diff --git a/examples/main.go b/examples/main.go
new file mode 100644
index 0000000..51103ce
--- /dev/null
+++ b/examples/main.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/thiagozs/go-pixgen/pix"
+)
+
+func main() {
+	opts := []pix.Options{
+		pix.OptPixKey("28707746806"),
+		pix.OptDescription("Teste"),
+		pix.OptMerchantName("Thiago Zilli Sarmento"),
+		pix.OptMerchantCity("Ararangua"),
+		pix.OptAmount("1.00"),
+		pix.OptAditionalInfo("gerado por go-pixgen"),
+		pix.OptKind(pix.STATIC),
+	}
+
+	p, err := pix.New(opts...)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+
+	if err := p.Validates(); err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+
+	cpy := p.GenPayload()
+
+	fmt.Printf("Copy and Paste: %s\n", cpy)
+
+	// bts, err := p.GenQRCode()
+	// if err != nil {
+	// 	fmt.Println(err.Error())
+	// 	return
+	// }
+
+	// fmt.Printf("QRCode: %b\n", bts)
+}
diff --git a/pix/options.go b/pix/options.go
index 8bb9b1e..be38f3d 100644
--- a/pix/options.go
+++ b/pix/options.go
@@ -14,7 +14,7 @@ func (pix PixKind) String() string {
 type Options func(o *OptionsParams) error
 
 type OptionsParams struct {
-	id            string
+	txId          string
 	pixKey        string
 	description   string
 	amount        string
@@ -59,9 +59,9 @@ func OptKind(kind PixKind) Options {
 	}
 }
 
-func OptId(id string) Options {
+func OptTxId(id string) Options {
 	return func(o *OptionsParams) error {
-		o.id = id
+		o.txId = id
 		return nil
 	}
 }
@@ -103,8 +103,8 @@ func OptAmount(amount string) Options {
 
 // ------------- getters
 
-func (o *OptionsParams) GetId() string {
-	return o.id
+func (o *OptionsParams) GetTxId() string {
+	return o.txId
 }
 
 func (o *OptionsParams) GetPixKey() string {
diff --git a/pix/pix.go b/pix/pix.go
index 80ddb46..c7e6609 100644
--- a/pix/pix.go
+++ b/pix/pix.go
@@ -102,8 +102,8 @@ func (p *Pix) generateMAI() string {
 
 func (p *Pix) generateAdditionalData() string {
 	txid := "***"
-	if len(p.params.id) > 0 {
-		txid = p.params.id
+	if len(p.params.txId) > 0 {
+		txid = p.params.txId
 	}
 	return p.getValue(TAG_TXID, txid)
 }