Function isVerification

Returns value is Readonly<
    {
        authorization: "not_evaluated";
        content: | Readonly<
            {
                bytes: number;
                checked: readonly string[];
                kind: "content-digest"
                | "repr-digest";
                unsupported: readonly string[];
            },
        >
        | "not_required";
        freshness: | "not_evaluated"
        | Readonly<
            {
                created: number
                | null;
                expires: number | null;
                maxAge: number | null;
                now: number;
                skew: number;
            },
        >;
        label: string;
        principal: | "unattributed"
        | Readonly<
            {
                identifier: string;
                kind: "agent";
                origin: string;
                provenance: Readonly<
                    {
                        fetchedAt: number;
                        proof: Proof;
                        revision: string
                        | null;
                        sourceType: "directory" | "jwks_uri" | "cimd";
                    },
                >;
                thumbprint: string;
                type: "directory"
                | "jwks_uri"
                | "cimd";
            },
        >
        | Readonly<{ kind: "key"; thumbprint: string }>;
        profile:
            | Readonly<
                {
                    name: "web_bot_auth";
                    revision: "draft-ietf-webbotauth-httpsig-protocol-00";
                },
            >
            | Readonly<{ name: "rfc9421" }>
            | ProfileStamp<never>;
        replay: Readonly<{ retainUntil: number; store: string }> | "not_required";
        signature: Readonly<
            {
                algorithm: SigningAlgorithm;
                covered: readonly (readonly [string, Parameters])[];
                crypto: "valid";
                keyid: string | null;
                parameters: Parameters;
            },
        >;
    },
>