frostfs-sdk-csharp/sdk/src/FrostFS.SDK.ClientV2/Services/Session.cs

using FrostFS.Refs;
using FrostFS.SDK.ModelsV2;
using FrostFS.Session;
using Google.Protobuf;

namespace FrostFS.SDK.ClientV2;

public partial class Client
{
    public async Task<SessionToken> CreateSessionAsync(ulong expiration)
    {
        var request = new CreateRequest
        {
            Body = new CreateRequest.Types.Body
            {
                OwnerId = new OwnerID
                {
                    Value = ByteString.CopyFrom(OwnerId.FromKey(_key).ToHash())
                },
                Expiration = expiration,
            }
        };
        request.AddMetaHeader();
        request.Sign(_key);
        return await CreateSession(request);
    }

    public async Task<SessionToken> CreateSession(CreateRequest request)
    {
        var resp = await _sessionServiceClient.CreateAsync(request);
        return new SessionToken
        {
            Body = new SessionToken.Types.Body
            {
                Id = resp.Body.Id,
                SessionKey = resp.Body.SessionKey,
                OwnerId = request.Body.OwnerId,
                Lifetime = new SessionToken.Types.Body.Types.TokenLifetime
                {
                    Exp = request.Body.Expiration,
                    Iat = resp.MetaHeader.Epoch,
                    Nbf = resp.MetaHeader.Epoch,
                }
            }
        };
    }
}