Function jwtHeaderFromJwtSigner

Returns
    | {
        alg: string;
        jwk?: undefined;
        kid: string;
        trust_chain?: undefined;
        x5c?: undefined;
    }
    | {
        alg: string;
        jwk?: undefined;
        kid: string;
        trust_chain: [string, ...string[]]
        | undefined;
        x5c?: undefined;
    }
    | {
        alg: string;
        jwk: {
            alg?: string;
            crv?: string;
            d?: string;
            dp?: string;
            dq?: string;
            e?: string;
            ext?: boolean;
            k?: string;
            key_ops?: string[];
            kid?: string;
            kty: string;
            n?: string;
            oth?: { d?: string; r?: string; t?: string; [key: string]: unknown }[];
            p?: string;
            q?: string;
            qi?: string;
            use?: string;
            x?: string;
            x5c?: string[];
            x5t?: string;
            "x5t#S256"?: string;
            x5u?: string;
            y?: string;
            [key: string]: unknown;
        };
        kid?: undefined;
        trust_chain?: undefined;
        x5c?: undefined;
    }
    | {
        alg: string;
        jwk?: undefined;
        kid: string
        | undefined;
        trust_chain: [string, ...string[]] | undefined;
        x5c: string[];
    }
    | {
        alg: string;
        jwk?: undefined;
        kid?: undefined;
        trust_chain?: undefined;
        x5c?: undefined;
    }

Header fields required by the signer method.