@@ -1220,13 +1220,19 @@ public static async Task<BigInteger> ERC1155_TotalSupply(this ThirdwebContract c
12201220 /// <param name="fillOwner">A boolean indicating whether to fill the owner details. Defaults to true.</param>
12211221 /// <returns>A task representing the asynchronous operation, with an NFT result containing the token details.</returns>
12221222 /// <exception cref="ArgumentNullException">Thrown when the contract is null.</exception>
1223+ /// <exception cref="ArgumentOutOfRangeException">Thrown when the token ID is less than 0.</exception>
12231224 public static async Task < NFT > ERC721_GetNFT ( this ThirdwebContract contract , BigInteger tokenId , bool fillOwner = true )
12241225 {
12251226 if ( contract == null )
12261227 {
12271228 throw new ArgumentNullException ( nameof ( contract ) ) ;
12281229 }
12291230
1231+ if ( tokenId < 0 )
1232+ {
1233+ throw new ArgumentOutOfRangeException ( nameof ( tokenId ) , "Token ID must be equal or greater than 0" ) ;
1234+ }
1235+
12301236 var nft = new NFT
12311237 {
12321238 Owner = Constants . ADDRESS_ZERO ,
@@ -1379,13 +1385,19 @@ public static async Task<List<NFT>> ERC721_GetOwnedNFTs(this ThirdwebContract co
13791385 /// <param name="fillSupply">A boolean indicating whether to fill the supply. Defaults to true if not specified.</param>
13801386 /// <returns>A task representing the asynchronous operation, with an NFT result containing the token details.</returns>
13811387 /// <exception cref="ArgumentNullException">Thrown when the contract is null.</exception>
1388+ /// <exception cref="ArgumentOutOfRangeException">Thrown when the token ID is less than 0.</exception>
13821389 public static async Task < NFT > ERC1155_GetNFT ( this ThirdwebContract contract , BigInteger tokenId , bool fillSupply = true )
13831390 {
13841391 if ( contract == null )
13851392 {
13861393 throw new ArgumentNullException ( nameof ( contract ) ) ;
13871394 }
13881395
1396+ if ( tokenId < 0 )
1397+ {
1398+ throw new ArgumentOutOfRangeException ( nameof ( tokenId ) , "Token ID must be equal or greater than 0" ) ;
1399+ }
1400+
13891401 var uri = await contract . ERC1155_URI ( tokenId ) . ConfigureAwait ( false ) ;
13901402 NFTMetadata metadata ;
13911403 try
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