51 lines
1.4 KiB
TypeScript
51 lines
1.4 KiB
TypeScript
import { digest } from "@chainsafe/as-sha256";
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import { CommitteeSSZ, HashesSSZ } from "#ssz.js";
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import { IStore } from "#interfaces.js";
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import { concatBytes } from "@noble/hashes/utils";
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import { LightClientUpdate } from "#types.js";
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import * as capella from "@lodestar/types/capella";
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import NodeCache from "node-cache";
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import { fixSerializedUint8Array } from "#util.js";
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export interface StoreItem {
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update: Uint8Array;
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nextCommittee: Uint8Array;
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nextCommitteeHash: Uint8Array;
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}
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export default class Store implements IStore {
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private store = new NodeCache();
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constructor(expire: number = 0) {
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this.store.options.stdTTL = 0;
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}
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addUpdate(period: number, update: LightClientUpdate) {
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try {
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this.store.set(period, {
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update: fixSerializedUint8Array(
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capella.ssz.LightClientUpdate.serialize(update),
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),
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nextCommittee: fixSerializedUint8Array(
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CommitteeSSZ.serialize(update.nextSyncCommittee.pubkeys),
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),
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nextCommitteeHash: fixSerializedUint8Array(
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digest(concatBytes(...update.nextSyncCommittee.pubkeys)),
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),
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});
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} catch (e) {
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console.log(e);
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}
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}
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getUpdate(period: number): Uint8Array {
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if (this.store.has(period)) {
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return this.store.get<StoreItem>(period)?.update as Uint8Array;
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}
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throw new Error(`update unavailable for period ${period}`);
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}
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hasUpdate(period: number): boolean {
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return this.store.has(period);
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}
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}
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