controller.go

package controller

import (
   "blodpost/logger"
   "blodpost/protocol"
   "github.com/pkg/errors"
   "math/rand"
)

func Process(company *protocol.Company) error {
   if err := doStuff(); err != nil {

      // note the logging done here and company provided as an argument here
      logger.Error("failed to process company", company)
      
      return errors.Wrap(err, "failed to process")
   }

   return nil
}

func doStuff() error {
   if rand.Int63n(10) < 5 {
      return errors.New("random error")
   }

   return nil
}