This CAIP defines an common identifier for representing an open session with a wallet, including both in-browser session tokens and API-based connection IDs.
Currently, sessions with wallet clients are tracked differently across different architectures: in-browser MetaMask sandboxes instance-specific connections based on origin which are referred to by tokens in the browser, while WalletConnect uses a topic-based pub/sub protocol keyed to a unique topic string, etc. Aligning specific aspects of session state can be hard without shared assumptions about session boundaries and tracking. A minimal assumption is that sessions are tracked by identifiers, and that different actors can update the session accordingly.
Such sections are considered non-normative.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" written in uppercase in this document are to be interpreted as described in RFC 2119
Whenever a CAIP uses the name SessionIdentifier and has this CAIP in the
required front-matter property, it SHALL be interpreted as reference to this
specification.
Notice that there are no code constraints on the token value. This is by design and the value is implementation-dependent.
Properties of the SessionIdentifier are as follows:
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