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import { Cardano, RewardAccountInfoProvider } from '@cardano-sdk/core';
import { DelegationTracker, TransactionsTracker, UtxoTracker } from '../types';
import { GroupedAddress } from '@cardano-sdk/key-management';
import { Logger } from 'ts-log';
import {
Observable,
combineLatest,
concat,
defaultIfEmpty,
distinctUntilChanged,
filter,
map,
mergeMap,
of,
switchMap,
take,
tap
} from 'rxjs';
import {
ObservableRewardAccountInfoProvider,
createRewardAccountInfoProvider,
createRewardAccountsTracker
} from './RewardAccounts';
import { RetryBackoffConfig } from 'backoff-rxjs';
import { RewardsHistoryProvider, createRewardsHistoryProvider, createRewardsHistoryTracker } from './RewardsHistory';
import { Shutdown, contextLogger, deepEquals } from '@cardano-sdk/util';
import { TrackedRewardAccountInfoProvider, TrackedRewardsProvider } from '../ProviderTracker';
import { TrackerSubject } from '@cardano-sdk/util-rxjs';
import { WalletStores } from '../../persistence';
import { createDelegationDistributionTracker } from './DelegationDistributionTracker';
import { pollProvider } from '../util';
const createDelegationPortfolioProvider =
({
rewardAccountInfoProvider,
retryBackoffConfig,
logger
}: {
rewardAccountInfoProvider: RewardAccountInfoProvider;
retryBackoffConfig: RetryBackoffConfig;
logger: Logger;
}) =>
(rewardAccount: Cardano.RewardAccount): Observable<Cardano.Cip17DelegationPortfolio | null> =>
pollProvider({
logger,
retryBackoffConfig,
sample: () => rewardAccountInfoProvider.delegationPortfolio(rewardAccount)
});
type DelegationPortfolioProvider = ReturnType<typeof createDelegationPortfolioProvider>;
export interface DelegationTrackerProps {
rewardsTracker: TrackedRewardsProvider;
rewardAccountAddresses$: Observable<Cardano.RewardAccount[]>;
rewardAccountInfoProvider: TrackedRewardAccountInfoProvider;
epoch$: Observable<Cardano.EpochNo>;
transactionsTracker: Pick<TransactionsTracker, 'outgoing' | 'new$' | 'history$'>;
protocolParameters$: Observable<Pick<Cardano.ProtocolParameters, 'stakeKeyDeposit'>>;
retryBackoffConfig: RetryBackoffConfig;
utxoTracker: UtxoTracker;
refetchRewardAccountInfo$: Observable<void>;
knownAddresses$: Observable<GroupedAddress[]>;
stores: WalletStores;
internals?: {
rewardsHistoryProvider?: RewardsHistoryProvider;
observableRewardAccountInfoProvider?: ObservableRewardAccountInfoProvider;
delegationPortfolioProvider?: DelegationPortfolioProvider;
};
logger: Logger;
}
const hasDelegationCert = (certificates: Array<Cardano.Certificate> | undefined): boolean =>
!!certificates &&
certificates.some((cert) =>
Cardano.isCertType(cert, [...Cardano.RegAndDeregCertificateTypes, ...Cardano.StakeDelegationCertificateTypes])
);
/**
* @returns Observable that emits:
* - delegation portfolio if multi-delegation metadata is found in transactions
* - `null` if not multi-delegating
* - `undefined` if no relevant transactions were found
*/
const findDelegationPortfolioMetadata = () => (recentTransactions: Observable<Cardano.Tx[]>) =>
recentTransactions.pipe(
map((hydratedTxs) => {
const sortedTransactions = [...hydratedTxs].reverse();
let result;
for (const sorted of sortedTransactions) {
const portfolio = sorted.auxiliaryData?.blob?.get(Cardano.DelegationMetadataLabel);
const altersDelegationState = hasDelegationCert(sorted.body.certificates);
if (!portfolio && !altersDelegationState) continue;
if (altersDelegationState && !portfolio) {
result = null;
break;
}
if (portfolio) {
result = Cardano.cip17FromMetadatum(portfolio);
break;
}
}
return result;
})
);
const delegationTransactionFound = (
portfolio: Cardano.Cip17DelegationPortfolio | null | undefined
): portfolio is Cardano.Cip17DelegationPortfolio | null => typeof portfolio !== 'undefined';
export const createDelegationPortfolioTracker = (
rewardAccounts$: Observable<Cardano.RewardAccount[]>,
recentTransactionHistory$: Observable<Cardano.HydratedTx[]>,
newTransaction$: Observable<Cardano.OnChainTx>,
delegationPortfolioProvider: DelegationPortfolioProvider,
store: WalletStores['delegationPortfolio']
) => {
const storageSet = (portfolio: Cardano.Cip17DelegationPortfolio | null) =>
portfolio ? store.set(portfolio).subscribe() : store.delete().subscribe();
return combineLatest([store.get().pipe(defaultIfEmpty(null)), rewardAccounts$]).pipe(
switchMap(([storedPortfolio, rewardAccounts]) => {
if (rewardAccounts.length <= 1) {
Iif (storedPortfolio) {
storageSet(null);
}
return of(null);
}
const checkRecentHistory$ = recentTransactionHistory$.pipe(findDelegationPortfolioMetadata(), take(1));
const observeNewTransactions$ = newTransaction$.pipe(
map((newTx) => [newTx]),
findDelegationPortfolioMetadata(),
filter(delegationTransactionFound),
tap(storageSet)
);
if (storedPortfolio) {
return concat(
of(storedPortfolio),
// history is checked to recover from stale stored porfolio
checkRecentHistory$.pipe(filter(delegationTransactionFound)),
observeNewTransactions$
);
}
return concat(
checkRecentHistory$.pipe(
mergeMap((historyPorfolio) => {
if (delegationTransactionFound(historyPorfolio)) {
return of(historyPorfolio);
}
return recentTransactionHistory$.pipe(
take(1),
mergeMap((recentHistory) => {
Iif (recentHistory.length === 0) {
// no transactions => new wallet => not multi-delegating
return of(null);
}
return delegationPortfolioProvider(rewardAccounts[0]).pipe(take(1));
})
);
}),
tap(storageSet)
),
observeNewTransactions$
);
}),
distinctUntilChanged(deepEquals)
);
};
export const createDelegationTracker = ({
rewardAccountAddresses$,
epoch$,
rewardsTracker,
retryBackoffConfig,
transactionsTracker,
rewardAccountInfoProvider,
knownAddresses$,
refetchRewardAccountInfo$,
protocolParameters$,
utxoTracker,
stores,
logger,
internals: {
rewardsHistoryProvider = createRewardsHistoryProvider(rewardsTracker, retryBackoffConfig),
observableRewardAccountInfoProvider = createRewardAccountInfoProvider({
epoch$,
externalTrigger$: refetchRewardAccountInfo$,
logger,
retryBackoffConfig,
rewardAccountInfoProvider
}),
delegationPortfolioProvider = createDelegationPortfolioProvider({
logger,
retryBackoffConfig,
rewardAccountInfoProvider
})
} = {}
}: DelegationTrackerProps): DelegationTracker & Shutdown => {
const rewardsHistory$ = new TrackerSubject(
createRewardsHistoryTracker(
rewardAccountAddresses$,
epoch$,
rewardsHistoryProvider,
stores.rewardsHistory,
contextLogger(logger, 'rewardsHistory$')
)
);
const portfolio$ = new TrackerSubject(
createDelegationPortfolioTracker(
rewardAccountAddresses$,
transactionsTracker.history$,
transactionsTracker.new$,
delegationPortfolioProvider,
stores.delegationPortfolio
)
);
const rewardAccounts$ = new TrackerSubject(
createRewardAccountsTracker({
newTransaction$: transactionsTracker.new$,
protocolParameters$,
rewardAccountAddresses$,
rewardAccountInfoProvider: observableRewardAccountInfoProvider,
store: stores.rewardAccountInfo,
transactionsInFlight$: transactionsTracker.outgoing.inFlight$
})
);
const distribution$ = new TrackerSubject(
createDelegationDistributionTracker({ knownAddresses$, rewardAccounts$, utxoTracker })
);
return {
distribution$,
portfolio$,
rewardAccounts$,
rewardsHistory$,
shutdown: () => {
rewardAccounts$.complete();
rewardsHistory$.complete();
portfolio$.complete();
logger.debug('Shutdown');
}
};
};
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