From fac1741b50d26ad5c57565d219a28b2dca5dfc6c Mon Sep 17 00:00:00 2001
From: Fabio Di Fabio <fabio.difabio@consensys.net>
Date: Wed, 11 Dec 2024 14:07:00 +0100
Subject: [PATCH] Using Supplier to make the authorizer thread safe

Signed-off-by: Fabio Di Fabio <fabio.difabio@consensys.net>
---
 .../besu/ethereum/core/CodeDelegation.java            | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/core/CodeDelegation.java b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/core/CodeDelegation.java
index ef38a982224..ecf1da973f3 100644
--- a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/core/CodeDelegation.java
+++ b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/core/CodeDelegation.java
@@ -42,8 +42,8 @@ public class CodeDelegation implements org.hyperledger.besu.datatypes.CodeDelega
   private final Address address;
   private final long nonce;
   private final SECPSignature signature;
-  private Optional<Address> authorizer = Optional.empty();
-  private boolean isAuthorityComputed = false;
+  private final Supplier<Optional<Address>> authorizerSupplier =
+      Suppliers.memoize(this::computeAuthority);
 
   /**
    * An access list entry as defined in EIP-7702
@@ -107,12 +107,7 @@ public SECPSignature signature() {
 
   @Override
   public Optional<Address> authorizer() {
-    if (!isAuthorityComputed) {
-      authorizer = computeAuthority();
-      isAuthorityComputed = true;
-    }
-
-    return authorizer;
+    return authorizerSupplier.get();
   }
 
   @Override