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This PR adds support for fetching the closest merkle value of some key. Builds on top of - https://github.com/paritytech/trie/pull/199 Migrates https://github.com/paritytech/substrate/pull/14818 to the monorepo. Closes: https://github.com/paritytech/substrate/issues/14550 Closes: https://github.com/paritytech/polkadot-sdk/issues/1506 // @paritytech/subxt-team --------- Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> Co-authored-by: Sebastian Kunert <skunert49@gmail.com>
Client backend that is backed by a database.
Canonicality vs. Finality
Finality indicates that a block will not be reverted, according to the consensus algorithm, while canonicality indicates that the block may be reverted, but we will be unable to do so, having discarded heavy state that will allow a chain reorganization.
Finality implies canonicality but not vice-versa.
License: GPL-3.0-or-later WITH Classpath-exception-2.0