feat: implement session key management contract#9
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Replaces the counter stub with a full session key contract that enables frontends to perform on-chain actions via scoped, time-bound session keys rather than requiring the wallet owner to sign every transaction. Functions implemented: - create_session(user, session_key, expires_at, allowed_actions) Requires wallet owner auth. Stores session data keyed by session_key for O(1) lookup. Rejects sessions expiring in the past. Bumps persistent storage TTL to cover the full session lifetime. - revoke_session(user, session_key) Requires wallet owner auth. Validates caller is the session owner. Idempotent — silently succeeds if session already absent. - validate_session(session_key, action) → bool Never panics. Returns false for missing, expired, or out-of-scope sessions. Enforces action whitelist so session keys cannot transfer assets outside platform-defined scopes. - get_session(session_key) → Option<SessionData> Off-chain inspection helper. Storage: DataKey::Session(Address) → SessionData gives direct O(1) key-value access with no secondary indexes. Tests: 9 unit tests + 2 integration tests covering all acceptance criteria (scope enforcement, expiry, owner-only auth, idempotency).
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Replaces the counter stub with a full session key contract that enables frontends to perform on-chain actions via scoped, time-bound session keys rather than requiring the wallet owner to sign every transaction.
Functions implemented:
create_session(user, session_key, expires_at, allowed_actions) Requires wallet owner auth. Stores session data keyed by session_key for O(1) lookup. Rejects sessions expiring in the past. Bumps persistent storage TTL to cover the full session lifetime.
revoke_session(user, session_key) Requires wallet owner auth. Validates caller is the session owner. Idempotent — silently succeeds if session already absent.
validate_session(session_key, action) → bool Never panics. Returns false for missing, expired, or out-of-scope sessions. Enforces action whitelist so session keys cannot transfer assets outside platform-defined scopes.
get_session(session_key) → Option Off-chain inspection helper.
Storage: DataKey::Session(Address) → SessionData gives direct O(1) key-value access with no secondary indexes.
Tests: 9 unit tests + 2 integration tests covering all acceptance criteria (scope enforcement, expiry, owner-only auth, idempotency).
Closes #6