Error on Events triggering

[marsniper27]

Ethers Version

6.02

Search Terms

events, event

Describe the Problem

While creating event listeners upon receipt of event an error occurs. Simplified example provided.
This is occurring for multiple contracts and events. Switching to v5.7.2 the events work fine.

Code Snippet

const { ethers } =  require(`ethers`);

const newEthersClient = new ethers.providers.JsonRpcProvider('https://rpc.ankr.com/polygon/486f6d938d85e35aeacf83a59afd95c4fab739093c8f919adb258799d81d51bf');

abi = [
    "event Transfer(address indexed from, address indexed to, uint amount)"
  ]
  
  contract = new ethers.Contract("0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063", abi, newEthersClient)
  
  // Begin listening for any Transfer event
  contract.on("Transfer", (from, to, _amount, event) => {
    const amount = ethers.formatEther(_amount, 18)
    console.log(`${ from } => ${ to }: ${ amount }`);
  
    // The `event.log` has the entire EventLog
  
    // Optionally, convenience method to stop listening
    event.removeListener();
  });

Contract ABI

[
    "event Transfer(address indexed from, address indexed to, uint amount)"
  ]

Errors

Uncaught TypeError TypeError: unknown ProviderEvent (argument="event", value="{\"topics\":[\"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef\"],\"address\":[\"0x8f3cf7ad23cd3cadbd9735aff958023239c6a063\"]}", code=INVALID_ARGUMENT, version=6.0.2)

Environment

node.js (v12 or newer)

Environment (Other)

No response

[ricmoo]

The problem seems to be that the specified backend does not support the eth_newFilter method.

In v5, polling was always used, which is why it continues to work.

In v6, it is supposed to detect this and fallback onto polling, so I'm looking into why it isn't. I think it has to do with detection. When Geth doesn't support filters, it returns a null filter ID, while it looks like Polygon throws an error instead.

[samuelmonday699]

Where did you need?

[ricmoo]

This should be fixed now. Let me know if you have any more issues.

Thanks! :)

[marsniper27]

Just tested and seems to be working on JsonRPC but still same error if i try with a websocket.

[ricmoo]

Thanks! I’ll look into it shortly.

[ricmoo]

I think it might be a little more difficult to support a connection-based provider. It seems strange to me that something that supports long-lived connections doesn’t support filters. Do you have a websocket url I can test against?

[FancyLobster]

Hello @ricmoo , I am having almost the exact same issue while listening for the "PairCreated" event from the Uniswap v2 Factory with the new 6.0.5 version.

Here is the error message:

error = new TypeError(message);
                    ^
TypeError: unknown ProviderEvent (argument="event", value="{\"topics\":[\"0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9\"],\"address\":[\"0x5c69bee701ef814a2b6a3edd4b1652cb9cc5aa6f\"]}", code=INVALID_ARGUMENT, version=6.0.5)

And here is some of my code:

const account = wallet.connect(provider); 
const factory = new ethers.Contract(
   addresses.factory,
   [
   "event PairCreated(address indexed token0, address indexed token1, address pair, uint)", 
   ],
   account
   );
        
factory.on("PairCreated", async (token0, token1, pair_address) => {
  // Handle Incoming Parameters Here
}

[ricmoo]

@FancyLobster what network and provider are you using?

[FancyLobster]

Ethereum and Quicknode -------- Original message --------From: Richard Moore ***@***.***> Date: 2/19/23 6:47 PM (GMT-06:00) To: "ethers-io/ethers.js" ***@***.***> Cc: William ***@***.***>, Mention ***@***.***> Subject: Re: [ethers-io/ethers.js] Error on Events triggering (Issue #3767) @FancyLobster what network and provider are you using? —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you were mentioned.Message ID: ***@***.***>

[saccura]

hello @ricmoo. Have the same issue while listening from websocket connection

CONTRACT_DEAL.on(
  'Sold',
  onSellOrBought
);

The error:

uncaughtException: unknown ProviderEvent (argument="event", value="{"topics":["0xb7cfccdb200d3b32433aeb5d2b829c5191534e3602213c2fbb1d2de273a91f20"],"address":["0x1aeca9d86feba74b2c10ff6ed859f11375df87db"]}", code=INVALID_ARGUMENT, version=6.0.5)

V5 working without any problems, please assist here

[ricmoo]

@saccura which network and provider are you using? I’ll look into this asap.

[saccura]

It is private Geth clone, custom contracts.

[ricmoo]

@saccura WebSocketProvider? IpcProvider? JsonRpcProvider? Any additional details are helpful tracking issues down.

[saccura]

WebSocketProvider

[saccura]

Here is my factory provider:

import { JsonRpcProvider, WebSocketProvider } from 'ethers';
import { logger } from '../../common/logger.js';

const ENDPOINTS = {
  'eth': process.env.ENDPOINT_ETH,
  'bnb': process.env.ENDPOINT_BNB,
};

class ETHProviderFactoryClass {
  constructor() {
    this.instances = {};
    this.stateChangeListeners = {};
  }

  async getInstance({ networkId }) {
    const endpoint = ENDPOINTS[networkId];
    if (!endpoint) {
      console.error(`[ETHProviderFactoryClass].getInstance no endpoint for [${networkId}]`);
      return;
    }
    if (this.instances[networkId]) return this.instances[networkId];
    if (ENDPOINTS[networkId].startsWith('http')) {
      this.instances[networkId] = await new JsonRpcProvider(endpoint);
      this.sendCallbacks(networkId, true);
    } else {
      try {
        this.instances[networkId] = await this.connectWS(endpoint, networkId);
      } catch (error) {
        console.error('[ETHProviderFactoryClass].WebSocketProvider', error);
      }
    }
    return this.instances[networkId];
  }

  reConnectWS(endpoint, networkId) {
    setTimeout(async () => {
      try {
        this.instances[networkId] = await this.connectWS(endpoint, networkId);
      } catch (error) {
        //
      }
    }, 1000);
  }

  sendCallbacks(networkId, value) {
    this.stateChangeListeners && this.stateChangeListeners[networkId] && this.stateChangeListeners[networkId].forEach(fn => fn(value));
  }

  onStateChange(fn, networkId) {
    if (!this.stateChangeListeners[networkId]) {
      this.stateChangeListeners[networkId] = [];
    }
    this.stateChangeListeners[networkId].push(fn);

    return () => {
      this.stateChangeListeners[networkId] = this.stateChangeListeners[networkId].filter(l => l !== fn);
    };
  }

  async connectWS(endpoint, networkId) {
    if (this.instances[networkId]) return this.instances[networkId];
    return new Promise(async (resolve, reject) => {
      try {
        const provider = await new WebSocketProvider(endpoint);
        const onClose = provider.websocket.onclose;
        const onOpen = provider.websocket.onopen;
        logger.data(`[connectWS] trying websocket ${endpoint}`);
        provider.websocket.onopen = async event => {
          console.log(`[connectWS].onopen endpoint: [${endpoint}] networkId: [${networkId}] connnected`, provider.ID);
          this.sendCallbacks(networkId, true);
          onOpen && onOpen(event);
          resolve(provider);
          // reject(event);
        };
        provider.websocket.onclose = event => {
          logger.error(`[connectWS].onclose networkId: [${networkId}], code: ${event.code}`);
          reject(event);
          this.instances[networkId] = null;
          this.sendCallbacks(networkId, false);
          onClose && onClose(event);
          this.reConnectWS(endpoint, networkId);
        };
        provider.endpoint = endpoint;
        provider.ID = Math.floor(Math.random() * 10000);
      } catch (ex) {
        logger.exception(`[connectWS] ${ex.message}`, { stack: ex.stack });
        reject();
      }
    });
  }

  free({ networkId }) {
    if (!this.instances[networkId]) return false;
    this.sendCallbacks(networkId, false);
    this.instances[networkId].removeAllListeners();
    delete this.instances[networkId];
  }

  isConnected({ networkId }) {
    return !!this.instances[networkId];
  }
}

export const FabricProviderETH = new ETHProviderFactoryClass();

May be provider.websocket works differently in v6?

[hussamsh]

I am having the exact same issue the others are having with WebSocketProvider. [network=BSC][provider=getblock]

[comunidadio]

Have the same issue as well with QuickNode WebSocket on 6.0.8.
Getting events fine when using QuickNode https provider, but getting the following with wss:

error: Uncaught TypeError: unknown ProviderEvent (argument="event", value="{\"topics\":[\"0x0559884fd3a460db3073b7fc896cc77986f16e378210ded43186175bf646fc5f\"],\"address\":[\"0x4dd6655ad5ed7c06c882f496e3f42ace5766cb89\"]}", code=INVALID_ARGUMENT, version=6.0.8)
    at makeError (file:///Users/XXX/Library/Caches/deno/npm/registry.npmjs.org/ethers/6.0.8/lib.esm/utils/errors.js:109:21)
    at assert (file:///Users/XXX/Library/Caches/deno/npm/registry.npmjs.org/ethers/6.0.8/lib.esm/utils/errors.js:132:15)
    at assertArgument (file:///Users/XXX/Library/Caches/deno/npm/registry.npmjs.org/ethers/6.0.8/lib.esm/utils/errors.js:143:5)
    at getSubscription (file:///Users/XXX/Library/Caches/deno/npm/registry.npmjs.org/ethers/6.0.8/lib.esm/providers/abstract-provider.js:135:5)
    at WebSocketProvider.#hasSub (file:///Users/XXX/Library/Caches/deno/npm/registry.npmjs.org/ethers/6.0.8/lib.esm/providers/abstract-provider.js:866:25)
    at WebSocketProvider.emit (file:///Users/XXX/Library/Caches/deno/npm/registry.npmjs.org/ethers/6.0.8/lib.esm/providers/abstract-provider.js:913:39)
    at SocketEventSubscriber._emit (file:///Users/XXX/Library/Caches/deno/npm/registry.npmjs.org/ethers/6.0.8/lib.esm/providers/provider-socket.js:99:18)
    at SocketEventSubscriber._handleMessage (file:///Users/XXX/Library/Caches/deno/npm/registry.npmjs.org/ethers/6.0.8/lib.esm/providers/provider-socket.js:57:36)
    at WebSocketProvider._processMessage (file:///Users/XXX/Library/Caches/deno/npm/registry.npmjs.org/ethers/6.0.8/lib.esm/providers/provider-socket.js:213:28)
    at WebSocketProvider.websocket.onmessage (file:///Users/XXX/Library/Caches/deno/npm/registry.npmjs.org/ethers/6.0.8/lib.esm/providers/provider-websocket.js:37:18)

[mktcode]

I'm testing something on sepolia and I'm missing the event object in the callback. :(

contract.on("Transfer", async (from, to, tokenId, event) => {
  console.log(event) // undefined :(

[WorkDarwin]

@saccura WebSocketProvider? IpcProvider? JsonRpcProvider? Any additional details are helpful tracking issues down.

In version 6.1, the problem remains, the same error. It does not depend on the provider, in HTTP listening works correctly, and in WSS there is an error on the event: "TypeError: unknown ProviderEvent (argument="event", value="{"topics":["0x..."],"address":["0x..."]}", code=INVALID_ARGUMENT, version=6.1.0)" . Please fix it

[jsaorin]

I also have that problem in version 6.1.0.
With version 5.7.2 it works.

[WorkDarwin]

I also have that problem in version 6.1.0. With version 5.7.2 it works.

Yes, thanks for the information, I know about it. But currently I have migrated a large amount of code to version 6, so there is no way to go back to 5.7.2. Unfortunately, I had to use another library for now. But I believe in developers and I'm waiting for updates!

[shirotech]

This is still happening in 6.2.0, IPC Provider, here is the error message:

TypeError: unknown ProviderEvent (argument="event", value="{\"topics\":[\"0x9902e12af946c468918984c5760caf02072c36782c79c6a797a77665e9c512c3\"],\"address\":[\"xyz>
    at makeError (file:///home/<user>/app/node_modules/ethers/lib.esm/utils/errors.js:109:21)
    at assert (file:///home/<user>/app/node_modules/ethers/lib.esm/utils/errors.js:132:15)
    at assertArgument (file:///home/<user>/app/node_modules/ethers/lib.esm/utils/errors.js:143:5)
    at getSubscription (file:///home/<user>/app/node_modules/ethers/lib.esm/providers/abstract-provider.js:136:5)
    at #hasSub (file:///home/<user>/app/node_modules/ethers/lib.esm/providers/abstract-provider.js:871:25)
    at IpcSocketProvider.emit (file:///home/<user>/app/node_modules/ethers/lib.esm/providers/abstract-provider.js:918:39)
    at SocketEventSubscriber._emit (file:///home/<user>/app/node_modules/ethers/lib.esm/providers/provider-socket.js:109:18)
    at SocketEventSubscriber._handleMessage (file:///home/<user>/app/node_modules/ethers/lib.esm/providers/provider-socket.js:59:36)
    at IpcSocketProvider._processMessage (file:///home/<user>/app/node_modules/ethers/lib.esm/providers/provider-socket.js:225:28)
    at file:///home/<user>/app/node_modules/ethers/lib.esm/providers/provider-ipcsocket.js:38:22 {
  code: 'INVALID_ARGUMENT',
  argument: 'event',
  value: '{"topics":["0x9902e12af946c468918984c5760caf02072c36782c79c6a797a77665e9c512c3"],"address":["xyz"]}'
}

Also it's not a critical error, why even cause an exception that is impossible to try catch, app just crashes for no reason when it can recover if otherwise.

[shirotech]

@ricmoo I have a suggested fix for this in a PR #3922 The issue is that the _event arg was expected to be an object, but it was a string that wasn't parsed or was stringify from somewhere.

[ricmoo]

Sorry. Lost track of this. I will look into it today.

[ricmoo]

Found the single-character bug causing this in the SocketEventSubscriber. I'll get this out shortly. :)

[ricmoo]

This should now be fixed for WebSocketProvider in v6.2.3.

Please try it out and let me know if there are further issues.

Thanks! :)

[ricmoo]

Closing as fixed. But if any further problems occur, let me know.

Thanks! :)

[ArminSm98]

@ricmoo I have issue while listening to PairCreated event in pancakeswap v2 factory, i use JsonRpcProvider, my network is BSC and my ethers version is 5.7.0 ,when i run code nothing happens , i don't get any errors but i don't get new pairs which are created. could you please help me?!
this is my code:
const provider= new ethers.providers.JsonRpcProvider('https://bsc-dataseed.binance.org');
const factoryInterface = ['event PairCreated(address indexed token0, address indexed token1, address pair, uint)',];
const factory = new ethers.Contract(config.addresses.factory, factoryInterface, provider);
async function updateCollections() {
factory.on('PairCreated', async (token0, token1, pairAddress) => {
try {
//handle parameters
} catch (error){
throw new Error(Error updating collections: ${error});
}
});
}

updateCollections();