The 0xArc Analytics SDK is a simple SDK that helps provide higher fidelity analytics by merging on-chain data with off-chain data from front-ends. We value user privacy and do not collect IP addresses or scrape any information without your permission.

Installation Guide

Option 1 - via script tag (Metamask only)

---

Add the following to your index.html:

<script>
  const script = document.createElement('script')
  const apiKey = YOUR_API_KEY
  const config = {} // Add any configuration parameters you'd like here
  script.src = '<https://unpkg.com/@arcxmoney/analytics>'
  script.onload = function () {
    ArcxAnalyticsSdk.init(apiKey, config, 'script-tag').then(function (sdk) {
      window.arcx = sdk
    })
  }

  document.head.appendChild(script)
</script>

That’s it! The 0xArc SDK will automatically detect wallet connections, referrer data, button clicks, page tracks and transactions that occur on your front-end.

You will now have access to the 0xArc SDK instance via window.arcx anywhere in the app, in case you want to use any specific functionality described in the API section below.

Option 2 (via React Component)

---

1. Install the npm package:

yarn add @arcxmoney/analytics

or

npm install @arcxmoney/analytics --save

2. Use the ArcxAnalyticsProvider anywhere at the top of your component tree.

import React from 'react'
import ReactDOM from 'react-dom'
import { ArcxAnalyticsProvider } from '@arcxmoney/analytics'
import App from './App' // Import your main App component

const apiKey = 'YOUR_API_KEY' // Replace with your actual 0xArc analytics API key

const RootComponent = () => (
  <ArcxAnalyticsProvider apiKey={apiKey}>
    <App />
  </ArcxAnalyticsProvider>
)

ReactDOM.render(<RootComponent />, document.getElementById('root'))

3. Track wallet connection events whenever a wallet is connected

const WalletConnectionTracker = () => {
  const { account, chainId } = useWeb3React()
  const sdk = useArcxAnalytics()

  useEffect(() => {
    if (account && chainId) {
      // Track the wallet connection with the SDK
      sdk.wallet({
        chainId,
        account,
      })
    }
  }, [account, chainId, sdk]) // Re-run this effect if account or chainId changes

  return <div>Tracking wallet connections with useWeb3React.</div>
}

4. Track transactions

const TransactionButton = () => {
  const { account, chainId } = useWeb3React()
  const arcxAnalytics = useArcxAnalytics()

  const handleTransactionSubmit = async () => {
    // Example: Simulating a transaction call
    // In a real scenario, you would replace this with your transaction logic,
    // for example, using ethers.js or web3.js to interact with a smart contract

    const transactionHash = '0x023c0e7...' // Placeholder for the actual transaction hash

    // Assuming the transaction was successful and you have the hash
    // Now, track the transaction using the analytics SDK
    arcxAnalytics.transaction({
      transactionHash,
      account, // Optional: if not passed, the SDK will use the account from the last wallet() call
      chainId, // Optional: if not passed, the SDK will use the chainId from the last chain or wallet call
      metadata: {
        // Example metadata
        action: 'User Initiated Transaction',
      },
    })

    console.log('Transaction tracked!')
  }

  return <button onClick={handleTransactionSubmit}>Submit Transaction</button>
}

You are now ready to go! For additional methods supported, please see below.

Available SDK methods

Method	Parameters	Description
wallet	- chainId: string or number - account: string	Track a wallet connection event
chain	- chainId: string or number - account: string (optional). Will use the account value in the wallet() call if not passed	Track a chain changed event
transaction	- transactionHash: string - account: string (optional). Will use the account value in the wallet() call if not passed - chainId: string or number (optional). If not provided, the previously recorded chainID will be used - metadata: dictionary (optional). This is additional information about the transaction you might want to pass	Track a transaction event
signature	- message: string - message that was signed - signatureHash: string (optional) - account: string. Will use the account value in the wallet() call if not passed	Track a signature transaction
disconnection	- account: string (optional). The disconnected account. Will use the previously recorded account if not passed - chainId: string or number (optional). Will use the previously recorded chain ID if not passed.	Track a wallet disconnection event.
event	- name: string. The name of the event - attributes: dictionary (optional)	Track a custom event
page		Track a page view (current page). Note that you only have to call this if trackPages is set to false in the config.

Option 3 (via manual instantiation)

---

---

1. Install the npm package:

yarn add @arcxmoney/analytics

or

npm install @arcxmoney/analytics --save

2. Initialize the SDK and keep an instance of it ready to reference in other parts of your app. To do this, add the following code on your app’s load:

import { ArcxAnalyticsSdk } from '@arcxmoney/analytics'

const sdk = await ArcxAnalyticsSdk.init(API_KEY, {
  // list any features you'd like to disable here
  trackPages: false,
  trackWalletConnections: false,
})

3. Track the blockchain-related and custom events you want using the method list from step 2 above.

SDK Configuration

Regardless of which installation method you choose, you can disable any automatic tracking feature you want by passing an optional config parameter either to the init function or to the React provider.

The configuration options are:

Config key	Type	Description	Default
cacheIdentity	boolean	Caches the identity of users in the browser's local storage to capture cross-session behaviours	true
trackPages	boolean	Tracks whenever there is a URL change during the session and logs it automatically.	true
trackWalletConnections	boolean	Automatically track wallet connections (Metamask only)	true
trackChainChanges	boolean	Automatically track chain ID changes (Metamask only)	true
trackTransactions	boolean	Automatically track transaction requests (Metamask only)	true
trackSigning	boolean	Automatically track signing requests (Metamask only)	true
trackClicks	boolean	Automatically track click events	true

API

init

To initialize the Analytics SDK one should invoke the init method on the class. This configures the SDK with your API key and, optionally, configuration options.

Note: you do not need to call this function if using the React provider.

Parameters:

• apiKey (string) - the 0xArc-provided API key.
• config (object) - overrides of the SDK configuration above.

await analytics = await ArcxAnalyticsSdk.init(
  YOUR_API_KEY, // The 0xArc-provided API key
  {
    cacheIdentity: true,
    trackReferrer: true,
    trackPages: true,
    trackUTM: true,
    trackTransactions: true,
  }
)

event

A generic, catch-all event log. Use this method when no existing methods satisfy your requirements.

Parameters:

• event (string) - the ID used to track this specific event.
• attributes (object) - an arbitrarily structured object of event information.

Example:

await analytics.event('CHANGED_PFP', {
  oldPFP: 'dingo',
  newPFP: 'unicorn',
})

page

Allows manual logging page visit events. Only use this method when trackPages is set to false.

Parameters:

• (none)

Example:

await analytics.page()

wallet

Logs when a user connects their wallet to the dApp.

Parameters:

• attributes (object)
  • chainId (number) - the chain ID to which this address is connected on.
  • account (string) - the address of the connected wallet on the supplied chain.

Example:

await analytics.wallet({
  account: '0x123',
  chainId: 1,
})

disconnection

Logs a wallet disconnection event. This function will clear the cached known chain ID and account.

Parameters:

• attributes (object, optional)
  • account (string, optional) - The disconnected account address. If not provided, the function will use the previously recorded account address.
  • chainId (string | number, optional) - The chain ID from which the wallet was disconnected. If not passed, the function will use the previously recorded chain ID.

Example:

await analytics.disconnection({
  account: '0x123',
  chainId: 1,
})

chain

Logs when there is a change in the blockchain the user’s wallet is connected to. This function is instrumental in tracking user behaviour associated with different chains, facilitating a richer analysis in your 0xArc analytics setup.

Parameters:

• attributes (object)
  • chainId (number | string) - The updated chain ID to which the wallet is connected. It should be provided in either a hexadecimal or decimal format to facilitate the change log. This parameter is mandatory to invoke the function.
  • account (string, optional) - The account associated with the chain change event. If not specified, the function automatically resorts to using the previously recorded account from the last connectWallet() call or retrieves it from Metamask if it’s in use and the trackWalletConnections config is turned on.

Example:

arcx.chain({ chainId: '1', account: '0x1234' })

transaction

Logs when a transaction is submitted by a user.

Parameters:

• attributes (object)
  • chainId (string | number) - the chain ID where the transaction took place.
  • transactionHash (string) - the transaction hash of the transaction.
  • metadata (object) - an optional collection of transaction metadata that you wish to capture.

Example:

await analytics.transaction({
  chainId: 1,
  transactionHash: '0xABCabc123',
})

signature

Logs a signing event when a message is signed.

Parameters:

• options (object)
• message (string) - The message that was signed. This parameter is required and cannot be empty.
  • signatureHash (string, optional) - The hash of the signature. If not provided, it will be excluded from the event attributes.
• account (string, optional) - The account that signed the message. If not provided, the SDK will use the previously recorded account.

Example:

await analytics.signature({
  message: 'Hello, world!',
  signatureHash: '0x123abc',
  account: '0x123',
})

Important Notes

We do not support automatic wallet activity tracking with wallets other than Metamask.

Unless your dApp uses only Metamask, you need to either use the installation option 2 or 3.

Development notes

To run a local version of the script:

1. Run yarn build at the root level to build the script.
2. Run yarn copy-build-example to copy the built contents into the example/cra-script-tag project.
3. Make a copy of .env.example and rename it to .env in the example/cra-script-tag folder.
4. Make sure to add your 0xArc API + Alchemy keys to the .env file (find YOUR_KEY_HERE).
5. Run cd example/cra-script-tag && yarn && yarn start to start the example app.