Truncate extra decimal places from token amount for sending (#12169)

ui/components/ui/token-input/token-input.component.js

@@ -78,8 +78,13 @@ export default class TokenInput extends PureComponent {
   handleChange = (decimalValue) => {
     const { token: { decimals } = {}, onChange } = this.props;
 
+    let newDecimalValue = decimalValue;
+    if (decimals) {
+      newDecimalValue = parseFloat(decimalValue).toFixed(decimals);
+    }
+
     const multiplier = Math.pow(10, Number(decimals || 0));
-    const hexValue = multiplyCurrencies(decimalValue || 0, multiplier, {
+    const hexValue = multiplyCurrencies(newDecimalValue || 0, multiplier, {
       multiplicandBase: 10,
       multiplierBase: 10,
       toNumericBase: 'hex',