Serverless.com offline mode: Error: Cannot find module web3-requestManager

[ghost]

• Running web3.js 1.0.0-beta-18
• Error occurs inside a javascript/node function in serverless running in local/offline mode

foo/list.js:

'use strict';

const AWS = require('aws-sdk');
const Web3 = require('web3');

module.exports.list = (event, context, callback) => {
    var web3 = new Web3();
    var provider = "https://ropsten.infura.io/xxx";
    web3.setProvider(new web3.providers.HttpProvider(provider));
    var account = "foo";
    var balanceWei = web3.eth.getBalance(account).toNumber();
    // create a response
    const response = {
      statusCode: 200,
      body: JSON.stringify([balanceWei]),
    };
    callback(null, response);
};

$ serverless offline start
Serverless: Starting Offline: dev/us-east-1.
...
Serverless: Offline listening on http://localhost:3000
Serverless: Error while loading list
[ 'Error: Cannot find module \'web3-requestManager\'',
  'at Function.Module._resolveFilename (module.js:542:15)',
  'at Function.Module._load (module.js:472:25)',
  'at Module.require (module.js:585:17)',
  'at require (internal/module.js:11:18)',
  'at Object.<anonymous> (/Path/To/Foo/node_modules/web3/packages/web3-core/src/index.js:26:22)',
  'at Module._compile (module.js:641:30)',
  'at Object.Module._extensions..js (module.js:652:10)',
  'at Module.load (module.js:560:32)',
  'at tryModuleLoad (module.js:503:12)',
  'at Function.Module._load (module.js:495:3)',
  'at Module.require (module.js:585:17)',
  'at require (internal/module.js:11:18)',
  'at Object.<anonymous> (/node_modules/web3/src/index.js:32:12)',
  'at Module._compile (module.js:641:30)',
  'at Object.Module._extensions..js (module.js:652:10)',
  'at Module.load (module.js:560:32)',
  'at tryModuleLoad (module.js:503:12)',
  'at Function.Module._load (module.js:495:3)',
  'at Module.require (module.js:585:17)',
  'at require (internal/module.js:11:18)',
  'at Object.<anonymous> (/Path/To/Foo/bulbs/list.js:4:14)',
  'at Module._compile (module.js:641:30)',
  'at Object.Module._extensions..js (module.js:652:10)',
  'at Module.load (module.js:560:32)',
  'at tryModuleLoad (module.js:503:12)',
  'at Function.Module._load (module.js:495:3)',
  'at Module.require (module.js:585:17)',
  'at require (internal/module.js:11:18)',
  'at Object.createHandler (/Path/To/Foo/node_modules/serverless-offline/src/functionHelper.js:35:21)',
  'at handler (/Path/To/Foo/node_modules/serverless-offline/src/index.js:499:40)',
  'at Object.internals.handler (/Path/To/Foo/node_modules/hapi/lib/handler.js:96:36)',
  'at request._protect.run (/Path/To/Foo/node_modules/hapi/lib/handler.js:30:23)',
  'at module.exports.internals.Protect.internals.Protect.run (/Path/To/Foo/node_modules/hapi/lib/protect.js:64:5)',
  'at exports.execute (/Path/To/Foo/node_modules/hapi/lib/handler.js:24:22)',
  'at each (/Path/To/Foo/node_modules/hapi/lib/request.js:384:16)',
  'at iterate (/Path/To/Foo/node_modules/items/lib/index.js:36:13)',
  'at done (/Path/To/Foo/node_modules/items/lib/index.js:28:25)',
  'at module.exports.internals.Auth.internals.Auth._authenticate (/Path/To/Foo/node_modules/hapi/lib/auth.js:210:16)',
  'at internals.Auth.authenticate (/Path/To/Foo/node_modules/hapi/lib/auth.js:202:17)',
  'at each (/Path/To/Foo/node_modules/hapi/lib/request.js:384:16)',
  'at iterate (/Path/To/Foo/node_modules/items/lib/index.js:36:13)',
  'at done (/Path/To/Foo/node_modules/items/lib/index.js:28:25)',
  'at internals.state (/Path/To/Foo/node_modules/hapi/lib/route.js:357:16)',
  'at each (/Path/To/Foo/node_modules/hapi/lib/request.js:384:16)',
  'at iterate (/Path/To/Foo/node_modules/items/lib/index.js:36:13)',
  'at Object.exports.serial (/Path/To/Foo/node_modules/items/lib/index.js:39:9)',
  'at internals.Request._lifecycle (/Path/To/Foo/node_modules/hapi/lib/request.js:387:11)',
  'at internals.Request._execute (/Path/To/Foo/node_modules/hapi/lib/request.js:302:21)',
  'at Domain.request._protect.enter (/Path/To/Foo/node_modules/hapi/lib/connection.js:261:25)',
  'at Domain.run (domain.js:227:14)',
  'at module.exports.internals.Protect.internals.Protect.enter (/Path/To/Foo/node_modules/hapi/lib/protect.js:80:17)',
  'at Server.<anonymous> (/Path/To/Foo/node_modules/hapi/lib/connection.js:259:30)',
  'at Server.emit (events.js:159:13)',
  'at parserOnIncoming (_http_server.js:619:12)' ]

[OR13]

This error is discussed here: #966

I have found that it can resurface randomly with lerna, yarn, npm version changes, etc...

Confirm that cat node_modules/web3/package.json

has something like:

  "types": "index.d.ts",
  "version": "1.0.0-beta.27"
}

at the bottom. the version should match your package.json, but you may find it does not when seeing this error.

Manually installing a specific version number seems to resolve this issue:

npm install web3@1.0.0-beta.27 --save

[wtam]

@OR13, not sure what is the different, I still got the error with web3@1.0.0-beta.27. FYI I'm on Win10 and this error appear when run the docker-compose up which I got a nodejs app using web3

[nivida]

Please ask this question on https://ethereum.stackexchange.com/