multicall error response data is empty, useCall error is undefined

I am calling useCall on moonbaseAlpha chain, it is using their multicall contract defined in useDapp code. When the function returns error, I get error thrown in browser console from rpc, I also get error code in rpc response payload, but useCall doesn’t return any error

rpc response:

{"jsonrpc":"2.0","error":{"code":-32603,"message":"VM Exception while processing transaction: revert","data":""},"id":100}

Browser error:

Error: missing revert data in call exception; Transaction reverted without a reason string [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ] (error={"reason":"processing response error","code":"SERVER_ERROR","body":"{\"jsonrpc\":\"2.0\",\"error\":{\"code\":-32603,\"message\":\"VM Exception while processing transaction: revert\",\"data\":\"\"},\"id\":85}\n","error":{"code":-32603,"data":""},"requestBody":"{\"method\":\"eth_call\",\"params\":[{\"to\":\"0x4e2cfca20580747adba58cd677a998f8b261fc21\",\"data\":\"0x252dba42000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000001c0000000000000000000000000000000000000000000000000000000000000026000000000000000000000000093dceea2e035090f4b18b0723cfa456423814bfb00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000024ffc9896b000000000000000000000000fbea1b97406c6945d07f50f588e54144ea8b684f0000000000000000000000000000000000000000000000000000000000000000000000000000000093dceea2e035090f4b18b0723cfa456423814bfb00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000024f2b0a55d000000000000000000000000000000000000000000000000000000000000592900000000000000000000000000000000000000000000000000000000000000000000000000000000ffffffffd2aad7f60626608fa4a5d34768f7892d0000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000002470a08231000000000000000000000000fbea1b97406c6945d07f50f588e54144ea8b684f0000000000000000000000000000000000000000000000000000000000000000000000000000000093dceea2e035090f4b18b0723cfa456423814bfb00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000024c0ea1f11000000000000000000000000000000000000000000000000000000000000592900000000000000000000000000000000000000000000000000000000\"},\"0x202577\"],\"id\":85,\"jsonrpc\":\"2.0\"}","requestMethod":"POST","url":"https://rpc.api.moonbase.moonbeam.network/"}, data="0x", code=CALL_EXCEPTION, version=providers/5.6.4)
    at Logger.makeError (index.js?dd68:219:1)
    at Logger.throwError (index.js?dd68:228:1)
    at checkError (json-rpc-provider.js?8679:59:1)
    at JsonRpcProvider.eval (json-rpc-provider.js?8679:518:1)
    at Generator.throw (<anonymous>)
    at rejected (json-rpc-provider.js?8679:6:42)

and yet error is undefined returned from useCall

[maoueh]

@mj426382 Seeing the same behavior, the real problem is not why the call failed, it’s that useCall does not report the error properly and as such, there is no way to inform the user that something went wrong.

[rzadp]

We’re working on detecting the actual error better. (Note that it will properly work only with Multicall v2).

cc @jakvbs

this problem is not consistent

we will see the error mentioned by Yuripetusko periodically

This makes the problem difficult, so as much info as possible is appreciated.

@heycryptobob Is the problem also happening periodically and not consistently? Do you see any pattern?