node-red-contrib-nostr/dist/core/event.js

Node-RED nodes for seamless Nostr protocol integration. Features robust WebSocket handling, event filtering, and NPUB-based routing. Built with TypeScript for type safety and extensive testing. Perfect for Nostr automation flows.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.EventBuilder = void 0;
const sha2_js_1 = require("@noble/hashes/sha2.js");
const utils_js_1 = require("@noble/hashes/utils.js");
const keys_1 = require("../crypto/keys");
class EventBuilder {
    static async createEvent(kind, content, privateKey, tags = []) {
        const pubkey = await this.keyManager.getPublicKey(privateKey);
        const created_at = Math.floor(Date.now() / 1000);
        const event = {
            kind,
            content,
            created_at,
            pubkey,
            tags,
            id: '',
            sig: ''
        };
        // Calculate event ID
        const serialized = JSON.stringify([
            0,
            event.pubkey,
            event.created_at,
            event.kind,
            event.tags,
            event.content
        ]);
        event.id = (0, utils_js_1.bytesToHex)((0, sha2_js_1.sha256)(Buffer.from(serialized)));
        // Sign the event
        event.sig = await this.keyManager.sign(privateKey, event.id);
        return event;
    }
    static async validateEvent(event) {
        // Verify all required fields exist
        if (!event.id || !event.pubkey || !event.created_at ||
            !event.kind || !event.tags || !event.content || !event.sig) {
            return false;
        }
        // Verify event ID
        const serialized = JSON.stringify([
            0,
            event.pubkey,
            event.created_at,
            event.kind,
            event.tags,
            event.content
        ]);
        const id = (0, utils_js_1.bytesToHex)((0, sha2_js_1.sha256)(Buffer.from(serialized)));
        if (id !== event.id) {
            return false;
        }
        // Verify signature
        return await this.keyManager.verify(event.pubkey, event.id, event.sig);
    }
}
exports.EventBuilder = EventBuilder;
EventBuilder.keyManager = new keys_1.KeyManager();