86 lines
2.1 KiB
JavaScript
86 lines
2.1 KiB
JavaScript
// event.ts
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import { schnorr } from "@noble/curves/secp256k1";
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import { sha256 } from "@noble/hashes/sha256";
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import { bytesToHex } from "@noble/hashes/utils";
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// utils.ts
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var utf8Decoder = new TextDecoder("utf-8");
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var utf8Encoder = new TextEncoder();
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// event.ts
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var verifiedSymbol = Symbol("verified");
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function serializeEvent(evt) {
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if (!validateEvent(evt))
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throw new Error("can't serialize event with wrong or missing properties");
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return JSON.stringify([0, evt.pubkey, evt.created_at, evt.kind, evt.tags, evt.content]);
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}
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function getEventHash(event) {
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let eventHash = sha256(utf8Encoder.encode(serializeEvent(event)));
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return bytesToHex(eventHash);
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}
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var isRecord = (obj) => obj instanceof Object;
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function validateEvent(event) {
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if (!isRecord(event))
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return false;
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if (typeof event.kind !== "number")
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return false;
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if (typeof event.content !== "string")
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return false;
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if (typeof event.created_at !== "number")
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return false;
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if (typeof event.pubkey !== "string")
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return false;
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if (!event.pubkey.match(/^[a-f0-9]{64}$/))
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return false;
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if (!Array.isArray(event.tags))
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return false;
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for (let i = 0; i < event.tags.length; i++) {
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let tag = event.tags[i];
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if (!Array.isArray(tag))
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return false;
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for (let j = 0; j < tag.length; j++) {
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if (typeof tag[j] === "object")
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return false;
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}
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}
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return true;
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}
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// nip13.ts
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function getPow(hex) {
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let count = 0;
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for (let i = 0; i < hex.length; i++) {
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const nibble = parseInt(hex[i], 16);
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if (nibble === 0) {
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count += 4;
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} else {
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count += Math.clz32(nibble) - 28;
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break;
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}
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}
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return count;
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}
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function minePow(unsigned, difficulty) {
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let count = 0;
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const event = unsigned;
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const tag = ["nonce", count.toString(), difficulty.toString()];
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event.tags.push(tag);
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while (true) {
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const now = Math.floor(new Date().getTime() / 1e3);
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if (now !== event.created_at) {
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count = 0;
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event.created_at = now;
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}
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tag[1] = (++count).toString();
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event.id = getEventHash(event);
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if (getPow(event.id) >= difficulty) {
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break;
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}
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}
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return event;
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}
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export {
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getPow,
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minePow
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};
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