1

I have written a contract with the hub/factory pattern in which I need to capture the address of the contract that is being created, for this I am using events.

Contract A

Function A1

-- Call to Function B1

--- emit event Contract B

Contract B

Function B1

-- Actions

However, I try making an event with a single contract and it works perfectly, I receive the receipt with the associated events and the resulting elements.

I uploaded to my repository the code I'm using, the contract in question is as follows

https://github.com/DanielZambranoC/Capachain/blob/master/bc/contracts/Capachain.sol

As you can see in line 11 I have changed the content of the event to 'daniel' proving that it was not a problem with the address I was sending, basically I need to return the contract address that was created to the front end to notify the user.

I am using web3js in its version 1.0.0 beta 36 and 55 with my application

In Remix I can see that the log returns the events raised, but I have not managed to capture them from my application.

Issues on Github

https://github.com/ethereum/web3.js/issues/2853 https://github.com/ethereum/solidity/issues/6877

In the test with only 1 contract you can see that I have the key/value structure of the event, name with their respective values.

In the test with the hub/factory contracts you can see what comes if the events, if I send 2, send me 2 arrays but without content but with raw data, I think that if I sent 100 events, they would sell the 100 array but without information.

Result with 1 Contract

{
  "transactionHash": "0xdaf5eec6c4b5a767d1d6c4e5ca23b80afcba91b889731358ab0a27c706b981f6",
  "transactionIndex": 0,
  "blockHash": "0x1b43bd4ebf57105be29bbbdb80b2b9d12c041fb60b014cdb6d08db46e628353e",
  "blockNumber": 178,
  "from": "0x3377b79a500b6d4a8e2e391b86ebc7f88e99f2c4",
  "to": "0xc3e0cb472f5763a34472afcd546fcce4231a950a",
  "gasUsed": 23031,
  "cumulativeGasUsed": 23031,
  "contractAddress": null,
  "status": true,
  "logsBloom": "0x00000000010000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000800000000000000020000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000",
  "v": "0x1c",
  "r": "0xcfe3006057312a461cb0c52c6786eee4f46df6d720da92581e28ec5dab5382f0",
  "s": "0x3d42b3dcc12aa4b902bcdceec6ef1333460ffa8798ef991bcb202a769d173a20",
  "events": {
    "RegistroQueja": {
      "logIndex": 0,
      "transactionIndex": 0,
      "transactionHash": "0xdaf5eec6c4b5a767d1d6c4e5ca23b80afcba91b889731358ab0a27c706b981f6",
      "blockHash": "0x1b43bd4ebf57105be29bbbdb80b2b9d12c041fb60b014cdb6d08db46e628353e",
      "blockNumber": 178,
      "address": "0xC3E0CB472f5763A34472AfCd546FCCe4231A950a",
      "type": "mined",
      "id": "log_2191ede5",
      "returnValues": {
        "0": "test",
        "nomre": "test"
      },
      "event": "RegistroQueja",
      "signature": "0x4704303a8919b51a4c52e7794ce51a432970e0b441ef60bf5283fe4520dc5308",
      "raw": {
        "data": "0x000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000047465737400000000000000000000000000000000000000000000000000000000",
        "topics": [
          "0x4704303a8919b51a4c52e7794ce51a432970e0b441ef60bf5283fe4520dc5308"
        ]
      }
    }
  }
}

Result with Hub/Factory Contract

{
  "transactionHash": "0x41bb7b355a3c08d0ae99ae7ccad38c2877688fe97da4d773e70a139c5e246c5a",
  "transactionIndex": 0,
  "blockHash": "0xca5049734f587fcd21c80d531433a961365f5778c25a78b861820f9a166ba5c1",
  "blockNumber": 177,
  "from": "0x3377b79a500b6d4a8e2e391b86ebc7f88e99f2c4",
  "to": "0xbf62861d2ab3c1fc05098f71b97886c050fff0b6",
  "gasUsed": 753055,
  "cumulativeGasUsed": 753055,
  "contractAddress": null,
  "status": true,
  "logsBloom": "0x00000000010000000000000200000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000200000000000100000000000000000000000000000000001000000000000000400000000000010000000020000000000000001000000000000000000000000000000000000000000000000000000002000000000000000000800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
  "v": "0x1b",
  "r": "0x5ea7230a484061a85cfea0276597f4cb07be1e866aa7828a6f54ea766c4d8faa",
  "s": "0x2f74d47b31216caf8b3314e34834355f54e61fdb3641662a4e2477a375c18add",
  "events": {
    "0": {
      "logIndex": 0,
      "transactionIndex": 0,
      "transactionHash": "0x41bb7b355a3c08d0ae99ae7ccad38c2877688fe97da4d773e70a139c5e246c5a",
      "blockHash": "0xca5049734f587fcd21c80d531433a961365f5778c25a78b861820f9a166ba5c1",
      "blockNumber": 177,
      "address": "0x7bEf0Ce786E1610f9a962C522A5B16b5C8FDbf70",
      "type": "mined",
      "id": "log_4f962706",
      "returnValues": {},
      "signature": null,
      "raw": {
        "data": "0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000664616e69656c0000000000000000000000000000000000000000000000000000",
        "topics": [
          "0xabf569c29023498f9292dbb4f02d15221cbfeb36d71a45c619158c2f2c8b91f4"
        ]
      }
    },
    "1": {
      "logIndex": 1,
      "transactionIndex": 0,
      "transactionHash": "0x41bb7b355a3c08d0ae99ae7ccad38c2877688fe97da4d773e70a139c5e246c5a",
      "blockHash": "0xca5049734f587fcd21c80d531433a961365f5778c25a78b861820f9a166ba5c1",
      "blockNumber": 177,
      "address": "0xbf62861D2aB3C1fc05098f71b97886c050Fff0b6",
      "type": "mined",
      "id": "log_ce96a782",
      "returnValues": {},
      "signature": null,
      "raw": {
        "data": "0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000664616e69656c0000000000000000000000000000000000000000000000000000",
        "topics": [
          "0x4704303a8919b51a4c52e7794ce51a432970e0b441ef60bf5283fe4520dc5308"
        ]
      }
    }
  }
}
|improve this question
0

I'm not sure I understand the question. 

    event RegistroQueja(address contrato);

    function registrarQueja(string memory _descripcion, string memory _nombre, string memory _correo, string memory _fecha) public {
        address contrato = address(new Queja(_descripcion, _nombre, _correo, _fecha));
        contratos.push(contrato);
        emit RegistroQueja(contrato);

You can listen the factory's event log.

Hope it helps.

|improve this answer
  • Hi, thanks for answer... Thats right when using 1 contract pattern, when using factory just getting rawdata in the event log (in post you can see both json returns from each pattern) I am using this to get the receipt: await factory.methods.register registrarQueja(this.state.description,this.state.name,this.state.mail,this.state.date).send({ from: accounts[0] }).on('receipt', function(receipt){ console.log(receipt); }) – Daniel Zambrano Capecci Jun 1 '19 at 14:12
  • I have posted the same issue in web3 and solidity github github.com/ethereum/web3.js/issues/2853 and github.com/ethereum/solidity/issues/6877 – Daniel Zambrano Capecci Jun 1 '19 at 14:13

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.