Example for my iDDD with Go blog article series at https://medium.com/@TonyBologni

Errors.go

package shared

import "github.com/cockroachdb/errors"

var (
    ErrInputIsInvalid = errors.New("input is invalid")
    ErrNotFound       = errors.New("not found")
    ErrDuplicate      = errors.New("duplicate")

    ErrDomainConstraintsViolation = errors.New("domain constraints violation")

    ErrMaxRetriesExceeded  = errors.New("max retries exceeded")
    ErrConcurrencyConflict = errors.New("concurrency conflict")

    ErrMarshalingFailed   = errors.New("marshaling failed")
    ErrUnmarshalingFailed = errors.New("unmarshaling failed")
    ErrTechnical          = errors.New("technical")
)

func MarkAndWrapError(original error, markAs error, wrapWith string) error {
    return errors.Mark(errors.Wrap(original, wrapWith), markAs)
}