change ProverResult.to_json() to return string instead of JsValue;

Author: greenhat

bindings/ergo-lib-wasm/src/prover_result.rs

@@ -23,8 +23,9 @@ impl ProverResult {
         self.0.extension.clone().into()
     }
 
-    /// JSON representation
-    pub fn to_json(&self) -> Result<JsValue, JsValue> {
-        JsValue::from_serde(&self.0.clone()).map_err(|e| JsValue::from_str(&format!("{}", e)))
+    /// JSON representation as text (compatible with Ergo Node/Explorer API, numbers are encoded as numbers)
+    pub fn to_json(&self) -> Result<String, JsValue> {
+        serde_json::to_string_pretty(&self.0.clone())
+            .map_err(|e| JsValue::from_str(&format!("{}", e)))
     }
 }