131 lines
3.2 KiB
JavaScript
131 lines
3.2 KiB
JavaScript
import * as secp from "@noble/secp256k1";
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import { bech32 } from "bech32";
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export async function openFile() {
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return new Promise((resolve, reject) => {
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let elm = document.createElement("input");
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elm.type = "file";
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elm.onchange = (e) => {
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resolve(e.target.files[0]);
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};
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elm.click();
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});
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}
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/**
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* Parse bech32 ids
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* https://github.com/nostr-protocol/nips/blob/master/19.md
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* @param {string} id bech32 id
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*/
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export function parseId(id) {
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const hrp = ["note", "npub", "nsec"];
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try {
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if (hrp.some(a => id.startsWith(a))) {
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return bech32ToHex(id);
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}
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} catch (e) { }
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return id;
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}
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export function bech32ToHex(str) {
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let nKey = bech32.decode(str);
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let buff = bech32.fromWords(nKey.words);
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return secp.utils.bytesToHex(Uint8Array.from(buff));
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}
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/**
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* Decode bech32 to string UTF-8
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* @param {string} str bech32 encoded string
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* @returns
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*/
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export function bech32ToText(str) {
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let decoded = bech32.decode(str, 1000);
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let buf = bech32.fromWords(decoded.words);
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return new TextDecoder().decode(Uint8Array.from(buf));
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}
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/**
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* Convert hex note id to bech32 link url
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* @param {string} hex
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* @returns
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*/
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export function eventLink(hex) {
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return `/e/${hexToBech32("note", hex)}`;
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}
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/**
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* Convert hex to bech32
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* @param {string} hex
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*/
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export function hexToBech32(hrp, hex) {
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if (typeof hex !== "string" || hex.length === 0 || hex.length % 2 != 0) {
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return "";
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}
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try {
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let buf = secp.utils.hexToBytes(hex);
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return bech32.encode(hrp, bech32.toWords(buf));
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} catch (e) {
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console.warn("Invalid hex", hex, e);
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return "";
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}
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}
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/**
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* Convert hex pubkey to bech32 link url
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* @param {string} hex
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* @returns
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*/
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export function profileLink(hex) {
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return `/p/${hexToBech32("npub", hex)}`;
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}
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/**
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* Reaction types
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*/
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export const Reaction = {
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Positive: "+",
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Negative: "-"
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};
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/**
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* Return normalized reaction content
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* @param {string} content
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* @returns
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*/
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export function normalizeReaction(content) {
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switch (content) {
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case "": return Reaction.Positive;
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case "🤙": return Reaction.Positive;
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case "❤️": return Reaction.Positive;
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case "👍": return Reaction.Positive;
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case "💯": return Reaction.Positive;
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case "+": return Reaction.Positive;
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case "-": return Reaction.Negative;
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case "👎": return Reaction.Negative;
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}
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return content;
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}
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/**
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* Converts LNURL service to LN Address
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* @param {string} lnurl
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* @returns
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*/
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export function extractLnAddress(lnurl) {
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// some clients incorrectly set this to LNURL service, patch this
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if (lnurl.toLowerCase().startsWith("lnurl")) {
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let url = bech32ToText(lnurl);
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if (url.startsWith("http")) {
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let parsedUri = new URL(url);
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// is lightning address
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if (parsedUri.pathname.startsWith("/.well-known/lnurlp/")) {
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let pathParts = parsedUri.pathname.split('/');
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let username = pathParts[pathParts.length - 1];
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return `${username}@${parsedUri.hostname}`;
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}
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}
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}
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return lnurl;
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}
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