Support the DID DHT API#76
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| if err = s.db.WriteDID(storage.GatewayRecord{ |
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Is there a possible race condition when publishing the same did? Perhaps some idempotency key is necessary.
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yeah I'm also worried about multiple DIDs updating the type index at the same time...
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| knownTypes = []TypeMapping{ |
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Side question: how are types registered? Is it a centralized registry?
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| // WriteDID writes a DID to the storage and adds it to the type index(es) it is associated with | ||
| func (s *Storage) WriteDID(record GatewayRecord) error { |
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How do you intend to handle failures in the middle? For example, the write succeeds, but the update does not.
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ideally this should be a txn with rollbacks
| for _, currType := range currTypes { | ||
| if _, ok := newTypeMap[currType]; !ok { | ||
| if err := s.RemoveDIDFromTypeIndex(id, currType); err != nil { | ||
| return err | ||
| } | ||
| } | ||
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| // add the DID to any type indexes it is now associated with | ||
| for _, newType := range newTypes { | ||
| if _, ok := currTypeMap[newType]; !ok { | ||
| if err := s.AddDIDToTypeIndex(id, newType); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } |
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Removing and then adding add steps which may fail in the middle.
Instead, consider replacing the types with the new value. This might be more easily supported by the storage layer.
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good idea will update
2 participants
Fix #43 #13 #24 #72