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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 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | 42x 42x 42x 42x 42x 42x 42x 42x 482x 128x 42x 131x 131x 42x 42x 42x 125x 228x 228x 238x 128x 42x 490x 127x 42x 131x 131x 131x 131x 131x 125x 125x 125x 127x 127x 230x 230x 127x 18x 18x 18x 1x 127x 127x 245x 354x 245x 145x 141x 275x 141x | import { Asset, Cardano } from '@cardano-sdk/core';
import { Logger } from 'ts-log';
import {
Observable,
buffer,
concat,
connect,
debounceTime,
distinctUntilChanged,
filter,
map,
of,
share,
switchMap,
take,
tap
} from 'rxjs';
import { RetryBackoffConfig } from 'backoff-rxjs';
import { TrackedAssetProvider } from './ProviderTracker';
import { TransactionsTracker } from './types';
import { coldObservableProvider, concatAndCombineLatest } from '@cardano-sdk/util-rxjs';
import { deepEquals, isNotNil } from '@cardano-sdk/util';
import { newTransactions$ } from './TransactionsTracker';
import chunk from 'lodash/chunk.js';
import uniq from 'lodash/uniq.js';
const isAssetInfoComplete = (assetInfo: Asset.AssetInfo): boolean =>
assetInfo.nftMetadata !== undefined && assetInfo.tokenMetadata !== undefined;
const isEveryAssetInfoComplete = (assetInfos: Asset.AssetInfo[]): boolean => assetInfos.every(isAssetInfoComplete);
/** Buffers the source Observable values emitted at the same time (within 1 ms) */
const bufferTick =
<T>() =>
(source$: Observable<T>) =>
source$.pipe(connect((shared$) => shared$.pipe(buffer(shared$.pipe(debounceTime(1))))));
const ASSET_INFO_FETCH_CHUNK_SIZE = 100;
export const createAssetService =
(
assetProvider: TrackedAssetProvider,
retryBackoffConfig: RetryBackoffConfig,
onFatalError?: (value: unknown) => void
) =>
(assetIds: Cardano.AssetId[]) =>
concatAndCombineLatest(
chunk(assetIds, ASSET_INFO_FETCH_CHUNK_SIZE).map((assetIdsChunk) =>
coldObservableProvider({
onFatalError,
pollUntil: isEveryAssetInfoComplete,
provider: () =>
assetProvider.getAssets({
assetIds: assetIdsChunk,
extraData: { nftMetadata: true, tokenMetadata: true }
}),
retryBackoffConfig,
trigger$: of(true) // fetch only once
})
)
).pipe(map((arr) => arr.flat())); // concat the chunk results
export type AssetService = ReturnType<typeof createAssetService>;
export interface AssetsTrackerProps {
transactionsTracker: TransactionsTracker;
assetProvider: TrackedAssetProvider;
retryBackoffConfig: RetryBackoffConfig;
logger: Logger;
onFatalError?: (value: unknown) => void;
}
interface AssetsTrackerInternals {
assetService?: AssetService;
}
const uniqueAssetIds = ({ body: { outputs } }: Cardano.OnChainTx) =>
outputs.flatMap(({ value: { assets } }) => (assets ? [...assets.keys()] : []));
const flatUniqueAssetIds = (txes: Cardano.OnChainTx[]) => uniq(txes.flatMap(uniqueAssetIds));
export const createAssetsTracker = (
{ assetProvider, transactionsTracker: { history$ }, retryBackoffConfig, logger, onFatalError }: AssetsTrackerProps,
{ assetService = createAssetService(assetProvider, retryBackoffConfig, onFatalError) }: AssetsTrackerInternals = {}
) =>
new Observable<Map<Cardano.AssetId, Asset.AssetInfo>>((subscriber) => {
let fetchedAssetInfoMap = new Map<Cardano.AssetId, Asset.AssetInfo>();
const allAssetIds = new Set<Cardano.AssetId>();
const sharedHistory$ = history$.pipe(share());
return concat(
sharedHistory$.pipe(
map((historyTxs) => uniq(historyTxs.flatMap(uniqueAssetIds))),
tap((assetIds) =>
logger.debug(
assetIds.length > 0
? `Historical total assets: ${assetIds.length}`
: 'Setting assetProvider stats as initialized'
)
),
tap((assetIds) => assetIds.length === 0 && assetProvider.setStatInitialized(assetProvider.stats.getAsset$)),
take(1)
),
newTransactions$(sharedHistory$).pipe(
bufferTick(),
map(flatUniqueAssetIds),
map((assetIds) => {
const newAssetIds = assetIds.filter((assetId) => !allAssetIds.has(assetId));
// re-fetch all asset infos that either
// - weren't fetched yet
// - were fetched with incomplete metadata
const assetIdsToRefetch = [...allAssetIds.values()].filter((assetId) => {
const assetInfo = fetchedAssetInfoMap.get(assetId);
return !assetInfo || !isAssetInfoComplete(assetInfo);
});
// When we see a CIP-68 reference NFT, it means metadata for a user NFT that we own might have changed
const assetsWithCip68MetadataUpdates = assetIds
.map((assetId) => {
const assetName = Cardano.AssetId.getAssetName(assetId);
const decoded = Asset.AssetNameLabel.decode(assetName);
if (decoded?.label === Asset.AssetNameLabelNum.ReferenceNFT) {
return Cardano.AssetId.fromParts(
Cardano.AssetId.getPolicyId(assetId),
Asset.AssetNameLabel.encode(decoded.content, Asset.AssetNameLabelNum.UserNFT)
);
}
})
.filter(isNotNil);
return uniq([...newAssetIds, ...assetIdsToRefetch, ...assetsWithCip68MetadataUpdates]);
}),
filter((assetIds) => assetIds.length > 0)
)
)
.pipe(
tap((assetIds) => {
for (const assetId of assetIds) {
allAssetIds.add(assetId);
}
}),
// Restart inner observable if there are new assets to be fetched,
// otherwise the whole pipe will hang waiting for all assetInfos to resolve
switchMap((assetIdsToFetch) => (assetIdsToFetch.length > 0 ? assetService(assetIdsToFetch) : of([]))),
map((fetchedAssetInfos) => [...[...fetchedAssetInfoMap.values()].filter(isNotNil), ...fetchedAssetInfos]),
distinctUntilChanged(deepEquals), // It optimizes to not process duplicate emissions of the assets
tap((assetInfos) => logger.debug(`Got metadata for ${assetInfos.length} assets`)),
map((assetInfos) => new Map(assetInfos.map((assetInfo) => [assetInfo.assetId, assetInfo]))),
tap((v) => (fetchedAssetInfoMap = v))
)
.subscribe(subscriber);
});
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