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Copy pathserver.js
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88 lines (75 loc) · 2.72 KB
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const express = require('express');
const bodyParser = require('body-parser');
const Web3 = require('web3');
const config = require('./config.json');
const walletPrivateKey = process.env.walletPrivateKey;
const web3 = new Web3('https://mainnet.infura.io/v3/_your_api_key_here_');
web3.eth.accounts.wallet.add(walletPrivateKey);
const myWalletAddress = web3.eth.accounts.wallet[0].address;
const cEthAddress = config.cEthAddress;
const cEthAbi = config.cEthAbi;
const cEthContract = new web3.eth.Contract(cEthAbi, cEthAddress);
const app = express();
const port = 3000;
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.route('/protocol-balance/eth/').get((req, res) => {
cEthContract.methods.balanceOfUnderlying(myWalletAddress).call()
.then((result) => {
const balanceOfUnderlying = web3.utils.fromWei(result);
return res.send(balanceOfUnderlying);
}).catch((error) => {
console.error('[protocol-balance] error:', error);
return res.sendStatus(400);
});
});
app.route('/wallet-balance/eth/').get((req, res) => {
web3.eth.getBalance(myWalletAddress).then((result) => {
const ethBalance = web3.utils.fromWei(result);
return res.send(ethBalance);
}).catch((error) => {
console.error('[wallet-balance] error:', error);
return res.sendStatus(400);
});
});
app.route('/wallet-balance/ceth/').get((req, res) => {
cEthContract.methods.balanceOf(myWalletAddress).call().then((result) => {
const cTokenBalance = result / 1e8;
return res.send(cTokenBalance.toString());
}).catch((error) => {
console.error('[wallet-ctoken-balance] error:', error);
return res.sendStatus(400);
});
});
app.route('/supply/eth/:amount').get((req, res) => {
if (isNaN(req.params.amount)) {
return res.sendStatus(400);
}
cEthContract.methods.mint().send({
from: myWalletAddress,
gasLimit: web3.utils.toHex(500000),
gasPrice: web3.utils.toHex(20000000000),
value: web3.utils.toHex(web3.utils.toWei(req.params.amount, 'ether'))
}).then((result) => {
return res.sendStatus(200);
}).catch((error) => {
console.error('[supply] error:', error);
return res.sendStatus(400);
});
});
app.route('/redeem/eth/:cTokenAmount').get((req, res) => {
if (isNaN(req.params.cTokenAmount)) {
return res.sendStatus(400);
}
cEthContract.methods.redeem(req.params.cTokenAmount * 1e8).send({
from: myWalletAddress,
gasLimit: web3.utils.toHex(500000),
gasPrice: web3.utils.toHex(20000000000)
}).then((result) => {
return res.sendStatus(200);
}).catch((error) => {
console.error('[redeem] error:', error);
return res.sendStatus(400);
});
});
app.listen(port, () => console.log(`API server running on port ${port}`));