CREATE TABLE live_event_tickets (
    ticket_digest BYTEA PRIMARY KEY CHECK (octet_length(ticket_digest) = 32),
    principal JSONB NOT NULL,
    origin TEXT NOT NULL CHECK (origin <> ''),
    created_at TIMESTAMPTZ NOT NULL,
    expires_at TIMESTAMPTZ NOT NULL CHECK (expires_at > created_at)
);

CREATE INDEX live_event_tickets_expiry_idx
    ON live_event_tickets (expires_at);