SetStorage
Interface
Persistent smart contract set storage. Only usable as a SmartContract property.
See the Properties and Storage chapter of the main guide for more information.
export interface SetStorage<V extends SerializableKey> extends Iterable<V> {
readonly [Symbol.iterator]: () => IterableIterator<V>;
readonly forEach: (callback: (value: V) => void) => void;
readonly has: (value: V) => boolean;
readonly delete: (value: V) => boolean;
readonly add: (value: V) => SetStorage<V>;
readonly at: V extends [SK, SK]
? SKSetAtTwo<V>
: V extends [SK, SK, SK]
? SKSetAtThree<V>
: V extends [SK, SK, SK, SK]
? SKSetAtFour<V>
: never;
readonly [OpaqueTagSymbol0]: unique symbol;
} Properties
at
V extends [SK, SK] ? SKSetAtTwo<V> : V extends [SK, SK, SK] ? SKSetAtThree<V> : V extends [SK, SK, SK, SK] ? SKSetAtFour<V> : never
Returns the elements from storage with the specified prefix.
Static Methods
for
for<K extends SerializableKey>(): SetStorage<K>; Methods
__@iterator
() => IterableIterator<V> forEach
Executes a provided function once per each value in storage.
(callback: (value: V) => void) => void has
Returns a boolean indicating whether an element with the specified value exists or not.
(value: V) => boolean delete
Removes the specified element from storage.
(value: V) => boolean add
Adds an element with the specified value in storage.
(value: V) => SetStorage<V> Example
class ICO extends SmartContract {
private readonly whitelistedAddresses =
SetStorage.for<Address>();
public isWhitelisted(address: Address): boolean {
return this.whitelistedAddresses.has(address);
}
} COPYRIGHT © 2021 NEO•ONE