I deployed a contract and would like to watch for events on that contract.

var access_manager_erc20_abi = require('./AccessManagerERC20_abi.js');  //To read the abi.

//In this js file i export abi into a variable and use it while creating instance of contract below.

//Smart contract address

var AccessManagerERC20ContractAddress = "0x3267ced1528c7eabe69bd129b3d0faf9986d6b55";

//creating instance of contract

AccessManagerERC20Contract = await new web3.eth.Contract(access_manager_erc20_abi,AccessManagerERC20ContractAddress);

watching for events, followed documentation from https://web3js.readthedocs.io/en/1.0/web3-eth-contract.html#events

    filter: {_producerGatewayID:acc[1]}}, function(error, event){ console.log(event); })
.on('data', function(event){
    console.log(event); // same results as the optional callback above
.on('changed', function(event){
    // remove event from local database
.on('error', console.error);

when I try to execute this piece of code, it says

TypeError: AccessManagerERC20Contract.events.getAccessERC20Event is not a function

Can someone help me please. I am using web 3 v1.0.0. beta.

Thanks in advance

  • Is your event actually called getAccessERC20Event? Could you share your contract code or ABI?
    – user19510
    Apr 25, 2018 at 14:04
  • Try AccessManagerERC20Contract.getAccessERC20Event().watch(function (error, result){ //do something with results here })
    – Gabe
    Apr 25, 2018 at 14:23
  • It would be helpful to see your ABI. Maybe it isn't in proper JSON format? Apr 25, 2018 at 15:57
  • @smarx, yes the event name is correct. Here is the ABI code github.com/katkol/Share/blob/master/AccessManagerERC20_abi.js
    – K Kolluru
    Apr 25, 2018 at 20:07
  • @Gabe I get similar error with this code as well, TypeError: AccessManagerERC20Contract.getAccessERC20Event is not a function
    – K Kolluru
    Apr 25, 2018 at 20:15

1 Answer 1


I will just point to another question that you just asked because this seems to be the same problem:

using abi generated by truffle in DApp

If you look at your abi-file it is the same problem and you need to call:

AccessManagerERC20Contract = await new web3.eth.Contract(access_manager_erc20_abi.abi,AccessManagerERC20ContractAddress);
  • Hi, after changing the abi part the event also worked. Cannot point out the reason behind though.
    – K Kolluru
    Apr 26, 2018 at 11:33
  • Also I am using ws provider instead of http.
    – K Kolluru
    Apr 26, 2018 at 11:45

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