# swivel.abstracts.deployed

### Classes

### Class `Deployed` <a href="#id" id="id"></a>

> ```
> class Deployed
> ```

Helper class that provides a standard way to create an ABC using inheritance.

**Descendants**

* swivel.abstracts.market\_place.MarketPlace
* swivel.abstracts.swivel.Swivel
* swivel.abstracts.vault\_tracker.VaultTracker

**Methods**

**Method `at`**

> ```
> def at(
>     self,
>     a,
>     opts=None
> )
> ```

Get a reference to the vendor specific contract instance deployed at a given address

### Parameters

a (string) the address of the deployed smart contract

opts (dict) optional tx options

**Method `tx_opts`**

> ```
> def tx_opts(
>     self,
>     o
> )
> ```

Sets default transaction options