From 7950eb9d7dc6fba7eed1c9970373e772f59bb43c Mon Sep 17 00:00:00 2001
From: Felipe Andrade <felipe@oplabs.co>
Date: Thu, 18 May 2023 15:41:01 -0700
Subject: [PATCH 1/2] fix(proxyd): clean up cache initialization

---
 proxyd/proxyd/config.go |  4 +---
 proxyd/proxyd/proxyd.go | 16 ----------------
 2 files changed, 1 insertion(+), 19 deletions(-)

diff --git a/proxyd/proxyd/config.go b/proxyd/proxyd/config.go
index 2edd5f9..0e75769 100644
--- a/proxyd/proxyd/config.go
+++ b/proxyd/proxyd/config.go
@@ -26,9 +26,7 @@ type ServerConfig struct {
 }
 
 type CacheConfig struct {
-	Enabled               bool   `toml:"enabled"`
-	BlockSyncRPCURL       string `toml:"block_sync_rpc_url"`
-	NumBlockConfirmations int    `toml:"num_block_confirmations"`
+	Enabled bool `toml:"enabled"`
 }
 
 type RedisConfig struct {
diff --git a/proxyd/proxyd/proxyd.go b/proxyd/proxyd/proxyd.go
index b145b15..afb27bc 100644
--- a/proxyd/proxyd/proxyd.go
+++ b/proxyd/proxyd/proxyd.go
@@ -9,7 +9,6 @@ import (
 	"time"
 
 	"github.com/ethereum/go-ethereum/common/math"
-	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/go-redis/redis/v8"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
@@ -206,27 +205,12 @@ func Start(config *Config) (*Server, func(), error) {
 		rpcCache RPCCache
 	)
 	if config.Cache.Enabled {
-		if config.Cache.BlockSyncRPCURL == "" {
-			return nil, nil, fmt.Errorf("block sync node required for caching")
-		}
-		blockSyncRPCURL, err := ReadFromEnvOrConfig(config.Cache.BlockSyncRPCURL)
-		if err != nil {
-			return nil, nil, err
-		}
-
 		if redisClient == nil {
 			log.Warn("redis is not configured, using in-memory cache")
 			cache = newMemoryCache()
 		} else {
 			cache = newRedisCache(redisClient, config.Redis.Namespace)
 		}
-		// Ideally, the BlocKSyncRPCURL should be the sequencer or a HA replica that's not far behind
-		ethClient, err := ethclient.Dial(blockSyncRPCURL)
-		if err != nil {
-			return nil, nil, err
-		}
-		defer ethClient.Close()
-
 		rpcCache = newRPCCache(newCacheWithCompression(cache))
 	}
 

From 5616f40a162432aeca01d6b301d67f745709776f Mon Sep 17 00:00:00 2001
From: Felipe Andrade <felipe@oplabs.co>
Date: Thu, 18 May 2023 16:30:33 -0700
Subject: [PATCH 2/2] also remove from config files

---
 proxyd/proxyd/integration_tests/testdata/caching.toml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/proxyd/proxyd/integration_tests/testdata/caching.toml b/proxyd/proxyd/integration_tests/testdata/caching.toml
index 246a16e..f3c1327 100644
--- a/proxyd/proxyd/integration_tests/testdata/caching.toml
+++ b/proxyd/proxyd/integration_tests/testdata/caching.toml
@@ -10,8 +10,6 @@ namespace = "proxyd"
 
 [cache]
 enabled = true
-block_sync_rpc_url = "$GOOD_BACKEND_RPC_URL"
-
 
 [backends]
 [backends.good]