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I'm sending a transaction to a contract from Javascript through web3. The transaction is created. The solidity function is (partially) executed because it sends the token it's expected to send... but, values are no stored in a mapping.

I tested with browser-solidity and it works. I tested with https://www.myetherwallet.com and it works. In both cases, I can retrieve the values of the mapping. But when I do through javascript, it doesn't work.

Here is the code of javascript calling function:

  scheduleAppointment : function(_patient, _doctor, _appointmentDateTime) {
    var patientAddress      = document.getElementById("patientInput");
    var doctorAddress       = document.getElementById("doctorInput");
    var appointmentDateTime = document.getElementById("timeStampInput");
    contractInstance.scheduleAppointment.sendTransaction(patientAddress.value,
                                                         doctorAddress.value,
                                                         appointmentDateTime.value,
                                                         {gas:140000, from:web3.eth.accounts[0]});
  }

Here is the code of solidity function (this function does not send tokens, only stores to mapping):

function scheduleAppointment(address _patient, address _doctor, uint _appointmentDateTime) {
    appointmentsList[_patient][_doctor][_appointmentDateTime].appointmentStatus    = 1;
}

As you see, it would be impossible to make it more simple.. but it doesn't work. Transaction is created, but the value is not stored in the mapping.

Should I convert parameters before sending them from javascript? I couldn't find any reference for sending many parameters with sendTransaction. I've tried converting the integer value with parseInt when calling the function with javascript, but it's the same.

Any ideas? Thanks.

1 Answer 1

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I'm sorry, the functions worked properly. The problem was that they run out of gas... I can remove the question if you consider that it does not add anything useful.

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  • It can be helpful to others, missing the correct gas value is a pretty common issue.
    – Ismael
    Oct 19, 2017 at 16:00

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