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server.js
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server.js
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const express = require('express')
const axios = require('axios')
const { ethers } = require('ethers')
const createCsvWriter = require('csv-writer').createObjectCsvWriter;
require('dotenv').config()
const app = express()
const apiKey = process.env.API_KEY;
class Block{
constructor(timeStamp,blockReward) {
this.timeStamp = timeStamp;
this.blockReward = blockReward;
}
}
const fetchData = async() => {
try{
let listOfBlocks = [];
for(let blockNumber = 17460527; blockNumber<17460827;blockNumber++) {
const apiUrl = `https://api.etherscan.io/api?module=block&action=getblockreward&blockno=${blockNumber}&apikey=${apiKey}`;
const response = await axios.get(apiUrl);
const rewardEther = ethers.utils.formatEther(response.data.result.blockReward);
const timeStamp = response.data.result.timeStamp;
const block = new Block(timeStamp, rewardEther);
listOfBlocks.push(block);
}
exportToCsv(listOfBlocks);
} catch (error) {
console.error(error);
}
}
const exportToCsv = (data) => {
const csvWriter = createCsvWriter({
path: 'block_data.csv',
header: [
{id: 'timeStamp', title: 'timeStamp'},
{id: 'blockReward', title: 'blockReward'}
]
});
csvWriter.writeRecords(data).then(()=> {
console.log("CSV file created successfully!");
})
.catch((error) => {
console.error(error);
});
};
fetchData();
app.listen(8080,()=>{
console.log("Server is Running");
})