fix: continue the tx validation loop if assetId length check fails (#18)

Currently, we check if the length of the assetId sent by the rollup is
of 32 bytes. If the check fails, we still continue executing the code
which will lead to a panic as in the subsequent we try to index the
bytes.

The fix would be to ignore this tx when the validation fails

grpc/execution/server.go

@@ -250,6 +250,7 @@ func (s *ExecutionServiceServerV1Alpha2) ExecuteBlock(ctx context.Context, req *
 
 			if len(deposit.AssetId) != 32 {
 				log.Debug("ignoring deposit tx with invalid asset ID", "assetID", deposit.AssetId)
+				continue
 			}
 			assetID := [32]byte{}
 			copy(assetID[:], deposit.AssetId[:32])