# getTransactionHashes

### Input

| Argument        | Mandatory | Description                                    | Format |
| --------------- | --------- | ---------------------------------------------- | ------ |
| addresses       | no        | List of addresses to query transactions        | array  |
| blockHash       | no        | Block hash of the first block                  | string |
| firstBlockIndex | no        | Block index of the first block                 | uint32 |
| blockCount      | yes       | Number of blocks to query                      | uint32 |
| paymentId       | no        | Payment ID to filter the returned transactions | string |

### Output

| Argument | Description    | Format |
| -------- | -------------- | ------ |
| items    | List of blocks | array  |