$(document).on("click", "#confirm", function () {

  contract.methods.createDigitalArtFee().call().then(function (val) {
    contract.methods.mintDigitalArt(imageHash)
      .send({ from: userAccount, value: val })
      .on("transactionHash", function (_receipt) {
        clearImage();
        bootbox.alert("Now your digital art is being published. txhash:" + _receipt);
      })
      .on("receipt", function (_receipt) {
      })
      .on("error", function (_error) {
        console.log(_error);
      })
  });
});