eth_chainId called on every rpc call with WebSocketProvider

[qqqllppp]

Ethers Version

6.8.0

Search Terms

WebSocketProvider, eth_chainId

Describe the Problem

eth_chainId is being called on every eth_call type rpc call with WebSocketProvider. This is very wasteful on third-party node provider. Running in NodeJS environment. I have read all the eth_chainId related issues in ethersjs but no luck.

Code Snippet

import { Contract, WebSocketProvider } from "ethers";

const provider = new WebSocketProvider(
    `THIRD_PARTY_WSS_URL`,
    1
  );

const ct = new Contract(
    "0xb4e16d0168e52d35cacd2c6185b44281ec28c9dc",
    abi,
    provider
);

await ct.getReserves(); 
// An example of an eth_call method call. 
// Third-party node provider registers both eth_chainId and eth_call 
// every time the method is called. I only want eth_call to be registered.

Contract ABI

[
{
    "constant": true,
    "inputs": [],
    "name": "getReserves",
    "outputs": [
      { "internalType": "uint112", "name": "_reserve0", "type": "uint112" },
      { "internalType": "uint112", "name": "_reserve1", "type": "uint112" },
      {
        "internalType": "uint32",
        "name": "_blockTimestampLast",
        "type": "uint32"
      }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
]

Errors

No response

Environment

Ethereum (mainnet/ropsten/rinkeby/goerli), node.js (v12 or newer)

Environment (Other)

No response

[ricmoo]

Agreed, I thought I had made that change before, but maybe that was in a previous version or an experimental branch.

I’m adding automatic re-subscription currently, and I think it makes sense to only request chain ID on a when the WebSocket connection is not over the same transport instance; so on initial connection, on re-connect and the intermediate getLogs calls between disconnect and re-connect to backfill the intermediate events before resuming the filter events.

[ricmoo]

This has been fixed in 6.9.0 along with a few other useful staticNetwork features, such as passing true to auto-detect the network, but then prevent future calls.

Please try it out and let me know if you have any issues.

Thanks! :)