@periskope/baileys/lib/Signal/Group/sender-key-record.js

WhatsApp API

import { BufferJSON } from '../../Utils/generics.js';
import { SenderKeyState } from './sender-key-state.js';
export class SenderKeyRecord {
    constructor(serialized) {
        this.MAX_STATES = 5;
        this.senderKeyStates = [];
        if (serialized) {
            for (const structure of serialized) {
                this.senderKeyStates.push(new SenderKeyState(null, null, null, null, null, null, structure));
            }
        }
    }
    isEmpty() {
        return this.senderKeyStates.length === 0;
    }
    getSenderKeyState(keyId) {
        if (keyId === undefined && this.senderKeyStates.length) {
            return this.senderKeyStates[this.senderKeyStates.length - 1];
        }
        return this.senderKeyStates.find(state => state.getKeyId() === keyId);
    }
    addSenderKeyState(id, iteration, chainKey, signatureKey) {
        this.senderKeyStates.push(new SenderKeyState(id, iteration, chainKey, null, signatureKey));
        if (this.senderKeyStates.length > this.MAX_STATES) {
            this.senderKeyStates.shift();
        }
    }
    setSenderKeyState(id, iteration, chainKey, keyPair) {
        this.senderKeyStates.length = 0;
        this.senderKeyStates.push(new SenderKeyState(id, iteration, chainKey, keyPair));
    }
    serialize() {
        return this.senderKeyStates.map(state => state.getStructure());
    }
    static deserialize(data) {
        let parsed;
        if (typeof data === 'string') {
            parsed = JSON.parse(data, BufferJSON.reviver);
        }
        else if (data instanceof Uint8Array) {
            const str = Buffer.from(data).toString('utf-8');
            parsed = JSON.parse(str, BufferJSON.reviver);
        }
        else {
            parsed = data;
        }
        return new SenderKeyRecord(parsed);
    }
}
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