node-red-contrib-nostr/dist/nips/nip04.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.NIP04 = void 0;
const secp256k1_js_1 = require("@noble/curves/secp256k1.js");
const utils_js_1 = require("@noble/hashes/utils.js");
const sha2_js_1 = require("@noble/hashes/sha2.js");
const event_1 = require("../core/event");
class NIP04 {
    static async encrypt(privateKey, publicKey, _text) {
        const sharedPoint = secp256k1_js_1.secp256k1.getSharedSecret((0, utils_js_1.hexToBytes)(privateKey), (0, utils_js_1.hexToBytes)(publicKey));
        const sharedX = sharedPoint.slice(1, 33);
        // In a real implementation, we'd use this shared secret with
        // proper encryption. This is just a placeholder.
        const key = (0, sha2_js_1.sha256)(sharedX);
        // TODO: Implement actual encryption using AES-256-CBC
        return (0, utils_js_1.bytesToHex)(key);
    }
    static async decrypt(privateKey, publicKey, _encryptedText) {
        const sharedPoint = secp256k1_js_1.secp256k1.getSharedSecret((0, utils_js_1.hexToBytes)(privateKey), (0, utils_js_1.hexToBytes)(publicKey));
        const _sharedX = sharedPoint.slice(1, 33);
        // TODO: Implement actual decryption using AES-256-CBC
        return "decrypted text";
    }
    static async createEncryptedEvent(recipientPubkey, content, privateKey) {
        const encryptedContent = await this.encrypt(privateKey, recipientPubkey, content);
        const tags = [['p', recipientPubkey]];
        return await event_1.EventBuilder.createEvent(4, // NIP-04 Direct Message kind
        encryptedContent, privateKey, tags);
    }
    static async decryptEvent(event, privateKey) {
        if (event.kind !== 4)
            throw new Error('Not a DM event');
        const recipientTag = event.tags.find(tag => tag[0] === 'p');
        if (!recipientTag)
            throw new Error('No recipient tag found');
        return await this.decrypt(privateKey, event.pubkey, event.content);
    }
    static getDMFilter(pubkey, otherPubkey) {
        const filter = {
            kinds: [4],
            limit: 100
        };
        if (otherPubkey) {
            filter['#p'] = [otherPubkey];
            filter.authors = [pubkey];
        }
        else {
            filter.$or = [
                { authors: [pubkey] },
                { '#p': [pubkey] }
            ];
        }
        return filter;
    }
}
exports.NIP04 = NIP04;