@ceramicnetwork/core/lib/initialization/stream-loading.js

Typescript implementation of the Ceramic protocol

import { StreamUpdater } from '../stream-loading/stream-updater.js';
import { StreamLoader } from '../stream-loading/stream-loader.js';
import { AnchorTimestampExtractor } from '../stream-loading/anchor-timestamp-extractor.js';
import { TipFetcher } from '../stream-loading/tip-fetcher.js';
import { LogSyncer } from '../stream-loading/log-syncer.js';
import { StateManipulator } from '../stream-loading/state-manipulator.js';
import { empty } from 'rxjs';
const noopPubsubQuerier = {
    queryNetwork(streamId) {
        return empty();
    },
};
export function makeStreamLoaderAndUpdater(logger, dispatcher, anchorValidator, api, streamHandlers) {
    const anchorTimestampExtractor = new AnchorTimestampExtractor(logger, dispatcher, anchorValidator);
    if (!dispatcher.messageBus) {
        logger.warn("No pubsub querier detected, won't be able to load tips from the network");
    }
    const tipFetcher = new TipFetcher(dispatcher.messageBus ? dispatcher.messageBus : noopPubsubQuerier);
    const logSyncer = new LogSyncer(dispatcher);
    const stateManipulator = new StateManipulator(logger, streamHandlers, logSyncer, api);
    const streamLoader = new StreamLoader(logger, tipFetcher, logSyncer, anchorTimestampExtractor, stateManipulator);
    const streamUpdater = new StreamUpdater(logger, dispatcher, logSyncer, anchorTimestampExtractor, stateManipulator);
    return [streamLoader, streamUpdater];
}
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