Subnet Mechanism logic

bittensor/core/chain_data/metagraph_info.py

@@ -1,14 +1,17 @@
-from enum import Enum
-
 from dataclasses import dataclass
+from enum import Enum
 from typing import Optional, Union
 from bittensor.core import settings
 from bittensor.core.chain_data.axon_info import AxonInfo
 from bittensor.core.chain_data.chain_identity import ChainIdentity
 from bittensor.core.chain_data.info_base import InfoBase
 from bittensor.core.chain_data.subnet_identity import SubnetIdentity
 from bittensor.core.chain_data.utils import decode_account_id
-from bittensor.utils import u64_normalized_float as u64tf, u16_normalized_float as u16tf
+from bittensor.utils import (
+    get_netuid_and_mechid_by_storage_index,
+    u64_normalized_float as u64tf,
+    u16_normalized_float as u16tf,
+)
 from bittensor.utils.balance import Balance, fixed_to_float
 
 
@@ -170,11 +173,13 @@ class MetagraphInfo(InfoBase):
 
     commitments: Optional[tuple[tuple[str, str]]]
 
+    mechid: int = 0
+
     @classmethod
     def _from_dict(cls, decoded: dict) -> "MetagraphInfo":
         """Returns a MetagraphInfo object from decoded chain data."""
         # Subnet index
-        _netuid = decoded["netuid"]
+        _netuid, _mechid = get_netuid_and_mechid_by_storage_index(decoded["netuid"])
 
         # Name and symbol
         if name := decoded.get("name"):
@@ -198,6 +203,7 @@ def _from_dict(cls, decoded: dict) -> "MetagraphInfo":
         return cls(
             # Subnet index
             netuid=_netuid,
+            mechid=_mechid,
             # Name and symbol
             name=decoded["name"],
             symbol=decoded["symbol"],
@@ -394,7 +400,7 @@ def _from_dict(cls, decoded: dict) -> "MetagraphInfo":
                 else None
             ),
             validators=[v for v in decoded["validators"]]
-            if decoded.get("validators") is not None
+            if decoded.get("validators")
             else None,
             commitments=get_selective_metagraph_commitments(decoded),
         )

bittensor/core/errors.py

@@ -159,7 +159,7 @@ class NotDelegateError(StakeError):
     """
 
 
-class SubNetworkDoesNotExist(ChainTransactionError):
+class SubnetNotExists(ChainTransactionError):
     """
     The subnet does not exist.
     """

bittensor/core/extrinsics/asyncex/children.py

@@ -44,7 +44,7 @@ async def set_children_extrinsic(
         NotEnoughStakeToSetChildkeys: Parent key doesn't have minimum own stake.
         ProportionOverflow: The sum of the proportions does exceed uint64.
         RegistrationNotPermittedOnRootSubnet: Attempting to register a child on the root network.
-        SubNetworkDoesNotExist: Attempting to register to a non-existent network.
+        SubnetNotExists: Attempting to register to a non-existent network.
         TooManyChildren: Too many children in request.
         TxRateLimitExceeded: Hotkey hit the rate limit.
         bittensor_wallet.errors.KeyFileError: Failed to decode keyfile data.