In catalogs directory of your jamkit app, run the following command:
git submodule add https://github.com/astaria/astaria-web3-sdk.git catalogs/MainApp/Scripts/astaria-web3-sdk
const Ethereum = require("astaria-web3-sdk/chains/ethereum");
const network = Ethereum.get_network_by_name("Mainnet");
const ethereum = Ethereum.create(network);
ethereum.api.get_balance("0xa4Dc2Fcb7e6B53cf5e8901FC8513F4d3e11AEb18")
.then((balance) => {
console.log(balance);
})
.catch((error) => {
console.log(error);
});