# extendExpiration

Extend unsigned transaction expiration time in seconds.

## Usage

``` javascript
tronWeb.transactionBuilder.extendExpiration(transaction, extension);
```

## Parameters
| Argument | Description | Type |
|---------------|--------|------|
|transaction|The transaction object | JSON |
|extension | Extension of the expiration time in seconds | Integer |

## Returns

Object

## Note

The Transaction hash(Transaction ID) will be changed after
"extendExpiration" was executed as a new transaction object is
generated. Please use the newly generated Transactions for subsequent
processes like sign or broadcast. thanks.

## Example

``` javascript
> const transaction = await tronWeb.transactionBuilder.sendTrx("TNo9e8MWQpGVqdyySxLSTw3gjgFQWE3vfg", 100,"TM2TmqauSEiRf16CyFgzHV2BVxBejY9iyR");  
> const extendExpirationObj =  await tronWeb.transactionBuilder.extendExpiration(transaction, 500);
> const signedtxn = await tronWeb.trx.sign(extendExpirationObj, privateKey);
console.log(extendExpirationObj);
> {txID: "a33e940480202c8d38c65a571a699be4e082e40776bab0000103c8cca63f6cb4", raw_data: {}, raw_data_hex: "0a02c9bc2208a506a5de6e7a02c040d0c48fd3822e5a650801…d4fa7b33c9645a2276dc9b192902e2d186470e7b1edd2822e", visible: false}
txID: "a33e940480202c8d38c65a571a699be4e082e40776bab0000103c8cca63f6cb4"
raw_data: {contract: Array(1), ref_block_bytes: "c9bc", ref_block_hash: "a506a5de6e7a02c0", expiration: 1581259154000, timestamp: 1581258594535}
raw_data_hex: "0a02c9bc2208a506a5de6e7a02c040d0c48fd3822e5a65080112610a2d747970652e676f6f676c65617069732e636f6d2f70726f746f636f6c2e5472616e73666572436f6e747261637412300a15417946f66d0fc67924da0ac9936183ab3b07c811261215418cb2ab880d4fa7b33c9645a2276dc9b192902e2d186470e7b1edd2822e"
visible: false
__proto__: Object
```