Update README.md

brutaldev · Jun 27, 2018 · 09b6967 · 09b6967
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diff --git a/README.md b/README.md
@@ -31,21 +31,93 @@ Value String | Field Reference | Spec ID | Value Length | Spec Value | Explanati
 52044111 | Merchant Category Code | "52" | 4 | 4111 | The Merchant Category Code (MCC) shall contain an MCC as defined by **ISO 18245**.
 6011Mexico City | Merchant City | "60" | 11 | Mexico City | The Merchant City should indicate the city of the merchant's physical location.
 
-To see the full spec reference please read the specification provided by EMV(R).
+To see the full spec reference please read the specification provided by EMV(R) or read it from the [file included](../master/specs/EMVCo-Merchant-Presented-QR-Specification-v1-1.pdf)
 
-In order to create a _dynamic_ qr code with a Transaction Amount you could do the following:
+You can also go full fluent. The following example shows most of the fields used with the easier fluent approach:
 
 ```csharp
 var globalUniqueIdentifier = Guid.NewGuid().ToString().Replace("-", string.Empty);
 
-var merchantPayload = MerchantPayload.CreateDynamic(
-    globalUniqueIdentifier,
-    4111,
-    Iso4217Currency.MexicoPeso.Value.NumericCode,
-    Iso3166Countries.Mexico,
-    "My Super Shop",
-    "Mexico City")
-    .WithTransactionAmount(100);
+var merchantPayload = MerchantPayload
+    .CreateDynamic(globalUniqueIdentifier, 4111, Iso4217Currency.MexicoPeso.Value.NumericCode, Iso3166Countries.Mexico, "Chocolate Powder", "Mexico City")
+    .WithAlternateLanguage(Iso639Languages.SpanishCastilian, "Chocolate en Polvo", "CDMX")
+    .WithTransactionAmount(34.95m)
+    .WithTipByUser()
+    .WithAdditionalData(
+        billNumber: "1234",
+        mobileNumber: "5512341234",
+        storeLabel: "The large store",
+        loyaltyNumber: "A12341234",
+        referenceLabel: "***",
+        terminalLabel: "T12341",
+        purposeOfTransaction: "We do commerce",
+        additionalConsumerDataRequest: "AME")
+    .WithUnreservedTemplate(globalUniqueIdentifier, new Dictionary<int, string>
+    {
+        {1, "Some value" },
+        {2, "Another value" }
+    });
 
 var payload = merchantPayload.GeneratePayload();
 ```
+
+## Decoding a Merchant-Presented QR
+You can easily decode a QR code by using the **FromQR** static constructor. Please note that the data will be validated against the spec automatically.
+
+```csharp
+var merchantPayload = MerchantPayload.FromQR(qr);
+```
+
+### Sample
+The following sample which is included in the Unit Tests shows how to generate the QR data and then decode it back to an object.
+```csharp
+var globalUniqueIdentifier = Guid.NewGuid().ToString().Replace("-", string.Empty);
+var merchantPayload = MerchantPayload
+    .CreateDynamic(globalUniqueIdentifier, 4111, Iso4217Currency.MexicoPeso.Value.NumericCode, Iso3166Countries.Mexico, "Chocolate Powder", "Mexico City")
+    .WithAlternateLanguage(Iso639Languages.SpanishCastilian, "Chocolate en Polvo", "CDMX")
+    .WithTransactionAmount(34.95m)
+    .WithTipByUser()
+    .WithAdditionalData(
+        billNumber: "1234",
+        mobileNumber: "5512341234",
+        storeLabel: "The large store",
+        loyaltyNumber: "A12341234",
+        referenceLabel: "***",
+        terminalLabel: "T12341",
+        purposeOfTransaction: "We do commerce",
+        additionalConsumerDataRequest: "AME")
+    .WithUnreservedTemplate(globalUniqueIdentifier, new Dictionary<int, string>
+    {
+        {1, "Some value" },
+        {2, "Another value" }
+    });
+merchantPayload.PostalCode = "12345";
+
+var qr = merchantPayload.GeneratePayload();
+
+merchantPayload = MerchantPayload.FromQR(qr);
+Assert.Equal(globalUniqueIdentifier, merchantPayload.MerchantAccountInformation.First().Value.GlobalUniqueIdentifier);
+Assert.Equal(4111, merchantPayload.MerchantCategoryCode);
+Assert.Equal(Iso4217Currency.MexicoPeso.Value.NumericCode, merchantPayload.TransactionCurrency);
+Assert.Equal(Iso3166Countries.Mexico, merchantPayload.CountyCode);
+Assert.Equal("Chocolate Powder", merchantPayload.MerchantName);
+Assert.Equal("Mexico City", merchantPayload.MerchantCity);
+Assert.Equal(Iso639Languages.SpanishCastilian, merchantPayload.MerchantInformation.LanguagePreference);
+Assert.Equal("Chocolate en Polvo", merchantPayload.MerchantInformation.MerchantNameAlternateLanguage);
+Assert.Equal("CDMX", merchantPayload.MerchantInformation.MerchantCityAlternateLanguage);
+Assert.Equal(34.95m, merchantPayload.TransactionAmount);
+Assert.Equal(1, merchantPayload.TipOrConvenienceIndicator);
+Assert.Equal("1234", merchantPayload.AdditionalData.BillNumber);
+Assert.Equal("5512341234", merchantPayload.AdditionalData.MobileNumber);
+Assert.Equal("The large store", merchantPayload.AdditionalData.StoreLabel);
+Assert.Equal("A12341234", merchantPayload.AdditionalData.LoyaltyNumber);
+Assert.Equal("***", merchantPayload.AdditionalData.ReferenceLabel);
+Assert.Equal("T12341", merchantPayload.AdditionalData.TerminalLabel);
+Assert.Equal("We do commerce", merchantPayload.AdditionalData.PurposeOfTransaction);
+Assert.Equal("AME", merchantPayload.AdditionalData.AdditionalConsumerDataRequest);
+Assert.Equal(globalUniqueIdentifier, merchantPayload.UnreservedTemplate.First().Value.GlobalUniqueIdentifier);
+Assert.Equal("Some value", merchantPayload.UnreservedTemplate.First().Value.ContextSpecificData[1]);
+Assert.Equal("Another value", merchantPayload.UnreservedTemplate.First().Value.ContextSpecificData[2]);
+Assert.Equal("12345", merchantPayload.PostalCode);
+Assert.NotNull(merchantPayload.CRC);
+```