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Decouples light-sync state from chain spec (#9491)

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* Decouples light-sync state from chain spec

This decouples the light-sync state from chain spec. First, the
light-sync state currently only works with BABE+Grandpa, so not
all *Substrate* based chains can use this feature. The next problem was
also that this pulled the `sc-consensus-babe` and `sc-finality-grandpa`
crate into `sc-chain-spec`.

If a chain now wants to support the light-sync state, it needs to add
the `LightSyncStateExtension` to the chain spec as an extension. This is
documented in the crate level docs of `sc-sync-state-rpc`. If this
extension is not available, `SyncStateRpc` fails at initialization.

* Fix compilation for browser

* Fmt
This commit is contained in:
Bastian Köcher
2021-08-04 15:38:14 +02:00
committed by GitHub
parent 2f4db88b41
commit 6e4d30e8ad
17 changed files with 211 additions and 149 deletions
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substrate/bin/node/cli/src/chain_spec.rs
+2
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@@ -57,6 +57,8 @@ pub struct Extensions {
pub fork_blocks: sc_client_api::ForkBlocks<Block>,
/// Known bad block hashes.
pub bad_blocks: sc_client_api::BadBlocks<Block>,
/// The light sync state extension used by the sync-state rpc.
pub light_sync_state: sc_sync_state_rpc::LightSyncStateExtension,
}
/// Specialized `ChainSpec`.