When Insight falls over, rest reveals its IP address in the stack trace. The scope of this issue is to improve the error handling so that this information is not displayed. Here is an example from a curl statement to rest when testnet Insight was down:
{"error":"{ Error: connect ECONNREFUSED 159.203.177.17:3001\n at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1107:14)\n errno: 'ECONNREFUSED',\n code: 'ECONNREFUSED',\n syscall: 'connect',\n address: '159.203.177.17',\n port: 3001,\n config:\n { url:\n 'http://159.203.177.17:3001/api/addr/mvQPGnzRT6gMWASZBMg7NcT3vmvsSKSQtf?from=0&to=1000',\n method: 'get',\n headers:\n { Accept: 'application/json, text/plain, */*',\n 'User-Agent': 'axios/0.19.0' },\n transformRequest: [ [Function: transformRequest] ],\n transformResponse: [ [Function: transformResponse] ],\n timeout: 0,\n adapter: [Function: httpAdapter],\n xsrfCookieName: 'XSRF-TOKEN',\n xsrfHeaderName: 'X-XSRF-TOKEN',\n maxContentLength: -1,\n validateStatus: [Function: validateStatus],\n data: undefined },\n request:\n Writable {\n _writableState:\n WritableState {\n objectMode: false,\n highWaterMark: 16384,\n finalCalled: false,\n needDrain: false,\n ending: false,\n ended: false,\n finished: false,\n destroyed: false,\n decodeStrings: true,\n defaultEncoding: 'utf8',\n length: 0,\n writing: false,\n corked: 0,\n sync: true,\n bufferProcessing: false,\n onwrite: [Function: bound onwrite],\n writecb: null,\n writelen: 0,\n bufferedRequest: null,\n lastBufferedRequest: null,\n pendingcb: 0,\n prefinished: false,\n errorEmitted: false,\n emitClose: true,\n autoDestroy: false,\n bufferedRequestCount: 0,\n corkedRequestsFree:\n { next: null,\n entry: null,\n finish: [Function: bound onCorkedFinish] } },\n writable: true,\n _events:\n [Object: null prototype] {\n response: [Function: handleResponse],\n error: [Function: handleRequestError] },\n _eventsCount: 2,\n _maxListeners: undefined,\n _options:\n { protocol: 'http:',\n maxRedirects: 21,\n maxBodyLength: 10485760,\n path:\n '/api/addr/mvQPGnzRT6gMWASZBMg7NcT3vmvsSKSQtf?from=0&to=1000',\n method: 'GET',\n headers:\n { Accept: 'application/json, text/plain, */*',\n 'User-Agent': 'axios/0.19.0' },\n agent: undefined,\n auth: undefined,\n hostname: '159.203.177.17',\n port: '3001',\n nativeProtocols:\n { 'http:':\n { _connectionListener: [Function: connectionListener],\n METHODS:\n [ 'ACL',\n 'BIND',\n 'CHECKOUT',\n 'CONNECT',\n 'COPY',\n 'DELETE',\n 'GET',\n 'HEAD',\n 'LINK',\n 'LOCK',\n 'M-SEARCH',\n 'MERGE',\n 'MKACTIVITY',\n 'MKCALENDAR',\n 'MKCOL',\n 'MOVE',\n 'NOTIFY',\n 'OPTIONS',\n 'PATCH',\n 'POST',\n 'PROPFIND',\n 'PROPPATCH',\n 'PURGE',\n 'PUT',\n 'REBIND',\n 'REPORT',\n 'SEARCH',\n 'SOURCE',\n 'SUBSCRIBE',\n 'TRACE',\n 'UNBIND',\n 'UNLINK',\n 'UNLOCK',\n 'UNSUBSCRIBE' ],\n STATUS_CODES:\n { '100': 'Continue',\n '101': 'Switching Protocols',\n '102': 'Processing',\n '103': 'Early Hints',\n '200': 'OK',\n '201': 'Created',\n '202': 'Accepted',\n '203': 'Non-Authoritative Information',\n '204': 'No Content',\n '205': 'Reset Content',\n '206': 'Partial Content',\n '207': 'Multi-Status',\n '208': 'Already Reported',\n '226': 'IM Used',\n '300': 'Multiple Choices',\n '301': 'Moved Permanently',\n '302': 'Found',\n '303': 'See Other',\n '304': 'Not Modified',\n '305': 'Use Proxy',\n '307': 'Temporary Redirect',\n '308': 'Permanent Redirect',\n '400': 'Bad Request',\n '401': 'Unauthorized',\n '402': 'Payment Required',\n '403': 'Forbidden',\n '404': 'Not Found',\n '405': 'Method Not Allowed',\n '406': 'Not Acceptable',\n '407': 'Proxy Authentication Required',\n '408': 'Request Timeout',\n '409': 'Conflict',\n '410': 'Gone',\n '411': 'Length Required',\n '412': 'Precondition Failed',\n '413': 'Payload Too Large',\n '414': 'URI Too Long',\n '415': 'Unsupported Media Type',\n '416': 'Range Not Satisfiable',\n '417': 'Expectation Failed',\n '418': 'I\\'m a Teapot',\n '421': 'Misdirected Request',\n '422': 'Unprocessable Entity',\n '423': 'Locked',\n '424': 'Failed Dependency',\n '425': 'Unordered Collection',\n '426': 'Upgrade Required',\n '428': 'Precondition Required',\n '429': 'Too Many Requests',\n '431': 'Request Header Fields Too Large',\n '451': 'Unavailable For Legal Reasons',\n '500': 'Internal Server Error',\n '501': 'Not Implemented',\n '502': 'Bad Gateway',\n '503': 'Service Unavailable',\n '504': 'Gateway Timeout',\n '505': 'HTTP Version Not Supported',\n '506': 'Variant Also Negotiates',\n '507': 'Insufficient Storage',\n '508': 'Loop Detected',\n '509': 'Bandwidth Limit Exceeded',\n '510': 'Not Extended',\n '511': 'Network Authentication Required' },\n Agent:\n { [Function: Agent] super_: [Function], defaultMaxSockets: Infinity },\n ClientRequest: { [Function: ClientRequest] super_: [Function] },\n IncomingMessage: { [Function: IncomingMessage] super_: [Function] },\n OutgoingMessage: { [Function: OutgoingMessage] super_: [Function] },\n Server: { [Function: Server] super_: [Function] },\n ServerResponse: { [Function: ServerResponse] super_: [Function] },\n createServer: [Function: createServer],\n get: [Function: get],\n request: [Function: request],\n maxHeaderSize: [Getter],\n globalAgent: [Getter/Setter] },\n 'https:':\n { Agent: { [Function: Agent] super_: [Function] },\n globalAgent:\n Agent {\n _events: [Object],\n _eventsCount: 1,\n _maxListeners: undefined,\n defaultPort: 443,\n protocol: 'https:',\n options: [Object],\n requests: {},\n sockets: {},\n freeSockets: {},\n keepAliveMsecs: 1000,\n keepAlive: false,\n maxSockets: Infinity,\n maxFreeSockets: 256,\n maxCachedSessions: 100,\n _sessionCache: [Object] },\n Server: { [Function: Server] super_: [Function] },\n createServer: [Function: createServer],\n get: [Function: get],\n request: [Function: request] } },\n pathname: '/api/addr/mvQPGnzRT6gMWASZBMg7NcT3vmvsSKSQtf',\n search: '?from=0&to=1000' },\n _redirectCount: 0,\n _redirects: [],\n _requestBodyLength: 0,\n _requestBodyBuffers: [],\n _onNativeResponse: [Function],\n _currentRequest:\n ClientRequest {\n _events:\n [Object: null prototype] {\n response: { [Function: bound onceWrapper] listener: [Function] },\n socket: [Function],\n abort: [Function],\n aborted: [Function],\n error: [Function],\n timeout: [Function] },\n _eventsCount: 6,\n _maxListeners: undefined,\n output: [],\n outputEncodings: [],\n outputCallbacks: [],\n outputSize: 0,\n writable: true,\n _last: true,\n chunkedEncoding: false,\n shouldKeepAlive: false,\n useChunkedEncodingByDefault: false,\n sendDate: false,\n _removedConnection: false,\n _removedContLen: false,\n _removedTE: false,\n _contentLength: 0,\n _hasBody: true,\n _trailer: '',\n finished: true,\n _headerSent: true,\n socket:\n Socket {\n connecting: false,\n _hadError: true,\n _handle: null,\n _parent: null,\n _host: null,\n _readableState:\n ReadableState {\n objectMode: false,\n highWaterMark: 16384,\n buffer: BufferList { head: null, tail: null, length: 0 },\n length: 0,\n pipes: null,\n pipesCount: 0,\n flowing: true,\n ended: false,\n endEmitted: false,\n reading: true,\n sync: false,\n needReadable: true,\n emittedReadable: false,\n readableListening: false,\n resumeScheduled: false,\n paused: false,\n emitClose: false,\n autoDestroy: false,\n destroyed: true,\n defaultEncoding: 'utf8',\n awaitDrain: 0,\n readingMore: false,\n decoder: null,\n encoding: null },\n readable: false,\n _events:\n [Object: null prototype] {\n end: [Function: onReadableStreamEnd],\n connect: [ [Function], [Function], [Function] ],\n free: [Function: onFree],\n close: [ [Function: onClose], [Function: socketCloseListener] ],\n agentRemove: [Function: onRemove],\n drain: [Function: ondrain],\n error: [Function: socketErrorListener] },\n _eventsCount: 7,\n _maxListeners: undefined,\n _writableState:\n WritableState {\n objectMode: false,\n highWaterMark: 16384,\n finalCalled: false,\n needDrain: false,\n ending: false,\n ended: false,\n finished: false,\n destroyed: true,\n decodeStrings: false,\n defaultEncoding: 'utf8',\n length: 191,\n writing: true,\n corked: 0,\n sync: false,\n bufferProcessing: false,\n onwrite: [Function: bound onwrite],\n writecb: [Function: bound onFinish],\n writelen: 191,\n bufferedRequest: null,\n lastBufferedRequest: null,\n pendingcb: 1,\n prefinished: false,\n errorEmitted: true,\n emitClose: false,\n autoDestroy: false,\n bufferedRequestCount: 0,\n corkedRequestsFree:\n { next: null,\n entry: null,\n finish: [Function: bound onCorkedFinish] } },\n writable: false,\n allowHalfOpen: false,\n _sockname: null,\n _pendingData:\n 'GET /api/addr/mvQPGnzRT6gMWASZBMg7NcT3vmvsSKSQtf?from=0&to=1000 HTTP/1.1\\r\\nAccept: application/json, text/plain, */*\\r\\nUser-Agent: axios/0.19.0\\r\\nHost: 159.203.177.17:3001\\r\\nConnection: close\\r\\n\\r\\n',\n _pendingEncoding: 'latin1',\n server: null,\n _server: null,\n parser: null,\n _httpMessage: [Circular],\n [Symbol(asyncId)]: 1338660460,\n [Symbol(lastWriteQueueSize)]: 0,\n [Symbol(timeout)]: null,\n [Symbol(kBytesRead)]: 0,\n [Symbol(kBytesWritten)]: 0 },\n connection:\n Socket {\n connecting: false,\n _hadError: true,\n _handle: null,\n _parent: null,\n _host: null,\n _readableState:\n ReadableState {\n objectMode: false,\n highWaterMark: 16384,\n buffer: BufferList { head: null, tail: null, length: 0 },\n length: 0,\n pipes: null,\n pipesCount: 0,\n flowing: true,\n ended: false,\n endEmitted: false,\n reading: true,\n sync: false,\n needReadable: true,\n emittedReadable: false,\n readableListening: false,\n resumeScheduled: false,\n paused: false,\n emitClose: false,\n autoDestroy: false,\n destroyed: true,\n defaultEncoding: 'utf8',\n awaitDrain: 0,\n readingMore: false,\n decoder: null,\n encoding: null },\n readable: false,\n _events:\n [Object: null prototype] {\n end: [Function: onReadableStreamEnd],\n connect: [ [Function], [Function], [Function] ],\n free: [Function: onFree],\n close: [ [Function: onClose], [Function: socketCloseListener] ],\n agentRemove: [Function: onRemove],\n drain: [Function: ondrain],\n error: [Function: socketErrorListener] },\n _eventsCount: 7,\n _maxListeners: undefined,\n _writableState:\n WritableState {\n objectMode: false,\n highWaterMark: 16384,\n finalCalled: false,\n needDrain: false,\n ending: false,\n ended: false,\n finished: false,\n destroyed: true,\n decodeStrings: false,\n defaultEncoding: 'utf8',\n length: 191,\n writing: true,\n corked: 0,\n sync: false,\n bufferProcessing: false,\n onwrite: [Function: bound onwrite],\n writecb: [Function: bound onFinish],\n writelen: 191,\n bufferedRequest: null,\n lastBufferedRequest: null,\n pendingcb: 1,\n prefinished: false,\n errorEmitted: true,\n emitClose: false,\n autoDestroy: false,\n bufferedRequestCount: 0,\n corkedRequestsFree:\n { next: null,\n entry: null,\n finish: [Function: bound onCorkedFinish] } },\n writable: false,\n allowHalfOpen: false,\n _sockname: null,\n _pendingData:\n 'GET /api/addr/mvQPGnzRT6gMWASZBMg7NcT3vmvsSKSQtf?from=0&to=1000 HTTP/1.1\\r\\nAccept: application/json, text/plain, */*\\r\\nUser-Agent: axios/0.19.0\\r\\nHost: 159.203.177.17:3001\\r\\nConnection: close\\r\\n\\r\\n',\n _pendingEncoding: 'latin1',\n server: null,\n _server: null,\n parser: null,\n _httpMessage: [Circular],\n [Symbol(asyncId)]: 1338660460,\n [Symbol(lastWriteQueueSize)]: 0,\n [Symbol(timeout)]: null,\n [Symbol(kBytesRead)]: 0,\n [Symbol(kBytesWritten)]: 0 },\n _header:\n 'GET /api/addr/mvQPGnzRT6gMWASZBMg7NcT3vmvsSKSQtf?from=0&to=1000 HTTP/1.1\\r\\nAccept: application/json, text/plain, */*\\r\\nUser-Agent: axios/0.19.0\\r\\nHost: 159.203.177.17:3001\\r\\nConnection: close\\r\\n\\r\\n',\n _onPendingData: [Function: noopPendingOutput],\n agent:\n Agent {\n _events: [Object: null prototype] { free: [Function] },\n _eventsCount: 1,\n _maxListeners: undefined,\n defaultPort: 80,\n protocol: 'http:',\n options: { path: null },\n requests: {},\n sockets:\n { '159.203.177.17:3001:':\n [ [Socket],\n [Socket],\n [Socket],\n [Socket],\n [Socket],\n [Socket],\n [Socket],\n [Socket] ] },\n freeSockets: {},\n keepAliveMsecs: 1000,\n keepAlive: false,\n maxSockets: Infinity,\n maxFreeSockets: 256 },\n socketPath: undefined,\n timeout: undefined,\n method: 'GET',\n path:\n '/api/addr/mvQPGnzRT6gMWASZBMg7NcT3vmvsSKSQtf?from=0&to=1000',\n _ended: false,\n res: null,\n aborted: undefined,\n timeoutCb: null,\n upgradeOrConnect: false,\n parser: null,\n maxHeadersCount: null,\n _redirectable: [Circular],\n [Symbol(isCorked)]: false,\n [Symbol(outHeadersKey)]:\n [Object: null prototype] {\n accept: [ 'Accept', 'application/json, text/plain, */*' ],\n 'user-agent': [ 'User-Agent', 'axios/0.19.0' ],\n host: [ 'Host', '159.203.177.17:3001' ] } },\n _currentUrl:\n 'http://159.203.177.17:3001/api/addr/mvQPGnzRT6gMWASZBMg7NcT3vmvsSKSQtf?from=0&to=1000' },\n response: undefined,\n isAxiosError: true,\n toJSON: [Function] }"}
When Insight falls over, rest reveals its IP address in the stack trace. The scope of this issue is to improve the error handling so that this information is not displayed. Here is an example from a curl statement to rest when testnet Insight was down:
curl -X GET "https://trest.bitcoin.com/v2/address/details/bchtest:qz35h5mfa8w2pqma2jq06lp7dnv5fxkp2svtllzmlf" -H "accept: application/json"Results in this returned: