Fix crash with non-consecutive Babe epoch numbers (#1695)

* Fix crash with non-consecutive Babe epoch numbers * PR link
smol-dot · Mar 4, 2024 · d5e6e20 · d5e6e20
1 parent 60fc60e
commit d5e6e20
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diff --git a/lib/src/chain/chain_information.rs b/lib/src/chain/chain_information.rs
@@ -407,11 +407,6 @@ impl<'a> ChainInformationRef<'a> {
                 } else {
                     return Err(ValidityError::MissingBabeSlotStartNumber);
                 }
-                if finalized_block_epoch_information.epoch_index + 1
-                    != finalized_next_epoch_transition.epoch_index
-                {
-                    return Err(ValidityError::NonLinearBabeEpochs);
-                }
             }
 
             if finalized_block_epoch_information.is_none()
@@ -617,8 +612,6 @@ pub enum ValidityError {
     /// Finalized block is block number 0, and a Babe epoch information has been provided. This
     /// would imply the existence of a block -1 and below.
     UnexpectedBabeFinalizedEpoch,
-    /// Next Babe epoch number does not immediately follow current Babe epoch number.
-    NonLinearBabeEpochs,
     /// Finalized block is not number 0, but no Babe epoch information has been provided.
     NoBabeFinalizedEpoch,
     /// The slot of the finalized block is inferior to the start slot of the epoch it belongs to.

diff --git a/wasm-node/CHANGELOG.md b/wasm-node/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Fixed
+
+- Fix crash when extracting the database of a chain when the current Babe epoch number doesn't immediately follow the previous Babe epoch number. ([#1695](https://github.com/smol-dot/smoldot/pull/1695))
+
 ## 2.0.21 - 2024-02-06
 
 ### Changed