add block caching

block.py

@@ -0,0 +1,65 @@
+from web3 import Web3
+from pathlib import Path
+import json
+
+***REMOVED***base_provider = Web3.HTTPProvider(taarush_Node)
+w3 = Web3(base_provider)
+
+cache_directoty = './cache'
+
+class BlockData:
+    def __init__(self, block_number, data, receipts, calls, logs) -> None:
+        self.block_number = block_number
+        self.data = data
+        self.receipts = receipts
+        self.calls = calls
+        self.logs = logs
+        pass
+    
+    def toJSON(self):
+        return json.dumps(self, default=lambda o: o.__dict__, 
+            sort_keys=True, indent=4)
+    
+    def writeJSON(self):
+        json_data = self.toJSON()
+        cache_file = '{cacheDirectory}/{blockNumber}.json'.format(cacheDirectory=cache_directoty, blockNumber=self.block_number)
+        file_exists = Path(cache_file).is_file()
+        if file_exists:
+            f = open(cache_file, "w")
+            f.write(json_data)
+            f.close()
+        else:
+            f = open(cache_file, "x")
+            f.write(json_data)
+            f.close()
+
+
+def createFromBlockNumber(block_number):
+    cache_file = '{cacheDirectory}/{blockNumber}.json'.format(cacheDirectory=cache_directoty, blockNumber=block_number)
+        
+    if (Path(cache_file).is_file()):
+        print("Cache for this block exists, loading again")
+        block_file = open(cache_file)
+        block_json = json.load(block_file)
+        block = BlockData(block_number, block_json['data'], block_json['receipts'], block_json['calls'], block_json['logs'])
+        return block
+    else:
+        print("Cache for this block did not exist, getting data")
+        
+        ## Get block data
+        block_data = w3.eth.get_block(block_number, False)
+        
+        ## Get the block receipts
+        ## TODO: evaluate whether or not this is sufficient or if gas used needs to be converted to a proper big number.
+        ## In inspect-ts it needed to be converted
+        block_receipts_raw = base_provider.make_request("eth_getBlockReceipts", [block_number])
+
+        ## Trace the whole block, return those calls
+        block_calls = w3.parity.trace_block(block_number)
+        
+        ## Get the logs
+        block_hash = (block_data.hash).hex()
+        block_logs = w3.eth.get_logs({'blockHash': block_hash})
+        block = BlockData(block_number, block_data, block_receipts_raw, block_calls, block_logs)
+        block.writeJSON()
+        return block