1 line
1.2 KiB
JavaScript
1 line
1.2 KiB
JavaScript
let isMetamaskConnected=!1;function connectToMetaMask(){return void 0===window.ethereum?console.log("Please install MetaMask."):ethereum.request({method:"eth_requestAccounts"}).then((()=>{console.log("MetaMask connected"),isMetamaskConnected=!0})).catch((error=>{4001===error.code?console.log("Please connect to MetaMask."):console.error(error),isMetamaskConnected=!1}))}async function checkUSDCBalance(ethAddress){try{isMetamaskConnected||await connectToMetaMask();const provider=new ethers.providers.Web3Provider(window.ethereum),usdcContractAddress="0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",usdcContract=new ethers.Contract(usdcContractAddress,["function balanceOf(address) view returns (uint256)"],provider);return await usdcContract.balanceOf(ethAddress)}catch(e){console.log(e)}}async function checkUSDTBalance(ethAddress){try{isMetamaskConnected||await connectToMetaMask();const provider=new ethers.providers.Web3Provider(window.ethereum),usdtContractAddress="0xdac17f958d2ee523a2206206994597c13d831ec7",usdtContract=new ethers.Contract(usdtContractAddress,["function balanceOf(address) view returns (uint256)"],provider);return await usdtContract.balanceOf(ethAddress)}catch(e){console.log(e)}} |