EnvelopeGenerator/EnvelopeGenerator.Application/Contracts/IJWTService.cs

using Microsoft.IdentityModel.Tokens;
using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Security.Cryptography;

namespace EnvelopeGenerator.Application.Contracts
{
    public interface IJWTService<TClaimValue>
    {
        public static SymmetricSecurityKey GenerateSecurityKey(int byteSize = 32)
        {
            using var rng = RandomNumberGenerator.Create();
            var randomBytes = new byte[byteSize];
            rng.GetBytes(randomBytes);
            var securityKey = new SymmetricSecurityKey(randomBytes);

            return securityKey;
        }

        string GenerateToken(TClaimValue claimValue);

        JwtSecurityToken? ReadSecurityToken(string token);
    }
}