Add get block eth websocket

cic_syncer/client/evm/response.py

@@ -1,7 +1,11 @@
+import json
+
 from cic_syncer.client import translate
 
+
 translations = {
-        'block_number': 'hex_to_int',
+        'block_number': translate.hex_to_int,
+        'get_block': json.dumps,
         }
 
 
@@ -10,7 +14,7 @@ class EVMResponse:
     def __init__(self, item, response_object):
         self.response_object = response_object
         self.item = item
-        self.fn = getattr(translate, translations[self.item])
+        self.fn = translations[self.item]
 
 
     def get_error(self):

cic_syncer/client/evm/websocket.py

@@ -1,3 +1,4 @@
+import logging
 import uuid
 import json
 
@@ -6,6 +7,7 @@ import websocket
 from .response import EVMResponse
 from cic_syncer.error import RequestError
 
+logg = logging.getLogger()
 
 
 class EVMWebsocketClient:
@@ -35,3 +37,23 @@ class EVMWebsocketClient:
             raise RequestError(err)
 
         return res.get_result()
+
+
+    def get_block_by_integer(self, n):
+        req_id = str(uuid.uuid4())
+        nhx = '0x' + n.to_bytes(8, 'big').hex()
+        req = {
+                'jsonrpc': '2.0',
+                'method': 'eth_getBlockByNumber',
+                'id': str(req_id),
+                'params': [nhx, False],
+                }
+        self.conn.send(json.dumps(req))
+        r = self.conn.recv()
+        res = EVMResponse('get_block', json.loads(r))
+        err = res.get_error()
+        if err != None:
+            raise RequestError(err)
+
+        return res.get_result()
+