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@ -11,88 +11,257 @@ const snodeHttpsAgent = new https.Agent({
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const endpointBase = '/storage_rpc/v1';
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// Request index for debugging
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let onionReqIdx = 0;
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const encryptForNode = async (node, payloadStr) => {
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const textEncoder = new TextEncoder();
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const plaintext = textEncoder.encode(payloadStr);
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return libloki.crypto.encryptForPubkey(node.pubkey_x25519, plaintext);
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};
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// Returns the actual ciphertext, symmetric key that will be used
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// for decryption, and an ephemeral_key to send to the next hop
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const encryptForDestination = async (node, payload) => {
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// Do we still need "headers"?
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const reqStr = JSON.stringify({ body: payload, headers: '' });
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const encryptForPubKey = async (pubKeyX25519hex, reqObj) => {
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const reqStr = JSON.stringify(reqObj);
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const textEncoder = new TextEncoder();
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const plaintext = textEncoder.encode(reqStr);
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return encryptForNode(node, reqStr);
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return libloki.crypto.encryptForPubkey(pubKeyX25519hex, plaintext);
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};
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// `ctx` holds info used by `node` to relay further
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const encryptForRelay = async (node, nextNode, ctx) => {
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const encryptForRelay = async (relayX25519hex, destination, ctx) => {
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// ctx contains: ciphertext, symmetricKey, ephemeralKey
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const payload = ctx.ciphertext;
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const reqJson = {
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if (!destination.host && !destination.destination) {
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log.warn(`loki_rpc::encryptForRelay - no destination`, destination);
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}
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const reqObj = {
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...destination,
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ciphertext: dcodeIO.ByteBuffer.wrap(payload).toString('base64'),
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ephemeral_key: StringView.arrayBufferToHex(ctx.ephemeralKey),
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destination: nextNode.pubkey_ed25519,
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};
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const reqStr = JSON.stringify(reqJson);
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return encryptForNode(node, reqStr);
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return encryptForPubKey(relayX25519hex, reqObj);
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};
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const BAD_PATH = 'bad_path';
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const makeGuardPayload = guardCtx => {
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const ciphertextBase64 = dcodeIO.ByteBuffer.wrap(
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guardCtx.ciphertext
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).toString('base64');
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// May return false BAD_PATH, indicating that we should try a new
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const sendOnionRequest = async (reqIdx, nodePath, targetNode, plaintext) => {
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const ctxes = [await encryptForDestination(targetNode, plaintext)];
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const guardPayloadObj = {
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ciphertext: ciphertextBase64,
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ephemeral_key: StringView.arrayBufferToHex(guardCtx.ephemeralKey),
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};
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return guardPayloadObj;
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};
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// we just need the targetNode.pubkey_ed25519 for the encryption
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// targetPubKey is ed25519 if snode is the target
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const makeOnionRequest = async (
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nodePath,
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destCtx,
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targetED25519Hex,
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finalRelayOptions = false,
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id = ''
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) => {
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const ctxes = [destCtx];
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// from (3) 2 to 0
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const firstPos = nodePath.length - 1;
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for (let i = firstPos; i > -1; i -= 1) {
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// this nodePath points to the previous (i + 1) context
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ctxes.push(
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let dest;
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const relayingToFinalDestination = i === 0; // if last position
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if (relayingToFinalDestination && finalRelayOptions) {
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dest = {
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host: finalRelayOptions.host,
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target: '/loki/v1/lsrpc',
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method: 'POST',
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};
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} else {
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// set x25519 if destination snode
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let pubkeyHex = targetED25519Hex; // relayingToFinalDestination
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// or ed25519 snode destination
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if (!relayingToFinalDestination) {
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pubkeyHex = nodePath[i + 1].pubkey_ed25519;
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if (!pubkeyHex) {
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log.error(
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`loki_rpc:::makeOnionRequest ${id} - no ed25519 for`,
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nodePath[i + 1],
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'path node',
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i + 1
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);
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}
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}
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// destination takes a hex key
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dest = {
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destination: pubkeyHex,
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};
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}
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try {
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// eslint-disable-next-line no-await-in-loop
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await encryptForRelay(
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nodePath[i],
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i === firstPos ? targetNode : nodePath[i + 1],
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const ctx = await encryptForRelay(
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nodePath[i].pubkey_x25519,
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dest,
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ctxes[ctxes.length - 1]
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)
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);
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);
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ctxes.push(ctx);
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} catch (e) {
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log.error(
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`loki_rpc:::makeOnionRequest ${id} - encryptForRelay failure`,
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e.code,
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e.message
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);
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throw e;
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}
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}
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const guardCtx = ctxes[ctxes.length - 1]; // last ctx
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const ciphertextBase64 = dcodeIO.ByteBuffer.wrap(
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guardCtx.ciphertext
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).toString('base64');
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const payloadObj = makeGuardPayload(guardCtx);
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const payload = {
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ciphertext: ciphertextBase64,
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ephemeral_key: StringView.arrayBufferToHex(guardCtx.ephemeralKey),
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};
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// all these requests should use AesGcm
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return payloadObj;
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};
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const fetchOptions = {
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// finalDestOptions is an object
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// FIXME: internally track reqIdx, not externally
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const sendOnionRequest = async (
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reqIdx,
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nodePath,
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destX25519Any,
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finalDestOptions,
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finalRelayOptions = false,
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lsrpcIdx
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) => {
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if (!destX25519Any) {
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log.error('loki_rpc::sendOnionRequest - no destX25519Any given');
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return {};
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}
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// loki-storage may need this to function correctly
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// but ADN calls will not always have a body
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/*
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if (!finalDestOptions.body) {
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finalDestOptions.body = '';
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}
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*/
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let id = '';
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if (lsrpcIdx !== undefined) {
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id += `${lsrpcIdx}=>`;
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}
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if (reqIdx !== undefined) {
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id += `${reqIdx}`;
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}
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// get destination pubkey in array buffer format
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let destX25519hex = destX25519Any;
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if (typeof destX25519hex !== 'string') {
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// convert AB to hex
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destX25519hex = StringView.arrayBufferToHex(destX25519Any);
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}
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// safely build destination
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let targetEd25519hex;
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if (finalDestOptions) {
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if (finalDestOptions.destination_ed25519_hex) {
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// snode destination
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targetEd25519hex = finalDestOptions.destination_ed25519_hex;
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// eslint-disable-next-line no-param-reassign
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delete finalDestOptions.destination_ed25519_hex;
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}
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// else it's lsrpc...
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} else {
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// eslint-disable-next-line no-param-reassign
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finalDestOptions = {};
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log.warn(`loki_rpc::sendOnionRequest ${id} - no finalDestOptions`);
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return {};
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}
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const options = finalDestOptions; // lint
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// do we need this?
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if (options.headers === undefined) {
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options.headers = '';
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}
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let destCtx;
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try {
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destCtx = await encryptForPubKey(destX25519hex, options);
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} catch (e) {
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log.error(
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`loki_rpc::sendOnionRequest ${id} - encryptForPubKey failure [`,
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e.code,
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e.message,
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'] destination X25519',
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destX25519hex.substr(0, 32),
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'...',
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destX25519hex.substr(32),
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'options',
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options
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);
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throw e;
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}
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const payloadObj = await makeOnionRequest(
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nodePath,
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destCtx,
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targetEd25519hex,
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finalRelayOptions,
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id
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);
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const guardFetchOptions = {
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method: 'POST',
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body: JSON.stringify(payload),
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body: JSON.stringify(payloadObj),
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// we are talking to a snode...
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agent: snodeHttpsAgent,
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};
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const url = `https://${nodePath[0].ip}:${nodePath[0].port}/onion_req`;
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// we only proxy to snodes...
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process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';
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const response = await nodeFetch(url, fetchOptions);
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process.env.NODE_TLS_REJECT_UNAUTHORIZED = '1';
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const guardUrl = `https://${nodePath[0].ip}:${nodePath[0].port}/onion_req`;
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const response = await nodeFetch(guardUrl, guardFetchOptions);
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return processOnionResponse(reqIdx, response, ctxes[0].symmetricKey, true);
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return processOnionResponse(reqIdx, response, destCtx.symmetricKey, true);
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};
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const sendOnionRequestSnodeDest = async (
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reqIdx,
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nodePath,
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targetNode,
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plaintext
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) =>
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sendOnionRequest(reqIdx, nodePath, targetNode.pubkey_x25519, {
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destination_ed25519_hex: targetNode.pubkey_ed25519,
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body: plaintext,
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});
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// need relay node's pubkey_x25519_hex
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// always the same target: /loki/v1/lsrpc
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const sendOnionRequestLsrpcDest = async (
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reqIdx,
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nodePath,
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destX25519Any,
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host,
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payloadObj,
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lsrpcIdx = 0
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) =>
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sendOnionRequest(
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reqIdx,
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nodePath,
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destX25519Any,
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payloadObj,
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{ host },
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lsrpcIdx
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);
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const BAD_PATH = 'bad_path';
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// Process a response as it arrives from `nodeFetch`, handling
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// http errors and attempting to decrypt the body with `sharedKey`
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const processOnionResponse = async (reqIdx, response, sharedKey, useAesGcm) => {
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// May return false BAD_PATH, indicating that we should try a new path.
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const processOnionResponse = async (
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reqIdx,
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response,
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sharedKey,
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useAesGcm,
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debug
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) => {
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// FIXME: 401/500 handling?
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// detect SNode is not ready (not in swarm; not done syncing)
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@ -115,16 +284,26 @@ const processOnionResponse = async (reqIdx, response, sharedKey, useAesGcm) => {
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if (response.status !== 200) {
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log.warn(
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`(${reqIdx}) [path] fetch unhandled error code: ${response.status}`
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`(${reqIdx}) [path] lokiRpc::processOnionResponse - fetch unhandled error code: ${
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response.status
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}`
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);
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return false;
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}
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const ciphertext = await response.text();
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if (!ciphertext) {
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log.warn(`(${reqIdx}) [path]: Target node return empty ciphertext`);
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log.warn(
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`(${reqIdx}) [path] lokiRpc::processOnionResponse - Target node return empty ciphertext`
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);
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return false;
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}
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if (debug) {
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log.debug(
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`(${reqIdx}) [path] lokiRpc::processOnionResponse - ciphertext`,
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ciphertext
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);
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}
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let plaintext;
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let ciphertextBuffer;
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@ -134,22 +313,52 @@ const processOnionResponse = async (reqIdx, response, sharedKey, useAesGcm) => {
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'base64'
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).toArrayBuffer();
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if (debug) {
|
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log.debug(
|
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`(${reqIdx}) [path] lokiRpc::processOnionResponse - ciphertextBuffer`,
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StringView.arrayBufferToHex(ciphertextBuffer),
|
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'useAesGcm',
|
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useAesGcm
|
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|
);
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}
|
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|
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const decryptFn = useAesGcm
|
|
|
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? window.libloki.crypto.DecryptGCM
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: window.libloki.crypto.DHDecrypt;
|
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? libloki.crypto.DecryptGCM
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: libloki.crypto.DHDecrypt;
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const plaintextBuffer = await decryptFn(sharedKey, ciphertextBuffer);
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const plaintextBuffer = await decryptFn(sharedKey, ciphertextBuffer, debug);
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if (debug) {
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log.debug(
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'lokiRpc::processOnionResponse - plaintextBuffer',
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plaintextBuffer.toString()
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|
);
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}
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const textDecoder = new TextDecoder();
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plaintext = textDecoder.decode(plaintextBuffer);
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} catch (e) {
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log.error(`(${reqIdx}) [path] decode error`);
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log.error(
|
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|
`(${reqIdx}) [path] lokiRpc::processOnionResponse - decode error`,
|
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|
|
|
e.code,
|
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|
|
|
e.message
|
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|
);
|
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|
|
log.error(
|
|
|
|
|
`(${reqIdx}) [path] lokiRpc::processOnionResponse - symKey`,
|
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|
|
|
StringView.arrayBufferToHex(sharedKey)
|
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|
|
|
);
|
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|
|
|
if (ciphertextBuffer) {
|
|
|
|
|
log.error(`(${reqIdx}) [path] ciphertextBuffer`, ciphertextBuffer);
|
|
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|
|
log.error(
|
|
|
|
|
`(${reqIdx}) [path] lokiRpc::processOnionResponse - ciphertextBuffer`,
|
|
|
|
|
StringView.arrayBufferToHex(ciphertextBuffer)
|
|
|
|
|
);
|
|
|
|
|
}
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (debug) {
|
|
|
|
|
log.debug('lokiRpc::processOnionResponse - plaintext', plaintext);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
try {
|
|
|
|
|
const jsonRes = JSON.parse(plaintext);
|
|
|
|
|
// emulate nodeFetch response...
|
|
|
|
|
@ -158,13 +367,22 @@ const processOnionResponse = async (reqIdx, response, sharedKey, useAesGcm) => {
|
|
|
|
|
const res = JSON.parse(jsonRes.body);
|
|
|
|
|
return res;
|
|
|
|
|
} catch (e) {
|
|
|
|
|
log.error(`(${reqIdx}) [path] parse error json: `, jsonRes.body);
|
|
|
|
|
log.error(
|
|
|
|
|
`(${reqIdx}) [path] lokiRpc::processOnionResponse - parse error inner json: `,
|
|
|
|
|
jsonRes.body
|
|
|
|
|
);
|
|
|
|
|
}
|
|
|
|
|
return false;
|
|
|
|
|
};
|
|
|
|
|
return jsonRes;
|
|
|
|
|
} catch (e) {
|
|
|
|
|
log.error('[path] parse error', e.code, e.message, `json:`, plaintext);
|
|
|
|
|
log.error(
|
|
|
|
|
`(${reqIdx}) [path] lokiRpc::processOnionResponse - parse error outer json`,
|
|
|
|
|
e.code,
|
|
|
|
|
e.message,
|
|
|
|
|
`json:`,
|
|
|
|
|
plaintext
|
|
|
|
|
);
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
};
|
|
|
|
|
@ -206,7 +424,7 @@ const sendToProxy = async (options = {}, targetNode, retryNumber = 0) => {
|
|
|
|
|
|
|
|
|
|
const snPubkeyHex = StringView.hexToArrayBuffer(targetNode.pubkey_x25519);
|
|
|
|
|
|
|
|
|
|
const myKeys = await window.libloki.crypto.generateEphemeralKeyPair();
|
|
|
|
|
const myKeys = await libloki.crypto.generateEphemeralKeyPair();
|
|
|
|
|
|
|
|
|
|
const symmetricKey = await libsignal.Curve.async.calculateAgreement(
|
|
|
|
|
snPubkeyHex,
|
|
|
|
|
@ -217,7 +435,7 @@ const sendToProxy = async (options = {}, targetNode, retryNumber = 0) => {
|
|
|
|
|
const body = JSON.stringify(options);
|
|
|
|
|
|
|
|
|
|
const plainText = textEncoder.encode(body);
|
|
|
|
|
const ivAndCiphertext = await window.libloki.crypto.DHEncrypt(
|
|
|
|
|
const ivAndCiphertext = await libloki.crypto.DHEncrypt(
|
|
|
|
|
symmetricKey,
|
|
|
|
|
plainText
|
|
|
|
|
);
|
|
|
|
|
@ -279,6 +497,7 @@ const sendToProxy = async (options = {}, targetNode, retryNumber = 0) => {
|
|
|
|
|
// grab a fresh random one
|
|
|
|
|
return sendToProxy(options, targetNode, pRetryNumber);
|
|
|
|
|
}
|
|
|
|
|
// 502 is "Next node not found"
|
|
|
|
|
|
|
|
|
|
// detect SNode is not ready (not in swarm; not done syncing)
|
|
|
|
|
// 503 can be proxy target or destination in pre 2.0.3
|
|
|
|
|
@ -364,7 +583,7 @@ const sendToProxy = async (options = {}, targetNode, retryNumber = 0) => {
|
|
|
|
|
'base64'
|
|
|
|
|
).toArrayBuffer();
|
|
|
|
|
|
|
|
|
|
const plaintextBuffer = await window.libloki.crypto.DHDecrypt(
|
|
|
|
|
const plaintextBuffer = await libloki.crypto.DHDecrypt(
|
|
|
|
|
symmetricKey,
|
|
|
|
|
ciphertextBuffer
|
|
|
|
|
);
|
|
|
|
|
@ -460,6 +679,7 @@ const lokiFetch = async (url, options = {}, targetNode = null) => {
|
|
|
|
|
// Wrong PoW difficulty
|
|
|
|
|
if (response.status === 432) {
|
|
|
|
|
const result = await response.json();
|
|
|
|
|
log.error(`lokirpc:::lokiFetch ${type} - WRONG POW`, result);
|
|
|
|
|
throw new textsecure.WrongDifficultyError(result.difficulty);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
@ -480,11 +700,10 @@ const lokiFetch = async (url, options = {}, targetNode = null) => {
|
|
|
|
|
// Get a path excluding `targetNode`:
|
|
|
|
|
// eslint-disable-next-line no-await-in-loop
|
|
|
|
|
const path = await lokiSnodeAPI.getOnionPath(targetNode);
|
|
|
|
|
const thisIdx = onionReqIdx;
|
|
|
|
|
onionReqIdx += 1;
|
|
|
|
|
const thisIdx = window.lokiSnodeAPI.assignOnionRequestNumber();
|
|
|
|
|
|
|
|
|
|
// eslint-disable-next-line no-await-in-loop
|
|
|
|
|
const result = await sendOnionRequest(
|
|
|
|
|
const result = await sendOnionRequestSnodeDest(
|
|
|
|
|
thisIdx,
|
|
|
|
|
path,
|
|
|
|
|
targetNode,
|
|
|
|
|
@ -640,4 +859,5 @@ const lokiRpc = (
|
|
|
|
|
|
|
|
|
|
module.exports = {
|
|
|
|
|
lokiRpc,
|
|
|
|
|
sendOnionRequestLsrpcDest,
|
|
|
|
|
};
|
|
|
|
|
|
Ryan Tharp
5 years ago
committed by
GitHub