add ONS resolve for new ONS and loading on message overlay
Audric Ackermann
4 years ago
parent
61b04929f0
commit
d0c1a2bf3a
@ -1,121 +0,0 @@
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/* eslint-disable class-methods-use-this */
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/* global window, Buffer, StringView, dcodeIO */
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class LokiSnodeAPI {
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// ************** NOTE ***************
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// This is not used by anything yet,
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// but should be. Do not remove!!!
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// ***********************************
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async getLnsMapping(lnsName, timeout) {
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// Returns { pubkey, error }
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// pubkey is
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// undefined when unconfirmed or no mapping found
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// string when found
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// timeout parameter optional (ms)
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// How many nodes to fetch data from?
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const numRequests = 5;
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// How many nodes must have the same response value?
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const numRequiredConfirms = 3;
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let ciphertextHex;
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let pubkey;
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let error;
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const _ = window.Lodash;
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const input = Buffer.from(lnsName);
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const output = await window.blake2b(input);
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const nameHash = dcodeIO.ByteBuffer.wrap(output).toString('base64');
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// Timeouts
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const maxTimeoutVal = 2 ** 31 - 1;
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const timeoutPromise = () =>
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new Promise((_resolve, reject) => setTimeout(() => reject(), timeout || maxTimeoutVal));
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// Get nodes capable of doing LNS
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const lnsNodes = await window.SnodePool.getNodesMinVersion(
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window.CONSTANTS.LNS_CAPABLE_NODES_VERSION
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);
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// Enough nodes?
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if (lnsNodes.length < numRequiredConfirms) {
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error = { lnsTooFewNodes: window.i18n('lnsTooFewNodes') };
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return { pubkey, error };
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}
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const confirmedNodes = [];
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// Promise is only resolved when a consensus is found
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let cipherResolve;
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const cipherPromise = () =>
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new Promise(resolve => {
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cipherResolve = resolve;
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});
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const decryptHex = async cipherHex => {
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const ciphertext = new Uint8Array(StringView.hexToArrayBuffer(cipherHex));
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const res = await window.decryptLnsEntry(lnsName, ciphertext);
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const publicKey = StringView.arrayBufferToHex(res);
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return publicKey;
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};
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const fetchFromNode = async node => {
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const res = await window.NewSnodeAPI._requestLnsMapping(node, nameHash);
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// Do validation
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if (res && res.result && res.result.status === 'OK') {
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const hasMapping = res.result.entries && res.result.entries.length > 0;
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const resValue = hasMapping ? res.result.entries[0].encrypted_value : null;
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confirmedNodes.push(resValue);
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if (confirmedNodes.length >= numRequiredConfirms) {
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if (ciphertextHex) {
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// Result already found, dont worry
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return;
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}
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const [winner, count] = _.maxBy(_.entries(_.countBy(confirmedNodes)), x => x[1]);
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if (count >= numRequiredConfirms) {
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ciphertextHex = winner === String(null) ? null : winner;
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// null represents no LNS mapping
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if (ciphertextHex === null) {
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error = { lnsMappingNotFound: window.i18n('lnsMappingNotFound') };
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}
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cipherResolve({ ciphertextHex });
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}
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}
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}
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};
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const nodes = lnsNodes.splice(0, numRequests);
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// Start fetching from nodes
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nodes.forEach(node => fetchFromNode(node));
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// Timeouts (optional parameter)
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// Wait for cipher to be found; race against timeout
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// eslint-disable-next-line more/no-then
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await Promise.race([cipherPromise, timeoutPromise].map(f => f()))
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.then(async () => {
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if (ciphertextHex !== null) {
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pubkey = await decryptHex(ciphertextHex);
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}
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})
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.catch(() => {
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error = { lnsLookupTimeout: window.i18n('lnsLookupTimeout') };
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});
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return { pubkey, error };
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}
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}
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module.exports = LokiSnodeAPI;
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@ -1,10 +0,0 @@
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interface Promise<T> {
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ignore(): void;
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}
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// Types also correspond to messages.json keys
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enum LnsLookupErrorType {
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lnsTooFewNodes,
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lnsLookupTimeout,
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lnsMappingNotFound,
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}
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