cf-auth0/dist/server/auth/jsonwebtoken/decode.js

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import { jwsDecode } from './jws/lib/jwsDecode';
export function decode(jwt, options = {}) {
    const decoded = jwsDecode(jwt, options);
    const { header, signature } = decoded;
    let { payload } = decoded;
    //try parse the payload
    if (typeof payload === 'string') {
        const obj = JSON.parse(payload);
        if (obj !== null && typeof obj === 'object') {
            payload = obj;
        }
    }
    //return header if `complete` option is enabled.  header includes claims
    //such as `kid` and `alg` used to select the key within a JWKS needed to
    //verify the signature
    if (options.complete === true) {
        return {
            header,
            payload: payload,
            signature
        };
    }
    return payload;
}