Added Centrifuge type registry

Author: Arjan Zijderveld

scalecodec/type_registry/centrifuge.json

@@ -0,0 +1,38 @@
+{
+  "runtime_id": 198,
+  "types": {
+    "BlockNumber": "u32",
+    "Index": "u64",
+    "Keys": {
+      "type": "struct",
+      "type_mapping": [
+         ["grandpa", "AccountId"],
+         ["babe", "AccountId"],
+         ["im_online", "AccountId"],
+         ["authority_discovery", "AccountId"]
+      ]
+    },
+    "Fee<Hash, Balance>": {
+      "type": "struct",
+      "type_mapping": [
+         ["key", "Hash"],
+         ["price", "Balance"]
+      ]
+    },
+    "PreCommitData<Hash, AccountId, BlockNumber>": {
+      "type": "struct",
+      "type_mapping": [
+         ["signing_root", "Hash"],
+         ["identity", "AccountId"],
+         ["expiration_block", "BlockNumber"]
+      ]
+    },
+    "Proof": {
+      "type": "struct",
+      "type_mapping": [
+         ["leaf_hash", "H256"],
+         ["sorted_hashes", "Vec<H256>"]
+      ]
+    }
+  }
+}

scalecodec/types.py

@@ -425,6 +425,18 @@ def process_encode(self, value):
         return ScaleBytes(value)
 
 
+class VecU8Length20(ScaleType):
+    type_string = '[u8; 20]'
+
+    def process(self):
+        return '0x{}'.format(self.get_next_bytes(20).hex())
+
+    def process_encode(self, value):
+        if value[0:2] != '0x' and len(value) == 42:
+            raise ValueError('Value should start with "0x" and should be 20 bytes long')
+        return ScaleBytes(value)
+
+
 class VecU8Length16(ScaleType):
     type_string = '[u8; 16]'
 
@@ -489,6 +501,25 @@ def process_encode(self, value):
         return ScaleBytes(value)
 
 
+class VecH256Length3(ScaleType):
+    type_string = '[H256; 3]'
+
+    def process(self):
+        return [self.process_type('H256').value, self.process_type('H256').value, self.process_type('H256').value]
+
+    def process_encode(self, value):
+        if type(value) is not list:
+            raise ValueError("Provided value is not a list")
+
+        data = None
+
+        for element in value:
+            element_obj = self.get_decoder_class('H256', metadata=self.metadata)
+            data += element_obj.encode(element)
+
+        return data
+
+
 class Struct(ScaleType):
 
     def __init__(self, data, type_mapping=None, **kwargs):
@@ -782,18 +813,10 @@ class BalanceOf(Balance):
     pass
 
 
-class BlockNumber(U64):
-    pass
-
-
 class NewAccountOutcome(CompactU32):
     type_string = 'NewAccountOutcome'
 
 
-class Index(U64):
-    pass
-
-
 class Vec(ScaleType):
 
     def __init__(self, data=None, **kwargs):

setup.py

@@ -43,7 +43,7 @@
     # For a discussion on single-sourcing the version across setup.py and the
     # project code, see
     # https://packaging.python.org/en/latest/single_source_version.html
-    version='0.9.8',  # Required
+    version='0.9.9',  # Required
 
     # This is a one-line description or tagline of what your project does. This
     # corresponds to the "Summary" metadata field:

test/test_scale_types.py

@@ -52,6 +52,11 @@ def test_compact_u32_remaining_bytes(self):
         obj = ScaleDecoder.get_decoder_class('Compact<u32>', ScaleBytes("0x02093d0001"))
         self.assertRaises(RemainingScaleBytesNotEmptyException, obj.decode)
 
+    def test_compact_u32_invalid(self):
+        obj = ScaleDecoder.get_decoder_class('Compact<u32>', ScaleBytes("0x"))
+        self.assertRaises(InvalidScaleTypeValueException, obj.decode)
+
+
     def test_u16(self):
         obj = ScaleDecoder.get_decoder_class('u16', ScaleBytes("0x2efb"))
         obj.decode()