> ## Documentation Index
> Fetch the complete documentation index at: https://docs.qu.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# OrphanFilter

```ts theme={null}
type OrphanFilter: {
  "hash": string;
  "number": number;
  "orphan": "drop-block";
 } | {
  "orphan": "drop-transaction";
  "other": {
     "blockHash": string;
     "blockNumber": number;
     "hash": string;
    };
  "tx": {
     "blockHash": string;
     "blockNumber": number;
     "hash": string;
    };
 } | {
  "orphan": "reorder-transaction";
  "other": {
     "blockHash": string;
     "blockNumber": number;
     "hash": string;
    };
  "tx": {
     "blockHash": string;
     "blockNumber": number;
     "hash": string;
    };
 } | {
  "log": {
     "address": string;
     "blockHash": string;
     "blockNumber": number;
     "data": string;
     "index": number;
     "topics": ReadonlyArray<string>;
     "transactionHash": string;
    };
  "orphan": "drop-log";
};
```

An Orphan Filter allows detecting when an orphan block has resulted in dropping a block or transaction or has
resulted in transactions changing order.

Not currently fully supported.

## Source

[providers/provider.ts:2525](https://github.com/dominant-strategies/quais.js/blob/c1c12d43f9d34c6baad2b0542bd6d0acd6fefcbf/src/providers/provider.ts#L2525)