src/pqc_federated_learning/errors.py
| 1 | """Exception hierarchy for pqc-federated-learning.""" |
| 2 | |
| 3 | from __future__ import annotations |
| 4 | |
| 5 | |
| 6 | class FLError(Exception): |
| 7 | """Base exception for all pqc-federated-learning errors.""" |
| 8 | |
| 9 | |
| 10 | class InvalidUpdateError(FLError): |
| 11 | """Raised when a client update is structurally invalid.""" |
| 12 | |
| 13 | |
| 14 | class SignatureVerificationError(FLError): |
| 15 | """Raised when a client update's signature fails to verify.""" |
| 16 | |
| 17 | |
| 18 | class AggregationError(FLError): |
| 19 | """Raised when aggregation cannot proceed (e.g., round/model mismatch).""" |
| 20 | |
| 21 | |
| 22 | class UntrustedClientError(FLError): |
| 23 | """Raised when a client update is signed by a DID not in the trusted set.""" |
| 24 | |
| 25 | |
| 26 | class ShapeMismatchError(FLError): |
| 27 | """Raised when client tensors disagree on names or shapes.""" |
| 28 | |
| 29 | |
| 30 | class InsufficientUpdatesError(FLError): |
| 31 | """Raised when fewer than `min_updates` valid updates are available.""" |
| 32 | |