From d1ab073aad19fbc6264df82f2d6699c31588ffef Mon Sep 17 00:00:00 2001
From: advaita-saha <adv11sphs@gmail.com>
Date: Mon, 6 May 2024 23:18:09 +0530
Subject: [PATCH] upstream verkle to ledger backend

---
 nimbus/db/ledger/backend/accounts_cache.nim      | 10 +++++-----
 nimbus/db/ledger/backend/accounts_cache_desc.nim |  2 +-
 nimbus/db/ledger/verkle_accounts_cache.nim       | 14 +++++++++++++-
 3 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/nimbus/db/ledger/backend/accounts_cache.nim b/nimbus/db/ledger/backend/accounts_cache.nim
index f3822860a..04db8abdb 100644
--- a/nimbus/db/ledger/backend/accounts_cache.nim
+++ b/nimbus/db/ledger/backend/accounts_cache.nim
@@ -14,7 +14,7 @@ import
   eth/common,
   ../../../../stateless/multi_keys,
   "../.."/[core_db, distinct_tries],
-  ../accounts_cache as impl,
+  ../verkle_accounts_cache as impl,
   ".."/[base, base/base_desc],
   ./accounts_cache_desc as wrp
 
@@ -51,7 +51,7 @@ proc ledgerMethods(lc: impl.AccountsCache): LedgerFns =
       lc.addLogEntry(log),
 
     beginSavepointFn: proc(): LedgerSpRef =
-      wrp.SavePoint(sp: lc.beginSavepoint()),
+      wrp.SavePoint(sp: lc.beginSavePoint()),
 
     clearStorageFn: proc(eAddr: EthAddress) =
       lc.clearStorage(eAddr),
@@ -184,7 +184,7 @@ proc ledgerMethods(lc: impl.AccountsCache): LedgerFns =
 proc ledgerExtras(lc: impl.AccountsCache): LedgerExtras =
   LedgerExtras(
     getMptFn: proc(): CoreDbMptRef =
-      lc.rawTrie.mpt,
+      lc.rawTrie.mpt,                                                 # -----------> needs to be fixed, MPT doesn't exist anymore
 
     rawRootHashFn: proc(): Hash256 =
       lc.rawTrie.rootHash())
@@ -195,7 +195,7 @@ proc newLegacyAccountsCache(
     root: Hash256;
     pruneTrie: bool): LedgerRef =
   ## Constructor
-  let lc = impl.AccountsCache.init(db, root, pruneTrie)
+  let lc = impl.AccountsCache.init()
   wrp.AccountsCache(
     ldgType:   LegacyAccountsCache,
     ac:        lc,
@@ -231,7 +231,7 @@ iterator storageIt*(
       ): (UInt256,UInt256)
       {.gcsafe, raises: [CoreDbApiError].} =
   noRlpException "storage()":
-    for w in lc.ac.storage(eAddr):
+    for w in lc.ac.storage(eAddr):                                         # -----------> needs to be fixed, storage() doesn't exist yet 
       yield w
 
 # ------------------------------------------------------------------------------
diff --git a/nimbus/db/ledger/backend/accounts_cache_desc.nim b/nimbus/db/ledger/backend/accounts_cache_desc.nim
index 2e9d026d9..624b5054f 100644
--- a/nimbus/db/ledger/backend/accounts_cache_desc.nim
+++ b/nimbus/db/ledger/backend/accounts_cache_desc.nim
@@ -9,7 +9,7 @@
 # according to those terms.
 
 import
-  ../accounts_cache as impl,
+  ../verkle_accounts_cache as impl,
   ../base/base_desc
 
 type
diff --git a/nimbus/db/ledger/verkle_accounts_cache.nim b/nimbus/db/ledger/verkle_accounts_cache.nim
index 280f387ed..349cfdc11 100644
--- a/nimbus/db/ledger/verkle_accounts_cache.nim
+++ b/nimbus/db/ledger/verkle_accounts_cache.nim
@@ -119,7 +119,7 @@ proc rawTrie*(ac: AccountsCache): VerkleTrie {.inline.} = ac.trie
 proc init*(x: typedesc[AccountsCache]): AccountsCache =
   new result
   result.trie = initVerkleTrie()
-  result.witnessCache = initTable[EthAddress, WitnessData]
+  result.witnessCache = initTable[EthAddress, WitnessData]()
   discard result.beginSavePoint
 
 proc rootHash*(ac: AccountsCache): KeccakHash =
@@ -261,6 +261,18 @@ proc storageValue(acc: RefAccount, address: EthAddress, slot: UInt256, db: Verkl
   do:
     result = acc.originalStorageValue(address, slot, db)
 
+proc getCommittedStorage*(ac: AccountsCache, address: EthAddress, slot: UInt256): UInt256 {.inline.} =
+  let acc = ac.getAccount(address, false)
+  if acc.isNil:
+    return
+  acc.originalStorageValue(address, slot, ac.trie)
+
+proc getStorage*(ac: AccountsCache, address: EthAddress, slot: UInt256): UInt256 {.inline.} =
+  let acc = ac.getAccount(address, false)
+  if acc.isNil:
+    return
+  acc.storageValue(address, slot, ac.trie)
+
 proc kill(acc: RefAccount) =
   acc.flags.excl Alive
   acc.overlayStorage.clear()