Jon Staab
54 lines
1.4 KiB
TypeScript
54 lines
1.4 KiB
TypeScript
import {StampedEvent} from '@welshman/util'
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import {hash, own, Sign, ISigner, EncryptionImplementation} from '../util'
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export type Nip07 = {
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signEvent: Sign
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nip04: EncryptionImplementation
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nip44: EncryptionImplementation
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getPublicKey: () => string | undefined
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}
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export const getNip07 = () => (window as {nostr?: Nip07}).nostr
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export class Nip07Signer implements ISigner {
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#lock = Promise.resolve()
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#then = async <T>(f: (ext: Nip07) => T | Promise<T>) => {
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const promise = this.#lock.then(() => {
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const ext = getNip07()
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if (!ext) throw new Error("Nip07 is not enabled")
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return f(ext)
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})
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// Recover from errors
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this.#lock = promise.then(() => undefined, () => undefined)
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return promise
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}
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getPubkey = async () => getNip07()!.getPublicKey()!
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sign = async (template: StampedEvent) => {
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const event = hash(own(template, await this.getPubkey()))
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return this.#then(ext => ext.signEvent(event))
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}
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nip04 = {
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encrypt: (pubkey: string, message: string) =>
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this.#then(ext => ext.nip04.encrypt(pubkey, message)),
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decrypt: (pubkey: string, message: string) =>
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this.#then(ext => ext.nip04.decrypt(pubkey, message)),
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}
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nip44 = {
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encrypt: (pubkey: string, message: string) =>
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this.#then(ext => ext.nip44.encrypt(pubkey, message)),
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decrypt: (pubkey: string, message: string) =>
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this.#then(ext => ext.nip44.decrypt(pubkey, message)),
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}
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}
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