fix(types): remove non-null assertions across 14 files

Files fixed:
- messages-recv.ts: 58 assertions → null guards, meId extraction, optional chaining
- process-message.ts: 38 assertions → remoteJid/participant guards, proto field checks
- chat-utils.ts: 31 assertions → proto field validation with Boom errors
- messages-send.ts: 20 assertions → meId extraction, participant guards
- chats.ts: 15 assertions → me guard, firstChild guard, jid guards
- messages.ts: 14 assertions → originalFilePath guard, key guards
- groups.ts: 12 assertions → attrs fallbacks with ??
- validate-connection.ts: 9 assertions → grouped proto field validation
- generics.ts: 1 assertion → versionLine guard
- history.ts: 2 assertions → key guards
- libsignal.ts: 1 assertion → deviceId guard
- sender-key-message.ts: 3 assertions → proto guards
- UsyncBotProfileProtocol.ts: 2 assertions → attrs guards
- example.ts: 3 assertions → optional chaining

https://claude.ai/code/session_01E2cfX1N3sJgCJBTvzGazSG

src/Socket/messages-recv.ts

@@ -274,7 +274,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 			case 'view':
 				const viewUpdate = {
 					id: from,
-					server_id: child.attrs.message_id!,
+					server_id: child.attrs.message_id ?? '',
 					count: parseInt(child.content?.toString() || '0', 10)
 				}
 				ev.emit('newsletter.view', viewUpdate)
@@ -284,9 +284,9 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 				const participantUpdate = {
 					id: from,
 					author,
-					user: child.attrs.jid!,
-					action: child.attrs.action!,
-					new_role: child.attrs.role!
+					user: child.attrs.jid ?? '',
+					action: child.attrs.action ?? '',
+					new_role: child.attrs.role ?? ''
 				}
 				ev.emit('newsletter-participants.update', participantUpdate)
 				break
@@ -325,7 +325,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 								fromMe: false // TODO: is this really true though
 							},
 							message: messageProto,
-							messageTimestamp: +child.attrs.t!
+							messageTimestamp: +(child.attrs.t ?? 0)
 						}).toJSON() as WAMessage
 						await upsertMessage(fullMessage, 'append')
 						logger.info('Processed plaintext newsletter message')
@@ -346,8 +346,8 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 		const stanza: BinaryNode = {
 			tag: 'ack',
 			attrs: {
-				id: attrs.id!,
-				to: attrs.from!,
+				id: attrs.id ?? '',
+				to: attrs.from ?? '',
 				class: tag
 			}
 		}
@@ -372,7 +372,9 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 		}
 
 		if (tag === 'message' && getBinaryNodeChild({ tag, attrs, content }, 'unavailable')) {
-			stanza.attrs.from = authState.creds.me!.id
+			const meId = authState.creds.me?.id
+			if (!meId) throw new Boom('Not authenticated', { statusCode: 401 })
+			stanza.attrs.from = meId
 		}
 
 		logger.debug({ recv: { tag, attrs }, sent: stanza.attrs }, 'sent ack')
@@ -380,10 +382,12 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 	}
 
 	const rejectCall = async (callId: string, callFrom: string) => {
+		const meId = authState.creds.me?.id
+		if (!meId) throw new Boom('Not authenticated', { statusCode: 401 })
 		const stanza: BinaryNode = {
 			tag: 'call',
 			attrs: {
-				from: authState.creds.me!.id,
+				from: meId,
 				to: callFrom
 			},
 			content: [
@@ -402,9 +406,16 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 	}
 
 	const sendRetryRequest = async (node: BinaryNode, forceIncludeKeys = false) => {
-		const { fullMessage } = decodeMessageNode(node, authState.creds.me!.id, authState.creds.me!.lid || '')
+		const meId = authState.creds.me?.id
+		if (!meId) throw new Boom('Not authenticated', { statusCode: 401 })
+		const meLid = authState.creds.me?.lid || ''
+		const { fullMessage } = decodeMessageNode(node, meId, meLid)
 		const { key: msgKey } = fullMessage
-		const msgId = msgKey.id!
+		const msgId = msgKey.id
+		if (!msgId) {
+			logger.debug({ node }, 'missing message id in retry request')
+			return
+		}
 
 		if (messageRetryManager) {
 			// Check if we've exceeded max retries using the new system
@@ -442,7 +453,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 		const retryCount = (await msgRetryCache.get<number>(key)) || 1
 
 		const { account, signedPreKey, signedIdentityKey: identityKey } = authState.creds
-		const fromJid = node.attrs.from!
+		const fromJid = node.attrs.from ?? ''
 
 		// Check if we should recreate the session
 		let shouldRecreateSession = false
@@ -499,22 +510,23 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 			}
 		}
 
-		const deviceIdentity = encodeSignedDeviceIdentity(account!, true)
+		if (!account) throw new Boom('Account not available', { statusCode: 401 })
+		const deviceIdentity = encodeSignedDeviceIdentity(account, true)
 		await authState.keys.transaction(async () => {
 			const receipt: BinaryNode = {
 				tag: 'receipt',
 				attrs: {
 					id: msgId,
 					type: 'retry',
-					to: node.attrs.from!
+					to: node.attrs.from ?? ''
 				},
 				content: [
 					{
 						tag: 'retry',
 						attrs: {
 							count: retryCount.toString(),
-							id: node.attrs.id!,
-							t: node.attrs.t!,
+							id: node.attrs.id ?? '',
+							t: node.attrs.t ?? '',
 							v: '1',
 							// ADD ERROR FIELD
 							error: '0'
@@ -540,16 +552,19 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 				const { update, preKeys } = await getNextPreKeys(authState, 1)
 
 				const [keyId] = Object.keys(preKeys)
-				const key = preKeys[+keyId!]
+				if (!keyId) throw new Boom('No pre-keys available')
+				const key = preKeys[+keyId]
+				if (!key) throw new Boom('Pre-key not found')
 
-				const content = receipt.content! as BinaryNode[]
+				const content = receipt.content as BinaryNode[]
+				if (!content) throw new Boom('Receipt content missing')
 				content.push({
 					tag: 'keys',
 					attrs: {},
 					content: [
 						{ tag: 'type', attrs: {}, content: Buffer.from(KEY_BUNDLE_TYPE) },
 						{ tag: 'identity', attrs: {}, content: identityKey.public },
-						xmppPreKey(key!, +keyId!),
+						xmppPreKey(key, +keyId),
 						xmppSignedPreKey(signedPreKey),
 						{ tag: 'device-identity', attrs: {}, content: deviceIdentity }
 					]
@@ -568,7 +583,9 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 		const from = node.attrs.from
 		if (from === S_WHATSAPP_NET) {
 			const countChild = getBinaryNodeChild(node, 'count')
-			const count = +countChild!.attrs.value!
+			const countVal = countChild?.attrs?.value
+			if (!countVal) return
+			const count = +countVal
 			const shouldUploadMorePreKeys = count < MIN_PREKEY_COUNT
 
 			logger.debug({ count, shouldUploadMorePreKeys }, 'recv pre-key count')
@@ -597,8 +614,8 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 		const actingParticipantLid = fullNode.attrs.participant
 		const actingParticipantPn = fullNode.attrs.participant_pn
 
-		const affectedParticipantLid = getBinaryNodeChild(child, 'participant')?.attrs?.jid || actingParticipantLid!
-		const affectedParticipantPn = getBinaryNodeChild(child, 'participant')?.attrs?.phone_number || actingParticipantPn!
+		const affectedParticipantLid = getBinaryNodeChild(child, 'participant')?.attrs?.jid || actingParticipantLid || ''
+		const affectedParticipantPn = getBinaryNodeChild(child, 'participant')?.attrs?.phone_number || actingParticipantPn || ''
 
 		switch (child?.tag) {
 			case 'create':
@@ -633,7 +650,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 				}
 				break
 			case 'modify':
-				const oldNumber = getBinaryNodeChildren(child, 'participant').map(p => p.attrs.jid!)
+				const oldNumber = getBinaryNodeChildren(child, 'participant').map(p => p.attrs.jid ?? '').filter(Boolean)
 				msg.messageStubParameters = oldNumber || []
 				msg.messageStubType = WAMessageStubType.GROUP_PARTICIPANT_CHANGE_NUMBER
 				break
@@ -648,7 +665,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 				const participants = getBinaryNodeChildren(child, 'participant').map(({ attrs }) => {
 					// TODO: Store LID MAPPINGS
 					return {
-						id: attrs.jid!,
+						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,
 						admin: (attrs.type || null) as GroupParticipant['admin']
@@ -659,8 +676,8 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 					participants.length === 1 &&
 					// if recv. "remove" message and sender removed themselves
 					// mark as left
-					(areJidsSameUser(participants[0]!.id, actingParticipantLid) ||
-						areJidsSameUser(participants[0]!.id, actingParticipantPn)) &&
+					(areJidsSameUser(participants[0]?.id, actingParticipantLid) ||
+						areJidsSameUser(participants[0]?.id, actingParticipantPn)) &&
 					child.tag === 'remove'
 				) {
 					msg.messageStubType = WAMessageStubType.GROUP_PARTICIPANT_LEAVE
@@ -670,7 +687,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 				break
 			case 'subject':
 				msg.messageStubType = WAMessageStubType.GROUP_CHANGE_SUBJECT
-				msg.messageStubParameters = [child.attrs.subject!]
+				msg.messageStubParameters = [child.attrs.subject ?? '']
 				break
 			case 'description':
 				const description = getBinaryNodeChild(child, 'body')?.content?.toString()
@@ -689,7 +706,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 				break
 			case 'invite':
 				msg.messageStubType = WAMessageStubType.GROUP_CHANGE_INVITE_LINK
-				msg.messageStubParameters = [child.attrs.code!]
+				msg.messageStubParameters = [child.attrs.code ?? '']
 				break
 			case 'member_add_mode':
 				const addMode = child.content
@@ -703,7 +720,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 				const approvalMode = getBinaryNodeChild(child, 'group_join')
 				if (approvalMode) {
 					msg.messageStubType = WAMessageStubType.GROUP_MEMBERSHIP_JOIN_APPROVAL_MODE
-					msg.messageStubParameters = [approvalMode.attrs.state!]
+					msg.messageStubParameters = [approvalMode.attrs.state ?? '']
 				}
 
 				break
@@ -712,7 +729,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 				msg.messageStubParameters = [
 					JSON.stringify({ lid: affectedParticipantLid, pn: affectedParticipantPn }),
 					'created',
-					child.attrs.request_method!
+					child.attrs.request_method ?? ''
 				]
 				break
 			case 'revoked_membership_requests':
@@ -742,7 +759,8 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 				break
 			case 'w:gp2':
 				// TODO: HANDLE PARTICIPANT_PN
-				handleGroupNotification(node, child!, result)
+				if (!child) break
+				handleGroupNotification(node, child, result)
 				break
 			case 'mediaretry':
 				const event = decodeMediaRetryNode(node)
@@ -752,10 +770,11 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
 				await handleEncryptNotification(node)
 				break
 			case 'devices':
+				if (!child) break
 				const devices = getBinaryNodeChildren(child, 'device')
 				if (
-					areJidsSameUser(child!.attrs.jid, authState.creds.me!.id) ||
-					areJidsSameUser(child!.attrs.lid, authState.creds.me!.lid)
+					areJidsSameUser(child.attrs.jid, authState.creds.me?.id) ||
+					areJidsSameUser(child.attrs.lid, authState.creds.me?.lid)
 				) {
 					const deviceData = devices.map(d => ({ id: d.attrs.jid, lid: d.attrs.lid }))
 					logger.info({ deviceData }, 'my own devices changed')