Hey I am getting "TypeError: Cannot read property 'publicKey' of undefined" on calling get request in NodeJS project. about cryptochain

Here is the index.js File

const bodyParser = require('body-parser');
const express = require('express');
const request = require('request');
//const path = require('path');
const Blockchain = require('./blockchain');
const PubSub = require('./app/pubsub');
const TransactionPool = require('./wallet/transaction-pool');
const Wallet = require('./wallet');

const app = express();
const blockchain = new Blockchain();
const transactionPool = new TransactionPool();
const wallet = new Wallet();
const pubsub = new PubSub({ blockchain, transactionPool });
//const transactionMiner = new TransactionMiner({ blockchain, transactionPool, wallet, pubsub });

const DEFAULT_PORT = 3000;
const ROOT_NODE_ADDRESS = `http://localhost:${DEFAULT_PORT}`;
 
app.use(bodyParser.json());

app.get('/api/blocks', (req, res) => {
    res.json(blockchain.chain);
});

app.post('/api/mine', (req, res) => {
    const { data } = req.body; 

    blockchain.addBlock({ data });
    
    pubsub.broadcastChain();
     
    res.redirect('/api/blocks');
});

app.post('/api/transact', (req, res) => {
    const { amount, recipient } = req.body;

    let transaction = transactionPool
        .existingTransaction({ inputAddress: wallet.publicKey });

    try {
        if (transaction) {
            transaction.update({ senderWallet: wallet, recipient, amount });
        } else {
            transaction = wallet.createTransaction({ recipient, amount });

        }
    } catch(error) {
        return res.status(400).json({ type: 'error', message: error.message });
    }

    transactionPool.setTransaction(transaction);

    pubsub.broadcastTransaction(transaction);

    console.log('transactionPool()', transactionPool);
  
    // let transaction = transactionPool
    //     .existingTransaction({ inputAddress: wallet.publicKey });
  
    res.json({ type: 'success', transaction });
});

app.get('/api/transaction-pool-map', (req, res) => {
    res.json(transactionPool.transactionMap);
});

const syncChains = ()=> {
    request({ url: `${ROOT_NODE_ADDRESS}/api/bocks` }, (error, response, body)=> {
        if (!error && response.statusCode === 200) {
            const rootChain = JSON.parse(body);
      
            console.log('replace transaction pool map on a sync with', rootChain);
            blockchain.replaceChain(rootChain);
        }
    });
} 

let PEER_PORT;

if (process.env.GENERATE_PEER_PORT === 'true') {
    PEER_PORT = DEFAULT_PORT + Math.ceil(Math.random() * 1000);
}

const PORT = PEER_PORT || DEFAULT_PORT;
app.listen(PORT, () => {
    console.log(`listening at localhost: ${PORT}`);

    if (PORT !== DEFAULT_PORT) {
        syncChains();
    }
});

when I try to send a get request using postman by following command
http://localhost:3000/api/transaction-pool-map
I got the above error.

[ironic833]

How did you fix this?

[MikeBelyayaev]

How did you fix this?

yeah. how?

[ironic833]

Fixed this by removing the mine block endpoint. Once being able to send proper transactions is implemented mining blocks is apart of that process. Do not strobe the mine-blocks endpoint via postman was my fix