getCredentialNfts function

Future<List<CrossmintCredentialsCollection>> getCredentialNfts(CrossmintVcChain chain, String wallet, { required CrossmintWalletCredentialNftProvider walletNftsProvider, required CrossmintCredentialCollectionProvider collectionProvider, CrossmintCredentialFilter filter = const CrossmintCredentialFilter(), })

Implementation

Future<List<CrossmintCredentialsCollection>> getCredentialNfts(
  CrossmintVcChain chain,
  String wallet, {
  required CrossmintWalletCredentialNftProvider walletNftsProvider,
  required CrossmintCredentialCollectionProvider collectionProvider,
  CrossmintCredentialFilter filter = const CrossmintCredentialFilter(),
}) async {
  final List<CrossmintVcNft> nfts = await walletNftsProvider(chain, wallet);
  final Map<String, List<CrossmintVcNft>> grouped =
      <String, List<CrossmintVcNft>>{};
  for (final CrossmintVcNft nft in nfts) {
    grouped.putIfAbsent(nft.contractAddress, () => <CrossmintVcNft>[]).add(nft);
  }

  final List<CrossmintCredentialsCollection> collections =
      <CrossmintCredentialsCollection>[];
  for (final MapEntry<String, List<CrossmintVcNft>> entry in grouped.entries) {
    final CrossmintCredentialsCollection? collection = await collectionProvider(
      chain,
      entry.key,
    );
    if (collection == null) {
      continue;
    }
    if (!_matchesCredentialFilter(collection, filter)) {
      continue;
    }
    collections.add(
      CrossmintCredentialsCollection(
        nfts: List<CrossmintVcNft>.unmodifiable(entry.value),
        contractAddress: collection.contractAddress,
        chain: collection.chain,
        metadata: collection.metadata,
        raw: collection.raw,
      ),
    );
  }
  return collections;
}