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server.js
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server.js
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const { pSOLInterestRate, pBTCInterestRate, paiInterestRate } = require("./lib.js");
const http = require("http");
let cache = {};
async function update() {
try {
const pai = await paiInterestRate();
const pSOL = await pSOLInterestRate();
const pBTC = await pBTCInterestRate();
cache = {
updatedAt: new Date(),
pai,
pSOL,
pBTC,
}
} catch (e) {
console.log("ERR", e);
}
}
setInterval(update, 5 * 60 * 1000);
update();
http
.createServer(function (req, res) {
const pai = JSON.stringify(cache.pai, "", " ");
const pSOL = JSON.stringify(cache.pSOL, "", " ");
const pBTC = JSON.stringify(cache.pBTC, "", " ");
const rd = function (x) {
const ir = (x || { interestRate: 0 }).interestRate
return Math.round(ir * 100) / 100;
};
const template = `
<html>
<head>
<title>Interest rate tracker</title>
</head>
<body>
<h1>Interest rate tracker</h1>
<p>
<label>URL:</label>
<ul>
<li>
PAI
<a href="https://gopartyparrot.medium.com/introducing-leverage-interest-rate-to-incentivize-parrot-stability-pool-3179c7c192ce">medium</a>
<a href="https://www.mercurial.finance/pools/pai-3pool">mercurial</a>
</li>
<li>
pSOL
<a href="https://gopartyparrot.medium.com/introducing-leverage-interest-rate-to-incentivize-psol-stability-95b2e67d3faa">medium</a>
<a href="https://trade.dexlab.space/#/market/2SSWeXgcXrCqEEf2A8kN16rRidGVXWdskP8ASdrcWTpC">serum</a>
<a href="https://www.mercurial.finance/pools/psol-2pool">mercurial</a>
</li>
<li>
pBTC
<a href="https://gopartyparrot.medium.com/introducing-leverage-interest-rate-to-incentivize-pbtc-stability-174525d32753">medium</a>
<a href="https://trade.dexlab.space/#/market/2ZXno5u6RiEAj4Gu9pW2kKxKwbVR4ApB2iDqpGc93qb3">serum</a>
<a href="https://app.saber.so/pools/pbtc/deposit">saber</a>
</li>
</ul>
</p>
<div><label>Detail:</label></div>
<p><code>interestRate = leverageCoefficient * (tokenReserve - liquidityReserve) / liquidityReserve</code></p>
<table>
<tr>
<td>PAI ${rd(cache.pai)}</td>
<td>pSOL ${rd(cache.pSOL)}</td>
<td>pBTC ${rd(cache.pBTC)}</td>
</tr>
<tr>
<td><pre>${pai}</pre></td>
<td><pre>${pSOL}</pre></td>
<td><pre>${pBTC}</pre></td>
</tr>
</table>
</body>
</html>`
res.writeHead(200);
res.end(template);
})
.listen(8080);