bigint support in logger

Author: o-on-x

packages/core/src/logger.ts

@@ -77,12 +77,20 @@ class ElizaLogger {
         const c = this.#getColor(foregroundColor, backgroundColor);
         // turns objects into printable strings
         strings = strings.map((item) => {
-            if (typeof item === "object") item = JSON.stringify(item);
+            if (typeof item === "object") {
+                // Handle BigInt serialization
+                return JSON.stringify(item, (key, value) => 
+                    typeof value === 'bigint' 
+                        ? value.toString() 
+                        : value
+                );
+            }
             return item;
         });
         console.log(c, strings.join(""), this.#getColorReset());
         if (this.closeByNewLine) console.log("");
     }
+    
     log(...strings) {
         const fg = "white";
         const bg = "";