Install failed on Windows Universal

[quartsystem]

NuGet no longer able to install the package on a Windows Universal project with VS2015

[NicolasDorier]

was it able before ? I can't compile on windows universal so I don't know. What error do you have ? (sorry for the delay)

[NicolasDorier]

Can you also try the "NBitcoin For Mono" package ?

[quartsystem]

NuGet / Visual Studio 2015 is now able to perform the update to new release(2.1.4.7). All very strange.
The error message was "Unable to find metadata of NBitcoin xxxx".
Thanks anyway for the answer.

[NicolasDorier]

By the way, I am interested to know if it the lib works fine on Univeral Project, since I did not tried. Let me know.
I don't think you have access to the Node class (to connect to network) on Universal project, can you confirm ?

If it is a problem for you, you can try NBitcoin For Mono package which include everything and should also works fine on Universal.

[quartsystem]

I'm developing a client for Windows 10 in my spare time.
I'll keep you updated on the tests that will.

[quartsystem]

On universal Windows (app for Windows 10) NBitcoin.Mono fails installation with NuGet.
With NBitcoin, when launching the following code is generated an exception:

var k = new NBitcoin.Key();

System.InvalidOperationException: You must set the RNG (RandomUtils.Random) before generating random numbers
at NBitcoin.RandomUtils.GetBytes(Byte[] output)
at NBitcoin.Key..ctor(Boolean fCompressedIn)
at NBitcoin.Key..ctor()
at TestInstallNBitcoin.MainPage..ctor()
at TestInstallNBitcoin.TestInstallNBitcoin_XamlTypeInfo.XamlTypeInfoProvider.Activate_0_MainPage()
at TestInstallNBitcoin.TestInstallNBitcoin_XamlTypeInfo.XamlUserType.ActivateInstance()
at Windows.UI.Xaml.Controls.Fra

[quartsystem]

On Windows 10, PRNG uses the CryptographicBuffer. I solved this code:

public class CryptographicBufferRandom : IRandom
{
    #region IRandom Members
    public void GetBytes(byte[] output)
    {
        // https://msdn.microsoft.com/en-us/library/windows.security.cryptography.cryptographicbuffer.aspx
        IBuffer buffer = CryptographicBuffer.GenerateRandom((uint)output.Length);
        buffer.CopyTo(output);
    }
    #endregion
}

To generate the key
NBitcoin.RandomUtils.Random = new CryptographicBufferRandom();
var newKey = new NBitcoin.Key();

[NicolasDorier]

thanks, will be useful when I'll make a specific version for universal

[GoldNRoll]

Hello,

Any chance this will be solved for Windows 10?

NBitcoin.4.0.0.13

Any code fails with this error:
System.InvalidOperationException: You must set the RNG (RandomUtils.Random) before generating random numbers

using System;
using NBitcoin;

namespace Blockchain
{
class Program
{
static void Main(string[] args)
{
Key privateKey = new Key();
Console.WriteLine("Private Key: {0}", privateKey);
PubKey publicKey = privateKey.PubKey;
Console.WriteLine("Public Key: {0}", publicKey);
}
}
}

Thanks, Alexandru

[NicolasDorier]

@GoldNRoll set RandomUtils.Random to an instance of CryptographicBufferRandom made by @quartsystem just above.

Windows Universal will soon support .NETStandard 2.0, so it will soon be not needed.

Actually I think this is supported, in fall creator update https://blogs.windows.com/buildingapps/2017/05/19/introducing-xaml-standard-net-standard-2-0/

[GoldNRoll]

Perfect, thanks!!

[NicolasDorier]

@GoldNRoll sorry I incorrectly diagnotised your problem, turns out you were not using UWP so my response does not apply.

I fixed the problem, now you can reference NBitcoin without the issue.

Someone reported it ProgrammingBlockchain/ProgrammingBlockchain#73

The issue was that I dropped net452 support for I don't know what reason, but some version of Visual Studio still use this old .net version for new project template. I added back the support, so now you won't get error.

[GoldNRoll]

Hi Nicolas,

Perfect, I updated NBitcoin to 4.0.0.15 and now it works in console application :)
Visual Studio 2017 fresh install still comes with framework 4.5.2

Thank you!!