46 lines
1.5 KiB
TypeScript
46 lines
1.5 KiB
TypeScript
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// Raw-nsec signing — an *unsafe* login fallback for when there's no NIP-07
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// extension or NIP-46 signer available (testing, kiosk devices, etc). The
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// private key only ever lives in page memory for the duration of one sign
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// call; it's never persisted (no localStorage/sessionStorage), matching how
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// the NIP-07 path also never retains key material — only the resulting
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// session cookie survives.
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import { nip19 } from 'nostr-tools';
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import { finalizeEvent, getPublicKey } from 'nostr-tools/pure';
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import type { SignedEvent, UnsignedEvent } from './nip07';
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export function isValidNsec(nsec: string): boolean {
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try {
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return nip19.decode(nsec.trim()).type === 'nsec';
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} catch {
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return false;
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}
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}
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function decodeNsec(nsec: string): Uint8Array {
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const decoded = nip19.decode(nsec.trim());
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if (decoded.type !== 'nsec') throw new Error('Not an nsec key');
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return decoded.data;
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}
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export function nsecPubkey(nsec: string): string {
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return getPublicKey(decodeNsec(nsec));
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}
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function signWithNsec(nsec: string, event: UnsignedEvent): SignedEvent {
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return finalizeEvent(event, decodeNsec(nsec));
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}
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/** Sign a NIP-98 (kind 27235) event with a raw nsec and return the Authorization header value. */
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export function buildNip98HeaderWithNsec(nsec: string, url: string, method: string): string {
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const event = signWithNsec(nsec, {
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kind: 27235,
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created_at: Math.floor(Date.now() / 1000),
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content: '',
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tags: [
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['u', url],
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['method', method],
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],
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});
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return `Nostr ${btoa(JSON.stringify(event))}`;
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}
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