import jwt , { Secret , SignOptions , VerifyOptions } from "jsonwebtoken" ; export interface JwtInterface { verify ( token , options ? ) : Promise < Record < string , unknown > > ; decode ( encryptedData ) : null | { [ key ] : any ; } | string ; sign ( payload , options ? ) : Promise < string > ; } export class JwtService implements JwtInterface { constructor ( private readonly secretOrPrivateKey ) { } /**
     * Asynchronously verify given token using a secret or a public key to get a decoded token
     */ verify ( token , options = { } ) { return new Promise ( ( resolve , reject ) => { jwt . verify ( token , this . secretOrPrivateKey , options , ( err , decoded ) => { if ( decoded ) resolve ( decoded ) ; else reject ( err ) ; } ) ; } ) ; } /**
     * Returns the decoded payload without verifying if the signature is valid.
     */ decode ( encryptedData ) { return jwt . decode ( encryptedData ) ; } /**
     * Sign the given payload into a JSON Web Token string
     */ sign ( payload ) { return new Promise ( ( resolve , reject ) => { jwt . sign ( payload , this . secretOrPrivateKey , ( err , encoded ) => { if ( encoded ) resolve ( encoded ) ; else reject ( err ) ; } ) ; } ) ; } }