@biconomy/mexa v3.0.6
Enable meta transactions or gasless transactions in your DApp by integrating
Mexa SDK in your DApp
Biconomy SDK (Mexa)
Introduction
Biconomy SDK (Mexa), enables meta transactions or gasless transactions in your DApp (Decentralized Application) out of the box without any change in your smart contracts and just a few lines of code in your DApp to integrate mexa.
By using Mexa, dapp users are able to use the dapp and send transactions free of cost while developer pays the gas fee on their behalf as a part of user acquisition cost.
Let’s Get Started
- Go to Mexa Dashboard to register your DApp and methods on which to enable meta transactions and copy your DApp ID and API Key.
- Install Biconomy SDK (Mexa)
npm install @biconomy/mexa
Import and initialize mexa and web3
import { Biconomy } from "@biconomy/mexa";
const biconomy = new Biconomy(<web3 provider>,{apiKey: <API Key>});
web3 = new Web3(biconomy);
Note: <web3 provider> could be window.ethereum for Metamask or portis.provider for Portis and so on.
Initialize your dapp after mexa initialization
biconomy.onEvent(biconomy.READY, () => {
// Initialize your dapp here
}).onEvent(biconomy.ERROR, (error, message) => {
// Handle error while initializing mexa
});
Congratulations!! You have now enabled meta transactions in your DApp. Interact with web3 the way you have been doing it.
Now whenever there is a write transaction action initiated from user (registered in mexa dashboard also), mexa will ask for user’s signature and handle the transaction rather than sending signed transaction directly to blockchain from user’s wallet.
Configuration
Biconomy constructor takes 2 parameters
const biconomy = new Biconomy(<existing web3 provider>, options);
<existing web3 provider>
object
required
Any web3 provider that supports personal_sign
, eth_accounts
, eth_sendTransaction
, eth_call
RPC methods and web3 subscriptions.
For example, it can be window.ethereum
for Metamask or portis.provider
for Portis and so on.
options
object
required
A json object having configuration values for initializing mexa sdk.
For metamask biconomy initialization code would look like:
let options = {
apiKey: <API KEY>,
strictMode: true
};
const biconomy = new Biconomy(window.ethereum, options);
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