Convert from avro logical types to .net equivalents (and viceversa)

Description

I’m trying to find out a way to use the avro logical types, behind the scene the avrogen tool creates a byte[] property (for decimals) and couldn’t find a way to convert the .net decimals into this.

Can you please help me with this?

How to reproduce

1. Create a schema file, e.g. User.avsc

   [
     {
       "namespace": "Confluent.Kafka.Examples.AvroSpecific",
       "type": "record",
       "name": "User",
       "fields": [
         {
           "name": "name",
           "type": "string"
         },
         {
           "name": "favorite_number",
           "type": [ "int", "null" ]
         },
         {
           "name": "favorite_color",
           "type": [ "string", "null" ]
         },
         {
           "name": "birth_date_raw",
           "type": {
             "type": "int",
             "logicalType": "date"
           }
         },
         {
           "name": "salary_raw",
           "type": {
             "type": "bytes",
             "logicalType": "decimal",
             "precision": 19,
             "scale": 4
           }
         }
       ]
     }
   ]
   

2. Run the avrogen tool in the console.

   avrogen.exe -s .\User.asvc .
   

3. See the generated property in the User.cs (generated class)

   public byte[] salary_raw
   {
      get
      {
         return this._salary_raw;
      }
      set
      {
         this._salary_raw = value;
      }
   }
   

Checklist

Please provide the following information:

• Confluent.Kafka nuget version:
• Apache Kafka version:
• Client configuration:
• Operating system:
• Provide logs (with “debug” : “…” as necessary in configuration)
• Provide broker log excerpts
• Critical issue

[stefan-benjamin]

Any news regarding this issue? I am myself new to Avro and would like to generate a C# model based on a Avro schema .asvc file using the avrogen tool. One of the properties defined in the schema has a ‘timestamp-milis’ logical type that I would like converted to a C# type.

https://avro.apache.org/docs/1.8.0/spec.html#Timestamp

[codeclash]

In case this might help: where s is the avro encoded decimal, and you know the original scale - using @manuel-zulian 's method:

public static decimal GetDecimalFromBase64String(string s, int scale)
{
   var bytes = Convert.FromBase64String(s);
   var result = new BigInteger(bytes.Reverse().ToArray());
   return (decimal)result * (decimal)Math.Pow(10, -scale);
}