141 lines
3.8 KiB
JavaScript
141 lines
3.8 KiB
JavaScript
// event.ts
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import { schnorr as schnorr2 } from "@noble/curves/secp256k1";
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import { sha256 } from "@noble/hashes/sha256";
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import { bytesToHex as bytesToHex2 } from "@noble/hashes/utils";
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// keys.ts
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import { schnorr } from "@noble/curves/secp256k1";
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import { bytesToHex } from "@noble/hashes/utils";
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function getPublicKey(privateKey) {
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return bytesToHex(schnorr.getPublicKey(privateKey));
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}
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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 finishEvent(t, privateKey) {
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const event = t;
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event.pubkey = getPublicKey(privateKey);
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event.id = getEventHash(event);
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event.sig = getSignature(event, privateKey);
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event[verifiedSymbol] = true;
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return event;
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}
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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 bytesToHex2(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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function verifySignature(event) {
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if (typeof event[verifiedSymbol] === "boolean")
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return event[verifiedSymbol];
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const hash = getEventHash(event);
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if (hash !== event.id) {
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return event[verifiedSymbol] = false;
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}
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try {
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return event[verifiedSymbol] = schnorr2.verify(event.sig, hash, event.pubkey);
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} catch (err) {
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return event[verifiedSymbol] = false;
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}
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}
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function getSignature(event, key) {
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return bytesToHex2(schnorr2.sign(getEventHash(event), key));
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}
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// nip18.ts
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function finishRepostEvent(t, reposted, relayUrl, privateKey) {
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return finishEvent(
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{
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kind: 6 /* Repost */,
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tags: [...t.tags ?? [], ["e", reposted.id, relayUrl], ["p", reposted.pubkey]],
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content: t.content === "" ? "" : JSON.stringify(reposted),
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created_at: t.created_at
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},
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privateKey
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);
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}
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function getRepostedEventPointer(event) {
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if (event.kind !== 6 /* Repost */) {
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return void 0;
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}
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let lastETag;
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let lastPTag;
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for (let i = event.tags.length - 1; i >= 0 && (lastETag === void 0 || lastPTag === void 0); i--) {
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const tag = event.tags[i];
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if (tag.length >= 2) {
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if (tag[0] === "e" && lastETag === void 0) {
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lastETag = tag;
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} else if (tag[0] === "p" && lastPTag === void 0) {
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lastPTag = tag;
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}
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}
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}
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if (lastETag === void 0) {
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return void 0;
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}
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return {
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id: lastETag[1],
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relays: [lastETag[2], lastPTag?.[2]].filter((x) => typeof x === "string"),
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author: lastPTag?.[1]
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};
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}
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function getRepostedEvent(event, { skipVerification } = {}) {
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const pointer = getRepostedEventPointer(event);
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if (pointer === void 0 || event.content === "") {
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return void 0;
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}
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let repostedEvent;
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try {
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repostedEvent = JSON.parse(event.content);
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} catch (error) {
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return void 0;
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}
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if (repostedEvent.id !== pointer.id) {
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return void 0;
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}
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if (!skipVerification && !verifySignature(repostedEvent)) {
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return void 0;
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}
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return repostedEvent;
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}
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export {
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finishRepostEvent,
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getRepostedEvent,
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getRepostedEventPointer
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};
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