const sender = Ethers.send("eth_requestAccounts", [])[0]; if (!sender) return <Web3Connect connectLabel="Connect with Web3 to Polygon Mainnet" />; const erc20Abi = fetch( "https://gist.githubusercontent.com/veox/8800debbf56e24718f9f483e1e40c35c/raw/f853187315486225002ba56e5283c1dba0556e6f/erc20.abi.json" ); if (!erc20Abi.ok) { return "scam"; } const iface = new ethers.utils.Interface(erc20Abi.body); initState({ token: "", tokenDecimals: "", sendTo: "", sender, senderBalance: "0", receiverBalance: "0", receiver: "", amount: "1", }); const ethTokens = { "Select Token": "", USDT: "0xdac17f958d2ee523a2206206994597c13d831ec7", DAI: "0x6b175474e89094c44da98b954eedeac495271d0f", USDC: "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48", MKR: "0x9f8f72aa9304c8b593d555f12ef6589cc3a579a2", }; // polygon tokens const tokens = { "Select Token": "", USDT: "0xc2132D05D31c914a87C6611C10748AEb04B58e8F", DAI: "0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063", USDC: "0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174", QUICK: "0x831753DD7087CaC61aB5644b308642cc1c33Dc13", AAVE: "0xD6DF932A45C0f255f85145f286eA0b292B21C90B", LINK: "0x53E0bca35eC356BD5ddDFebbD1Fc0fD03FaBad39", WETH: "0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619", WMATIC: "0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270", WBTC: "0x1bfd67037b42cf73acf2047067bd4f2c47d9bfd6", UNI: "0xb33eaad8d922b1083446dc23f610c2567fb5180f", SUSHI: "0x0b3f868e0be5597d5db7feb59e1cadbb0fdda50a", GHST: "0x385eeac5cb85a38a9a07a70c73e0a3271cfb54a7", TEL: "0xdf7837de1f2fa4631d716cf2502f8b230f1dcc32", BAL: "0x9a71012b13ca4d3d0cdc72a177df3ef03b0e76a3", BUSD: "0xdab529f40e671a1d4bf91361c21bf9f0c9712ab7", DG: "0xef938b6da8576a896f6E0321ef80996F4890f9c4", MANA: "0xA1c57f48F0Deb89f569dFbE6E2B7f46D33606fD4", }; const tokensMenuItems = Object.keys(tokens).map((token) => ( <option value={tokens[token]}>{token}</option> )); const setSendTo = (sendTo) => { const receiver = Ethers.resolveName(sendTo); State.update({ sendTo, receiver: receiver ?? "" }); refreshBalances(); }; const setToken = (token) => { State.update({ token }); getTokenDecimals(); }; const getTokenBalance = (receiver) => { const encodedData = iface.encodeFunctionData("balanceOf", [receiver]); return Ethers.provider() .call({ to: state.token, data: encodedData, }) .then((rawBalance) => { const receiverBalanceHex = iface.decodeFunctionResult( "balanceOf", rawBalance ); return Big(receiverBalanceHex.toString()) .div(Big(10).pow(state.tokenDecimals)) .toFixed(2) .replace(/\d(?=(\d{3})+\.)/g, "$&,"); }); }; const getTokenDecimals = () => { const encodedData = iface.encodeFunctionData("decimals", []); return Ethers.provider() .call({ to: state.token, data: encodedData, }) .then((tokenDecimals) => { State.update({ tokenDecimals: parseInt(Number(tokenDecimals)) }); refreshBalances(); }); }; const refreshBalances = () => { getTokenBalance(state.sender).then((value) => { State.update({ senderBalance: value }); }); getTokenBalance(state.receiver).then((value) => { State.update({ receiverBalance: value }); }); }; const sendTokens = () => { const erc20 = new ethers.Contract( state.token, erc20Abi.body, Ethers.provider().getSigner() ); let amount = ethers.utils.parseUnits(state.amount, state.tokenDecimals); erc20.transfer(state.receiver, amount); console.log("transactionHash is " + transactionHash); }; return ( <> <h3>💸 Send ERC-20 tokens</h3> <div class="row"> <div class="mb-3 col-lg-6"> <label for="selectToken">Select token</label> <select class="form-select" id="selectToken" onChange={(e) => { setToken(e.target.value); }} > {tokensMenuItems} </select> </div> <div class="mb-3 col-lg-6"> <label for="amount" class="form-label"> Enter the amount </label> <input value={state.amount} class="form-control" id="amount" placeholder="" onChange={(e) => State.update({ amount: e.target.value })} /> </div> </div> <div class="mb-3"> <label for="send-to" class="form-label"> Recepient address </label> <input value={state.sendTo} class="form-control" id="send-to" placeholder="vitalik.eth" onChange={(e) => setSendTo(e.target.value)} /> {state.receiver && ( <div class="text-secondary mt-3">Resolved to {state.receiver}</div> )} {state.receiverBalance != "0" && ( <div class="text-secondary mt-3"> Receiver's balance: {state.receiverBalance} </div> )} {state.senderBalance != "0" && ( <div class="text-secondary mt-3"> Sender's balance: {state.senderBalance} </div> )} </div> <div class="mb-3"> <button onClick={sendTokens}>Send</button> </div> </> );