14c3772545
* rebased from `github/on-demand-mpt` ackn: wip: on-demand mpt construction Given that actual data is stored in the `Vertex` structure, it's useful to think of the MPT as a cache for computing roots rather than being a functional requirement on its own. This PR engenders this line of thinking by incrementally computing the MPT only when it's needed, ie when a state (or similar) root is needed. This has the effect of siginficantly reducing memory usage as well as improving performance: * no need for dirty-mpt-node book-keeping * no need to build complex forest of upcoming hashing work * only hashes that are functionally needed are ever computed - intermediate nodes whose MTP root is not observed are never computed / processed * Unit test hot fixes * Unit test hot fixes cont. (somehow lost that part) --------- Co-authored-by: Jacek Sieka <jacek@status.im> |
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|---|---|---|
| .. | ||
| base | ||
| README.md | ||
| accounts_ledger.nim | ||
| base.nim | ||
| base_iterators.nim | ||
README.md
The file accounts_cache.nim has been relocated
Background
The new LedgerRef module unifies different implementations of the legacy accounts_cache. It is intended to be used as new base method for all of the AccountsCache implementations. The legacy accounts_cache version has been removed.
This was needed to accomodate for different CoreDb API paradigms. While the overloaded legacy AccountsCache implementation is just a closure based wrapper around the accounts_cache module, the overloaded AccountsLedgerRef is a closure based wrapper around the accounts_ledger module with the new CoreDb API returning Result[] values and saparating the meaning of trie root hash and trie root reference.
This allows to use the legacy hexary database (with the new CoreDb API) as well as the Aristo database (only supported on new API.)
Instructions
| Legacy notation | LedgerRef replacement | Comment |
|---|---|---|
| import accounts_cache | import ledger | preferred method, |
| AccountsCache.init(..) | AccountsCache.init(..) | wraps AccountsCache |
| methods | ||
| or | ||
| import ledger/accounts_cache | stay with legacy | |
| AccountsCache.init(..) | version of | |
| AccountsCache | ||
| -- | ||
| fn(ac: AccountsCache) | fn(ac: LedgerRef) | function example for |
| preferred wrapper | ||
| or | method | |
| fn(ac: AccountsCache) | with legacy version, | |
| no change here |
The constructor decides which CoreDb API is to be used
| Legacy API constructor | new API Constructor |
|---|---|
| import ledger | import ledger |
| let w = AccountsCache.init(..) | let w = AccountsLedgerRef.init(..) |