Merge pull request #53 from dcSpark/egostkin/change-last-api

Change indexed log map's .last return type

indexed-log-map/src/storage.rs

@@ -158,14 +158,20 @@ impl<Key: Serialize + DeserializeOwned, Value: Serialize + DeserializeOwned>
  }))
  }
 
- pub fn last(&self) -> Result<Option<Result<Value>>> {
- Ok(self
+ pub fn last(&self) -> Result<Option<Value>> {
+ let last = self
  .storage
  .last()
- .map_err(|err| anyhow!("can't get last element of the storage: {:?}", err))?
- .map(|mmap| -> Result<Value> {
- ciborium::de::from_reader(mmap.as_slice()).context("can't deserialize cbor rep")
- }))
+ .map_err(|err| anyhow!("can't get last element of the storage: {:?}", err))?;
+ let value = match last {
+ None => None,
+ Some(mmap) => {
+ let value: Value = ciborium::de::from_reader(mmap.as_slice())
+ .context("can't deserialize cbor rep")?;
+ Some(value)
+ }
+ };
+ Ok(value)
  }
 }