1  //! Core library errors.
 2  
 3  use crate::mls_crypto;
 4  
 5  #[derive(Debug, thiserror::Error)]
 6  pub enum CoreError {
 7      /// Identity error.
 8      #[error("Identity error: {0}")]
 9      IdentityError(#[from] mls_crypto::IdentityError),
10  
11      /// MLS service error.
12      #[error("MLS error: {0}")]
13      MlsServiceError(#[from] mls_crypto::MlsServiceError),
14  
15      /// Storage error.
16      #[error("Storage error: {0}")]
17      StorageError(#[from] mls_crypto::StorageError),
18  
19      #[error("Consensus error: {0}")]
20      ConsensusError(#[from] hashgraph_like_consensus::error::ConsensusError),
21  
22      #[error("System time error: {0}")]
23      SystemTimeError(#[from] std::time::SystemTimeError),
24  
25      /// Message encoding/decoding error.
26      #[error("Message error: {0}")]
27      MessageError(#[from] prost::DecodeError),
28  
29      /// JSON error.
30      #[error("JSON error: {0}")]
31      JsonError(#[from] serde_json::Error),
32  
33      /// MLS group is not initialized for this handle.
34      #[error("MLS group not initialized")]
35      MlsGroupNotInitialized,
36  
37      /// Steward is not set for this group handle.
38      #[error("Steward not set")]
39      StewardNotSet,
40  
41      /// No proposals available for the requested operation.
42      #[error("No proposals available")]
43      NoProposals,
44  
45      #[error("Invalid group update request")]
46      InvalidGroupUpdateRequest,
47  
48      #[error("Invalid subtopic: {0}")]
49      InvalidSubtopic(String),
50  
51      /// Emergency criteria proposals found in approved queue during batch creation.
52      /// This indicates a bug: emergency proposals should be removed by
53      /// apply_consensus_result before create_batch_proposals is called.
54      #[error(
55          "Emergency criteria proposals found in approved queue (ids: {proposal_ids:?}). \
56           They should have been removed by apply_consensus_result."
57      )]
58      UnexpectedEmergencyProposals { proposal_ids: Vec<u32> },
59  
60      /// The consensus outcome does not match the handle's ownership state.
61      /// For example, `ApprovedOwner` was passed but the handle does not own the proposal,
62      /// or `Approved { payload }` was passed but the handle does own it.
63      #[error("Invalid consensus outcome: {0}")]
64      InvalidConsensusOutcome(String),
65  
66      /// The proposal ID was not found in the handle's voting or approved proposals.
67      #[error("Proposal not found: {0}")]
68      ProposalNotFound(u32),
69  }
70  
71  impl From<mls_crypto::MlsError> for CoreError {
72      fn from(e: mls_crypto::MlsError) -> Self {
73          match e {
74              mls_crypto::MlsError::Identity(e) => CoreError::IdentityError(e),
75              mls_crypto::MlsError::Service(e) => CoreError::MlsServiceError(e),
76              mls_crypto::MlsError::Storage(e) => CoreError::StorageError(e),
77          }
78      }
79  }