>Gas price (GWei):</label>
            <input id="value" type="number" class="form-control" ng-model="gasPrice" step="any" min="0" ng-change="calculateFee()" 
                max="999999999999999" required >
        </div>
        <div class="form-group">
            <label for="value">Tx fees (ETH):</label>
            <input id="value" disabled type="number" class="form-control" ng-model="txFee" step="any" min="0" max="999999999999999" required >
        </div>
    </div>
    <div class="modal-footer">
  