Commit graph

15 commits

Author SHA1 Message Date
Roman Khimov
c5f1e2fbcd mpt: don't allocate for every key
Microoptimization.
2022-02-11 14:19:54 +03:00
Roman Khimov
c4ee310e85 mpt: modify refcounted storage scheme to make GC possible
Add "active" flag into the node data and make the remainder modal, for active
nodes it's a reference counter, for inactive ones the deactivation height is
stored.

Technically, refcounted chains storing just one trie don't need a flag, but
it's a bit simpler this way.
2022-02-10 21:56:20 +03:00
Roman Khimov
86cb4ed80f mpt: add the notion of MPT mode
It directly affects the storage format, so it's important. ModeGC is not used
at the moment, but defined for future extensibility.
2022-02-10 19:15:18 +03:00
Roman Khimov
2bc493a839 mpt: simplify makeStorageKey() interface 2022-02-08 12:38:03 +03:00
Anna Shaleva
43ac4e1517 rpc: implement findstates RPC handler 2021-10-13 11:41:05 +03:00
Anna Shaleva
f721384ead core: allow empty MPT Leaf values
Allow it for (*Trie).Put. And distinguish empty value and nil value for
(*Trie).PutBatch, because batch is already capable of handling both nil
and empty value. For (*Trie).PutBatch putting nil value means deletion,
while putting empty value means just putting LeafNode with an empty
value.
2021-09-03 13:46:48 +03:00
Evgeniy Stratonikov
db80ef28df mpt: move empty hash node in a separate type
We use them quite frequently (consider children for a new branch
node) and it is better to get rid of unneeded allocations.

Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
2021-08-06 12:01:16 +03:00
Evgeniy Stratonikov
25428d53f1 mpt: strip branch node in a simple implementation
Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
2021-07-07 15:47:07 +03:00
Evgeniy Stratonikov
e833d333fe mpt: disallow empty keys
This is not a problem in practice, as all keys are prefixed
by a contract ID. However in theory it can lead to a different
state root after new portion of changes thus this fix.
2021-06-04 11:09:17 +03:00
Evgeniy Stratonikov
5b1f6207de mpt: reduce max key length
The constant used is actually a nibbled-path restriction.
Clarify this and make them private.
2021-06-04 11:09:17 +03:00
Evgeniy Stratonikov
0cb6ec7345 mpt: allow to remove non-existent keys in batch
This bug was here before batch were intoduced.
`Delete` is allowed to be called on missing keys with
HALT result, MPT needs to take this into account.
2021-02-17 12:37:44 +03:00
Evgenii Stratonikov
7d91a3a89e pkg: move internal/ package to the root directory
This way we can use it in scripts and cli.
2020-11-24 16:39:56 +03:00
Evgenii Stratonikov
85f927d892 mpt: implement reference counting
Also postpone MPT initialization until `storeBlock`
because we need to read-and-check or save info about refcounting
depending on starting height.
2020-11-20 16:50:30 +03:00
Evgenii Stratonikov
6ca22027d5 mpt: implement (*Trie).Collapse()
Because trie size is rather big, it can't be stored in memory.
Thus some form of caching should also be implemented. To avoid
marshaling/unmarshaling of items which are close to root and are used
very frequenly we can save them across the persists.
This commit implements pruning items at the specified depth,
replacing them by hash nodes.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2020-07-30 12:42:15 +03:00
Evgenii Stratonikov
dc6741bce7 mpt: implement MPT trie
MPT is a trie with a branching factor = 16, i.e. it consists of sequences in
16-element alphabet.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2020-07-30 12:42:15 +03:00