refactor!: new encoding for static value types (not arrays [])

docs/classes/ERC725.md

@@ -275,6 +275,23 @@ When encoding JSON, it is possible to pass in the JSON object and the URL where
 
 :::
 
+:::info
+
+When encoding some values using specific `string` or `bytesN` as `valueType`, if the data passed is a non-hex value, _erc725.js_ will convert the value
+to its utf8-hex representation for you. For instance:
+
+- If `valueType` is `string` and you provide a `number` as input.
+
+_Example: input `42` --> will encode as `0x3432` (utf-8 hex code for `4` = `0x34`, for `2` = `0x32`)._
+
+- If `valueType` is `bytes32` or `bytes4`, it will convert as follow:
+
+_Example 1: input `week` encoded as `bytes4` --> will encode as `0x7765656b`._
+
+_Example 2: input `1122334455` encoded as `bytes4` --> will encode as `0x42e576f7`._
+
+:::
+
 #### Parameters
 
 ##### 1. `data` - Array of Objects

src/lib/decodeMappingKey.ts

@@ -23,10 +23,6 @@ import { decodeValueType } from './encoder';
 import { ERC725JSONSchema } from '../types/ERC725JSONSchema';
 import { DynamicKeyPart } from '../types/dynamicKeys';
 
-function make32BytesLong(s: string): string {
-  return padLeft(s, 64);
-}
-
 function isDynamicKeyPart(keyPartName: string): boolean {
   return (
     keyPartName.slice(0, 1) === '<' &&
@@ -59,7 +55,14 @@ function decodeKeyPart(
         ? 0
         : encodedKeyPart.length - bytesLength;
     decodedKey = encodedKeyPart.slice(sliceFrom);
-  } else decodedKey = decodeValueType(type, make32BytesLong(encodedKeyPart));
+  } else if (type === 'address') {
+    // this is required if the 2nd word is an address in a MappingWithGrouping
+    const leftPaddedAddress = padLeft('0x' + encodedKeyPart, 40);
+
+    decodedKey = decodeValueType(type, leftPaddedAddress);
+  } else {
+    decodedKey = decodeValueType(type, encodedKeyPart);
+  }
 
   return { type, value: decodedKey };
 }