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1502014e36
* Kvt: Update API hooks * Aristo: Generalised merging snap proofs, now for multiple state roots why: This accommodates pre-loading partial tries for unit tests * Aristo: Update some unit tests * CoreDb+Aristo: Re-factor tracer why: Was bonkers anyway. The main change is that the trace journal is now kept in a way similar to a transaction layer so that it can predictably interact with DB transactions. * Ledger: Debugging helper * Update tracer unit test applicable for `Aristo` * Fix copyright year * Disable `dump()` function as compile time default why: This needs to pull in the `rocks_db` library at compile time.
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
| | |
| | +--- CoreDbCtxRef -- MPT context 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 legacy 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