@lodestar/beacon-node/lib/chain/stateCache/datastore/db.js

A Typescript implementation of the beacon chain

import { ssz } from "@lodestar/types";
/**
 * Implementation of CPStateDatastore using db.
 */
export class DbCPStateDatastore {
    constructor(db) {
        this.db = db;
    }
    async write(cpKey, stateBytes) {
        const serializedCheckpoint = checkpointToDatastoreKey(cpKey);
        await this.db.checkpointState.putBinary(serializedCheckpoint, stateBytes);
        return serializedCheckpoint;
    }
    async remove(serializedCheckpoint) {
        await this.db.checkpointState.delete(serializedCheckpoint);
    }
    async read(serializedCheckpoint) {
        return this.db.checkpointState.getBinary(serializedCheckpoint);
    }
    async readKeys() {
        return this.db.checkpointState.keys();
    }
}
export function datastoreKeyToCheckpoint(key) {
    return ssz.phase0.Checkpoint.deserialize(key);
}
export function checkpointToDatastoreKey(cp) {
    return ssz.phase0.Checkpoint.serialize(cp);
}
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