rpc: Reorder getchaintxstats output

Author: MarcoFalke

src/rpc/blockchain.cpp

@@ -1651,10 +1651,10 @@ static RPCHelpMan getchaintxstats()
                         {RPCResult::Type::STR_HEX, "window_final_block_hash", "The hash of the final block in the window"},
                         {RPCResult::Type::NUM, "window_final_block_height", "The height of the final block in the window."},
                         {RPCResult::Type::NUM, "window_block_count", "Size of the window in number of blocks"},
+                        {RPCResult::Type::NUM, "window_interval", /*optional=*/true, "The elapsed time in the window in seconds. Only returned if \"window_block_count\" is > 0"},
                         {RPCResult::Type::NUM, "window_tx_count", /*optional=*/true,
                          "The number of transactions in the window. "
                          "Only returned if \"window_block_count\" is > 0 and if txcount exists for the start and end of the window."},
-                        {RPCResult::Type::NUM, "window_interval", /*optional=*/true, "The elapsed time in the window in seconds. Only returned if \"window_block_count\" is > 0"},
                         {RPCResult::Type::NUM, "txrate", /*optional=*/true,
                          "The average rate of transactions per second in the window. "
                          "Only returned if \"window_interval\" is > 0 and if window_tx_count exists."},
@@ -1711,12 +1711,12 @@ static RPCHelpMan getchaintxstats()
     ret.pushKV("window_final_block_height", pindex->nHeight);
     ret.pushKV("window_block_count", blockcount);
     if (blockcount > 0) {
+        ret.pushKV("window_interval", nTimeDiff);
         if (window_tx_count) {
             ret.pushKV("window_tx_count", *window_tx_count);
-        }
-        ret.pushKV("window_interval", nTimeDiff);
-        if (nTimeDiff > 0 && window_tx_count) {
-            ret.pushKV("txrate", double(*window_tx_count) / nTimeDiff);
+            if (nTimeDiff > 0) {
+                ret.pushKV("txrate", double(*window_tx_count) / nTimeDiff);
+            }
         }
     }