---
title: setDefaultBlock
---
# setDefaultBlock <TitleWithCodeLink2 link="setDefaultBlock" />

Sets the default block used as a reference for tronWeb.trx.getBlock, tronWeb.trx.getBlockTransactionCount, tronWeb.trx.getTransactionFromBlock

## Usage

```JavaScript
TronWeb.setDefaultBlock(blockID);
```

## Parameter

| Parameter | Description                                                                                                                                                       | Data Type       |
| --------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------- |
| blockID   | Possible input values can be `latest`, `earliest`, left blank or block number. <br/> `latest`:	The reference block is the latest block <br/> `earliest`: The reference block is the genesis block <br/> left blank:	No reference block <br/> block number:	The reference block is the corresponding block | Number / String |

## Returns

String or false or Number - The same as the input parameter.

## Example

```JavaScript
tronWeb.setDefaultBlock('latest');
// output-start
'latest'
// output-end

tronWeb.setDefaultBlock();
// output-start
false
// output-end

tronWeb.setDefaultBlock('earliest');
// output-start
'earliest'
// output-end

tronWeb.setDefaultBlock(585367);
// output-start
585367
// output-end
```