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// Returns true if the message has an expiration in the past, false otherwise.
export const expired = (event: object): boolean => {
const expiryTime = expiration(event);
return expiryTime !== null && Date.now() / 1000 >= expiryTime;
}
// Returns the provided event's expiration time, as a Unix ms integer.
// If it has none, returns null.
export const expiration = (event: object): number | null => {
for (const tag of event.tags) {
if (tag[0] == "expiration") {
return parseInt(tag[1]);
}
}
return null;
}
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