From 0c4e78e2bc2fc186a81fa18b449a2b31d7d643b8 Mon Sep 17 00:00:00 2001
From: Nicholas Rodrigues Lordello <n@lordello.net>
Date: Fri, 25 Jul 2025 11:45:41 +0200
Subject: [PATCH] Fix `eth_call` Gas Parameter Serialization

Fix the `gas` field serialization in `_simulateHandleOps` to use a
"QUANTITY", that is a hex-encoded string with no leading 0's, instead
of a number.

This was causing errors when using Geth with `--unsafe` mode.
---
 packages/validation-manager/src/ValidationManager.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/validation-manager/src/ValidationManager.ts b/packages/validation-manager/src/ValidationManager.ts
index 71f04f09..3cbe9a41 100644
--- a/packages/validation-manager/src/ValidationManager.ts
+++ b/packages/validation-manager/src/ValidationManager.ts
@@ -1,5 +1,6 @@
 import { BigNumber, BigNumberish } from 'ethers'
 
+import { hexValue } from '@ethersproject/bytes'
 import { JsonRpcProvider } from '@ethersproject/providers'
 import Debug from 'debug'
 
@@ -215,7 +216,7 @@ export class ValidationManager implements IValidationManager {
       to: this.entryPoint.address,
       data,
       authorizationList: userOp.eip7702Auth == null ? null : [userOp.eip7702Auth],
-      gas: sum(prevg, userOp.verificationGasLimit, userOp.paymasterVerificationGasLimit).toNumber()
+      gas: hexValue(sum(prevg, userOp.verificationGasLimit, userOp.paymasterVerificationGasLimit))
     }
 
     try {