Backport #6707, #6702 & #6701 (#6713)

* #6707

* Fix default values for address input (#6701)

* #6702

* Remove .only

js/src/api/util/format.js

@@ -75,7 +75,13 @@ export function bytesToAscii (bytes) {
 }
 
 export function asciiToHex (string) {
-  return '0x' + string.split('').map((s) => s.charCodeAt(0).toString(16)).join('');
+  let result = '0x';
+
+  for (let i = 0; i < string.length; ++i) {
+    result += ('0' + string.charCodeAt(i).toString(16)).substr(-2);
+  }
+
+  return result;
 }
 
 export function padRight (input, length) {