functional_tests: Python epee binary lib and test /get_blocks.bin

Co-authored-by: selsta <selsta@sent.at>

utils/python-rpc/framework/daemon.py

@@ -29,8 +29,18 @@
 
 """Daemon class to make rpc calls and store state."""
 
+from . import epee_binary
 from .rpc import JSONRPC 
 
+class DaemonBinary:
+    @staticmethod
+    def hash_list_to_blob(hash_list):
+        blob = bytes()
+        for h in hash_list:
+            assert len(h) == 64
+            blob += bytes.fromhex(h)
+        return blob
+
 class Daemon(object):
 
     def __init__(self, protocol='http', host='127.0.0.1', port=0, idx=0, restricted_rpc = False, username=None, password=None):
@@ -179,6 +189,24 @@ class Daemon(object):
         return self.rpc.send_json_rpc_request(getblockheadersrange)
     get_block_headers_range = getblockheadersrange
 
+    def get_blocks_fast(self, start_height, block_ids, requested_info = 0,
+            pool_info_since = 0, prune = True, no_miner_tx = False,
+            max_block_count = 0, block_ids_exclusive = False):
+        get_blocks_fast = {
+            'requested_info': requested_info,
+            'block_ids': DaemonBinary.hash_list_to_blob(block_ids),
+            'start_height': start_height,
+            'prune': prune,
+            'no_miner_tx': no_miner_tx,
+            'block_ids_exclusive': block_ids_exclusive,
+            'pool_info_since': pool_info_since,
+            'max_block_count': max_block_count
+        }
+        res = self.rpc.send_binary_request("/getblocks.bin", get_blocks_fast)
+        if 'top_block_hash' in res:
+            res['top_block_hash'] = res['top_block_hash'].hex()
+        return res
+
     def get_connections(self, client = ""):
         get_connections = {
             'client': client,