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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | 43x 43x 43x 2x 2x 2x 2x 2x 2x | import { Logger } from 'ts-log';
import { NetworkInfoProvider } from '@cardano-sdk/core';
import { Observable } from 'rxjs';
import { PersistentDocumentTrackerSubject, pollProvider } from './util';
import { RetryBackoffConfig } from 'backoff-rxjs';
import { SupplyDistributionStores } from '../persistence';
import isEqual from 'lodash/isEqual.js';
export type SupplyDistributionNetworkInfoProvider = Pick<NetworkInfoProvider, 'stake' | 'lovelaceSupply'>;
export interface SupplyDistributionTrackerProps {
/** SupplyDistribution re-fetch trigger. */
trigger$: Observable<unknown>;
/** Failed request retry strategy */
retryBackoffConfig?: RetryBackoffConfig;
}
export interface SupplyDistributionTrackerDependencies {
logger: Logger;
stores: SupplyDistributionStores;
/** Compatible with NetworkInfoProvider. */
networkInfoProvider: SupplyDistributionNetworkInfoProvider;
}
/**
* @returns object that continuously fetches and emits network stats (StakeSummary and SupplySummary)
*/
export const createSupplyDistributionTracker = (
{ trigger$, retryBackoffConfig = { initialInterval: 1000, maxInterval: 60_000 } }: SupplyDistributionTrackerProps,
{ logger, stores, networkInfoProvider }: SupplyDistributionTrackerDependencies
) => {
const stake$ = new PersistentDocumentTrackerSubject(
pollProvider({
equals: isEqual,
logger,
retryBackoffConfig,
sample: networkInfoProvider.stake,
trigger$
}),
stores.stake
);
const lovelaceSupply$ = new PersistentDocumentTrackerSubject(
pollProvider({
equals: isEqual,
logger,
retryBackoffConfig,
sample: networkInfoProvider.lovelaceSupply,
trigger$
}),
stores.lovelaceSupply
);
return {
lovelaceSupply$,
shutdown() {
logger.debug('Shutting down SupplyDistributionTracker');
stake$.complete();
lovelaceSupply$.complete();
},
stake$
};
};
export type SupplyDistributionTracker = ReturnType<typeof createSupplyDistributionTracker>;
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