Фикс для BadResponseException в 1.4.0

src/main/java/com/qiwi/billpayments/sdk/client/BillPaymentClient.java

@@ -65,7 +65,7 @@ static BillResponse appendSuccessUrl(BillResponse response, String successUrl) t
     private CreateBillRequest appendCustomFields(CreateBillInfo info) {
         return CreateBillRequest.create(
                 info,
-                new CustomFields(CLIENT_NAME, appVersion)
+                new CustomFields(CLIENT_NAME, appVersion, null)
         );
     }
 

src/main/java/com/qiwi/billpayments/sdk/model/in/CustomFields.java

@@ -1,19 +1,24 @@
 package com.qiwi.billpayments.sdk.model.in;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+@JsonIgnoreProperties(ignoreUnknown = true)
 public class CustomFields {
     private final String apiClient;
     private final String apiClientVersion;
+    private final String checkoutReferer;
 
     @JsonCreator
     public CustomFields(
             @JsonProperty("apiClient") String apiClient,
-            @JsonProperty("apiClientVersion") String apiClientVersion
+            @JsonProperty("apiClientVersion") String apiClientVersion,
+            @JsonProperty("CHECKOUT_REFERER") String checkoutReferer
     ) {
         this.apiClient = apiClient;
         this.apiClientVersion = apiClientVersion;
+        this.checkoutReferer = checkoutReferer;
     }
 
     public String getApiClient() {
@@ -24,11 +29,17 @@ public String getApiClientVersion() {
         return apiClientVersion;
     }
 
+    public String getCheckoutReferer() {
+        return checkoutReferer;
+    }
+
     @Override
     public String toString() {
         return "CustomFields{" +
                 "apiClient='" + apiClient + '\'' +
                 ", apiClientVersion='" + apiClientVersion + '\'' +
+                ", checkoutReferer='" + checkoutReferer + '\'' +
                 '}';
     }
+
 }

src/test/java/com/qiwi/billpayments/sdk/client/BillPaymentClientTest.java

@@ -60,7 +60,7 @@ public void testAppendSuccessUrl() throws Exception {
                 ZonedDateTime.now(),
                 ZonedDateTime.now(),
                 "http://test.ru/",
-                new CustomFields("client", "version")
+                new CustomFields("client", "version", null)
         );
 
         //when