43 lines
928 B
JavaScript
43 lines
928 B
JavaScript
// nip40.ts
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function getExpiration(event) {
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const tag = event.tags.find(([name]) => name === "expiration");
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if (tag) {
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return new Date(parseInt(tag[1]) * 1e3);
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}
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}
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function isEventExpired(event) {
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const expiration = getExpiration(event);
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if (expiration) {
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return Date.now() > expiration.getTime();
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} else {
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return false;
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}
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}
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async function waitForExpire(event) {
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const expiration = getExpiration(event);
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if (expiration) {
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const diff = expiration.getTime() - Date.now();
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if (diff > 0) {
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await sleep(diff);
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return event;
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} else {
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return event;
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}
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} else {
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throw new Error("Event has no expiration");
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}
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}
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function onExpire(event, callback) {
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waitForExpire(event).then(callback).catch(() => {
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});
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}
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function sleep(ms) {
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return new Promise((resolve) => setTimeout(resolve, ms));
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}
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export {
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getExpiration,
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isEventExpired,
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onExpire,
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waitForExpire
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};
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