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sc-consensus-beefy: fix initialization when state is unavailable (#1888)
Adrian Catangiu authored 
Fix situation where BEEFY initial validator set could not be determined.

If state is unavailable at BEEFY genesis block to get initial validator
set, get the info from header digests. For this, we need to walk back
the chain starting from BEEFY genesis looking for the BEEFY digest
announcing the active validator set for that respective session.

This commit fixes a silly bug where walking back the chain was stopped
when reaching BEEFY genesis block, which is incorrect when BEEFY genesis
is not session boundary block. When BEEFY genesis is set to some random
block within a session, we need to walk back to the start of the session
to see the validator set announcement.

Added regression test for this fix.

Fixes https://github.com/paritytech/polkadot-sdk/issues/1885

Signed-off-by: default avatarAdrian Catangiu <adrian@parity.io>
646ecd0e
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.cargo
.config
.github
.gitlab
bridges
cumulus
docker
docs
polkadot
prdoc
scripts
substrate
.gitignore
.gitlab-ci.yml
.rustfmt.toml
BRIDGES.md
Cargo.lock
Cargo.toml
README.md
README.md

NOTE: We have recently made significant changes to our repository structure. In order to streamline our development process and foster better contributions, we have merged three separate repositories Cumulus, Substrate and Polkadot into this repository. Read more about the changes here.

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Implementation of a node for the https://polkadot.network in Rust, using the Substrate framework. This directory currently contains runtimes for the Polkadot, Kusama, Westend, and Rococo networks. In the future, these will be relocated to the runtimes repository.

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