PluralKit/PluralKit.Core/Database/Wrappers/PKTransaction.cs

using System;
using System.Data;
using System.Data.Common;
using System.Threading;
using System.Threading.Tasks;

using Npgsql;

namespace PluralKit.Core
{
    internal class PKTransaction: DbTransaction, IPKTransaction
    {
        public NpgsqlTransaction Inner { get; }
        
        public PKTransaction(NpgsqlTransaction inner)
        {
            Inner = inner;
        }

        public override void Commit() => throw SyncError(nameof(Commit));
        public override Task CommitAsync(CancellationToken ct = default) => Inner.CommitAsync(ct);

        public override void Rollback() => throw SyncError(nameof(Rollback));
        public override Task RollbackAsync(CancellationToken ct = default) => Inner.RollbackAsync(ct);

        protected override DbConnection DbConnection => Inner.Connection;
        public override IsolationLevel IsolationLevel => Inner.IsolationLevel;
        
        private static Exception SyncError(string caller) => throw new Exception($"Executed synchronous IDbTransaction function {caller}!");
    }
}