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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | 42x 42x 42x 42x 42x 42x 42x 42x 42x 1x 42x 6x 42x 42x 44x 2x 2x 2x 1x 1x 1x 42x 42x 51x 51x 51x 10x 6x 15x 1x 6x 5x 42x 47x 9x 47x 37x 37x 28x 9x 9x 9x 8x 8x 9x 8x 8x 2x 2x 6x 9x 2x 7x 6x 1x 1x 5x 1x | import { Asset, Cardano, Handle, HandleProvider } from '@cardano-sdk/core';
import { Assets, HandleInfo } from '../types';
import {
EMPTY,
Observable,
catchError,
combineLatest,
concatMap,
defer,
distinctUntilChanged,
from,
mergeMap,
of,
shareReplay,
startWith,
tap,
toArray
} from 'rxjs';
import { Logger } from 'ts-log';
import { deepEquals, isNotNil, sameArrayItems } from '@cardano-sdk/util';
import { passthrough } from '@cardano-sdk/util-rxjs';
import { retryBackoff } from 'backoff-rxjs';
import uniqBy from 'lodash/uniqBy.js';
export const HYDRATE_HANDLE_INITIAL_INTERVAL = 50;
export const HYDRATE_HANDLE_MAX_RETRIES = 5;
export interface HandlesTrackerProps {
utxo$: Observable<Cardano.Utxo[]>;
assetInfo$: Observable<Assets>;
handlePolicyIds$: Observable<Cardano.PolicyId[]>;
logger: Logger;
handleProvider: HandleProvider;
}
interface HandlesTrackerInternals {
hydrateHandle?: (
handleProvider: HandleProvider,
logger: Logger
) => (handles: HandleInfo) => Promise<HandleInfo> | Observable<HandleInfo>;
}
const handleInfoEquals = (a: HandleInfo, b: HandleInfo) =>
a.assetId === b.assetId &&
a.resolvedAt?.hash === b.resolvedAt?.hash &&
deepEquals(a.tokenMetadata, b.tokenMetadata) &&
deepEquals(a.nftMetadata, b.nftMetadata);
const isHydrated = (handleInfo: HandleInfo) =>
'image' in handleInfo && 'backgroundImage' in handleInfo && 'profilePic' in handleInfo;
export const hydrateHandleAsync =
(handleProvider: HandleProvider, logger: Logger) =>
async (handle: HandleInfo): Promise<HandleInfo> => {
logger.debug('hydrating handle', handle.handle);
try {
const [resolution] = await handleProvider.resolveHandles({ handles: [handle.handle] });
return {
...handle,
backgroundImage: resolution?.backgroundImage,
image: resolution?.image,
profilePic: resolution?.profilePic,
resolvedAt: resolution?.resolvedAt
};
} catch (error) {
logger.error("Couldn't hydrate handle", error);
throw error;
}
};
export const hydrateHandles =
(hydrateHandle: (handle: HandleInfo) => Promise<HandleInfo> | Observable<HandleInfo>) =>
(evt$: Observable<HandleInfo[]>): Observable<HandleInfo[]> => {
const hydratedHandles: Partial<Record<Handle, HandleInfo>> = {};
return evt$.pipe(
mergeMap((handles) =>
from(handles).pipe(
concatMap((handleInfo) =>
handleInfo.handle in hydratedHandles
? of(hydratedHandles[handleInfo.handle]!)
: defer(() => from(hydrateHandle(handleInfo))).pipe(
retryBackoff({
initialInterval: HYDRATE_HANDLE_INITIAL_INTERVAL,
maxRetries: HYDRATE_HANDLE_MAX_RETRIES,
resetOnSuccess: true
}),
catchError(() => of(handleInfo))
)
),
tap((handleInfo) => {
if (isHydrated(handleInfo)) {
hydratedHandles[handleInfo.handle] = handleInfo;
}
}),
toArray(),
handles.length > 0 ? startWith(handles) : passthrough()
)
)
);
};
export const createHandlesTracker = (
{ assetInfo$, handlePolicyIds$, handleProvider, logger, utxo$ }: HandlesTrackerProps,
{ hydrateHandle = hydrateHandleAsync }: HandlesTrackerInternals = {}
) =>
combineLatest([handlePolicyIds$, utxo$, assetInfo$]).pipe(
mergeMap(([handlePolicyIds, utxo, assets]) => {
const filteredUtxo = utxo.flatMap(([_, txOut]) =>
uniqBy(
[...(txOut.value.assets?.keys() || [])]
.filter((assetId) => {
const matchPolicyId = handlePolicyIds.some((policyId) => assetId.startsWith(policyId));
if (!matchPolicyId) {
return false;
}
const assetName = Cardano.AssetId.getAssetName(assetId);
const decoded = Asset.AssetNameLabel.decode(assetName);
return !decoded || decoded.label === Asset.AssetNameLabelNum.UserNFT;
})
.map((assetId) => ({
handleAssetId: assetId,
txOut
})),
({ handleAssetId }) => handleAssetId
)
);
const handlesWithAssetInfo = filteredUtxo
.map(({ handleAssetId, txOut }): HandleInfo | null => {
const assetInfo = assets.get(handleAssetId);
if (!assetInfo) {
logger.debug(`Asset info not (yet?) found for ${handleAssetId}`);
return null;
}
return {
...assetInfo,
cardanoAddress: txOut.address,
handle: Asset.util.getAssetNameAsText(handleAssetId),
hasDatum: !!txOut.datum
};
})
.filter(isNotNil);
if (filteredUtxo.length > 0 && handlesWithAssetInfo.length === 0) {
// AssetInfo is still resolving
return EMPTY;
}
return of(
handlesWithAssetInfo.filter(({ handle, supply }) => {
if (supply > 1n) {
logger.warn(`Omitting handle with supply >1: ${handle}`);
return false;
}
return true;
})
);
}),
distinctUntilChanged((a, b) => sameArrayItems(a, b, handleInfoEquals)),
hydrateHandles(hydrateHandle(handleProvider, logger)),
shareReplay({ bufferSize: 1, refCount: true })
);
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