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* CoreDb: Test module with additional sample selector cmd line options * Aristo: Do not automatically remove a storage trie with the account why: This is an unnecessary side effect. Rather than using an automatism, a a storage root must be deleted manually. * Aristo: Can handle stale storage root vertex IDs as empty IDs. why: This is currently needed for the ledger API supporting both, a legacy and the `Aristo` database backend. This feature can be disabled at compile time by re-setting the `LOOSE_STORAGE_TRIE_COUPLING` flag in the `aristo_constants` module. * CoreDb+Aristo: Flush/delete storage trie when deleting account why: On either backend, a deleted account leave a dangling storage trie on the database. For consistency nn the legacy backend, storage tries must not be deleted as they might be shared by several accounts whereas on `Aristo` they are always unique.
Core database replacement wrapper object
This wrapper replaces the TrieDatabaseRef and its derivatives by the new object CoreDbRef.
Relations to current TrieDatabaseRef implementation
Here are some incomplete translations for objects and constructors.
Object types:
| Legacy notation | CoreDbRef based replacement |
|---|---|
| ChainDB | (don't use/avoid) |
| ChainDbRef | CoreDbRef |
| TrieDatabaseRef | CoreDbKvtRef |
| HexaryTrie | CoreDbMptRef |
| SecureHexaryTrie | CoreDbPhkRef |
| DbTransaction | CoreDbTxRef |
| TransactionID | CoreDbTxID |
Constructors:
| Legacy notation | CoreDbRef based replacement |
|---|---|
| trieDB newChainDB("..") | newCoreDbRef(LegacyDbPersistent,"..") |
| newMemoryDB() | newCoreDbRef(LegacyDbMemory) |
| -- | |
| initHexaryTrie(db,..) | db.mpt(..) (no pruning) |
| db.mptPrune(..) (w/pruning true/false) | |
| -- | |
| initSecureHexaryTrie(db,..) | db.phk(..) (no pruning) |
| db.phkPrune(..) (w/pruning true/false) | |
| -- | |
| newCaptureDB(db,memDB) | db.capture() (see below) |
Usage of the replacement wrapper
Objects pedigree:
CoreDbRef -- base descriptor
| | | |
| | | +-- CoreDbMptRef -- hexary trie instance
| | | | : :
| | | +-- CoreDbMptRef -- hexary trie instance
| | |
| | |
| | +---- CoreDbPhkRef -- pre-hashed key hexary trie instance
| | | : :
| | +---- CoreDbPhkRef -- pre-hashed key hexary trie instance
| |
| |
| +------ CoreDbKvtRef -- single static key-value table
|
|
+-------- CoreDbCaptRef -- tracer support descriptor
Instantiating standard database object descriptors works as follows:
let
db = newCoreDbRef(..) # new base descriptor
mpt = db.mpt(..) # hexary trie/Merkle Patricia Tree
phk = db.phk(..) # pre-hashed key hexary trie/MPT
kvt = db.kvt # key-value table
Tracer support setup by hiding the current CoreDbRef behind a replacement:
let
capture = db.capture()
db = capture.recorder # use the recorder in place of db
...
for key,value in capture.recorder.kvt:
... # process recorded data