# Fetch election calls with web3

### 🚀  Want a shortcut? 🚀 

[**Start with our boilerplate "Mission Control" App on GitHub**](https://github.com/EveripediaNetwork/everipedia-ap-2020). This shows how to connect to both mainnet and Kovan testnet using web3. 

### Walkthrough 

1. Begin by installing web3

```
npm install web3
```

2\. Instantiate a web3 provider

```
const Web3 = require("web3");
export const web3 = new Web3(
  new Web3.providers.HttpProvider(
    "YOUR_INFURA_URL_OR_SIMILAR_PROVIDER"
  )
);
```

3\. Connect to the contract (the "abi" variable below is a JavaScript array. Find [the mainnet abi here](https://github.com/EveripediaNetwork/everipedia-ap-2020/blob/master/src/mainnet/election-contract.js) and the [kovan abi here](https://github.com/EveripediaNetwork/everipedia-ap-2020/blob/master/src/kovan/election-contract.js))

// Mainnet

```
export const mainnetAddress = "0x0792724900B551d200D954a5Ed709d9514d73A9F";
export const mainnetContract = new web3.eth.Contract(abi, mainnetAddress);
```

// Kovan

```
export const kovanAddress = "0x12B7B8Dea45AF31b6303E00C735332A8b6752856";
export const kovanContract = new web3.eth.Contract(abi, kovanAddress);
```

4\. Fetch the election results!

// Mainnet

```
const allWinners = await mainnetContract.methods
      .presidentialWinners(state)
      .call()
```

// Kovan

```
const allWinners = await kovanContract.methods
      .presidentialWinners(state)
      .call()
```

5\. Make use of your verified election data!

```
/** 
This is the shape of the data
{
  [state]: {
    winner: "Biden" | "Trump" | ...,
    resultNow: "1604003431", // string unix time that winner was called
    resultBlock: "11153856", // string etherum block where call was mined in
  }
}

you can find an array of all states (52 = 50 states + D.C. + US) here:
https://github.com/EveripediaNetwork/everipedia-ap-2020/blob/master/src/all-states.js
*/
```

You may find this screenshot from Remix easier to understand. This is example data returned for the state "TEST" in production.

![Function screenshot from remix.ethereum.org](https://4237340628-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MKpcvqHmxdH4lqjGSp7%2F-MKvEgvc-Ohztn0tL51x%2F-MKvTIUP35LLH3eZgd4h%2Fimage.png?alt=media\&token=942a2603-9d68-40d9-8a3c-5029aed11840)

6\. Still having issues? 

1. [Refer to our example repo](https://github.com/EveripediaNetwork/everipedia-ap-2020)
2. Learn more about Chainlink Oracles at <https://docs.chain.link/docs>
3. Tweet to [@dawsonbotsford](https://twitter.com/dawsonbotsford) and [@everipedia](https://twitter.com/Everipedia) any engineering questions (or send a DM on Twitter to [@dawsonbotsford](https://twitter.com/dawsonbotsford))<br>