Make test op memory work again (#2236)

* Remove crufty `pruneTrie` arguments

* Replaced legacy `distinct_trie` logic by new `ledger` functionality

why:
  The module `distinct_trie` is supported by `Aristo` in trivial cases.

* Activate `test_op_memory`

nimbus/db/ledger/accounts_ledger.nim

@@ -137,9 +137,9 @@ template noRlpException(info: static[string]; code: untyped) =
 
 # The AccountsLedgerRef is modeled after TrieDatabase for it's transaction style
 proc init*(x: typedesc[AccountsLedgerRef], db: CoreDbRef,
-           root: KeccakHash, pruneTrie = true): AccountsLedgerRef =
+           root: KeccakHash): AccountsLedgerRef =
   new result
-  result.ledger = AccountLedger.init(db, root, pruneTrie)
+  result.ledger = AccountLedger.init(db, root)
   result.kvt = db.newKvt() # save manually in `persist()`
   result.witnessCache = initTable[EthAddress, WitnessData]()
   discard result.beginSavepoint

nimbus/db/ledger/distinct_ledgers.nim

@@ -119,19 +119,18 @@ proc init*(
     T: type AccountLedger;
     db: CoreDbRef;
     root: Hash256;
-    pruneOk = true;
       ): T =
   const
     info = "AccountLedger.init(): "
   let
     ctx = db.ctx
-    trie = block:
+    col = block:
       let rc = ctx.newColumn(CtAccounts, root)
       if rc.isErr:
         raiseAssert info & $$rc.error
       rc.value
     mpt =  block:
-      let rc = ctx.getAcc(trie)
+      let rc = ctx.getAcc(col)
       if rc.isErr:
         raiseAssert info & $$rc.error
       rc.value
@@ -170,14 +169,9 @@ proc init*(
     al: AccountLedger;
     account: CoreDbAccount;
     reHashOk = true;
-    pruneOk = false;
       ): T =
   ## Storage trie constructor.
   ##
-  ## Note that the argument `pruneOk` should be left `false` on the legacy
-  ## `CoreDb` backend. Otherwise, pruning might kill some unwanted entries from
-  ## storage tries ending up with an unstable database leading to crashes (see
-  ## https://github.com/status-im/nimbus-eth1/issues/932.)
   const
     info = "StorageLedger/init(): "
   let
@@ -191,7 +185,7 @@ proc init*(
     ctx = db.ctx
     trie = if stt.isNil: ctx.newColumn(account.address) else: stt
     mpt = block:
-      let rc = ctx.getMpt(trie, pruneOk)
+      let rc = ctx.getMpt(trie)
       if rc.isErr:
         raiseAssert info & $$rc.error
       rc.value

tests/all_tests.nim

@@ -28,7 +28,7 @@ cliBuilder:
           ./test_op_arith,
           ./test_op_bit,
           ./test_op_env,
-          #./test_op_memory,                       -- fails
+          ./test_op_memory,
           ./test_op_misc,
           ./test_op_custom,
           #./test_state_db,                        -- does not compile

tests/macro_assembler.nim

@@ -17,13 +17,16 @@ import
   stew/shims/macros
 
 import
-  ../nimbus/db/[ledger, distinct_tries],
+  ../nimbus/db/ledger,
   ../nimbus/evm/types,
   ../nimbus/vm_internals,
   ../nimbus/transaction/[call_common, call_evm],
   ../nimbus/[vm_types, vm_state],
   ../nimbus/core/pow/difficulty
 
+from ../nimbus/db/aristo
+  import EmptyBlob
+
 # Ditto, for GasPrice.
 import ../nimbus/transaction except GasPrice
 import ../tools/common/helpers except LogLevel
@@ -63,15 +66,6 @@ type
 
 const
   idToOpcode = CacheTable"NimbusMacroAssembler"
-var
-  coreDbType* = DefaultDbMemory
-    ## This variable needs to be accessible for unit tests like
-    ## `test_op_memory` which implicitely uses the `initStorageTrie()` call
-    ## from the `distinct_tries` module. The `Aristo` API cannot handle that
-    ## because it needs the account address for accessing the storage trie.
-    ##
-    ## This problem can be fixed here in the `verifyAsmResult()` function once
-    ## there is the time to do it ...
 
 static:
   for n in Op:
@@ -278,11 +272,7 @@ const
 proc initVMEnv*(network: string): BaseVMState =
   let
     conf = getChainConfig(network)
-    cdb = block:
+    cdb = DefaultDbMemory.newCoreDbRef()
-      # Need static binding
-      case coreDbType:
-      of AristoDbMemory: newCoreDbRef AristoDbMemory
-      else: raiseAssert "unsupported: " & $coreDbType
     com = CommonRef.new(
       cdb,
       conf,
@@ -345,15 +335,18 @@ proc verifyAsmResult(vmState: BaseVMState, boa: Assembler, asmResult: CallResult
 
   var stateDB = vmState.stateDB
   stateDB.persist()
-  var
+
-    storageRoot = stateDB.getStorageRoot(codeAddress)
+  let
-    trie = initStorageTrie(com.db, storageRoot)
+    al = AccountLedger.init(com.db, EMPTY_ROOT_HASH)
+    acc = al.fetch(codeAddress).expect "Valid Account Handle"
+    sl = StorageLedger.init(al, acc)
 
   for kv in boa.storage:
     let key = kv[0].toHex()
     let val = kv[1].toHex()
-    let keyBytes = (@(kv[0]))
+    let slot = UInt256.fromBytesBE kv[0]
-    let actual = trie.getSlotBytes(keyBytes).toHex()
+    let data = sl.fetch(slot).valueOr: EmptyBlob
+    let actual = data.toHex
     let zerosLen = 64 - (actual.len)
     let value = repeat('0', zerosLen) & actual
     if val != value: