From 988c6428165e85e58e5b73823a48dcf2089788a6 Mon Sep 17 00:00:00 2001
From: pcw109550 <pcw109550@gmail.com>
Date: Mon, 5 Feb 2024 13:28:30 +0900
Subject: [PATCH] Delegatecall

---
 rvsol/src/Step.sol | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/rvsol/src/Step.sol b/rvsol/src/Step.sol
index a62b702b..aa77e6c9 100644
--- a/rvsol/src/Step.sol
+++ b/rvsol/src/Step.sol
@@ -780,7 +780,9 @@ contract Step {
                 mstore(add(memPtr, 0x04), preImageKey)
                 mstore(add(memPtr, 0x24), localContext_)
                 let cgas := 100000 // TODO change call gas
-                let res := call(cgas, addr, 0, memPtr, 0x44, 0x00, 0x20) // output into scratch space
+                // we now use delegatecall to preserve caller.
+                // TODO: refactor ORACLE using library
+                let res := delegatecall(cgas, addr, memPtr, 0x44, 0x00, 0x20) // output into scratch space
                 if res { // 1 on success
                     localizedKey := mload(0x00)
                 }