fix: Refactoring decoding output class and adding decoding valid CIDv…

…1 test.

README.md

@@ -59,9 +59,9 @@ we would get access to the following info.
 ```dart
 {
     "code": 0x12, 
-    "length": 32,
-    "digest": [165, 145, 166, 212, 11, 244, 32, 64, 74, 1, 23, 51, 207, 183, 177, 144, 214, 44, 101, 191, 11, 205, 163, 43, 87, 178, 119, 217, 173, 159, 20, 110],
     "name": "sha2-256",
+    "size": 32,
+    "digest": [165, 145, 166, 212, 11, 244, 32, 64, 74, 1, 23, 51, 207, 183, 177, 144, 214, 44, 101, 191, 11, 205, 163, 43, 87, 178, 119, 217, 173, 159, 20, 110],
 }
 ```
 

lib/src/multihash.dart

@@ -15,7 +15,7 @@ class Multihash {
     }
 
     // Function convention info
-    Codec hashInfo = codecTable.firstWhere((obj) => obj.name == hashType);
+    MultiCodec hashInfo = codecTable.firstWhere((obj) => obj.name == hashType);
 
     // Check if length of digest is correctly defined.
     length ??= digest.length;
@@ -34,6 +34,7 @@ class Multihash {
   }
 
   /// Decodes an array of bytes into a multihash object.
+  /// See https://cid.ipfs.tech/#bafybeigdyrzt5sfp7udm7hu76uh7y26nf3efuylqabf3oclgtqy55fbzdi to better understand what each varint means.
   static MultihashInfo decode(Uint8List bytes) {
     // Check if the array of bytes is long enough
     // (has to have hash function type, length of digest and digest)
@@ -64,6 +65,6 @@ class Multihash {
     // Fetch name of hash function type referring to the code
     String hashName = codecTable.firstWhere((obj) => obj.code == decodedCode.res).name;
 
-    return MultihashInfo(code: decodedCode.res, length: decodedLen.res, name: hashName, digest: bytes);
+    return MultihashInfo(code: decodedCode.res, size: decodedLen.res, name: hashName, digest: bytes);
   }
 }