---
sidebar_position: 1
title: contract
---

**Smart Contract Deployment**

For deploying a smart contract, you can not only use the
[tronWeb.transactionBuilder.createSmartContract](../transactionBuilder/createSmartContract) interface, but also the [tronWeb.contract().new()](./tronweb.contract().new) interface.

**Smart Contract Invocation**

Get smart contract instance

Before calling a smart contract, you need to obtain the smart contract
instance first. You can create a contract instance in the following two
ways:

``` javascript
//Example 1
let abi = [...];       
let instance = await tronWeb.contract(abi,'contractAddress'); 

//Example 2
let abi = [...];
let instance = await tronWeb.contract(abi, 'contractAddress');
```

Calling smart contract methods

Different types of contract methods need to be invoked by different
tronweb apis:

* Use `call` to execute `pure` or `view` smart contract methods, please
refer to [method.call()](./method.call).
* Use `send` to
execute `non-pure` or `modify` smart contract methods, please refer to
[method.send()](./method.send) for specific usage
instructions.