api: handle json in engine error messages

Author: alecananian

apps/api/src/utils/error.test.ts

@@ -42,5 +42,12 @@ describe("error utils", () => {
     expect(normalizeEngineErrorMessage("Unknown Error - test error")).toBe(
       "Unknown Error - test error",
     );
+    expect(
+      normalizeEngineErrorMessage(
+        '{"code":3,"message":"failed with 50004597 gas: insufficient funds for gas * price + value: address 0xafCB379C0B76265bCb8432ab776A2641F0355Eb3 have 0 want 100000000000000"}',
+      ),
+    ).toBe(
+      "failed with 50004597 gas: insufficient funds for gas * price + value: address 0xafCB379C0B76265bCb8432ab776A2641F0355Eb3 have 0 want 100000000000000",
+    );
   });
 });

apps/api/src/utils/error.ts

@@ -57,8 +57,17 @@ const ENGINE_ERROR_MESSAGE_MAP = {
 } as const;
 
 export const normalizeEngineErrorMessage = (rawMessage: string) => {
+  try {
+    const error: object = JSON.parse(rawMessage);
+    if ("message" in error && typeof error.message === "string") {
+      return error.message;
+    }
+  } catch {
+    // Ignore error if message wasn't valid JSON and try regular expression matches instead
+  }
+
   const groups =
-    /(?:reason: '(.*?)' at)|(?:reason="execution reverted: (.*?)")|(?:eth_sendUserOperation error: {"message":"(.*?)"|(?:Simulation failed: TransactionError: Error - (.*))|(?:^Simulation failed: (.*))|(?:^Error - (.*)))/gi.exec(
+    /(?:reason: '(.*?)' at)|(?:reason="execution reverted: (.*?)")|(?:eth_sendUserOperation error: {"message":"(.*?)")|(?:Simulation failed: TransactionError: Error - (.*))|(?:^Simulation failed: (.*))|(?:^Error - (.*))/gi.exec(
       rawMessage,
     );
   const message = groups?.slice(1).find((group) => group) ?? rawMessage;