@periskope/baileys/lib/Signal/lid-mapping.js

WhatsApp API

import { LRUCache } from 'lru-cache';
import logger from '../Utils/logger.js';
import { isLidUser, isPnUser, jidDecode } from '../WABinary/index.js';
export class LIDMappingStore {
    constructor(keys, onWhatsAppFunc) {
        this.mappingCache = new LRUCache({
            ttl: 7 * 24 * 60 * 60 * 1000, // 7 days
            ttlAutopurge: true,
            updateAgeOnGet: true
        });
        this.keys = keys;
        this.onWhatsAppFunc = onWhatsAppFunc; // needed to get LID from PN if not found
    }
    /**
     * Store LID-PN mapping - USER LEVEL
     */
    async storeLIDPNMappings(pairs) {
        // Validate inputs
        const pairMap = {};
        for (const { lid, pn } of pairs) {
            if (!((isLidUser(lid) && isPnUser(pn)) || (isPnUser(lid) && isLidUser(pn)))) {
                logger.warn(`Invalid LID-PN mapping: ${lid}, ${pn}`);
                continue;
            }
            const [lidJid, pnJid] = isLidUser(lid) ? [lid, pn] : [pn, lid];
            const lidDecoded = jidDecode(lidJid);
            const pnDecoded = jidDecode(pnJid);
            if (!lidDecoded || !pnDecoded)
                return;
            const pnUser = pnDecoded.user;
            const lidUser = lidDecoded.user;
            // Check if mapping already exists (cache first, then database)
            let existingLidUser = this.mappingCache.get(`pn:${pnUser}`);
            if (!existingLidUser) {
                // Cache miss - check database
                const stored = await this.keys.get('lid-mapping', [pnUser]);
                existingLidUser = stored[pnUser];
                if (existingLidUser) {
                    // Update cache with database value
                    this.mappingCache.set(`pn:${pnUser}`, existingLidUser);
                    this.mappingCache.set(`lid:${existingLidUser}`, pnUser);
                }
            }
            if (existingLidUser === lidUser) {
                logger.debug({ pnUser, lidUser }, 'LID mapping already exists, skipping');
                continue;
            }
            pairMap[pnUser] = lidUser;
        }
        logger.trace({ pairMap }, `Storing ${Object.keys(pairMap).length} pn mappings`);
        await this.keys.transaction(async () => {
            for (const [pnUser, lidUser] of Object.entries(pairMap)) {
                await this.keys.set({
                    'lid-mapping': {
                        [pnUser]: lidUser, // "554396160286" -> "102765716062358"
                        [`${lidUser}_reverse`]: pnUser // "102765716062358_reverse" -> "554396160286"
                    }
                });
                // Update cache with both directions
                this.mappingCache.set(`pn:${pnUser}`, lidUser);
                this.mappingCache.set(`lid:${lidUser}`, pnUser);
            }
        }, 'lid-mapping');
    }
    /**
     * Get LID for PN - Returns device-specific LID based on user mapping
     */
    async getLIDForPN(pn) {
        if (!isPnUser(pn))
            return null;
        const decoded = jidDecode(pn);
        if (!decoded)
            return null;
        // Check cache first for PN → LID mapping
        const pnUser = decoded.user;
        let lidUser = this.mappingCache.get(`pn:${pnUser}`);
        if (!lidUser) {
            // Cache miss - check database
            const stored = await this.keys.get('lid-mapping', [pnUser]);
            lidUser = stored[pnUser];
            if (lidUser) {
                // Cache the database result
                this.mappingCache.set(`pn:${pnUser}`, lidUser);
            }
            else {
                // Not in database - try USync
                logger.trace(`No LID mapping found for PN user ${pnUser}; getting from USync`);
                const { exists, lid } = (await this.onWhatsAppFunc?.(pn))?.[0]; // this function already adds LIDs to mapping
                if (exists && lid) {
                    lidUser = jidDecode(lid)?.user;
                    if (lidUser) {
                        // Cache the USync result
                        this.mappingCache.set(`pn:${pnUser}`, lidUser);
                    }
                }
                else {
                    return null;
                }
            }
        }
        if (typeof lidUser !== 'string' || !lidUser) {
            logger.warn(`Invalid or empty LID user for PN ${pn}: lidUser = "${lidUser}"`);
            return null;
        }
        // Push the PN device ID to the LID to maintain device separation
        const pnDevice = decoded.device !== undefined ? decoded.device : 0;
        const deviceSpecificLid = `${lidUser}:${pnDevice}@lid`;
        logger.trace(`getLIDForPN: ${pn} → ${deviceSpecificLid} (user mapping with device ${pnDevice})`);
        return deviceSpecificLid;
    }
    /**
     * Get PN for LID - USER LEVEL with device construction
     */
    async getPNForLID(lid) {
        if (!isLidUser(lid))
            return null;
        const decoded = jidDecode(lid);
        if (!decoded)
            return null;
        // Check cache first for LID → PN mapping
        const lidUser = decoded.user;
        let pnUser = this.mappingCache.get(`lid:${lidUser}`);
        if (!pnUser || typeof pnUser !== 'string') {
            // Cache miss - check database
            const stored = await this.keys.get('lid-mapping', [`${lidUser}_reverse`]);
            pnUser = stored[`${lidUser}_reverse`];
            if (!pnUser || typeof pnUser !== 'string') {
                logger.trace(`No reverse mapping found for LID user: ${lidUser}`);
                return null;
            }
            this.mappingCache.set(`lid:${lidUser}`, pnUser);
        }
        // Construct device-specific PN JID
        const lidDevice = decoded.device !== undefined ? decoded.device : 0;
        const pnJid = `${pnUser}:${lidDevice}@s.whatsapp.net`;
        logger.trace(`Found reverse mapping: ${lid} → ${pnJid}`);
        return pnJid;
    }
}
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