Get Errors when generate B2C invoices

Signing process
10

Yes, sure.
there are two ways to do it.

  1. Use the OpenSSL command to convert the private key format “openssl ecparam -name secp256k1 -genkey -noout -out private-key.pem”.
    2-C# code to convert the private key to PEM format:
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.OpenSsl;
using Org.BouncyCastle.Security;

class Program{
	static void Main(string[] args){
		string privateKeyContent = "XXXXXXXXXXXXXX";// the private key contant genetated by ZATKA SDK
		AsymmetricKeyParameter privateKey = PrivateKeyFactory.CreateKey(Convert.FromBase64String(privateKeyContent));
		privateKeyContent = ConvertPrivateKeyToPem(privateKey);
		Console.WriteLine(privateKeyContent);
	}


	public static string ConvertPrivateKeyToPem(AsymmetricKeyParameter privateKey)
	{
		StringWriter stringWriter = new StringWriter();
		PemWriter pemWriter = new PemWriter(stringWriter);
		pemWriter.WriteObject(privateKey);
		pemWriter.Writer.Flush();
		return stringWriter.ToString();
	}
}

Regards