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t348.mjs
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// https://github.com/wizzard0/t348-loader CHANGELOG
// MIT license. Includes code from https://github.com/alangpierce/sucrase and https://github.com/paulmillr/noble-hashes
// p3702: node20 support
// p3217: public release
// p3115: resolve "./something" -> "./something.ts" too
// p2a22: path in syntax error message
// p2808: log caching events
// p2723: don't nag unknownCommand (require t348 prefix for arg0)
// p2720: node18 support
// p2628: correct sourceURL in browser
// p2621: handle empty publish urls
// p2423: browser support for non-t348 .js/.ts imports;
// ignore commented out imports
// maybe fix relative URLs for path imports
// fix loading t348 urns from different base paths. browser, node...
// p2421: browser support, omg. p2422: fixes.
// p2411: correct stack traces and noEmit!
// p2410: typescript! (via sucrase)
// added notes p2401, package.json skip 1220
// copied p2321, fix 1634, refactor 1656
//
// important: keep this single-file because this is a bootstrapper
// see usage BELOW
//
// UNSUPPORTED: CommonJS, import cycles
// detect cycles: madge --warning --circular --extensions ts,js --image deps-circular.svg <ENTRYPOINT/FOLDER>
// https://github.com/pahen/madge
/* USAGE
download everything in ./t348repo if T348CACHE, logs if TEST/DEBUG/VERBOSE is set
"via348": "node --experimental-loader=./t348.mjs index.js param1",
"cache348": "T348CACHE=1 DEBUG=1 node --experimental-loader=./t348.mjs index.js param1",
upload file (idempotent, can also re-upload from repo though this will kill meta filename)
node ./t348.mjs t348pack something.js
change local repo in package.json: use .ts extension if you need IDE to eat typescript
"type": "module",
"t348": { "repo": "./t348repo/t0$HASH.js" },
assumes node v16/v18. use mjs extension if no package.json present.
BROWSER USAGE:
note: only 1 script tag with type="text/typescript" is supported
default global url is $T348_GLOBAL_REPO ($HASH will be replaced with h48)
TRACE and T348_GLOBAL_REPO can be set in localStorage as t348_trace, t348_global_repo etc.
<head>
<script type="module" src="https://website.com/path/t0lYxZJvli.js#t348"></script>
<!-- OR -->
<script src="t348.mjs" type="module" data-global-repo="./t348repo/t0$HASH.ts"></script>
<script src="app.js" type="text/typescript"> (OR CODE WITH NEWLINES HERE) </script>
</head>
PLAN
+ read t348repo folder from package.json
+ try repoPath, then ~/.t348repo/v1, then hash-store
+ cache in ~/.t348repo/v1 (implicit)
- and t348repo-folder (explicit)
+ t348pack subcommand (publishes normalized to './t0aaa1bbb2.js')
+ pack to ~/.t348repo/v1/t0aaa1bbb2.js
+ pack to hash-store
- config USE_HASH_STORE, USE_MACHINE, T348_GLOBAL_REPO etc
- pack from browser
+ boot from browser
- fix import '" regexes
- redesign so .ts browser import won't require js>ts 404
*/
let isBrowser = !!(globalThis.window && globalThis.document);
let importedModules; // don't access directly, use imports()
let importStarted;
function imports(){
if(!importedModules){throw new Error('performNodeImports() must be called first')}
return importedModules;
}
function findBrowserEnv(){
let goodName = name => name.substring(5).toUpperCase().replace('-','_')
let selfTags = document.querySelectorAll('script[type="module"][src*="t348"]');
if(selfTags.length!==1){throw new Error(`T348: Expected exactly one script tag with type="module" src='...t348...' but found ${selfTags.length}`);}
let moduleAttrs = [...selfTags[0].attributes].filter(x=>x.name.startsWith('data-')).map(x=>[goodName(x.name),x.value]);
let storageAttrs = Object.entries(localStorage).filter(x=>x[0].match(/^t348[-_].+/i)).map(x=>[goodName(x[0]),x[1]]);
return Object.fromEntries([...moduleAttrs,...storageAttrs]);
}
async function performNodeImports(){
//console.log({performNodeImports:true})
importStarted=true;
//console.warn({T348:1,isBrowser,performNodeImports:!!importedModules}) // direct log as conSole is still dummy at this point
let modules;
if(isBrowser){
let scriptTags = document.querySelectorAll('script[type="text/typescript"]');
if(scriptTags.length!==1){throw new Error(`T348: Expected exactly one script tag with type="text/typescript" but found ${scriptTags.length}`);}
let appEntryPoint = scriptTags[0].src || scriptTags[0].innerHTML;
modules = ({
env:{ /* add overrides here if you fancy */
'IS_BROWSER':'1',
...findBrowserEnv(),
},
fs:{
readFileSync:(path) => {let e = new Error('no files exist in the browser: '+path); e.code = 'ENOENT';throw e;},
writeFileSync:(path,data) => {xlog({writeFileSync:path,ignored:1})},
},
argv:['browser',appEntryPoint,'t348run'],
})
}else {
let {get: secureGet, request: secureRequest} = await import('https');
let {get} = await import('http');
let fs = await import('fs');
let path = await import('path');
let {homedir} = await import('os');
modules = ({
get,
secureGet,
secureRequest,
fs,
path,
homedir,
env:globalThis.process?.env || {},
argv:globalThis.process?.argv || [],
});
}
let {TEST, DEBUG, VERBOSE, TRACE} = modules.env;
if (TEST || DEBUG || VERBOSE || TRACE) {conSole = console}
log({t348:'done imports',argv:modules.argv}) // todo remove this
importedModules = modules;
return modules;
}
let isT348spec = (url) => url.startsWith('https://') || url.startsWith('http://127.0.0.1') || h48FromUrl(url);
// logger
let id = x => x;
let conSole = {log: id};
let xlog = id; // one-letter disable
// log is enabled when modules are imported, so we don't access `process` global here.
let log = (...args) => {
conSole.log('T348', ...args);
return id;
}
// NODE LOADER API
let nodeNativeSpecifierRegex = /^[a-z0-9/-]+$/
let redirected = {}
function processResolveError(e, specifier, parentURL) {
// log({defaultResolveError: e,specifier,parentURL})
// try to replace .js with .ts
if (e.code !== 'ERR_MODULE_NOT_FOUND' || !specifier.match(/^\.|\.js$/)) {
log({defaultResolveError: e,specifier,parentURL})
throw e
}
// console.log({specifier,parentURL});
// attempt our own resolution
let urlObject = parentURL ? new URL(specifier, parentURL) : new URL(specifier);
let url = urlObject.href.replace(/(\.js)?$/, '.ts')
if (!redirected[url]) {log({redirectToTypeScript: url}); redirected[url] = true;}
return ({url})
}
// noinspection JSUnusedGlobalSymbols
export function resolve(specifier, context, defaultResolve) {
log({resolve:specifier});
const {parentURL = null} = context;
// Normally Node.js would error on specifiers starting with 'https://', so
// this hook intercepts them and converts them into absolute URLs to be
// passed along to the hooks below.
if (isT348spec(specifier)) {
let url = h48FromUrl(specifier)?buildGlobalUrl(h48FromUrl(specifier)):specifier;
return log({t348Direct: url})({url, shortCircuit:true});
}
if (parentURL && isT348spec(parentURL) && !specifier.match(nodeNativeSpecifierRegex)) {
log({specifier,parentURL,willCombine:true})
let url = new URL(specifier, parentURL).href
return log({t348Parent: url})({url, shortCircuit:true})
}
log({defaultResolve: specifier})
try {
let drr= defaultResolve(specifier, context, defaultResolve)
if(drr.then){
return drr.then(x=>x,e=>processResolveError(e,specifier,parentURL))
}else {
return drr
}
}catch(e){
return processResolveError(e, specifier, parentURL);
}
}
let importInProgress;
// noinspection JSUnusedGlobalSymbols
export function load(url, context, defaultLoad) {
//console.log({load:url});
// hits when loader is operational
if(!!importedModules){return loadImpl(url, context, defaultLoad)}
if(url.startsWith('node:')) {
//console.log({nodeDefaultLoad:url});
return defaultLoad(url, context, defaultLoad)
}
// if(!importInProgress){ // first hit
// importInProgress = performNodeImports();
// }
// otherwise
return importInProgress.then(()=>loadImpl(url, context, defaultLoad))
}
let _transpiler;
function getTranspiler(){
if(!_transpiler) {
let {env} = imports();
let {DISABLE_SUCRASE} = env;
_transpiler = DISABLE_SUCRASE ? id : (code, originalUrl) => `${transform(code, {
transforms: ["typescript"],
filePath: originalUrl,
disableESTransforms: true
}).code}
//# sourceURL=${originalUrl}
//# sourceURL=${originalUrl}`;
// one of them will get removed by the loader, second is at the end so line numbers match
// todo keep file paths where the blobs were originally loaded from, if available
}
return _transpiler;
}
export function loadImpl(url, context, defaultLoad) {
log({loadImpl:url});
let {fs} = imports();
let transpiler = getTranspiler();
if (!isT348spec(url) && !isBrowser) { // AND IF NODE ONLY
if(url.endsWith('.ts')){
let filePath = url.replace('file://',''); let code;
log({url,filePath, willTranspile:true});
try {
code = fs.readFileSync(filePath).toString() // force modules lol
} catch (e) {
if(e.code==='ENOENT'){
code = fs.readFileSync(filePath.replace(/\.js$/,'.ts')).toString() // force modules lol
}else{
throw e;
}
}
return ({format:'module', source: transpiler(code, url), shortCircuit: true})
}else {
log({defaultLoad: url});
return defaultLoad(url, context, defaultLoad)
}
}
// note we get here only if not h348. need to refactor this out
let hash = h48FromUrl(url);
if (hash) {return loadAndMaybeCache(hash, transpiler)}
log({t348UrlFetch: url})
// NOTE: cannot check without hash, maybe log warning? assumes ESM
return miniGetJsTs(url).then(code => ({format: 'module', source: transpiler(code, url), shortCircuit:true}))
}
// todo real ugly hack, need to redesign so we don't do 2x the requests
async function miniGetJsTs(url){
try {
return await miniGet(url);
}catch(e){
if(e.code==='ENOENT' && url.endsWith('.js')){
return await miniGet(url.replace(/\.js$/,'.ts'))
}else{
throw e;
}
}
}
// END NODE API
const fc = path => imports().fs.readFileSync(path).toString('utf-8');
let packageJsonData;
function packageJson() {
// todo search starting from jsPath
if (!packageJsonData) {packageJsonData = JSON.parse(fc('package.json'))}
return packageJsonData
}
let t348MetaRegex = /^\s*\/\*\s+t348meta:\s+({.*})\s+\*\/\s*$/
let t348MetaPlaceholder = "/* t348meta: $JSON */"
// PACK FUNCTION
export async function packModule(argv) {
let {fs,path}=imports();
// normalize module, put it to t348repo
let [node, index, arg0pack, jsPath] = argv; // prefix and suffix so that idea imports work
// let suffix = '.js'; if(jsPath.endsWith('.ts')) {suffix = '.ts'}
// TODO: hash request is without suffix but repo stores files with suffix > either make everything .ts or not.
let [hash, normalized] = normalizeModuleAndHash(fc(jsPath), './t0', '.js');
// insert source path + date... oops this means normalized must skip comments like these
// /* t348meta: {"name":file.js "date":"2020-01-01"} */ to be replaced with /* t348meta: {} */
let name = path.basename(jsPath);
let date = new Date().toISOString()
let all = [t348MetaPlaceholder.replace('$JSON', JSON.stringify({hash, name, date})), normalized].join('\n')
let pathInRepo;
try{
pathInRepo = repoPath(hash)
}catch (e){
if(e.code==='ENOENT'){console.warn({noPackageJsonFound:1})}else{throw e}
}
if(pathInRepo) { fs.writeFileSync(pathInRepo, all) }
fs.writeFileSync(machineRepoPath(hash), all)
await postT227HashStore(hash, all);
let exports = detectExports(all).join(', ');
console.info({
jsPath, pathInRepo, hash,
import: pathInRepo? `import {${exports}} from '${pathInRepo}'` : undefined,
global: `import {${exports}} from '${buildGlobalUrl(hash)}'`
})
}
function detectExports(source) {
// https://developer.mozilla.org/en-US/docs/web/javascript/reference/statements/export
// return list of exports, ignore default export and export {}
return [...source.matchAll(/export\s+(?:let|const|function|class)\s+(\w+)/g)].map(x=>x[1]);
}
// BROWSER LOADER
async function t348run(){
let {argv}=imports();
let [browser, index, arg0run] = argv;
log({t348run:index});
let session = {
getBlob: async (session, id)=>{
log({getBlob:id});
// TODO implement this lol
//nyi('getBlob');
let {format,source} =await loadImpl(id, null, (id, ctx, _) => err('no defaultLoad in the browser for id='+id+' ctx='+ctx))
return source;
}
} // todo
// fetch and transpile
let convertedObjectUrl = await reallyLoadIntoBlobURL(session, index)
// run
return import(convertedObjectUrl); // it should be sufficient to trigger import of the index module
// nope sadly we can't rely on dynamic import as it won't fire our hooks.
// and we must remap blobs after sucrase processing.
}
// copied from t352
async function entryPoint(argv) {
let [node, index, arg0] = argv;
if (!(arg0+'').startsWith("t348")){return}
let commands = [];
log({arg0})
let cc = (command, fn) => check(arg0, commands, command, fn);
if (cc("t348pack", packModule)) {return}
if(cc("t348run", t348run)) {return}
if (arg0) {console.error({unknownCommand: arg0, allCommands: commands})}
}
// copied from t352
function check(arg, commands, command, fn) {
let {argv}=imports();
if (arg === command) {fn(argv);return true;}
commands.push(command);
return false
}
function repoPath(hash) {
// noinspection JSUnresolvedVariable
return (packageJson()?.t348?.repo || "./t348repo/t0$HASH.js").replace('$HASH', hash);
}
function machineRepoPath(hash) {
let{path,homedir}=imports();
if(!path){xlog({machineRepoPath:'no path module'});return}
let machinePath = path.resolve(homedir(), ".t348repo/v1/t0$HASH.js").replace('$HASH', hash)
return log({machinePath})(machinePath)
}
function buildGlobalUrl(hash) {
// data-global-repo="./t348repo/t0$HASH.ts"
// noinspection JSUnresolvedVariable
let {T348_GLOBAL_REPO, GLOBAL_REPO}=imports().env;
let url = T348_GLOBAL_REPO || GLOBAL_REPO || "t348:t0$HASH.js"; // was "https://localhost/t0$HASH.js" but that was causing ERR_NETWORK_IMPORT_DISALLOWED
return url.replace('$HASH', hash)
}
async function postT227HashStore(hash, data) {
let{secureRequest,env}=imports();
// something like https://website.com/path/?version=1&mime=text/javascript&source=t348publish&name=t0$HASH.js
// noinspection JSUnresolvedVariable
let {T348_GLOBAL_REPO_PUBLISH, GLOBAL_REPO_PUBLISH}=imports().env;
let url = (T348_GLOBAL_REPO_PUBLISH||GLOBAL_REPO_PUBLISH||"").replace('$HASH', hash);
if(!url){console.error({noPublishUrl:'please set T348_GLOBAL_REPO_PUBLISH or GLOBAL_REPO_PUBLISH'})}
// accessible at https://website.com/path/t0SfTi5Wrr.js
const options = {
method: 'POST',
headers: {'Content-Length': Buffer.byteLength(data), 'Content-Type': 'text/javascript'}
};
return new Promise((resolve, reject) => {
const req = secureRequest(url, options, (res) => {
log(`STATUS: ${res.statusCode}`);
let data = {c: ''};
res.setEncoding('utf8');
res.on('data', (chunk) => { log(`BODY: ${chunk}`); data.c += chunk});
res.on('end', () => resolve(log('request completed')(data.c)));
}).on('error', reject);
req.write(data);
req.end();
})
}
async function loadAndMaybeCache(hash, transpiler) {
let{fs,env}=imports();
let {IGNORE_HASHES,T348CACHE}=env;
let localSourceCode = loadFromRepoSync(hash);
let fetchRequired = false;
if (localSourceCode === false) {
let globalUrl = buildGlobalUrl(hash);
localSourceCode = await miniGet(log({globalUrl})(globalUrl));
fetchRequired = true
}
let [fileHash, normalized, nameHint] = normalizeModuleAndHash(localSourceCode, 't0')
if (fileHash !== hash && !IGNORE_HASHES) { throw new Error(`repo damaged for hash: ${hash} => ${fileHash} DATA: ${normalized}`)}
// localSourceCode has meta, normalized has not. keep it.
if (fetchRequired) {fs.writeFileSync(machineRepoPath(hash), localSourceCode);}
if (T348CACHE) {
log({t348cache:hash})
fs.writeFileSync(repoPath(hash), localSourceCode)}
let nameHintSuffix = nameHint ? `#${nameHint}` : ''
let byHash = ({format: 'module', source: transpiler(normalized, 't0:'+hash+nameHintSuffix), shortCircuit:true});/*log*/
id({byHash});
return byHash;
}
function miniGet(url) {
let{secureGet,get}=imports();
if(!secureGet){
return fetch(url).then(response => response.status<300? response.text():err(`cannot fetch: ${response.status} ${response.statusText}`, {code:response.status===404?'ENOENT':'EIO'}))
}
return new Promise((resolve, reject) => {
let getter = url.startsWith('https://') ? secureGet : get;
getter(url, (res) => {
let data = {c: ''}; res.setEncoding('utf8');
res.on('data', (chunk) => data.c += chunk);
res.on('end', () => resolve(data.c));
}).on('error', (err) => reject(err));
})
}
function loadFromRepoSync(hash) {
try {return fc(repoPath(hash))} catch (e) {if (e.code !== 'ENOENT') {throw e}}
try {return fc(machineRepoPath(hash))} catch (e) {if (e.code !== 'ENOENT') {throw e}}
return false
}
export function normalizeModuleAndHash(codeString, prefix = '', suffix = '') {
let lines = codeString.split('\n')
let normalized = lines.map(x => normalizeImportLine(x)).filter(x => x !== false).join('\n');
let hash = h48(normalized)
if (prefix + suffix) {
normalized = lines.map(x => normalizeImportLine(x, prefix, suffix)).filter(x => x !== false).join('\n')
}
let nameHint = lines.find(x => x.match(t348MetaRegex))?.match(t348MetaRegex)?.[1];
if(nameHint){
try {
nameHint = JSON.parse(nameHint).name // todo maybe date too
}catch (e) {
nameHint = 'parseError'
}
}
// console.log({nameHint})
return [hash, normalized, nameHint]
}
function normalizeImportLine(line, prefix = '', suffix = '') {
// to be used only in normalizeModuleAndHash. false = line should be ignored
if (line.match(t348MetaRegex)) {return false}
let specifier = line.match(importRegex)?.[1];
if (!specifier) {return line}
let specHash = h48FromUrl(specifier);
if (!specHash) {return line}
return line.replace(specifier, prefix + specHash + suffix)
}
// import {c
// } from 'http://127.0.0.1:7348/c.js'; // so track from 'STRING'
// it's fine to replace commented out imports here
let importRegex = /\bfrom\s+['"]([^'"]+)['"]/;
// like bech32 but base64$_ because I want 6*8, not 5*10. two-byte prefix is passable.
let h48Regex = /.*\bt0([a-zA-Z0-9$_]{8})(\.m?js)?\b/ // remove .* to match first
export const h48FromUrl = url => url.match(h48Regex)?.[1];
// BEGIN stuff copied from t352 module-loader, discover-dependencies.js
export function nyi(message = 'nyi') {
throw new Error(message)
}
export function err(message = 'error', props = {}) {
let err = new Error(message);
for(let k in props){err[k]=props[k]}
throw err;
}
// holy shit, our id should be absolute if we resolve paths not just ids.
export async function discoverDependencies(session, id, depth) {
let sourceCode = await loadOriginalModuleSource(session, id)
// todo proper parsing later, now let's match from 'blob:BlobId' and from '/path/module.js'
// (?:^|\n)(?:(?!\/\/).)* means "does not contain // since start of file or line"
let importRegex = /(?:^|\n)(?:(?!\/\/).)*?from ['"]([^'"\n\s]+)['"]/g // todo this will match from 'a"
let importRegex2 = /(?:^|\n)(?:(?!\/\/).)*?from ['"]([^'"\n\s]+)['"]/
let importList = sourceCode.match(importRegex) || []
log({id, importList})
let map = {}
for (let importKey of importList) {
let detailMatch = importKey.match(importRegex2)
log({detailMatch:detailMatch?.[1]})
let importKey2 = detailMatch[1];
// for each one, find true url
map[importKey2] = await reallyLoadIntoBlobURL(session, importKey2, [...depth, id])
}
log({sourceCode, map})
let remappedCode = sourceCode
for (let importKey in map) {
remappedCode = remappedCode.replaceAll(importKey, map[importKey])
// todo add comments on what was replaced
}
return [sourceCode, remappedCode, map];
}
// hash to blob url
let moduleToUrl = {}
// hash to source
let originalSources = {}
// debug only
let remappedSources = {}
export async function loadOriginalModuleSource(session, id) {
if (!originalSources[id]) {
originalSources[id] = await session.getBlob(session, id)
}
return originalSources[id]
}
// todo: remove them?
let staticRemaps = {
'mini-react': '/react/mini-html.js',
'widget-frame': '/src/ui/widget-frame.js',
'use-async-value': '/src/ui/use-async-value.js',
'connected': '/src/vm/connected.js',
}
// holy crap, we're going to mix modules from different sessions together.
// but if blobs are content-keyed then it's okay!
export async function reallyLoadIntoBlobURL(session, source, depth = []) {
if (staticRemaps[source]) {
source = staticRemaps[source]
}
if (source.length > 100 || source.indexOf('\n') !== -1) {
log("assuming it's direct source code. still need to transpile.")
let id = h48(source)
log({directSourceId:id});
let fullId = new URL(id,document.location.href).href;
originalSources[fullId] = getTranspiler()(source, fullId);
return reallyLoadIntoBlobURL(session, fullId, [...depth, fullId])
}
// somewhere here we need to absolutize the url.
let sourceHash = h48FromUrl(source)
if(sourceHash){ // all hashes are equal regardless of baseURI
source = new URL(buildGlobalUrl(sourceHash),document.location.href).href;
log({sourceHash, source})
}else {
let prev = (depth.length > 1) ? depth[depth.length - 1] : document.location.href;
let absolute = new URL(source, prev).href
log({source, prev, absolute, depth});
source = absolute;
}
if (moduleToUrl[source]) {
log({returningExisting: source}); return moduleToUrl[source]
}
if (source.match(/^\/.*\.js$/)) { // it's our existing module, don't transcode
// todo really?
log({skipTranscode: source});
moduleToUrl[source] = document.location.href + source.slice(1);
return moduleToUrl[source];
}
log({reallyLoadIntoBlobURL: source, depth})
if (depth.length > 90) { // 100 is collapsed by devtools
err('dependency chain too deep')
}
// if already loaded - return
// otherwise, go depth-first.
let [code, remapped, remaps] = await discoverDependencies(session, source, depth)
log({code, remapped, remaps})
log(remapped);
remappedSources[source] = remapped;
// build
// todo maybe inject logger on load event?
moduleToUrl[source] = URL.createObjectURL(new Blob([remapped], {type: 'application/javascript'}))
// return URL!
return moduleToUrl[source]
}
//window.debugReallyLoadIntoBlobURL = reallyLoadIntoBlobURL;
//window.debugLoaderTables = {moduleToUrl, originalSources, remappedSources}
// END stuff copied from t352 module-loader, discover-dependencies.js
// todo: maybe re-do h48 via node/web crypto? or keep inline?
// copying stuff from t352
export function h48(v) {
// 48 is 6 bytes or 8 bytes of base64, 50% on 16M items is fine.
let h = sha256(v).slice(0, 6);
// $_ is variable-name-safe, -_ is url-safe, but I don't like it
// $ also breaks word-select in browsers though... abc$def
return u8b64(h).replaceAll('+', '$').replaceAll('/', '_')
}
// h48 deps
export const u8b64 = uint8array => {
const output = []; // note maybe rewrite this, not utf8 etc
for (let i = 0, {length} = uint8array; i < length; i++) {
output.push(String.fromCharCode(uint8array[i]));
}
return btoa(output.join(''));
}
// Uint8Array.from(arrayLike, mapFn, thisArg)
export const b64u8 = chars => Uint8Array.from(atob(chars), c => c.charCodeAt(0));
// lib/noble/sha256.js imports below
//import {SHA2} from './_sha2.js';
// lib/noble/_sha2.js imports below
//import {Hash, createView, toBytes} from './utils.js';
export const isLE = new Uint8Array(new Uint32Array([0x11223344]).buffer)[0] === 0x44;
// There is almost no big endian hardware, but js typed arrays uses platform specific endianness.
// So, just to be sure not to corrupt anything.
if (!isLE) {throw new Error('Non little-endian hardware is not supported')}
// For runtime check if class implements interface
export class Hash {
// Safe version that clones internal state
clone() { // noinspection JSUnresolvedFunction
return this._cloneInto();}
}
// Cast array to view
export const createView = (arr) => new DataView(arr.buffer, arr.byteOffset, arr.byteLength);
export function toBytes(data) {
if (typeof data === 'string') {data = new TextEncoder().encode(data);}
if (!(data instanceof Uint8Array)) {
throw new TypeError(`Expected input type is Uint8Array (got ${typeof data}) `);
}
return data;
}
// Polyfill for Safari 14
function setBigUint64(view, byteOffset, value, isLE) {
if (typeof view.setBigUint64 === 'function') {
return view.setBigUint64(byteOffset, value, isLE);
}
const _32n = BigInt(32);
const _u32_max = BigInt(0xffffffff);
const wh = Number((value >> _32n) & _u32_max);
const wl = Number(value & _u32_max);
const h = isLE ? 4 : 0;
const l = isLE ? 0 : 4;
view.setUint32(byteOffset + h, wh, isLE);
view.setUint32(byteOffset + l, wl, isLE);
}
// Base SHA2 class (RFC 6234)
export class SHA2 extends Hash {
constructor(blockLen, outputLen, padOffset, isLE) {
super();
this.blockLen = blockLen;
this.outputLen = outputLen;
this.padOffset = padOffset;
this.isLE = isLE;
this.finished = false;
this.length = 0;
this.pos = 0;
this.destroyed = false;
this.buffer = new Uint8Array(blockLen);
this.view = createView(this.buffer);
}
update(data) {
if (this.destroyed) {throw new Error('instance is destroyed');}
const {view, buffer, blockLen, finished} = this;
if (finished) {throw new Error('digest() was already called');}
data = toBytes(data);
const len = data.length;
for (let pos = 0; pos < len;) {
const take = Math.min(blockLen - this.pos, len - pos);
// Fast path: we have at least one block in input, cast it to view and process
if (take === blockLen) {
const dataView = createView(data);
for (; blockLen <= len - pos; pos += blockLen) this.process(dataView, pos);
continue;
}
buffer.set(data.subarray(pos, pos + take), this.pos);
this.pos += take;
pos += take;
if (this.pos === blockLen) {
this.process(view, 0);
this.pos = 0;
}
}
this.length += data.length;
this.roundClean();
return this;
}
digestInto(out) {
if (this.destroyed) {throw new Error('instance is destroyed');}
if (!(out instanceof Uint8Array) || out.length < this.outputLen) {
throw new Error('_Sha2: Invalid output buffer');
}
if (this.finished) {throw new Error('digest() was already called');}
this.finished = true;
// Padding
// We can avoid allocation of buffer for padding completely if it
// was previously not allocated here. But it won't change performance.
const {buffer, view, blockLen, isLE} = this;
let {pos} = this;
// append the bit '1' to the message
buffer[pos++] = 0b10000000;
this.buffer.subarray(pos).fill(0);
// we have less than padOffset left in buffer, so we cannot put length in current block, need process it and pad again
if (this.padOffset > blockLen - pos) {
this.process(view, 0);
pos = 0;
}
// Pad until full block byte with zeros
for (let i = pos; i < blockLen; i++) buffer[i] = 0;
// NOTE: sha512 requires length to be 128bit integer, but length in JS will overflow before that
// You need to write around 2 exabytes (u64_max / 8 / (1024**6)) for this to happen.
// So we just write lowest 64bit of that value.
setBigUint64(view, blockLen - 8, BigInt(this.length * 8), isLE);
this.process(view, 0);
const oview = createView(out);
this.get().forEach((v, i) => oview.setUint32(4 * i, v, isLE));
}
digest() {
const {buffer, outputLen} = this;
this.digestInto(buffer);
const res = buffer.slice(0, outputLen);
this.destroy();
return res;
}
_cloneInto(to) {
to || (to = new this.constructor());
to.set(...this.get());
const {blockLen, buffer, length, finished, destroyed, pos} = this;
to.length = length;
to.pos = pos;
to.finished = finished;
to.destroyed = destroyed;
if (length % blockLen) {to.buffer.set(buffer);}
return to;
}
}
//import {rotr, wrapConstructor} from './utils.js';
// The rotate right (circular right shift) operation for uint32
export const rotr = (word, shift) => (word << (32 - shift)) | (word >>> shift);
export function wrapConstructor(hashConstructor) {
const hashC = (message) => hashConstructor().update(toBytes(message)).digest();
const tmp = hashConstructor();
hashC.outputLen = tmp.outputLen;
hashC.blockLen = tmp.blockLen;
hashC.create = () => hashConstructor();
hashC.init = hashC.create;
return hashC;
}
// lib/noble/sha256.js imports end, body below
// Choice: a ? b : c
const Chi = (a, b, c) => (a & b) ^ (~a & c);
// Majority function, true if any two inpust is true
const Maj = (a, b, c) => (a & b) ^ (a & c) ^ (b & c);
// Round constants:
// first 32 bits of the fractional parts of the cube roots of the first 64 primes 2..311)
// prettier-ignore
const SHA256_K = new Uint32Array([0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4,
0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74,
0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa,
0x5cb0a9dc, 0x76f988da, 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3,
0xd5a79147, 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb,
0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819,
0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa,
0xa4506ceb, 0xbef9a3f7, 0xc67178f2]);
// Initial state (first 32 bits of the fractional parts of the square roots of the first 8 primes 2..19):
// prettier-ignore
const IV = new Uint32Array([0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab,
0x5be0cd19]);
// Temporary buffer, not used to store anything between runs
// Named this way because it matches specification.
const SHA256_W = new Uint32Array(64);
class SHA256 extends SHA2 {
constructor() {
super(64, 32, 8, false);
// We cannot use array here since array allows indexing by variable
// which means optimizer/compiler cannot use registers.
this.A = IV[0] | 0;
this.B = IV[1] | 0;
this.C = IV[2] | 0;
this.D = IV[3] | 0;
this.E = IV[4] | 0;
this.F = IV[5] | 0;
this.G = IV[6] | 0;
this.H = IV[7] | 0;
}
get() {
const {A, B, C, D, E, F, G, H} = this;
return [A, B, C, D, E, F, G, H];
}
// prettier-ignore
set(A, B, C, D, E, F, G, H) {
this.A = A | 0;
this.B = B | 0;
this.C = C | 0;
this.D = D | 0;
this.E = E | 0;
this.F = F | 0;
this.G = G | 0;
this.H = H | 0;
}
process(view, offset) {
// Extend the first 16 words into the remaining 48 words w[16..63] of the message schedule array
for (let i = 0; i < 16; i++, offset += 4) SHA256_W[i] = view.getUint32(offset, false);
for (let i = 16; i < 64; i++) {
const W15 = SHA256_W[i - 15];
const W2 = SHA256_W[i - 2];
const s0 = rotr(W15, 7) ^ rotr(W15, 18) ^ (W15 >>> 3);
const s1 = rotr(W2, 17) ^ rotr(W2, 19) ^ (W2 >>> 10);
SHA256_W[i] = (s1 + SHA256_W[i - 7] + s0 + SHA256_W[i - 16]) | 0;
}
// Compression function main loop, 64 rounds
let {A, B, C, D, E, F, G, H} = this;
for (let i = 0; i < 64; i++) {
const sigma1 = rotr(E, 6) ^ rotr(E, 11) ^ rotr(E, 25);
const T1 = (H + sigma1 + Chi(E, F, G) + SHA256_K[i] + SHA256_W[i]) | 0;
const sigma0 = rotr(A, 2) ^ rotr(A, 13) ^ rotr(A, 22);
const T2 = (sigma0 + Maj(A, B, C)) | 0;
H = G;
G = F;
F = E;
E = (D + T1) | 0;
D = C;
C = B;
B = A;
A = (T1 + T2) | 0;
}
// Add the compressed chunk to the current hash value
A = (A + this.A) | 0;
B = (B + this.B) | 0;
C = (C + this.C) | 0;
D = (D + this.D) | 0;
E = (E + this.E) | 0;
F = (F + this.F) | 0;
G = (G + this.G) | 0;
H = (H + this.H) | 0;
this.set(A, B, C, D, E, F, G, H);
}
roundClean() {SHA256_W.fill(0);}
destroy() {
this.set(0, 0, 0, 0, 0, 0, 0, 0);
this.buffer.fill(0);
}
}
export const sha256 = wrapConstructor(() => new SHA256());
// BEGIN INLINE [email protected]
const transform=(()=>{
const HELPERS = {
interopRequireWildcard: `
function interopRequireWildcard(obj) {
if (obj && obj.__esModule) {
return obj;
} else {
var newObj = {};
if (obj != null) {
for (var key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key)) {
newObj[key] = obj[key];
}
}
}
newObj.default = obj;
return newObj;
}
}
`,
interopRequireDefault: `
function interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : { default: obj };
}
`,
createNamedExportFrom: `
function createNamedExportFrom(obj, localName, importedName) {
Object.defineProperty(exports, localName, {enumerable: true, get: () => obj[importedName]});
}
`,
// Note that TypeScript and Babel do this differently; TypeScript does a simple existence
// check in the exports object and does a plain assignment, whereas Babel uses
// defineProperty and builds an object of explicitly-exported names so that star exports can
// always take lower precedence. For now, we do the easier TypeScript thing.
createStarExport: `
function createStarExport(obj) {
Object.keys(obj)
.filter((key) => key !== "default" && key !== "__esModule")
.forEach((key) => {
if (exports.hasOwnProperty(key)) {
return;
}
Object.defineProperty(exports, key, {enumerable: true, get: () => obj[key]});
});
}
`,
nullishCoalesce: `
function nullishCoalesce(lhs, rhsFn) {
if (lhs != null) {
return lhs;
} else {
return rhsFn();
}
}
`,
asyncNullishCoalesce: `
async function asyncNullishCoalesce(lhs, rhsFn) {
if (lhs != null) {
return lhs;
} else {
return await rhsFn();
}
}
`,
optionalChain: `
function optionalChain(ops) {
let lastAccessLHS = undefined;
let value = ops[0];
let i = 1;
while (i < ops.length) {
const op = ops[i];
const fn = ops[i + 1];
i += 2;
if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) {
return undefined;
}
if (op === 'access' || op === 'optionalAccess') {
lastAccessLHS = value;
value = fn(value);
} else if (op === 'call' || op === 'optionalCall') {
value = fn((...args) => value.call(lastAccessLHS, ...args));
lastAccessLHS = undefined;
}
}
return value;
}
`,
asyncOptionalChain: `
async function asyncOptionalChain(ops) {
let lastAccessLHS = undefined;
let value = ops[0];
let i = 1;
while (i < ops.length) {
const op = ops[i];
const fn = ops[i + 1];
i += 2;
if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) {
return undefined;
}
if (op === 'access' || op === 'optionalAccess') {
lastAccessLHS = value;
value = await fn(value);
} else if (op === 'call' || op === 'optionalCall') {