From aa95d5461807704f47f09b8343c30b0be30ba88b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Paulo=20Sima=CC=83o?= <paulo@digitalcircle.com.br>
Date: Wed, 29 Sep 2021 22:16:31 -0300
Subject: [PATCH] cnpj on the way

---
 README.md        |  2 +-
 cnpj/lib.go      | 16 ++++++++++------
 cnpj/lib_test.go |  5 +++++
 3 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index f011391..17b29f3 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Validators
 
-Package with multiple complex validation entities (only CPF now)
+Package with multiple complex validation entities (only CPF & CNPJ now)
 
 Usage:
 
diff --git a/cnpj/lib.go b/cnpj/lib.go
index 0339b94..58e4b35 100644
--- a/cnpj/lib.go
+++ b/cnpj/lib.go
@@ -38,13 +38,15 @@ func Check(s string) bool {
 	for _, v := range nums[0 : len(nums)-2] {
 		d1 = d1 + (v * mul)
 		mul--
-		if mul == 2 {
+		if mul == 1 {
 			mul = 9
 		}
 	}
-	mod1 := 11 - ((d1) % 11)
-	if mod1 > 10 {
+	mod1 := ((d1) % 11)
+	if mod1 < 2 {
 		mod1 = 0
+	} else {
+		mod1 = 11 - mod1
 	}
 
 	d2 := 0
@@ -52,14 +54,16 @@ func Check(s string) bool {
 	for _, v := range nums[0 : len(nums)-2] {
 		d2 = d2 + (v * mul)
 		mul--
-		if mul == 2 {
+		if mul == 1 {
 			mul = 9
 		}
 	}
 	d2 = d2 + (mod1 * mul)
-	mod2 := 11 - ((d2) % 11)
-	if mod2 > 10 {
+	mod2 := (d2) % 11
+	if mod2 < 2 {
 		mod2 = 0
+	} else {
+		mod2 = 11 - mod2
 	}
 	return mod1 == nums[len(nums)-2] && mod2 == nums[len(nums)-1]
 }
diff --git a/cnpj/lib_test.go b/cnpj/lib_test.go
index 41992b2..3585098 100644
--- a/cnpj/lib_test.go
+++ b/cnpj/lib_test.go
@@ -12,6 +12,11 @@ func TestFormat(t *testing.T) {
 func TestCheck(t *testing.T) {
 	for _, v := range []string{
 		"60.119.200/0001-90",
+		"77.791.482/0001-70",
+		"78.803.323/0001-00",
+		"92.632.766/0001-07",
+		"42.756.293/0001-81",
+		"59.663.919/0001-08",
 	} {
 		ret := Check(v)
 		log.Printf("%s=>%v", v, ret)