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Learn about the state in Substrate.
§State
The state is abstracted as a key-value like database. Every item that needs to be persisted by the State Transition Function is written to the state.
§Special keys
The key-value pairs in the state are represented as byte sequences. The node
doesn’t know how to interpret most the key-value pairs. However, there exist some
special keys and its values that are known to the node, the so-called
well-known-keys.