Get rid of boost usage

build.sh

@@ -1 +1 @@
-g++ -std=c++17 main.cpp -o solprice-cli -lcurl -lncurses -lboost_system
+g++ -std=c++17 main.cpp -o solprice-cli -lcurl -lncurses

main.cpp

@@ -1,8 +1,6 @@
 #include <iostream>
 #include <string>
 #include <curl/curl.h>
-#include <boost/json.hpp>
-#include <boost/json/src.hpp>
 #include <ncurses.h>
 
 static size_t WriteCallback(void *contents, size_t size, size_t nmemb, std::string *userp) {
@@ -25,13 +23,28 @@ double getConversionRate() {
         curl_easy_cleanup(curl);
 
         if(res == CURLE_OK) {
-            boost::json::error_code ec;
+            std::size_t usdPos = readBuffer.find("\"usd\":");
-            auto parsed = boost::json::parse(readBuffer, ec);
+            if (usdPos != std::string::npos) {
-            if(!ec) {
+                std::size_t start = readBuffer.find(':', usdPos) + 1;
-                auto& obj = parsed.as_object();
+                std::size_t end = readBuffer.find_first_of("},", start);
-                rate = obj["solana"].as_object()["usd"].as_double();
+                if(start < end) {
+                    std::string usdValue = readBuffer.substr(start, end - start);
+                    usdValue.erase(0, usdValue.find_first_not_of(" \n\r\t"));
+                    usdValue.erase(usdValue.find_last_not_of(" \n\r\t") + 1);
+                    try {
+                        rate = std::stod(usdValue);
+                    } catch (const std::invalid_argument& ia) {
+                        std::cerr << "Invalid argument: " << ia.what() << '\n';
+                    } catch (const std::out_of_range& oor) {
+                        std::cerr << "Out of Range error: " << oor.what() << '\n';
                     }
                 }
+            } else {
+                std::cerr << "USD rate not found in response." << std::endl;
+            }
+        } else {
+            std::cerr << "CURL failed with error code: " << res << std::endl;
+        }
     }
     return rate;
 }