fix eth_estimateGas

libs/remix-simulator/src/methods/transactions.ts

@@ -145,7 +145,10 @@ export class Transactions {
           return cb(e.message)
         }
       }
-      const gasUsed = result.result.execResult.gasUsed.toNumber()
+      let gasUsed = result.result.execResult.gasUsed.toNumber()
+      if (result.result.execResult.gasRefund) {
+        gasUsed += result.result.execResult.gasRefund.toNumber()
+      }
       cb(null, Math.ceil(gasUsed + (15 * gasUsed) / 100))
     })
   }