From 8c969f21e3abb74ac77151d58ccdc934181e3c50 Mon Sep 17 00:00:00 2001
From: jagdeep sidhu <sidhujag@syscoin.org>
Date: Thu, 10 Oct 2024 21:13:03 -0700
Subject: [PATCH] rm unused key and cache

---
 core/headerchain.go  | 3 ---
 core/rawdb/schema.go | 6 ------
 2 files changed, 9 deletions(-)

diff --git a/core/headerchain.go b/core/headerchain.go
index cb52014b08..81c77ccf36 100644
--- a/core/headerchain.go
+++ b/core/headerchain.go
@@ -70,7 +70,6 @@ type HeaderChain struct {
 	tdCache     *lru.Cache[common.Hash, *big.Int] // most recent total difficulties
 	numberCache *lru.Cache[common.Hash, uint64]   // most recent block numbers
 	// SYSCOIN
-	NEVMCache     *lru.Cache[common.Hash, []byte] // Cache for NEVM blocks existing
 	SYSHashCache  *lru.Cache[uint64, []byte] // Cache for SYS hash
 	DataHashCache *lru.Cache[common.Hash, []byte] // Cache for Data availability
 	NEVMAddressCache *rawdb.NEVMAddressMapping
@@ -90,7 +89,6 @@ func NewHeaderChain(chainDb ethdb.Database, config *params.ChainConfig, engine c
 		// SYSCOIN
 		SYSHashCache:  lru.NewCache[uint64, []byte](SYSBlockCacheLimit),
 		DataHashCache: lru.NewCache[common.Hash, []byte](SYSBlockCacheLimit),
-		NEVMCache:     lru.NewCache[common.Hash, []byte](headerCacheLimit),
 		procInterrupt: procInterrupt,
 		engine:        engine,
 	}
@@ -718,7 +716,6 @@ func (hc *HeaderChain) setHead(headBlock uint64, headTime uint64, updateFn Updat
 	hc.numberCache.Purge()
 	// SYSCOIN
 	hc.SYSHashCache.Purge()
-	hc.NEVMCache.Purge()
 	hc.DataHashCache.Purge()
 }
 
diff --git a/core/rawdb/schema.go b/core/rawdb/schema.go
index 8ebb27a59e..d21a5d0a48 100644
--- a/core/rawdb/schema.go
+++ b/core/rawdb/schema.go
@@ -115,7 +115,6 @@ var (
 	skeletonHeaderPrefix  = []byte("S") // skeletonHeaderPrefix + num (uint64 big endian) -> header
 
 	// SYSCOIN
-	nevmToSysPrefix        = []byte("x") // nevmToSysPrefix + nevm block hash -> nevmBlock
 	blockNumToSysKeyPrefix = []byte("z") // blockNumToSysKeyPrefix + block number -> SYS block hash
 	dataHashesKeyPrefix    = []byte("y") // dataHashesKeyPrefix + block number -> versioned hashes
 	dataHashKeyPrefix      = []byte("w") // dataHashKeyPrefix + versioned hash -> versioned hash
@@ -356,11 +355,6 @@ func IsStorageTrieNode(key []byte) bool {
 }
 
 // SYSCOIN
-// nevmToSysKey = nevmToSysPrefix + hash
-func nevmToSysKey(hash common.Hash) []byte {
-    return append(nevmToSysPrefix, hash.Bytes()...)
-}
-
 // blockNumToSysKey = blockNumToSysKeyPrefix + blocknumber
 func blockNumToSysKey(n uint64) []byte {
     return append(blockNumToSysKeyPrefix, []byte(new(big.Int).SetUint64(n).String())...)