Module error 

Standardized error types for the NodeDB public API.

NodeDbError is a struct (not an enum) that separates:

• code — stable numeric code for programmatic handling (NDB-1000)
• message — human-readable explanation
• details — machine-matchable ErrorDetails enum with structured data
• cause — optional chained error for debugging

Wire format

Serializes to:

{
  "code": "NDB-1000",
  "message": "constraint violation on users: duplicate email",
  "details": { "kind": "constraint_violation", "collection": "users" }
}

Error code ranges

Range	Category
1000–1099	Write path
1100–1199	Read path
1200–1299	Query
1300–1399	Engine ops
1400–1499	Quota
2000–2099	Auth/Security
3000–3099	Sync
4000–4099	Storage
4100–4199	WAL
4200–4299	Serialization
5000–5099	Config
6000–6099	Cluster
7000–7099	Memory
8000–8099	Encryption
9000–9099	Internal

Re-exports

pub use code::ErrorCode;

pub use details::ErrorDetails;

pub use types::NodeDbError;

pub use types::NodeDbResult;

Modules

code

Stable numeric error codes for programmatic error handling.

ctors

NodeDbError constructors, split by category.

details

Machine-matchable structured error details.

msgpack

sqlstate

Standard PostgreSQL SQLSTATE code constants.

types

NodeDbError struct + accessors + category predicates + From<io::Error>.