Enum diem_scratchpad::AccountStatus

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pub enum AccountStatus<V> {
    ExistsInScratchPad(V),
    ExistsInDB,
    DoesNotExist,
    Unknown,
}
Expand description

AccountStatus describes the result of querying an account from this SparseMerkleTree.

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ExistsInScratchPad(V)

The account exists in the tree, therefore we can give its value.

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ExistsInDB

The account does not exist in the tree, but exists in DB. This happens when the search reaches a leaf node that has the requested account, but the node has only the value hash because it was loaded into memory as part of a non-inclusion proof. When we go to DB we don’t need to traverse the tree to find the same leaf, instead we can use the value hash to look up the account content directly.

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DoesNotExist

The account does not exist in either the tree or DB. This happens when the search reaches an empty node, or a leaf node that has a different account.

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Unknown

We do not know if this account exists or not and need to go to DB to find out. This happens when the search reaches a subtree node.

Trait Implementations§

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impl<V: Debug> Debug for AccountStatus<V>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<V: PartialEq> PartialEq<AccountStatus<V>> for AccountStatus<V>

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fn eq(&self, other: &AccountStatus<V>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<V: Eq> Eq for AccountStatus<V>

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impl<V> StructuralEq for AccountStatus<V>

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impl<V> StructuralPartialEq for AccountStatus<V>

Auto Trait Implementations§

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impl<V> RefUnwindSafe for AccountStatus<V>where V: RefUnwindSafe,

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impl<V> Send for AccountStatus<V>where V: Send,

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impl<V> Sync for AccountStatus<V>where V: Sync,

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impl<V> Unpin for AccountStatus<V>where V: Unpin,

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impl<V> UnwindSafe for AccountStatus<V>where V: UnwindSafe,

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impl<T> Any for Twhere T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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