Blockchain By Example

Error handling

Interestingly, Hyperledger Fabric has its own error-handling package, github.com/pkg/errors, which allows you to handle errors in a much better way than the built-in error handling provided by Go. For example:

import (      "fmt"    "github.com/pkg/errors")//wrapping error with stackfunc wrapWithStack() error {     err := displayError ()       return errors.Wrap(err, "wrapping an application  error with stack trace")}func displayError() error {     return errors.New("example error message")}func main() {     err := displayError()     fmt.Printf("print error without stack trace: %s\n\n", err)     fmt.Printf("print error with stack trace: %+v\n\n", err)     err = wrapWithStack()     fmt.Printf("%+v\n\n", err)}

The aforementioned package provides several helpful ...