43 lines
956 B
TypeScript
43 lines
956 B
TypeScript
/**
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* A UNIX timestamp.
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*/
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export type Timestamp = number
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/**
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* Calculate the unix timestamp (seconds since epoch) of the `Date`. If no date is specified,
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* return the current unix timestamp.
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*/
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export function unixTimestamp(date?: Date): Timestamp {
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return Math.floor((date ?? new Date()).getTime() / 1000)
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}
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/**
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* Throw if the parameter is null or undefined. Return the parameter otherwise.
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*/
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export function defined<T>(v: T | undefined | null): T {
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if (v === undefined || v === null) {
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throw new NostrError("bug: unexpected undefined")
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}
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return v
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}
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/**
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* Parse the JSON and throw a @see {@link NostrError} in case of error.
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*/
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export function parseJson(data: string) {
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try {
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return JSON.parse(data)
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} catch (e) {
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throw new NostrError(`invalid json: ${e}: ${data}`)
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}
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}
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/**
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* The error thrown by this library.
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*/
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export class NostrError extends Error {
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constructor(message?: string) {
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super(message)
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}
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}
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