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babe: support online configuration upgrades (#5514)

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* babe: support online configuration upgrades

* Switch to use NextConfigDescriptor instead of changing runtime interface

* Fix tests

* epoch-changes: map function that allows converting with different epoch types

* Add migration script for the epoch config change

* Fix migration tests

* Fix migration: Epoch should be EpochV0

* Update client/consensus/babe/src/lib.rs

Co-Authored-By: André Silva <123550+andresilva@users.noreply.github.com>

* Fix new epochChanges version

* Fix unused imports

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>
This commit is contained in:
Wei Tang
2020-04-24 15:59:14 +02:00
committed by GitHub
parent a01e608dff
commit 770cc24c47
12 changed files with 300 additions and 86 deletions
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substrate/bin/node/runtime/src/lib.rs
+2 -2
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@@ -791,13 +791,13 @@ impl_runtime_apis! {
}
impl sp_consensus_babe::BabeApi<Block> for Runtime {
fn configuration() -> sp_consensus_babe::BabeConfiguration {
fn configuration() -> sp_consensus_babe::BabeGenesisConfiguration {
// The choice of `c` parameter (where `1 - c` represents the
// probability of a slot being empty), is done in accordance to the
// slot duration and expected target block time, for safely
// resisting network delays of maximum two seconds.
// <https://research.web3.foundation/en/latest/polkadot/BABE/Babe/#6-practical-results>
sp_consensus_babe::BabeConfiguration {
sp_consensus_babe::BabeGenesisConfiguration {
slot_duration: Babe::slot_duration(),
epoch_length: EpochDuration::get(),
c: PRIMARY_PROBABILITY,