Sam Johnson
b83bf4784e
* globally upgrade quote to latest 1.0.x (1.0.26) * globally upgrade syn to final 1.0.x version (1.0.109) * globally upgrade proc-macro2 to 1.0.56 * upgrade to syn v2.0.13 and fix everything except NestedMeta * fix parse nested metadata code in decl_runtime_apis.rs * Port more stuff to syn 2.0 * Make the rest compile * Ignore error * update to syn 2.0.14 --------- Co-authored-by: Bastian Köcher <info@kchr.de>
State database maintenance. Handles canonicalization and pruning in the database. The input to
this module is a ChangeSet which is basically a list of key-value pairs (trie nodes) that
were added or deleted during block execution.
Canonicalization.
Canonicalization window tracks a tree of blocks identified by header hash. The in-memory overlay allows to get any node that was inserted in any of the blocks within the window. The tree is journaled to the backing database and rebuilt on startup. Canonicalization function selects one root from the top of the tree and discards all other roots and their subtrees.
Pruning.
See RefWindow for pruning algorithm details. StateDb prunes on each canonicalization until pruning
constraints are satisfied.
License: GPL-3.0-or-later WITH Classpath-exception-2.0