getPastEvents fails when called with 'allEvents'

[marcscherer]

when using the following code in beta.48 returns the error below. It worked fine in beta.47. Changing "allEvents" to a certain event will also work.

```web3Contract.getPastEvents('allEvents', {
        fromBlock: startBlock,
        toBlock: endBlock,
    });
```

Error: Empty outputs array given!
    at AbiCoder.decodeParameters (C:\Projects\myproj\node_modules\web3-eth-abi\dist\web3-eth-abi.cjs.js:61:15)
    at AbiCoder.decodeLog (C:\Projects\myproj\node_modules\web3-eth-abi\dist\web3-eth-abi.cjs.js:123:27)
    at AllEventsLogDecoder.decode (C:\Projects\myproj\node_modules\web3-eth-contract\dist\web3-eth-contract.cjs.js:246:45)
    at AllEventsLogDecoder.decode (C:\Projects\myproj\node_modules\web3-eth-contract\dist\web3-eth-contract.cjs.js:276:85)
    at C:\Projects\myproj\node_modules\web3-eth-contract\dist\web3-eth-contract.cjs.js:831:43
    at Array.map (<anonymous>)
    at AllPastEventLogsMethod.afterExecution (C:\Projects\myproj\node_modules\web3-eth-contract\dist\web3-eth-contract.cjs.js:830:28)
    at AllPastEventLogsMethod._callee$ (C:\Projects\myproj\node_modules\web3-core-method\dist\web3-core-method.cjs.js:354:35)
    at tryCatch (C:\Projects\myproj\node_modules\regenerator-runtime\runtime.js:62:40)
    at Generator.invoke [as _invoke] (C:\Projects\myproj\node_modules\regenerator-runtime\runtime.js:288:22)
    at Generator.prototype.(anonymous function) [as next] (C:\Projects\myproj\node_modules\regenerator-runtime\runtime.js:114:21)
    at asyncGeneratorStep (C:\Projects\myproj\node_modules\@babel\runtime\helpers\asyncToGenerator.js:3:24)
    at _next (C:\Projects\myproj\node_modules\@babel\runtime\helpers\asyncToGenerator.js:25:9)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:189:7)

Versions

• web3.js: beta.48

[nivida]

There was a similar issue regarding the getPastEvents method. I will check if this already got solved but not released.

[davekaj]

I'm getting a similar failure. My error is:

(node:97348) UnhandledPromiseRejectionWarning: Error: Empty outputs array given!
    at AbiCoder.decodeParameters (/Users/davidkajpust/coding-no-icloud-backup/thegraph/research/soho-token-contracts/contracts/subgraph/node_modules/web3-eth-abi/dist/web3-eth-abi.cjs.js:61:15)
    at AbiCoder.decodeLog (/Users/davidkajpust/coding-no-icloud-backup/thegraph/research/soho-token-contracts/contracts/subgraph/node_modules/web3-eth-abi/dist/web3-eth-abi.cjs.js:123:27)
.....

For me, I am making a pretty typical web3 transaction:

let test = gns.methods.registerDomain('Compound', governor).send({ from: governor })

And it actually works, and the tx is successful as seen in ganache logs. The solidity function is:

    function registerDomain (string calldata _domainName, address _owner) external onlyGovernance {
        gnsDomains[keccak256(abi.encodePacked(_domainName))] = Domain({owner: _owner});
        emit domainAdded(_domainName, keccak256(abi.encodePacked(_domainName)), _owner);
    }

The abi of the function is:

    {
      "constant": false,
      "inputs": [
        {
          "name": "_domainName",
          "type": "string"
        },
        {
          "name": "_owner",
          "type": "address"
        }
      ],
      "name": "registerDomain",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },

I think it has to do with outputs of the abi function being an empty array. Is it possible there was an upgrade to the solc compiler, that changed outputs, and now this is causing an error in web3js?

[nivida]

@davekaj Thanks for the additional information! I will check and fix this asap.

[nivida]

This got fixed with PR #2458.