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Make relay state readable (patch on top of 0.9.18 dep update branch) #23

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Make relay state readable (patch on top of 0.9.18 dep update branch) #23

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18 changes: 18 additions & 0 deletions pallets/parachain-system/src/relay_state_snapshot.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,10 @@ pub struct MessagingStateSnapshot {
pub enum Error {
/// The provided proof was created against unexpected storage root.
RootMismatch,
/// The entry cannot be read.
ReadEntry(ReadEntryErr),
/// The optional entry cannot be read.
ReadOptionalEntry(ReadEntryErr),
/// The slot cannot be extracted.
Slot(ReadEntryErr),
/// The upgrade go-ahead signal cannot be read.
Expand Down Expand Up @@ -273,4 +277,18 @@ impl RelayChainStateProof {
)
.map_err(Error::UpgradeRestriction)
}

pub fn read_entry<T>(&self, key: &[u8], fallback: Option<T>) -> Result<T, Error>
where
T: Decode,
{
read_entry(&self.trie_backend, key, fallback).map_err(Error::ReadEntry)
}

pub fn read_optional_entry<T>(&self, key: &[u8]) -> Result<Option<T>, Error>
where
T: Decode,
{
read_optional_entry(&self.trie_backend, key).map_err(Error::ReadOptionalEntry)
}
}