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

# ABI manager

> matic.js internally uses ABIManager for handling ABI management, configuration for you. All of the ABI and config are taken from static repo.

`matic.js` internally uses `ABIManager` for handling ABI management, configuration for you. All of the ABI and config are taken from [static repo](https://github.com/0xPolygon/static).

## Change ABI

Sometimes you are required to change the ABI, particularly when you are developing a contract. You can do so by using `ABIManager`.

**Syntax**

```js theme={null}
import { ABIManager } from '@maticnetwork/maticjs'


const manager = new ABIManager(<network name>,<version>);
await manager.init();

// set abi

manager.setABI(<contract name>,<bridge type>, <abi value>);

// get abi

manager.getABI(<contract name>,<bridge type>);
```

The network name, contract name, bridge name etc can be taken from our [official static repo](https://github.com/0xPolygon/static/tree/master/network).

**Example**

```js theme={null}
import { ABIManager } from '@maticnetwork/maticjs'


const manager = new ABIManager('testnet','amoy');
await manager.init();

// set abi

manager.setABI('ERC20PredicateProxy','pos', 'abi value');

// get abi

manager.getABI('ERC20PredicateProxy','pos');
```