From 1db516c53c0f404935a7eed35daddcab9620a8a2 Mon Sep 17 00:00:00 2001
From: Ken Hibino <ken.hibino7@gmail.com>
Date: Sat, 1 May 2021 06:38:33 -0700
Subject: [PATCH] Add a list of canonical errors in base package

---
 internal/base/base.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/internal/base/base.go b/internal/base/base.go
index db9c145..5384e76 100644
--- a/internal/base/base.go
+++ b/internal/base/base.go
@@ -7,6 +7,7 @@ package base
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"sync"
 	"time"
@@ -589,3 +590,10 @@ type Broker interface {
 	PublishCancelation(id string) error
 	Close() error
 }
+
+// List of canonical errors.
+var (
+	ErrNotFound           = errors.New("not found")
+	ErrFailedPrecondition = errors.New("failed precondition")
+	ErrInternal           = errors.New("internal error")
+)