Flatten: Throws error due to end-of-file in api response

[plotchy]

Hello, I have been using flatten to look at the Resonate protocol's contracts and found a runtime error that feels out of place.

Reproducible command sol2uml flatten --network fantom 0x1a5c2ee3fb7fe4a2c2e42474a3657c71f6c775cf

A few affected contracts

https://ftmscan.com/address/0x062B3aB17dFac433F9E211F95e6a7A0C627c9a62
https://optimistic.etherscan.io/address/0x22031BE61b10d2C6cC9648f251E1284Be5AFa3f9
https://ftmscan.com/address/0x8e20A69aF81eaeDD74589C9d0684557fd54b0DdA
https://ftmscan.com/address/0xdB84260bE05054b42a71D4a287fF17a199C1c8FF
https://ftmscan.com/address/0x1A5C2ee3FB7fe4A2C2e42474a3657C71f6C775CF
https://ftmscan.com/address/0xA6273F603985D13Ea7405B1B497C3b2F7D798Fd2
https://ftmscan.com/address/0xeF1ffCa755216941874Bd2ab28C9CfC2F3f652bC

Error dump

AxiosError: unexpected end of file
    at AxiosError.from (/home/plotchy/.nvm/versions/node/v18.2.0/lib/node_modules/sol2uml/node_modules/axios/dist/node/axios.cjs:785:14)
    at BrotliDecompress.handleStreamError (/home/plotchy/.nvm/versions/node/v18.2.0/lib/node_modules/sol2uml/node_modules/axios/dist/node/axios.cjs:2696:29)
    at BrotliDecompress.emit (node:events:539:35)
    at emitErrorNT (node:internal/streams/destroy:151:8)
    at emitErrorCloseNT (node:internal/streams/destroy:116:3)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
  code: 'Z_BUF_ERROR',
  errno: -5,
  config: {
    transitional: {
      silentJSONParsing: true,
      forcedJSONParsing: true,
      clarifyTimeoutError: false
    },
    adapter: [ 'xhr', 'http' ],
    transformRequest: [ [Function: transformRequest] ],
    transformResponse: [ [Function: transformResponse] ],
    timeout: 0,
    xsrfCookieName: 'XSRF-TOKEN',
    xsrfHeaderName: 'X-XSRF-TOKEN',
    maxContentLength: -1,
    maxBodyLength: -1,
    env: { FormData: [Function], Blob: [class Blob] },
    validateStatus: [Function: validateStatus],
    headers: AxiosHeaders {
      Accept: 'application/json, text/plain, */*',
      'User-Agent': 'axios/1.2.1',
      'Accept-Encoding': 'gzip, compress, deflate, br'
    },
    params: {
      module: 'contract',
      action: 'getsourcecode',
      address: '0x22031BE61b10d2C6cC9648f251E1284Be5AFa3f9',
      apikey: 'FEXS1HXVA4Y2RNTMEA8V1UTK21S4JWHH9U'
    },
    method: 'get',
    url: 'https://api-optimistic.etherscan.io/api',
    data: undefined
  },
  request: <ref *1> ClientRequest {
    _events: [Object: null prototype] {
      abort: [Function (anonymous)],
      aborted: [Function (anonymous)],
      connect: [Function (anonymous)],
      error: [Function (anonymous)],
      socket: [Function (anonymous)],
      timeout: [Function (anonymous)],
      prefinish: [Function: requestOnPrefinish]
    },
    _eventsCount: 7,
    _maxListeners: undefined,
    outputData: [],
    outputSize: 0,
    writable: true,
    destroyed: false,
    _last: true,
    chunkedEncoding: false,
    shouldKeepAlive: false,
    maxRequestsOnConnectionReached: false,
    _defaultKeepAlive: true,
    useChunkedEncodingByDefault: false,
    sendDate: false,
    _removedConnection: false,
    _removedContLen: false,
    _removedTE: false,
    _contentLength: 0,
    _hasBody: true,
    _trailer: '',
    finished: true,
    _headerSent: true,
    _closed: false,
    socket: TLSSocket {
      _tlsOptions: [Object],
      _secureEstablished: true,
      _securePending: false,
      _newSessionPending: false,
      _controlReleased: true,
      secureConnecting: false,
      _SNICallback: null,
      servername: 'api-optimistic.etherscan.io',
      alpnProtocol: false,
      authorized: true,
      authorizationError: null,
      encrypted: true,
      _events: [Object: null prototype],
      _eventsCount: 10,
      connecting: false,
      _hadError: false,
      _parent: null,
      _host: 'api-optimistic.etherscan.io',
      _readableState: [ReadableState],
      _maxListeners: undefined,
      _writableState: [WritableState],
      allowHalfOpen: false,
      _sockname: null,
      _pendingData: null,
      _pendingEncoding: '',
      server: undefined,
      _server: null,
      ssl: [TLSWrap],
      _requestCert: true,
      _rejectUnauthorized: true,
      parser: null,
      _httpMessage: [Circular *1],
      [Symbol(res)]: [TLSWrap],
      [Symbol(verified)]: true,
      [Symbol(pendingSession)]: null,
      [Symbol(async_id_symbol)]: 7,
      [Symbol(kHandle)]: [TLSWrap],
      [Symbol(lastWriteQueueSize)]: 0,
      [Symbol(timeout)]: null,
      [Symbol(kBuffer)]: null,
      [Symbol(kBufferCb)]: null,
      [Symbol(kBufferGen)]: null,
      [Symbol(kCapture)]: false,
      [Symbol(kSetNoDelay)]: false,
      [Symbol(kSetKeepAlive)]: true,
      [Symbol(kSetKeepAliveInitialDelay)]: 60,
      [Symbol(kBytesRead)]: 0,
      [Symbol(kBytesWritten)]: 0,
      [Symbol(connect-options)]: [Object]
    },
    _header: 'GET /api?module=contract&action=getsourcecode&address=0x22031BE61b10d2C6cC9648f251E1284Be5AFa3f9&apikey=FEXS1HXVA4Y2RNTMEA8V1UTK21S4JWHH9U HTTP/1.1\r\n' +
      'Accept: application/json, text/plain, */*\r\n' +
      'User-Agent: axios/1.2.1\r\n' +
      'Accept-Encoding: gzip, compress, deflate, br\r\n' +
      'Host: api-optimistic.etherscan.io\r\n' +
      'Connection: close\r\n' +
      '\r\n',
    _keepAliveTimeout: 0,
    _onPendingData: [Function: nop],
    agent: Agent {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      defaultPort: 443,
      protocol: 'https:',
      options: [Object: null prototype],
      requests: [Object: null prototype] {},
      sockets: [Object: null prototype],
      freeSockets: [Object: null prototype] {},
      keepAliveMsecs: 1000,
      keepAlive: false,
      maxSockets: Infinity,
      maxFreeSockets: 256,
      scheduling: 'lifo',
      maxTotalSockets: Infinity,
      totalSocketCount: 1,
      maxCachedSessions: 100,
      _sessionCache: [Object],
      [Symbol(kCapture)]: false
    },
    socketPath: undefined,
    method: 'GET',
    maxHeaderSize: undefined,
    insecureHTTPParser: undefined,
    path: '/api?module=contract&action=getsourcecode&address=0x22031BE61b10d2C6cC9648f251E1284Be5AFa3f9&apikey=FEXS1HXVA4Y2RNTMEA8V1UTK21S4JWHH9U',
    _ended: true,
    res: IncomingMessage {
      _readableState: [ReadableState],
      _events: [Object: null prototype],
      _eventsCount: 4,
      _maxListeners: undefined,
      socket: [TLSSocket],
      httpVersionMajor: 1,
      httpVersionMinor: 1,
      httpVersion: '1.1',
      complete: true,
      rawHeaders: [Array],
      rawTrailers: [],
      aborted: false,
      upgrade: false,
      url: '',
      method: null,
      statusCode: 200,
      statusMessage: 'OK',
      client: [TLSSocket],
      _consuming: true,
      _dumped: false,
      req: [Circular *1],
      responseUrl: 'https://api-optimistic.etherscan.io/api?module=contract&action=getsourcecode&address=0x22031BE61b10d2C6cC9648f251E1284Be5AFa3f9&apikey=FEXS1HXVA4Y2RNTMEA8V1UTK21S4JWHH9U',
      redirects: [],
      [Symbol(kCapture)]: false,
      [Symbol(kHeaders)]: [Object],
      [Symbol(kHeadersCount)]: 30,
      [Symbol(kTrailers)]: null,
      [Symbol(kTrailersCount)]: 0
    },
    aborted: false,
    timeoutCb: null,
    upgradeOrConnect: false,
    parser: null,
    maxHeadersCount: null,
    reusedSocket: false,
    host: 'api-optimistic.etherscan.io',
    protocol: 'https:',
    _redirectable: Writable {
      _writableState: [WritableState],
      _events: [Object: null prototype],
      _eventsCount: 3,
      _maxListeners: undefined,
      _options: [Object],
      _ended: true,
      _ending: true,
      _redirectCount: 0,
      _redirects: [],
      _requestBodyLength: 0,
      _requestBodyBuffers: [],
      _onNativeResponse: [Function (anonymous)],
      _currentRequest: [Circular *1],
      _currentUrl: 'https://api-optimistic.etherscan.io/api?module=contract&action=getsourcecode&address=0x22031BE61b10d2C6cC9648f251E1284Be5AFa3f9&apikey=FEXS1HXVA4Y2RNTMEA8V1UTK21S4JWHH9U',
      [Symbol(kCapture)]: false
    },
    [Symbol(kCapture)]: false,
    [Symbol(kNeedDrain)]: false,
    [Symbol(corked)]: 0,
    [Symbol(kOutHeaders)]: [Object: null prototype] {
      accept: [Array],
      'user-agent': [Array],
      'accept-encoding': [Array],
      host: [Array]
    }
  },
  cause: Error: unexpected end of file
      at BrotliDecoder.zlibOnError [as onerror] (node:zlib:189:17) {
    errno: -5,
    code: 'Z_BUF_ERROR'
  }
}

[naddison36]

Looks like an issue with the latest axios release https://github.com/axios/axios/issues/5346.

It works if I downgrade to v1.1.3

[naddison36]

Fixed with release https://github.com/naddison36/sol2uml/releases/tag/v2.4.1

[plotchy]

On a fresh uninstall->reinstall, the package-lock.json still contains axios v1.2.1

Does the ^ in the semver versioning of ^1.1.3 cause this to default to v1.2.1?

[naddison36]

you are correct. Pls try https://github.com/naddison36/sol2uml/releases/tag/v2.4.2