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Asset,
AssetProvider,
Cardano,
CardanoNodeUtil,
GetAssetArgs,
GetAssetsArgs,
ProviderError,
ProviderFailure,
Seconds
} from '@cardano-sdk/core';
import { AssetBuilder } from './AssetBuilder';
import { AssetPolicyIdAndName, NftMetadataService, TokenMetadataService } from '../types';
import { DB_CACHE_TTL_DEFAULT, InMemoryCache, NoCache } from '../../InMemoryCache';
import { DbSyncProvider, DbSyncProviderDependencies } from '../../util';
/** Properties that are need to create DbSyncAssetProvider */
export interface DbSyncAssetProviderProps {
/** Pagination page size limit used for provider methods constraint. */
paginationPageSizeLimit: number;
/** Cache TTL in seconds, defaults to 2 hours */
cacheTTL?: Seconds;
/** Does not use in-memory cache if `true` */
disableDbCache?: boolean;
}
/** Dependencies that are need to create DbSyncAssetProvider */
export interface DbSyncAssetProviderDependencies extends DbSyncProviderDependencies {
/** The NftMetadataService to retrieve Asset.NftMetadata. */
ntfMetadataService: NftMetadataService;
/** The TokenMetadataService to retrieve Asset.TokenMetadata. */
tokenMetadataService: TokenMetadataService;
}
const nftMetadataCacheKey = (assetId: Cardano.AssetId) => `nm_${assetId.toString()}`;
const assetInfoCacheKey = (assetId: Cardano.AssetId) => `ai_${assetId.toString()}`;
/**
* AssetProvider implementation using {@link NftMetadataService}, {@link TokenMetadataService}
* and `cardano-db-sync` database as sources
*/
export class DbSyncAssetProvider extends DbSyncProvider() implements AssetProvider {
#builder: AssetBuilder;
#dependencies: DbSyncAssetProviderDependencies;
#paginationPageSizeLimit: number;
#cache: InMemoryCache;
constructor(
{ paginationPageSizeLimit, disableDbCache, cacheTTL = DB_CACHE_TTL_DEFAULT }: DbSyncAssetProviderProps,
dependencies: DbSyncAssetProviderDependencies
) {
const { cache, dbPools, cardanoNode, logger } = dependencies;
super({ cache, cardanoNode, dbPools, logger });
this.#builder = new AssetBuilder(dbPools.main, logger);
this.#dependencies = dependencies;
this.#paginationPageSizeLimit = paginationPageSizeLimit;
this.#cache = disableDbCache ? new NoCache() : new InMemoryCache(cacheTTL);
}
async getAsset({ assetId, extraData }: GetAssetArgs) {
const assetInfo = await this.#getAssetInfo(assetId);
if (extraData?.nftMetadata) assetInfo.nftMetadata = await this.#getNftMetadata(assetInfo);
if (extraData?.tokenMetadata) {
try {
assetInfo.tokenMetadata = (await this.#dependencies.tokenMetadataService.getTokenMetadata([assetId]))[0];
} catch (error) {
if (CardanoNodeUtil.isProviderError(error) && error.reason === ProviderFailure.Unhealthy) {
this.logger.error(`Failed to fetch token metadata for asset with ${assetId} due to: ${error.message}`);
assetInfo.tokenMetadata = undefined;
} else E{
throw error;
}
}
}
return assetInfo;
}
async getAssets({ assetIds, extraData }: GetAssetsArgs) {
if (assetIds.length > this.#paginationPageSizeLimit) {
throw new ProviderError(
ProviderFailure.BadRequest,
undefined,
`AssetIds count of ${assetIds.length} can not be greater than ${this.#paginationPageSizeLimit}`
);
}
const fetchTokenMetadataList = async () => {
let tokenMetadataList: (Asset.TokenMetadata | null | undefined)[] = [];
try {
tokenMetadataList = await this.#dependencies.tokenMetadataService.getTokenMetadata(assetIds);
} catch (error) {
if (CardanoNodeUtil.isProviderError(error) && error.reason === ProviderFailure.Unhealthy) {
this.logger.error(`Failed to fetch token metadata for assets ${assetIds} due to: ${error.message}`);
tokenMetadataList = Array.from({ length: assetIds.length });
} else {
throw error;
}
}
return tokenMetadataList;
};
const tokenMetadataListPromise = extraData?.tokenMetadata ? fetchTokenMetadataList() : undefined;
const getAssetInfo = async (assetId: Cardano.AssetId) => {
const assetInfo = await this.#getAssetInfo(assetId);
if (extraData?.nftMetadata) assetInfo.nftMetadata = await this.#getNftMetadata(assetInfo);
if (tokenMetadataListPromise)
assetInfo.tokenMetadata = (await tokenMetadataListPromise)[assetIds.indexOf(assetId)];
return assetInfo;
};
return Promise.all(assetIds.map((_) => getAssetInfo(_)));
}
async #getNftMetadata(asset: AssetPolicyIdAndName): Promise<Asset.NftMetadata | null> {
return this.#cache.get(
nftMetadataCacheKey(Cardano.AssetId.fromParts(asset.policyId, asset.name)),
async () => await this.#dependencies.ntfMetadataService.getNftMetadata(asset)
);
}
async #getAssetInfo(assetId: Cardano.AssetId): Promise<Asset.AssetInfo> {
return this.#cache.get(assetInfoCacheKey(assetId), async () => {
const name = Cardano.AssetId.getAssetName(assetId);
const policyId = Cardano.AssetId.getPolicyId(assetId);
const multiAsset = await this.#builder.queryMultiAsset(policyId, name);
if (!multiAsset)
throw new ProviderError(
ProviderFailure.NotFound,
undefined,
`No entries found in multi_asset table for asset '${assetId}'`
);
const fingerprint = multiAsset.fingerprint as unknown as Cardano.AssetFingerprint;
const supply = BigInt(multiAsset.sum);
// Backwards compatibility
const quantity = supply;
return { assetId, fingerprint, name, policyId, quantity, supply };
});
}
}
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