Probleme beim Senden von Rohtransaktionen zum Aufrufen von Smart-Contract-Methoden?

 let provider_url = 
"https://ropsten.infura.io/v3/d5bca90ec3084aee8abd468fdf876a11";

this.web3Provider = new Web3.providers.HttpProvider(provider_url);
window.web3_ = new Web3(this.web3Provider);

let account = "0x25bA673A96acadD7A02f4c5834Ba80C1AF6b7758";

          let nonce = window.web3_.toHex(window.web3_.eth.getTransactionCount(account));

          let myPrivateKey = "****";

          let privateKey = new Buffer(myPrivateKey, "hex");
          let functionName = "markAttendance";
          let types = ["address", "uint", "uint256"];
          let args = [attendeeAddress, opinion, date];
          let fullName = functionName + "(" + types.join() + ")";
          let signature = CryptoJS.SHA3(fullName, {outputLength: 256}).toString(CryptoJS.enc.Hex).slice(0, 8);
          let dataHex = signature + coder.encodeParams(types, args);
          let data = "0x" + dataHex;
          // let nonce = web3.toHex();
          let gasPrice = window.web3_.toHex(20000000000); // 20 Gwei
          let gasLimitHex = window.web3_.toHex(4700000);

          let rawTx = {
            'nonce': nonce,
            'gasPrice': gasPrice,
            'gasLimit': gasLimitHex,
            'from': account,
            'to': '0xf77c958bdffee94c3f53eb763cffd646cde336d9', 
            'data': data,
            'value': window.web3_.toHex(window.web3_.toWei("0.5", "ether")),
          }
          let tx = new Tx(rawTx);
          tx.sign(privateKey);
          tx.serialize();
          console.log(tx.validate());
          let serializedTx = '0x' + tx.serialize().toString('hex');
          console.log(serializedTx);
window.web3_.eth.sendRawTransaction(serializedTx, function (err, txHash) {
  console.log(err, txHash)
})

Vertrag

contract MarkAttendance {

struct AttendeeDetails {
    address attendance_giver;
    address attendee;
    uint attendance_opinion;
    uint256 timestamp;
    uint256 date_of_attendance;
}

//mapping of structure  for storing the attendeeDetails
mapping(uint => AttendeeDetails) public attendeeDetails;
uint public attendeeDetailsCount;

function markAttendance(address _attendee, uint _attendance_opinion, uint256 _date) public {
    attendeeDetailsCount ++;
    attendeeDetails[attendeeDetailsCount] = AttendeeDetails(msg.sender, _attendee, _attendance_opinion, now, _date);
    }
}

Ich erhalte TXHASH, aber die Transaktion wird jedes Mal abgebrochen. Was könnte das Problem sein, das ich mache? kann mir jemand eine Lösung dafür vorschlagen.

Es funktioniert gut, wenn ich die Methode von der Truffle-Konsole aus aufrufe. Ich erhalte eine erfolgreiche Transaktionsquittung.

Bitte finden Sie den Screenshot