diff --git a/browser/extensions/api/crypto_dot_com_api.cc b/browser/extensions/api/crypto_dot_com_api.cc
index 8cd022f50f8..cb69b61b243 100644
--- a/browser/extensions/api/crypto_dot_com_api.cc
+++ b/browser/extensions/api/crypto_dot_com_api.cc
@@ -53,7 +53,7 @@ CryptoDotComGetTickerInfoFunction::Run() {
 }
 
 void CryptoDotComGetTickerInfoFunction::OnInfoResult(
-    const std::map<std::string, std::string>& info) {
+    const CryptoDotComTickerInfo& info) {
   auto result = std::make_unique<base::Value>(
       base::Value::Type::DICTIONARY);
 
@@ -85,7 +85,7 @@ CryptoDotComGetChartDataFunction::Run() {
 }
 
 void CryptoDotComGetChartDataFunction::OnChartDataResult(
-    const std::vector<std::map<std::string, std::string>>& data) {
+    const CryptoDotComChartData& data) {
   auto result = std::make_unique<base::ListValue>();
 
   for (const auto& data_point : data) {
@@ -117,7 +117,7 @@ CryptoDotComGetSupportedPairsFunction::Run() {
 }
 
 void CryptoDotComGetSupportedPairsFunction::OnSupportedPairsResult(
-    const std::vector<std::map<std::string, std::string>>& pairs) {
+    const CryptoDotComSupportedPairs& pairs) {
   auto result = std::make_unique<base::ListValue>();
 
   for (const auto& pair : pairs) {
@@ -149,8 +149,7 @@ CryptoDotComGetAssetRankingsFunction::Run() {
 }
 
 void CryptoDotComGetAssetRankingsFunction::OnAssetRankingsResult(
-    const std::map<std::string,
-    std::vector<std::map<std::string, std::string>>>& rankings) {
+    const CryptoDotComAssetRankings& rankings) {
   auto result = std::make_unique<base::Value>(
       base::Value::Type::DICTIONARY);
 
diff --git a/browser/extensions/api/crypto_dot_com_api.h b/browser/extensions/api/crypto_dot_com_api.h
index cbe6c76cbf7..9736d10da99 100644
--- a/browser/extensions/api/crypto_dot_com_api.h
+++ b/browser/extensions/api/crypto_dot_com_api.h
@@ -11,6 +11,7 @@
 #include <vector>
 
 #include "extensions/browser/extension_function.h"
+#include "brave/components/crypto_dot_com/browser/crypto_dot_com_service.h"
 
 class Profile;
 
@@ -24,7 +25,7 @@ class CryptoDotComGetTickerInfoFunction :
 
  protected:
   ~CryptoDotComGetTickerInfoFunction() override {}
-  void OnInfoResult(const std::map<std::string, std::string>& info);
+  void OnInfoResult(const CryptoDotComTickerInfo& info);
 
   ResponseAction Run() override;
 };
@@ -37,7 +38,7 @@ class CryptoDotComGetChartDataFunction :
  protected:
   ~CryptoDotComGetChartDataFunction() override {}
   void OnChartDataResult(
-      const std::vector<std::map<std::string, std::string>>& data);
+      const CryptoDotComChartData& data);
 
   ResponseAction Run() override;
 };
@@ -50,7 +51,7 @@ class CryptoDotComGetSupportedPairsFunction :
  protected:
   ~CryptoDotComGetSupportedPairsFunction() override {}
   void OnSupportedPairsResult(
-      const std::vector<std::map<std::string, std::string>>& pairs);
+      const CryptoDotComSupportedPairs& pairs);
 
   ResponseAction Run() override;
 };
@@ -63,8 +64,7 @@ class CryptoDotComGetAssetRankingsFunction :
  protected:
   ~CryptoDotComGetAssetRankingsFunction() override {}
   void OnAssetRankingsResult(
-      const std::map<std::string,
-      std::vector<std::map<std::string, std::string>>>& rankings);
+      const CryptoDotComAssetRankings& rankings);
 
   ResponseAction Run() override;
 };
diff --git a/components/crypto_dot_com/browser/crypto_dot_com_json_parser.cc b/components/crypto_dot_com/browser/crypto_dot_com_json_parser.cc
index fff7befccbc..cb671aed44c 100644
--- a/components/crypto_dot_com/browser/crypto_dot_com_json_parser.cc
+++ b/components/crypto_dot_com/browser/crypto_dot_com_json_parser.cc
@@ -24,7 +24,7 @@ void CryptoDotComJSONParser::CalculateAssetVolume(
 
 bool CryptoDotComJSONParser::GetTickerInfoFromJSON(
     const std::string& json,
-    std::map<std::string, std::string>* info) {
+    CryptoDotComTickerInfo* info) {
   if (!info) {
     return false;
   }
@@ -78,7 +78,7 @@ bool CryptoDotComJSONParser::GetTickerInfoFromJSON(
 
 bool CryptoDotComJSONParser::GetChartDataFromJSON(
     const std::string& json,
-    std::vector<std::map<std::string, std::string>>* data) {
+    CryptoDotComChartData* data) {
   if (!data) {
     return false;
   }
@@ -144,7 +144,7 @@ bool CryptoDotComJSONParser::GetChartDataFromJSON(
 
 bool CryptoDotComJSONParser::GetPairsFromJSON(
     const std::string& json,
-    std::vector<std::map<std::string, std::string>>* pairs) {
+    CryptoDotComSupportedPairs* pairs) {
   if (!pairs) {
     return false;
   }
@@ -198,8 +198,7 @@ bool CryptoDotComJSONParser::GetPairsFromJSON(
 
 bool CryptoDotComJSONParser::GetRankingsFromJSON(
     const std::string& json,
-    std::map<std::string,
-    std::vector<std::map<std::string, std::string>>>* rankings) {
+    CryptoDotComAssetRankings* rankings) {
   if (!rankings) {
     return false;
   }
diff --git a/components/crypto_dot_com/browser/crypto_dot_com_json_parser.h b/components/crypto_dot_com/browser/crypto_dot_com_json_parser.h
index f5d556e4ae4..6bfe7774a7b 100644
--- a/components/crypto_dot_com/browser/crypto_dot_com_json_parser.h
+++ b/components/crypto_dot_com/browser/crypto_dot_com_json_parser.h
@@ -10,17 +10,18 @@
 #include <string>
 #include <vector>
 
+#include "brave/components/crypto_dot_com/browser/crypto_dot_com_service.h"
+
 class CryptoDotComJSONParser {
  public:
   static bool GetTickerInfoFromJSON(const std::string& json,
-      std::map<std::string, std::string>* info);
+      CryptoDotComTickerInfo* info);
   static bool GetChartDataFromJSON(const std::string& json,
-      std::vector<std::map<std::string, std::string>>* data);
+      CryptoDotComChartData* data);
   static bool GetPairsFromJSON(const std::string& json,
-      std::vector<std::map<std::string, std::string>>* pairs);
+      CryptoDotComSupportedPairs* pairs);
   static bool GetRankingsFromJSON(const std::string& json,
-      std::map<std::string,
-      std::vector<std::map<std::string, std::string>>>* rankings);
+      CryptoDotComAssetRankings* rankings);
  private:
   static void CalculateAssetVolume(const double v,
       const double h,
diff --git a/components/crypto_dot_com/browser/crypto_dot_com_service.cc b/components/crypto_dot_com/browser/crypto_dot_com_service.cc
index d26d6796e9c..543d369ae10 100644
--- a/components/crypto_dot_com/browser/crypto_dot_com_service.cc
+++ b/components/crypto_dot_com/browser/crypto_dot_com_service.cc
@@ -62,6 +62,10 @@ GURL GetURLWithPath(const std::string& host, const std::string& path) {
   return GURL(std::string(url::kHttpsScheme) + "://" + host).Resolve(path);
 }
 
+std::string GetFormattedResponseBody(const std::string& json_response) {
+  return "{\"response\": " + json_response + "}";
+}
+
 }  // namespace
 
 CryptoDotComService::CryptoDotComService(content::BrowserContext* context)
@@ -89,9 +93,9 @@ void CryptoDotComService::OnTickerInfo(
   GetTickerInfoCallback callback,
   const int status, const std::string& body,
   const std::map<std::string, std::string>& headers) {
-  std::map<std::string, std::string> info;
+  CryptoDotComTickerInfo info;
   if (status >= 200 && status <= 299) {
-    const std::string json_body = "{\"response\": " + body + "}";
+    const std::string json_body = GetFormattedResponseBody(body);
     CryptoDotComJSONParser::GetTickerInfoFromJSON(json_body, &info);
   }
   std::move(callback).Run(info);
@@ -113,9 +117,9 @@ void CryptoDotComService::OnChartData(
   GetChartDataCallback callback,
   const int status, const std::string& body,
   const std::map<std::string, std::string>& headers) {
-  std::vector<std::map<std::string, std::string>> data;
+  CryptoDotComChartData data;
   if (status >= 200 && status <= 299) {
-    const std::string json_body = "{\"response\": " + body + "}";
+    const std::string json_body = GetFormattedResponseBody(body);
     CryptoDotComJSONParser::GetChartDataFromJSON(json_body, &data);
   }
   std::move(callback).Run(data);
@@ -135,9 +139,9 @@ void CryptoDotComService::OnSupportedPairs(
   GetSupportedPairsCallback callback,
   const int status, const std::string& body,
   const std::map<std::string, std::string>& headers) {
-  std::vector<std::map<std::string, std::string>> pairs;
+  CryptoDotComSupportedPairs pairs;
   if (status >= 200 && status <= 299) {
-    const std::string json_body = "{\"response\": " + body + "}";
+    const std::string json_body = GetFormattedResponseBody(body);
     CryptoDotComJSONParser::GetPairsFromJSON(json_body, &pairs);
   }
   std::move(callback).Run(pairs);
@@ -157,10 +161,9 @@ void CryptoDotComService::OnAssetRankings(
     GetAssetRankingsCallback callback,
     const int status, const std::string& body,
     const std::map<std::string, std::string>& headers) {
-  std::map<std::string,
-      std::vector<std::map<std::string, std::string>>> rankings;
+  CryptoDotComAssetRankings rankings;
   if (status >= 200 && status <= 299) {
-    const std::string json_body = "{\"response\": " + body + "}";
+    const std::string json_body = GetFormattedResponseBody(body);
     CryptoDotComJSONParser::GetRankingsFromJSON(json_body, &rankings);
   }
   std::move(callback).Run(rankings);
diff --git a/components/crypto_dot_com/browser/crypto_dot_com_service.h b/components/crypto_dot_com/browser/crypto_dot_com_service.h
index 973f6c95822..035e3ee049f 100644
--- a/components/crypto_dot_com/browser/crypto_dot_com_service.h
+++ b/components/crypto_dot_com/browser/crypto_dot_com_service.h
@@ -43,23 +43,26 @@ const char get_chart_data_path[] = "/v2/public/get-candlestick";
 const char get_pairs_path[] = "/v2/public/get-instruments";
 const char get_gainers_losers_path[] = "/fe-ex-api/widget/get-gainers";
 
+typedef std::map<std::string, std::string> CryptoDotComTickerInfo;
+typedef std::vector<std::map<std::string, std::string>> CryptoDotComChartData;
+typedef std::vector<std::map<std::string, std::string>>
+    CryptoDotComSupportedPairs;
+typedef std::map<std::string, std::vector<std::map<std::string, std::string>>>
+    CryptoDotComAssetRankings;
+
 class CryptoDotComService : public KeyedService {
  public:
   explicit CryptoDotComService(content::BrowserContext* context);
   ~CryptoDotComService() override;
 
   using GetTickerInfoCallback =
-        base::OnceCallback<void(const std::map<std::string, std::string>&)>;
+        base::OnceCallback<void(const CryptoDotComTickerInfo&)>;
   using GetChartDataCallback =
-        base::OnceCallback<void(
-            const std::vector<std::map<std::string, std::string>>&)>;
+        base::OnceCallback<void(const CryptoDotComChartData&)>;
   using GetSupportedPairsCallback =
-        base::OnceCallback<void(
-            const std::vector<std::map<std::string, std::string>>&)>;
+        base::OnceCallback<void(const CryptoDotComSupportedPairs&)>;
   using GetAssetRankingsCallback =
-        base::OnceCallback<void(
-            const std::map<std::string,
-            std::vector<std::map<std::string, std::string>>>&)>;
+        base::OnceCallback<void(const CryptoDotComAssetRankings&)>;
 
   bool GetTickerInfo(const std::string& asset,
                      GetTickerInfoCallback callback);