scratchpad

Enum 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 for AccountStatus<V>

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

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

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> StructuralPartialEq for AccountStatus<V>

Auto Trait Implementations§

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

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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,

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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where R: 'a,

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where R: 'a,

Mutably borrows self and passes that borrow into the pipe function. Read more
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where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

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where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

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where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

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where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

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where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

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const ALIGN: usize

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type Init = T

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type Output = T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

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where Self: Borrow<B>, B: ?Sized,

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where Self: Deref<Target = T>, T: ?Sized,

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where Self: DerefMut<Target = T> + Deref, T: ?Sized,

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