Pera Connect
JavaScript SDK for integrating Pera Wallet to web applications.
View at GitHub - View at NPM - View at Yarn

What is @perawallet/connect?

@perawallet/connect is a JavaScript SDK for integrating Pera Wallet to web applications. You can use this SDK to connect to a dApp, sign transactions, etc. using Pera Wallet.
@perawallet/connect is maintained by the Pera Team. For more detailed information you can read this document or the GitHub readme.

Quick Start

Let's look at how we can connect Pera Wallet to our dApp using @perawallet/connect. We will use React for these examples, but you can also use @perawallet/connect with other frameworks. For this, you can take a look at the example applications section. Let’s start!
  1. 1.
    First, install @perawallet/connect
npm install --save @perawallet/connect
-- or --
yarn add @perawallet/connect
After that you can import the SDK into your React app like this using:
import {PeraWalletConnect} from "@perawallet/connect"
2. Create the PeraWalletConnect instance
const peraWallet = new PeraWalletConnect();
When creating a new instance, you can control whether an information toast will appear when signing a transaction:
It's enabled by default but in some cases, you may not need the toast message (e.g. you already have signing guidance for users). To disable it, use the shouldShowSignTxnToast option:
const peraWallet = new PeraWalletConnect({
shouldShowSignTxnToast: false
});
3. Create connect example button for wallet connection:
function App() {
// Store account address which is connected dApp with Pera Wallet
const [accountAddress, setAccountAddress] = (useState < string) | (null > null);
// Check app is connected with Pera Wallet
const isConnectedToPeraWallet = !!accountAddress;
return (
<button
onClick={
isConnectedToPeraWallet ? handleDisconnectWalletClick : handleConnectWalletClick
}>
{isConnectedToPeraWallet ? "Disconnect" : "Connect to Pera Wallet"}
</button>
);
}
4. Create handler methods for Pera Wallet connection handleWalletConnectClick()
function handleConnectWalletClick() {
peraWallet
.connect()
.then((newAccounts) => {
// Setup the disconnect event listener
peraWallet.connector?.on("disconnect", handleDisconnectWalletClick);
setAccountAddress(newAccounts[0]);
})
.reject((error) => {
// You MUST handle the reject because once the user closes the modal, peraWallet.connect() promise will be rejected.
// For the async/await syntax you MUST use try/catch
if (error?.data?.type !== "CONNECT_MODAL_CLOSED") {
// log the necessary errors
}
});
}
handleDisconnectWalletClick()
function handleDisconnectWalletClick() {
peraWallet.disconnect();
setAccountAddress(null);
}
We use them in the onClick event of the button that we created in the previous step. If there is an account connected to the dApp, we use the handleDisconnectWalletClick() function, if there is no account connected, we use the handleWalletConnectClick() function.
5. If you don't want the user's account information to be lost by the dApp when the user closes the browser with with the wallet connection to the dApp, you need to handle the reconnect session status. You can do this in the following way:
useEffect(() => {
// Reconnect to the session when the component is mounted
peraWallet.reconnectSession().then((accounts) => {
// Setup the disconnect event listener
peraWallet.connector?.on("disconnect", handleDisconnectWalletClick);
if (accounts.length) {
setAccountAddress(accounts[0]);
}
});
}, []);
After these 5 steps, you can use your dApp making new transactions with Pera Wallet 🎊. Your App.tsx file will look like this.
import {PeraWalletConnect} from "@perawallet/connect";
// Create the PeraWalletConnect instance outside of the component
const peraWallet = new PeraWalletConnect();
function App() {
const [accountAddress, setAccountAddress] = (useState < string) | (null > null);
const isConnectedToPeraWallet = !!accountAddress;
useEffect(() => {
// Reconnect to the session when the component is mounted
peraWallet.reconnectSession().then((accounts) => {
// Setup the disconnect event listener
peraWallet.connector?.on("disconnect", handleDisconnectWalletClick);
if (accounts.length) {
setAccountAddress(accounts[0]);
}
});
}, []);
return (
<button
onClick={
isConnectedToPeraWallet ? handleDisconnectWalletClick : handleConnectWalletClick
}>
{isConnectedToPeraWallet ? "Disconnect" : "Connect to Pera Wallet"}
</button>
);
function handleConnectWalletClick() {
peraWallet
.connect()
.then((newAccounts) => {
// Setup the disconnect event listener
peraWallet.connector?.on("disconnect", handleDisconnectWalletClick);
setAccountAddress(newAccounts[0]);
})
.reject((error) => {
// You MUST handle the reject because once the user closes the modal, peraWallet.connect() promise will be rejected.
// For the async/await syntax you MUST use try/catch
if (error?.data?.type !== "CONNECT_MODAL_CLOSED") {
// log the necessary errors
}
});
}
function handleDisconnectWalletClick() {
peraWallet.disconnect();
setAccountAddress(null);
}
}
When you want to use @perawallet/connect library with React 18, you need to make some changes. react-scripts stopped polyfilling some of the packages with the [email protected] version. After creating a new app with npx create-react-app my-app or in your react application, the following changes should be made.
  1. 1.
    Firstly, install the following packages.
npm install buffer
npm install crypto-browserify
npm install process
npm install react-app-rewired
npm install stream-browserify
2. After that you need to override some webpack features. Create the following file in the root directory of the project and copy the following code block into it.
config-overrides.js
// eslint-disable-next-line @typescript-eslint/no-var-requires
const webpack = require('webpack');
module.exports = function override(config) {
const fallback = config.resolve.fallback || {};
Object.assign(fallback, {
crypto: require.resolve('crypto-browserify'),
stream: require.resolve('stream-browserify'),
});
config.resolve.fallback = fallback;
// ignore warning about source map of perawallet/connect
config.ignoreWarnings = [/Failed to parse source map/];
config.plugins = (config.plugins || []).concat([
new webpack.ProvidePlugin({
process: 'process/browser',
Buffer: ['buffer', 'Buffer'],
}),
]);
return config;
};
3. You need to update react-scripts version to 5.0.1 or higher.
{
"react-scripts": "5.0.1",
}
4. Finally, you need to update the npm scripts
{
"start": "react-app-rewired start",
"build": "react-app-rewired build"
}
After that, you are good to go! 🎊

Signing Transactions

@perawallet/connect also allows signing transactions using the Pera Wallet application. Once the signTransaction method is triggered, if the user is on a mobile browser, the Pera Wallet app will be launched automatically. If the browser blocks the redirection there's also a popup that links to the Pera Wallet app. There's an option called shouldShowSignTxnToast to disable it, see the example below:
const peraWallet = new PeraWalletConnect({shouldShowSignTxnToast: false});
You can also call the closePeraWalletSignTxnToast function to hide the toast.
import {closePeraWalletSignTxnToast} from "@perawallet/connect";
// ...Business logic
// Close the toast message
closePeraWalletSignTxnToast();
signTransaction accepts SignerTransaction[][] the type can be find below:
import {Transaction} from "algosdk";
export interface SignerTransaction {
txn: Transaction;
/**
* Optional list of addresses that must sign the transactions.
* Wallet skips to sign this txn if signers is empty array.
* If undefined, wallet tries to sign it.
*/
signers?: string[];
}
You have to follow these steps to a sign transaction.
  1. 1.
    Set up algosdk client
const algod = new algosdk.Algodv2("", "<https://node.testnet.algoexplorerapi.io/>", 443);
2. Set up Transactions
const suggestedParams = await algod.getTransactionParams().do();
const optInTxn = algosdk.makeAssetTransferTxnWithSuggestedParamsFromObject({
from: FROM_ADDRESS,
to: FROM_ADDRESS,
assetIndex: ASSET_ID,
amount: 0,
suggestedParams
});
const optInTxn2 = algosdk.makeAssetTransferTxnWithSuggestedParamsFromObject({
from: FROM_ADDRESS,
to: FROM_ADDRESS,
assetIndex: ASSET_ID,
amount: 0,
suggestedParams
});
3. Map Transaction to SignerTransaction[]
const singleTxnGroups = [{txn: optInTxn, signers: [FROM_ADDRESS]}];
const multipleTxnGroups = [
{txn: optInTxn, signers: [FROM_ADDRESS]},
{txn: optInTxn2, signers: [FROM_ADDRESS]}
];
4. (Optional step) Create some utility functions to create the transaction before the sign transaction function.
Before creating utility functions, you need to import some libraries.
import {SignerTransaction} from "@perawallet/connect/dist/util/model/peraWalletModels";
import algosdk from "algosdk";
import algod from "./algod";
generateOptIntoAssetTxns({assetID, initiatorAddr})
async function generateOptIntoAssetTxns({
assetID,
initiatorAddr
}: {
assetID: number;
initiatorAddr: string;
}): Promise<SignerTransaction[]> {
const suggestedParams = await algod.getTransactionParams().do();
const optInTxn = algosdk.makeAssetTransferTxnWithSuggestedParamsFromObject({
from: initiatorAddr,
to: initiatorAddr,
assetIndex: assetID,
amount: 0,
suggestedParams
});
return [{txn: optInTxn, signers: [initiatorAddr]}];
}
generatePaymentTxns({to, initiatorAddr})
async function generatePaymentTxns({
to,
initiatorAddr
}: {
to: string;
initiatorAddr: string;
}) {
const suggestedParams = await algod.getTransactionParams().do();
const txn = algosdk.makePaymentTxnWithSuggestedParamsFromObject({
from: initiatorAddr,
to,
amount: 1,
suggestedParams
});
return [{txn, signers: [initiatorAddr]}];
}
generateAssetTransferTxns({to, assetID, initiatorAddr})
async function generateAssetTransferTxns({
to,
assetID,
initiatorAddr
}: {
to: string;
assetID: number;
initiatorAddr: string;
}) {
const suggestedParams = await algod.getTransactionParams().do();
const txn = algosdk.makeAssetTransferTxnWithSuggestedParamsFromObject({
from: initiatorAddr,
to,
assetIndex: assetID,
amount: 1,
suggestedParams
});
return [{txn, signers: [initiatorAddr]}];
}
5. After this, you can sign a single transaction or group transaction using promises.
Single Transaction
try {
const signedTxn = await peraWallet.signTransaction([singleTxnGroups]);
} catch (error) {
console.log("Couldn't sign Opt-in txns", error);
}
Group Transaction
try {
const signedTxns = await peraWallet.signTransaction([multipleTxnGroups]);
} catch (error) {
console.log("Couldn't sign Opt-in txns", error);
}
Payment Transactions
const txGroups = await generatePaymentTxns({
to: "GD64YIY3TWGDMCNPP553DZPPR6LDUSFQOIJVFDPPXWEG3FVOJCCDBBHU5A",
initiatorAddr: accountAddress!
});
try {
const signedTxnGroup = await peraWallet.signTransaction([txGroups]);
const {txId} = await algod.sendRawTransaction(signedTxnGroup).do();
} catch (error) {
console.log("Couldn't sign payment txns",error);
}
Asset Transfer Transactions
const txGroups = await generateAssetTransferTxns({
to: "GD64YIY3TWGDMCNPP553DZPPR6LDUSFQOIJVFDPPXWEG3FVOJCCDBBHU5A",
assetID: 10458941,
initiatorAddr: accountAddress!
});
try {
const signedTxnGroup = await peraWallet.signTransaction([txGroups]);
console.log(signedTxnGroup);
const {txId} = await algod.sendRawTransaction(signedTxnGroup).do();
} catch (error) {
console.log("Couldn't sign asset transfer txns",error);
}
Opt-In Asset Transactions
const txGroups = await generateOptIntoAssetTxns({
assetID: 10458941,
initiatorAddr: accountAddress!
});
try {
await peraWallet.signTransaction([txGroups]);
} catch (error) {
console.log("Couldn't sign Opt-in txns",error);
}
Multiple Transactions
const optinTxGroups = await generateOptIntoAssetTxns({
assetID: 10458941,
initiatorAddr: accountAddress!
});
const transferTxGroups = await generateAssetTransferTxns({
to: "GD64YIY3TWGDMCNPP553DZPPR6LDUSFQOIJVFDPPXWEG3FVOJCCDBBHU5A",
assetID: 10458941,
initiatorAddr: accountAddress!
});
try {
const signedTxnGroups = await peraWallet.signTransaction([
optinTxGroups,
transferTxGroups
]);
console.log(signedTxnGroups);
// Sign every txn in the group
for (const signedTxnGroup of signedTxnGroups) {
const {txId} = await algod.sendRawTransaction(signedTxnGroup).do();
console.log(`txns signed successfully! - txID: ${txId}`);
}
} catch (error) {
console.log("Couldn't sign all txns",error);
}

Customization

@perawallet/connect lets you change a few things based on your dApp's needs.
  1. 1.
    Change Pera Wallet Connect Modal z-index to avoid conflicts
.pera-wallet-connect-modal {
// The default value of z-index is 10. You can lower and raise it as much as you want.
z-index: 11;
}
2. Remove Sign Guidance Toast
const peraWallet = new PeraWalletConnect({
shouldShowSignTxnToast: false
});
3. Close Sign Guidance Toast
import {closePeraWalletSignTxnToast} from "@perawallet/connect";
// ...Business logic
// Close the toast message
closePeraWalletSignTxnToast();
4. Your app name on Pera Wallet
By default, the connect wallet drawer on Pera Wallet gets the app name from document.title.
In some cases, you may want to customize it. You can achieve this by adding a meta tag to your HTML between the head tag.
<meta name="name" content="My dApp" />

Example Applications

Brand Guidelines

Please follow our brand guidelines when using @perawallet/connect in your dApp. To download our Media Kit that includes useful assets such as the official Pera logo, App images, roadmap, and official links, please visit our website.
Export as PDF
Copy link
On this page
What is @perawallet/connect?
Quick Start
Signing Transactions
Customization
Example Applications
Brand Guidelines