@fedify/fedify/esm/federation/keycache.js

An ActivityPub server framework

import { CryptographicKey, Multikey } from "../vocab/vocab.js";
export class KvKeyCache {
    kv;
    prefix;
    options;
    nullKeys;
    constructor(kv, prefix, options = {}) {
        this.kv = kv;
        this.prefix = prefix;
        this.nullKeys = new Set();
        this.options = options;
    }
    async get(keyId) {
        if (this.nullKeys.has(keyId.href))
            return null;
        const serialized = await this.kv.get([...this.prefix, keyId.href]);
        if (serialized == null)
            return undefined;
        try {
            return await CryptographicKey.fromJsonLd(serialized, this.options);
        }
        catch {
            try {
                return await Multikey.fromJsonLd(serialized, this.options);
            }
            catch {
                await this.kv.delete([...this.prefix, keyId.href]);
                return undefined;
            }
        }
    }
    async set(keyId, key) {
        if (key == null) {
            this.nullKeys.add(keyId.href);
            await this.kv.delete([...this.prefix, keyId.href]);
            return;
        }
        this.nullKeys.delete(keyId.href);
        const serialized = await key.toJsonLd(this.options);
        await this.kv.set([...this.prefix, keyId.href], serialized);
    }
}