ignored JIDs before entering the buffer/queue.
+		// Skips type='call' so call events are never silently dropped via
+		// shouldIgnoreJid (preserves InfiniteAPI's pre-existing behavior).
+		// Wrapped in try/catch so a throw from shouldIgnoreJid (user callback)
+		// or sendMessageAck (e.g. websocket closed) is routed through
+		// onUnexpectedError instead of becoming an unhandled rejection —
+		// matches the protection processNodeWithBuffer provides.
+		if (type !== 'call') {
+			try {
+				const from = node.attrs.from
+				let ignoreJid = from
+				if (type === 'receipt' && from) {
+					const attrs = node.attrs
+					const isLid = attrs.from!.includes('lid')
+					const isNodeFromMe = areJidsSameUser(
+						attrs.participant || attrs.from,
+						isLid ? authState.creds.me?.lid : authState.creds.me?.id
+					)
+					ignoreJid = !isNodeFromMe || isJidGroup(attrs.from) ? attrs.from : attrs.recipient
+				}
+
+				if (ignoreJid && ignoreJid !== S_WHATSAPP_NET && shouldIgnoreJid(ignoreJid)) {
+					// Plain ack (no NACK error code) preserves InfiniteAPI's prior
+					// behavior — ignored stanzas are an intentional drop, not a
+					// processing failure, so we don't want server-side retries.
+					await sendMessageAck(node)
+					return
+				}
+			} catch (error) {
+				onUnexpectedError(error as Error, identifier)
+				return
+			}
+		}
+
 		const isOffline = !!node.attrs.offline
 
 		if (isOffline) {

src/Types/Contact.ts

@@ -9,6 +9,8 @@ export interface Contact {
 	name?: string
 	/** name of the contact, the contact has set on their own on WA */
 	notify?: string
+	/** username associated with this contact, when provided by WA */
+	username?: string
 	/** I have no idea */
 	verifiedName?: string
 	// Baileys Added

src/Types/Events.ts

@@ -81,6 +81,7 @@ export type BaileysEventMap = {
 		id: string
 		author: string
 		authorPn?: string
+		authorUsername?: string
 		participants: GroupParticipant[]
 		action: ParticipantAction
 	}
@@ -88,6 +89,7 @@ export type BaileysEventMap = {
 		id: string
 		author: string
 		authorPn?: string
+		authorUsername?: string
 		participant: string
 		participantPn?: string
 		action: RequestJoinAction

src/Types/GroupMetadata.ts

@@ -20,17 +20,20 @@ export interface GroupMetadata {
 	addressingMode?: WAMessageAddressingMode
 	owner: string | undefined
 	ownerPn?: string | undefined
+	ownerUsername?: string | undefined
 	owner_country_code?: string | undefined
 	subject: string
 	/** group subject owner */
 	subjectOwner?: string
 	subjectOwnerPn?: string
+	subjectOwnerUsername?: string
 	/** group subject modification date */
 	subjectTime?: number
 	creation?: number
 	desc?: string
 	descOwner?: string
 	descOwnerPn?: string
+	descOwnerUsername?: string
 	descId?: string
 	descTime?: number
 	/** if this group is part of a community, it returns the jid of the community to which it belongs */
@@ -56,6 +59,7 @@ export interface GroupMetadata {
 	/** the person who added you to group or changed some setting in group */
 	author?: string
 	authorPn?: string
+	authorUsername?: string
 }
 
 export interface WAGroupCreateResponse {

src/Types/Message.ts

@@ -19,7 +19,9 @@ export type WAContactMessage = proto.Message.IContactMessage
 export type WAContactsArrayMessage = proto.Message.IContactsArrayMessage
 export type WAMessageKey = proto.IMessageKey & {
 	remoteJidAlt?: string
+	remoteJidUsername?: string
 	participantAlt?: string
+	participantUsername?: string
 	server_id?: string
 	addressingMode?: string
 	isViewOnce?: boolean // TODO: remove out of the message key, place in WebMessageInfo

src/Utils/chat-utils.ts

@@ -1083,6 +1083,7 @@ export const processSyncAction = (
 					action.lidContactAction.firstName ||
 					action.lidContactAction.username ||
 					undefined,
+				username: action.lidContactAction.username || undefined,
 				lid: id!,
 				phoneNumber: undefined
 			}

src/Utils/decode-wa-message.ts

@@ -242,10 +242,14 @@ export function decodeMessageNode(stanza: BinaryNode, meId: string, meLid: strin
 	const key: WAMessageKey = {
 		remoteJid: chatId,
 		remoteJidAlt: !isJidGroup(chatId) ? addressingContext.senderAlt : undefined,
+		remoteJidUsername: !isJidGroup(chatId)
+			? stanza.attrs.peer_recipient_username || stanza.attrs.recipient_username
+			: undefined,
 		fromMe,
 		id: msgId,
 		participant,
 		participantAlt: isJidGroup(chatId) ? addressingContext.senderAlt : undefined,
+		participantUsername: stanza.attrs.participant ? stanza.attrs.participant_username : undefined,
 		addressingMode: addressingContext.addressingMode,
 		...(msgType === 'newsletter' && stanza.attrs.server_id ? { server_id: stanza.attrs.server_id } : {})
 	}

src/Utils/history.ts

@@ -1,5 +1,6 @@
+import { pipeline } from 'stream/promises'
 import { promisify } from 'util'
-import { inflate } from 'zlib'
+import { createInflate, inflate } from 'zlib'
 import { proto } from '../../WAProto/index.js'
 import type { Chat, Contact, LIDMapping, WAMessage } from '../Types'
 import { WAMessageStubType } from '../Types'
@@ -29,16 +30,15 @@ const inflatePromise = promisify(inflate)
  */
 export const downloadHistory = async (msg: proto.Message.IHistorySyncNotification, options: RequestInit) => {
 	const stream = await downloadContentFromMessage(msg, 'md-msg-hist', { options })
-	const bufferArray: Buffer[] = []
+	// Pipe decrypted stream directly through zlib inflate.
-	for await (const chunk of stream) {
+	// Avoids allocating an intermediate buffer for the compressed payload —
-		bufferArray.push(chunk)
+	// memory peaks during 50MB history syncs drop ~50% (PR upstream #2333).
-	}
+	const inflater = createInflate()
-
+	const chunks: Buffer[] = []
-	let buffer: Buffer = Buffer.concat(bufferArray)
+	inflater.on('data', (chunk: Buffer) => chunks.push(chunk))
-
+	await pipeline(stream, inflater)
-	// decompress buffer
-	buffer = await inflatePromise(buffer)
 
+	const buffer = Buffer.concat(chunks)
 	const syncData = proto.HistorySync.decode(buffer)
 	return syncData
 }
@@ -315,6 +315,7 @@ export const processHistoryMessage = (item: proto.IHistorySync, logger?: ILogger
 				contacts.push({
 					id: chatId,
 					name: chat.displayName || chat.name || chat.username || undefined,
+					username: chat.username || undefined,
 					lid: chat.lidJid || chat.accountLid || undefined,
 					phoneNumber: chat.pnJid || undefined
 				})
@@ -360,7 +361,7 @@ export const processHistoryMessage = (item: proto.IHistorySync, logger?: ILogger
 					}
 				}
 
-				chats.push({ ...chat })
+				chats.push(chat)
 			}
 
 			break

src/Utils/messages-media.ts

@@ -618,7 +618,7 @@ export const downloadEncryptedContent = async (
 
 	const output = new Transform({
 		transform(chunk, _, callback) {
-			let data = Buffer.concat([remainingBytes, chunk])
+			let data = remainingBytes.length ? Buffer.concat([remainingBytes, chunk]) : chunk
 
 			const decryptLength = toSmallestChunkSize(data.length)
 			remainingBytes = data.slice(decryptLength)

src/Utils/process-message.ts

@@ -763,12 +763,19 @@ const processMessage = async (
 				id: jid,
 				author: message.key.participant!,
 				authorPn: message.key.participantAlt!,
+				authorUsername: message.key.participantUsername!,
 				participants,
 				action
 			})
 		const emitGroupUpdate = (update: Partial<GroupMetadata>) => {
 			ev.emit('groups.update', [
-				{ id: jid, ...update, author: message.key.participant ?? undefined, authorPn: message.key.participantAlt }
+				{
+					id: jid,
+					...update,
+					author: message.key.participant ?? undefined,
+					authorPn: message.key.participantAlt,
+					authorUsername: message.key.participantUsername
+				}
 			])
 		}
 
@@ -777,6 +784,7 @@ const processMessage = async (
 				id: jid,
 				author: message.key.participant!,
 				authorPn: message.key.participantAlt!,
+				authorUsername: message.key.participantUsername!,
 				participant: participant.lid,
 				participantPn: participant.pn,
 				action,

src/Utils/sync-action-utils.ts

@@ -46,6 +46,7 @@ export const processContactAction = (
 			{
 				id,
 				name: action.fullName || action.firstName || action.username || undefined,
+				username: action.username || undefined,
 				lid: lidJid || undefined,
 				phoneNumber
 			}

src/WAUSync/Protocols/USyncContactProtocol.ts

@@ -13,11 +13,37 @@ export class USyncContactProtocol implements USyncQueryProtocol {
 	}
 
 	getUserElement(user: USyncUser): BinaryNode {
-		//TODO: Implement type / username fields (not yet supported)
+		if (user.phone) {
+			return {
+				tag: 'contact',
+				attrs: {},
+				content: user.phone
+			}
+		}
+
+		if (user.username) {
+			return {
+				tag: 'contact',
+				attrs: {
+					username: user.username,
+					...(user.usernameKey ? { pin: user.usernameKey } : {}),
+					...(user.lid ? { lid: user.lid } : {})
+				}
+			}
+		}
+
+		if (user.type) {
+			return {
+				tag: 'contact',
+				attrs: {
+					type: user.type
+				}
+			}
+		}
+
 		return {
 			tag: 'contact',
-			attrs: {},
+			attrs: {}
-			content: user.phone
 		}
 	}
 

src/WAUSync/Protocols/USyncUsernameProtocol.ts

@@ -0,0 +1,28 @@
+import type { USyncQueryProtocol } from '../../Types/USync'
+import { assertNodeErrorFree, type BinaryNode } from '../../WABinary'
+import { USyncUser } from '../USyncUser'
+
+export class USyncUsernameProtocol implements USyncQueryProtocol {
+	name = 'username'
+
+	getQueryElement(): BinaryNode {
+		return {
+			tag: 'username',
+			attrs: {}
+		}
+	}
+
+	getUserElement(user: USyncUser): BinaryNode | null {
+		void user
+		return null
+	}
+
+	parser(node: BinaryNode): string | null {
+		if (node.tag === 'username') {
+			assertNodeErrorFree(node)
+			return typeof node.content === 'string' ? node.content : null
+		}
+
+		return null
+	}
+}

src/WAUSync/Protocols/index.ts

@@ -2,3 +2,4 @@ export * from './USyncDeviceProtocol'
 export * from './USyncContactProtocol'
 export * from './USyncStatusProtocol'
 export * from './USyncDisappearingModeProtocol'
+export * from './USyncUsernameProtocol'

src/WAUSync/USyncQuery.ts

@@ -6,7 +6,8 @@ import {
 	USyncContactProtocol,
 	USyncDeviceProtocol,
 	USyncDisappearingModeProtocol,
-	USyncStatusProtocol
+	USyncStatusProtocol,
+	USyncUsernameProtocol
 } from './Protocols'
 import { USyncUser } from './USyncUser'
 
@@ -137,4 +138,9 @@ export class USyncQuery {
 		this.protocols.push(new USyncLIDProtocol())
 		return this
 	}
+
+	withUsernameProtocol() {
+		this.protocols.push(new USyncUsernameProtocol())
+		return this
+	}
 }

src/WAUSync/USyncUser.ts

@@ -2,6 +2,8 @@ export class USyncUser {
 	id?: string
 	lid?: string
 	phone?: string
+	username?: string
+	usernameKey?: string
 	type?: string
 	personaId?: string
 
@@ -20,6 +22,16 @@ export class USyncUser {
 		return this
 	}
 
+	withUsername(username: string) {
+		this.username = username
+		return this
+	}
+
+	withUsernameKey(usernameKey: string) {
+		this.usernameKey = usernameKey
+		return this
+	}
+
 	withType(type: string) {
 		this.type = type
 		return this

src/__tests__/bigint-validation.test.ts

@@ -0,0 +1,209 @@
+import Long from 'long'
+import $protobuf from 'protobufjs/minimal.js'
+
+const $util = $protobuf.util
+
+// proto implementation
+function longToStringOld(value: any, unsigned?: boolean): string {
+	if (typeof value === 'string') return value
+	if (typeof value === 'number') return String(value)
+	if (!$util.Long) return String(value)
+	const normalized = ($util.Long as any).fromValue(value)
+	const prepared =
+		unsigned && normalized && typeof normalized.toUnsigned === 'function' ? normalized.toUnsigned() : normalized
+	return prepared.toString()
+}
+
+// bigint implementation
+function longToStringNew(value: any, unsigned?: boolean): string {
+	if (typeof value === 'string') return value
+	if (typeof value === 'number') return String(value)
+	if (value && typeof value.low === 'number' && typeof value.high === 'number') {
+		const high = value.high | 0
+		const lo = BigInt(value.low >>> 0)
+		const hi = BigInt(value.high >>> 0)
+		const combined = (hi << 32n) | lo
+		if (!unsigned && high < 0) {
+			return (combined - (1n << 64n)).toString()
+		}
+
+		return combined.toString()
+	}
+
+	return String(value)
+}
+
+function longToNumberOld(value: any, unsigned?: boolean): number {
+	if (typeof value === 'number') return value
+	if (typeof value === 'string') return Number(value)
+	if (!$util.Long) return Number(value)
+	const normalized = ($util.Long as any).fromValue(value)
+	const prepared =
+		unsigned && normalized && typeof normalized.toUnsigned === 'function'
+			? normalized.toUnsigned()
+			: typeof normalized.toSigned === 'function'
+				? normalized.toSigned()
+				: normalized
+	return prepared.toNumber()
+}
+
+function longToNumberNew(value: any, unsigned?: boolean): number {
+	if (typeof value === 'number') return value
+	if (typeof value === 'string') return Number(value)
+	if (value && typeof value.low === 'number' && typeof value.high === 'number') {
+		const high = value.high | 0
+		const lo = BigInt(value.low >>> 0)
+		const hi = BigInt(value.high >>> 0)
+		const combined = (hi << 32n) | lo
+		if (!unsigned && high < 0) {
+			return Number(combined - (1n << 64n))
+		}
+
+		return Number(combined)
+	}
+
+	return Number(value)
+}
+
+describe('BigInt vs Long equivalence validation', () => {
+	// Test cases: [description, Long value, unsigned flag]
+	const testCases: [string, Long, boolean][] = [
+		// Basic values
+		['zero unsigned', Long.fromNumber(0, true), true],
+		['zero signed', Long.fromNumber(0, false), false],
+		['one unsigned', Long.fromNumber(1, true), true],
+		['one signed', Long.fromNumber(1, false), false],
+
+		// Typical WhatsApp timestamps (seconds since epoch)
+		['timestamp 2023', Long.fromNumber(1700000000, true), true],
+		['timestamp 2025', Long.fromNumber(1750000000, true), true],
+		['timestamp as signed', Long.fromNumber(1700000000, false), false],
+
+		// File sizes
+		['small file', Long.fromNumber(1024, true), true],
+		['medium file 10MB', Long.fromNumber(10485760, true), true],
+		['large file 2GB', Long.fromNumber(2147483648, true), true],
+
+		// Boundary values - 32-bit
+		['max int32', Long.fromNumber(2147483647, false), false],
+		['min int32', Long.fromNumber(-2147483648, false), false],
+		['max uint32', Long.fromNumber(4294967295, true), true],
+
+		// Around MAX_SAFE_INTEGER
+		['MAX_SAFE_INTEGER', Long.fromString('9007199254740991', false), false],
+		['MAX_SAFE_INTEGER + 1', Long.fromString('9007199254740992', false), false],
+		['MAX_SAFE_INTEGER unsigned', Long.fromString('9007199254740991', true), true],
+
+		// Large unsigned values
+		['large unsigned', Long.fromString('9999999999999999999', true), true],
+		['max uint64', Long.fromString('18446744073709551615', true), true],
+		['max uint64 - 1', Long.fromString('18446744073709551614', true), true],
+
+		// Signed negative values
+		['negative one', Long.fromNumber(-1, false), false],
+		['negative small', Long.fromNumber(-100, false), false],
+		['negative large', Long.fromNumber(-2147483648, false), false],
+		['min int64', Long.fromString('-9223372036854775808', false), false],
+		['max int64', Long.fromString('9223372036854775807', false), false],
+		['-1 as signed Long', Long.fromBits(-1, -1, false), false],
+
+		// Tricky bit patterns
+		['high=1, low=0', Long.fromBits(0, 1, true), true],
+		['high=0, low=-1 (0xFFFFFFFF)', Long.fromBits(-1, 0, true), true],
+		['high=-1, low=-1 unsigned (max uint64)', Long.fromBits(-1, -1, true), true],
+		['high=0x7FFFFFFF, low=0xFFFFFFFF (max int64)', Long.fromBits(-1, 0x7fffffff, false), false],
+		['high=0x80000000, low=0 (min int64)', Long.fromBits(0, -2147483648, false), false],
+
+		// Powers of 2
+		['2^32', Long.fromString('4294967296', true), true],
+		['2^32 signed', Long.fromString('4294967296', false), false],
+		['2^48', Long.fromString('281474976710656', true), true],
+		['2^63', Long.fromString('9223372036854775808', true), true]
+	]
+
+	describe('longToString equivalence', () => {
+		for (const [desc, longVal, unsigned] of testCases) {
+			it(`${desc}: Long(${longVal.low}, ${longVal.high}, ${unsigned})`, () => {
+				const oldResult = longToStringOld(longVal, unsigned)
+				const newResult = longToStringNew(longVal, unsigned)
+				expect(newResult).toBe(oldResult)
+			})
+		}
+	})
+
+	describe('longToNumber equivalence', () => {
+		for (const [desc, longVal, unsigned] of testCases) {
+			it(`${desc}: Long(${longVal.low}, ${longVal.high}, ${unsigned})`, () => {
+				const oldResult = longToNumberOld(longVal, unsigned)
+				const newResult = longToNumberNew(longVal, unsigned)
+				// For large values, both may lose precision equally (Number limitation)
+				// So we compare string representations
+				expect(newResult.toString()).toBe(oldResult.toString())
+			})
+		}
+	})
+
+	describe('non-Long inputs (fallback paths)', () => {
+		it('string passthrough', () => {
+			expect(longToStringNew('12345')).toBe('12345')
+			expect(longToStringNew('0')).toBe('0')
+		})
+		it('number passthrough', () => {
+			expect(longToStringNew(42)).toBe('42')
+			expect(longToStringNew(0)).toBe('0')
+			expect(longToStringNew(-1)).toBe('-1')
+		})
+		it('null/undefined fallback', () => {
+			expect(longToStringNew(null)).toBe('null')
+			expect(longToStringNew(undefined)).toBe('undefined')
+		})
+		it('object without low/high', () => {
+			expect(longToStringNew({ foo: 'bar' })).toBe('[object Object]')
+		})
+
+		// Defensive: a raw {low, high} JSON object can carry `high` as an
+		// unsigned 32-bit value (Long.fromBits would normalize via `| 0`,
+		// but plain JSON deserialization does not). Without `value.high | 0`
+		// the sign-bit check fails and the result is interpreted as unsigned.
+		// Upstream Baileys PR #2333 has this latent bug; InfiniteAPI fixes it.
+		it('signed sign-bit detection on raw unsigned high (-1 as {low: -1, high: 4294967295})', () => {
+			const raw = { low: -1, high: 0xffffffff }
+			// signed: -1
+			expect(longToStringNew(raw, false)).toBe('-1')
+			// unsigned: max uint64
+			expect(longToStringNew(raw, true)).toBe('18446744073709551615')
+		})
+
+		it('signed sign-bit detection on raw unsigned high (-4294967296 as {low: 0, high: 4294967295})', () => {
+			const raw = { low: 0, high: 0xffffffff }
+			// signed: -4294967296 (high word = -1 after normalization)
+			expect(longToStringNew(raw, false)).toBe('-4294967296')
+			// unsigned: 0xFFFFFFFF00000000 = 18446744069414584320
+			expect(longToStringNew(raw, true)).toBe('18446744069414584320')
+		})
+	})
+
+	describe('fuzz: random Long values', () => {
+		it('100 random unsigned values match', () => {
+			for (let i = 0; i < 100; i++) {
+				const low = (Math.random() * 0xffffffff) | 0
+				const high = (Math.random() * 0xffffffff) | 0
+				const longVal = Long.fromBits(low, high, true)
+				const oldResult = longToStringOld(longVal, true)
+				const newResult = longToStringNew(longVal, true)
+				expect(newResult).toBe(oldResult)
+			}
+		})
+
+		it('100 random signed values match', () => {
+			for (let i = 0; i < 100; i++) {
+				const low = (Math.random() * 0xffffffff) | 0
+				const high = (Math.random() * 0xffffffff) | 0
+				const longVal = Long.fromBits(low, high, false)
+				const oldResult = longToStringOld(longVal, false)
+				const newResult = longToStringNew(longVal, false)
+				expect(newResult).toBe(oldResult)
+			}
+		})
+	})
+})

src/__tests__/binary/reconnection-sync-skip.test.ts

@@ -0,0 +1,146 @@
+import { jest } from '@jest/globals'
+import { proto, type WAMessage } from '../..'
+import { DEFAULT_CONNECTION_CONFIG } from '../../Defaults'
+import makeWASocket from '../../Socket'
+import { makeSession, mockWebSocket } from '../TestUtils/session'
+
+mockWebSocket()
+
+// chats.ts treats a connection as a reconnection when EITHER signal is true:
+//   1. authState.creds.accountSyncCounter > 0
+//      (at least one full history sync completed in a previous session)
+//   2. socketSkippedOfflineBuffer (forwarded from socket.ts as `skipOfflineBuffer`)
+//      (socket.ts already decided to skip the offline buffer, e.g. because
+//       routingInfo was stale and was discarded on startup)
+// On reconnection, AwaitingInitialSync is skipped and the buffer is flushed
+// immediately so live messages are not held in the initial-sync window.
+describe('Reconnection Sync Skip', () => {
+	it('should skip the history sync wait on reconnection (accountSyncCounter > 0)', async () => {
+		const { state, clear } = await makeSession()
+
+		state.creds.me = { id: '1234567890:1@s.whatsapp.net', name: 'Test User' }
+		// Simulate a session that has already synced before
+		state.creds.accountSyncCounter = 1
+
+		const sock = makeWASocket({
+			...DEFAULT_CONNECTION_CONFIG,
+			auth: state
+		})
+
+		const messageListener = jest.fn()
+		sock.ev.on('messages.upsert', messageListener)
+
+		// Simulate receiving pending notifications (triggers AwaitingInitialSync)
+		sock.ev.emit('connection.update', { receivedPendingNotifications: true })
+
+		// Emit a message immediately after — if the wait is skipped,
+		// the buffer should already be flushed and this message should be delivered.
+		const msg = proto.WebMessageInfo.fromObject({
+			key: { remoteJid: '1234567890@s.whatsapp.net', fromMe: false, id: 'MSG_AFTER_RECONNECT' },
+			messageTimestamp: Date.now() / 1000,
+			message: { conversation: 'Hello after reconnect' }
+		}) as WAMessage
+		sock.ev.emit('messages.upsert', { messages: [msg], type: 'notify' })
+
+		await new Promise(resolve => setTimeout(resolve, 50))
+
+		// Message should be delivered immediately, NOT buffered
+		expect(messageListener).toHaveBeenCalledTimes(1)
+		expect(messageListener).toHaveBeenCalledWith(
+			expect.objectContaining({
+				messages: expect.arrayContaining([expect.objectContaining({ key: msg.key })]),
+				type: 'notify'
+			})
+		)
+
+		await sock.end(new Error('Test completed'))
+		await clear()
+	})
+
+	it('should skip the history sync wait when socketSkippedOfflineBuffer is true (stale routingInfo, accountSyncCounter === 0)', async () => {
+		const { state, clear } = await makeSession()
+
+		state.creds.me = { id: '1234567890:1@s.whatsapp.net', name: 'Test User' }
+		// Fresh-looking session from the counter perspective
+		state.creds.accountSyncCounter = 0
+		// But routingInfo is present and we ask the socket to discard it on start.
+		// socket.ts will set hadStaleRoutingInfo=true → skipOfflineBuffer=true,
+		// which chats.ts forwards as socketSkippedOfflineBuffer. Without this
+		// branch, the buffers would be misaligned (offline buffer skipped while
+		// AwaitingInitialSync still waits) and live messages would stall.
+		state.creds.routingInfo = Buffer.from([1, 2, 3, 4])
+
+		const sock = makeWASocket({
+			...DEFAULT_CONNECTION_CONFIG,
+			auth: state,
+			clearRoutingInfoOnStart: true
+		})
+
+		const messageListener = jest.fn()
+		sock.ev.on('messages.upsert', messageListener)
+
+		sock.ev.emit('connection.update', { receivedPendingNotifications: true })
+
+		const msg = proto.WebMessageInfo.fromObject({
+			key: { remoteJid: '1234567890@s.whatsapp.net', fromMe: false, id: 'MSG_AFTER_STALE_ROUTING' },
+			messageTimestamp: Date.now() / 1000,
+			message: { conversation: 'Hello after stale routing reconnect' }
+		}) as WAMessage
+		sock.ev.emit('messages.upsert', { messages: [msg], type: 'notify' })
+
+		await new Promise(resolve => setTimeout(resolve, 50))
+
+		expect(messageListener).toHaveBeenCalledTimes(1)
+		expect(messageListener).toHaveBeenCalledWith(
+			expect.objectContaining({
+				messages: expect.arrayContaining([expect.objectContaining({ key: msg.key })]),
+				type: 'notify'
+			})
+		)
+
+		await sock.end(new Error('Test completed'))
+		await clear()
+	})
+
+	it('should still wait for history sync on fresh pairing (both signals false)', async () => {
+		const { state, clear } = await makeSession()
+
+		state.creds.me = { id: '1234567890:1@s.whatsapp.net', name: 'Test User' }
+		// Fresh pairing — both reconnect signals are false:
+		// accountSyncCounter is 0 (default) and no stale routingInfo to clear.
+		state.creds.accountSyncCounter = 0
+
+		const sock = makeWASocket({
+			...DEFAULT_CONNECTION_CONFIG,
+			auth: state
+		})
+
+		const messageListener = jest.fn()
+		sock.ev.on('messages.upsert', messageListener)
+
+		sock.ev.emit('connection.update', { receivedPendingNotifications: true })
+
+		const msg = proto.WebMessageInfo.fromObject({
+			key: { remoteJid: '1234567890@s.whatsapp.net', fromMe: false, id: 'MSG_DURING_INITIAL_SYNC' },
+			messageTimestamp: Date.now() / 1000,
+			message: { conversation: 'Hello during initial sync' }
+		}) as WAMessage
+		sock.ev.emit('messages.upsert', { messages: [msg], type: 'notify' })
+
+		await new Promise(resolve => setTimeout(resolve, 50))
+
+		// Message should be BUFFERED (not delivered) because we're waiting for history sync
+		expect(messageListener).toHaveBeenCalledTimes(0)
+
+		// Drain the 2s AwaitingInitialSync timeout (chats.ts:1522) so its callback
+		// doesn't fire after Jest considers the test done — otherwise we get a
+		// "Cannot log after tests are done" warning from the post-teardown flush
+		// and the suite is flagged with --detectOpenHandles. After the timer
+		// fires, syncState becomes Online and the buffer flushes; that delivery
+		// is post-assertion and irrelevant to the test goal.
+		await new Promise(resolve => setTimeout(resolve, 2_100))
+
+		await sock.end(new Error('Test completed'))
+		await clear()
+	}, 10_000)
+})

src/__tests__/proto-tojson-long.test.ts

@@ -1,3 +1,4 @@
+import Long from 'long'
 import '../index.js'
 import { proto } from '../../WAProto/index.js'
 
@@ -28,4 +29,91 @@ describe('proto serialization', () => {
 		const json = message.toJSON()
 		expect(json.message?.imageMessage?.fileLength).toBe('1234567890123456789')
 	})
+
+	it('converts Long objects to strings correctly via BigInt fast path', () => {
+		const message = proto.WebMessageInfo.fromObject({
+			key: {
+				remoteJid: '123@s.whatsapp.net',
+				id: 'ABC123',
+				fromMe: false
+			},
+			messageTimestamp: Long.fromNumber(1700000000, true),
+			message: {
+				imageMessage: {
+					fileLength: Long.fromString('9876543210', true)
+				}
+			}
+		})
+
+		const json = message.toJSON()
+		expect(json.messageTimestamp).toBe('1700000000')
+		expect(json.message?.imageMessage?.fileLength).toBe('9876543210')
+	})
+
+	it('handles large unsigned Long values (> MAX_SAFE_INTEGER)', () => {
+		const message = proto.WebMessageInfo.fromObject({
+			key: {
+				remoteJid: '123@s.whatsapp.net',
+				id: 'ABC123',
+				fromMe: false
+			},
+			messageTimestamp: Long.fromString('18446744073709551615', true), // max uint64
+			message: {
+				imageMessage: {
+					fileLength: Long.fromString('9999999999999999999', true)
+				}
+			}
+		})
+
+		const json = message.toJSON()
+		expect(json.messageTimestamp).toBe('18446744073709551615')
+		expect(json.message?.imageMessage?.fileLength).toBe('9999999999999999999')
+	})
+
+	it('handles zero and small Long values', () => {
+		const message = proto.WebMessageInfo.fromObject({
+			key: {
+				remoteJid: '123@s.whatsapp.net',
+				id: 'ABC123',
+				fromMe: false
+			},
+			messageTimestamp: Long.fromNumber(0, true),
+			message: {
+				imageMessage: {
+					fileLength: Long.fromNumber(1, true)
+				}
+			}
+		})
+
+		const json = message.toJSON()
+		expect(json.messageTimestamp).toBe('0')
+		expect(json.message?.imageMessage?.fileLength).toBe('1')
+	})
+
+	it('roundtrips encode/decode with Long fields preserving values (> MAX_SAFE_INTEGER)', () => {
+		// Use uint64 values above Number.MAX_SAFE_INTEGER (2^53 - 1) so the
+		// roundtrip actually exercises the BigInt fast path on decode->toJSON.
+		// Safe integers would silently work even if longToString fell back to
+		// Number(value).
+		const original = proto.WebMessageInfo.fromObject({
+			key: {
+				remoteJid: '123@s.whatsapp.net',
+				id: 'ABC123',
+				fromMe: false
+			},
+			messageTimestamp: Long.fromString('18446744073709551615', true),
+			message: {
+				imageMessage: {
+					fileLength: Long.fromString('9999999999999999999', true)
+				}
+			}
+		})
+
+		const encoded = proto.WebMessageInfo.encode(original).finish()
+		const decoded = proto.WebMessageInfo.decode(encoded)
+		const json = decoded.toJSON()
+
+		expect(json.messageTimestamp).toBe('18446744073709551615')
+		expect(json.message?.imageMessage?.fileLength).toBe('9999999999999999999')
+	})
 })