Kekkai/collect-currency/save_crypto.js

const config = require('../shared/config/src/main.js')();
const axios = require('axios');
const pool = require('../shared/database/src/postgresql.js');
const logger = require('../shared/logger/src/main.js');

const coinapiKeys = config['currency']['coinapiKeys'];
let apiKeyIndex = 0;
let depth = coinapiKeys.length;

function save_crypto() {
    if (!config['currency']['collecting']['crypto']) return;
    if (coinapiKeys[apiKeyIndex] === undefined) return;

    if (depth <= 0) {
        logger.info('Rate limit on all coinapi API keys');
        new Error('Rate limit on all coinapi API keys');
        return;
    }

    logger.info(
        `Active coinapi key: ${coinapiKeys[apiKeyIndex]} (${coinapiKeys.length - 1} / ${apiKeyIndex})`,
    );

    config['currency']['crypto'].forEach((value) =>
        config['currency']['crypto'].forEach((pair) => {
            if (value === pair) return;

            axios
                .get(
                    `https://rest.coinapi.io/v1/exchangerate/${value}/${pair}`,
                    {
                        timeout: 3000,
                        headers: {
                            'X-CoinAPI-Key': coinapiKeys[apiKeyIndex],
                        },
                    },
                )
                .then(async (res) => {
                    const data = res.data;
                    const point = data['rate'].toString().indexOf('.') + 4;

                    logger.debug(JSON.stringify(data));

                    const db = await pool.query(
                        'SELECT * FROM currency WHERE from_currency = $1 AND conv_currency = $2 AND date = $3',
                        [
                            value,
                            pair,
                            new Date(data['time']).toLocaleDateString(),
                        ],
                    );

                    if (db['rows'][0]) return;
                    await pool.query(
                        `INSERT INTO currency (from_currency, conv_currency, rate, date) 
                                    VALUES ($1, $2, $3, $4)`,
                        [
                            value,
                            pair,
                            data['rate'].toString().slice(0, point),
                            new Date(data['time']).toLocaleDateString(),
                        ],
                    );
                })
                .catch((err) => {
                    if (err.response?.data.detail)
                        logger.error(err.response.data.detail);
                    if (err.response?.data.status === 429) {
                        logger.info('CoinAPI rate limited, rotating token');
                        rotate_key(coinapiKeys);
                        depth--;
                        save_crypto();
                    }
                });
        }),
    );
}

/**
 * Changing API keys
 * @param {Array} list - List of all keys
 * @returns {number} - Outputs the number of the key that should work
 */

function rotate_key(list) {
    apiKeyIndex = list.indexOf(coinapiKeys[apiKeyIndex]) + 1;
}

module.exports = save_crypto;