feat: improve cache, refactor code, add api key support

This commit is contained in:
recanman 2024-09-09 22:54:33 -07:00
parent 01365b4c51
commit 2025ef0a91
4 changed files with 118 additions and 54 deletions

4
.gitignore vendored
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@ -7,6 +7,10 @@
# Coingecko export data
/coingecko.json
/coingecko-original.json
/coingecko-currencies.json
# Secret files
/secrets.php
# Compiled files
/js/

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@ -117,6 +117,18 @@ return [
];
```
Create a `secrets.php` file in the root directory to store CoinGecko API keys. Example:
```php
<?php
return [
'coingecko_api_key' => 'CG-xxxx',
'coingecko_key_is_demo' => true,
];
```
**Note:** The `secrets.dist.php` file should not be accessible from the web server.
### Fetching Exchange Rates
Exchange rates are fetched from the CoinGecko API. The `coingecko.php` file handles the API requests and attempts to update exchange rates every 5 seconds. Due to the rate limits of the CoinGecko API, actual update intervals may vary and are closer to 60 seconds.

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@ -6,78 +6,121 @@ date_default_timezone_set('Europe/Berlin');
// Define currencies that should *not* be included in the list
$excludedCurrencies = ['bits', 'sats'];
// Fetch the previously stored data
$previousData = json_decode(file_get_contents("coingecko.json"), true);
$output = $previousData;
// Fetch JSON data from a file and decode it
function fetchJson($filename) {
return json_decode(file_get_contents($filename), true);
}
// Make an API request and return the JSON response
function makeApiRequest($url) {
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$json = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if ($httpCode == 200) {
return json_decode($json, true);
}
return null;
}
// Get CoinGecko key URL parameter
function getCoinGeckoApiUrl($path, $params = []) {
$secrets = require_once 'secrets.php';
$key = $secrets['coingecko_api_key'];
$demo = $secrets['coingecko_key_is_demo'];
$paramName = $demo ? 'x_cg_demo_api_key' : 'x_cg_pro_api_key';
$baseUrl = $demo ? "https://api.coingecko.com/api/v3/" : "https://pro-api.coingecko.com/api/v3/";
$params[$paramName] = $key;
$url = $baseUrl . $path;
if (!empty($params)) {
$url .= '?' . http_build_query($params);
}
return $url;
}
$currentTime = time();
// Check if five seconds have passed since the last update
if (($currentTime - $previousData['time']) >= 5) {
// Fetch the available currencies from CoinGecko API
$availableCurrenciesApi = "https://api.coingecko.com/api/v3/simple/supported_vs_currencies";
// Fetch list of available currencies from CoinGecko API
// Available currencies are cached for 24 hours
function fetchAvailableCurrencies() {
$cacheFile = 'coingecko-currencies.json';
$cacheTime = 86400;
$currenciesCh = curl_init($availableCurrenciesApi);
curl_setopt($currenciesCh, CURLOPT_RETURNTRANSFER, true);
$availableCurrenciesJson = curl_exec($currenciesCh);
$currenciesHttpCode = curl_getinfo($currenciesCh, CURLINFO_HTTP_CODE);
curl_close($currenciesCh);
if ($currenciesHttpCode == 200) {
$availableCurrencies = json_decode($availableCurrenciesJson, true);
} else {
$availableCurrencies = array_keys($previousData);
unset($availableCurrencies[array_search('time', $availableCurrencies)]);
// Return cached data if it exists and is less than 24 hours old
if (file_exists($cacheFile) && (time() - filemtime($cacheFile) < $cacheTime)) {
return fetchJson($cacheFile);
}
$apiUrl = getCoinGeckoApiUrl('simple/supported_vs_currencies');
$data = makeApiRequest($apiUrl);
if ($data) {
file_put_contents($cacheFile, json_encode($data, JSON_PRETTY_PRINT));
return $data;
}
return null;
}
// Fetch currency data from CoinGecko API
function fetchCurrencyData($currencies) {
$apiUrl = getCoinGeckoApiUrl('simple/price', ['ids' => 'monero', 'vs_currencies' => implode(',', array_map('strtolower', $currencies))]);
return makeApiRequest($apiUrl);
}
$currencyFile = 'coingecko.json';
$originalFile = 'coingecko-original.json';
// Function to process currency data
function processCurrencyData($availableCurrencies, $previousData, $currentTime, $excludedCurrencies) {
// Remove excluded currencies
$availableCurrencies = array_diff($availableCurrencies, $excludedCurrencies);
$currencies = array_map('strtoupper', $availableCurrencies);
// Fetch the latest data from CoinGecko API
$apiUrl = 'https://api.coingecko.com/api/v3/simple/price?ids=monero&vs_currencies=' . implode('%2C', array_map('strtolower', $currencies)) . '&include_market_cap=true&include_24hr_vol=true&include_24hr_change=true&include_last_updated_at=true';
$fetchedData = fetchCurrencyData($currencies);
$ch = curl_init($apiUrl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$json = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
// If the request worked and was not rate-limited
if ($httpCode == 200) {
// Decode the fetched data
$fetchedData = json_decode($json, true);
if ($fetchedData) {
$moneroData = $fetchedData['monero'];
// Initialize new data array
$newData = ['time' => $currentTime];
// Update the data for each currency
foreach ($currencies as $currency) {
$currencyLower = strtolower($currency);
if (isset($moneroData[$currencyLower])) {
$newData[$currencyLower] = [
'lastValue' => $moneroData[$currencyLower],
'lastDate' => $currentTime
];
} else {
$newData[$currencyLower] = [
'lastValue' => $previousData[$currencyLower]['lastValue'] ?? null,
'lastDate' => $previousData[$currencyLower]['lastDate'] ?? null
];
}
$newData[$currencyLower] = [
'lastValue' => $moneroData[$currencyLower] ?? $previousData[$currencyLower]['lastValue'] ?? null,
'lastDate' => $currentTime
];
}
// Save the new data to JSON files
file_put_contents("coingecko.json", json_encode($newData, JSON_PRETTY_PRINT));
file_put_contents("coingecko-original.json", json_encode($moneroData, JSON_PRETTY_PRINT));
$output = $newData;
}
return $newData;
}
return null;
}
$previousData = fetchJson($currencyFile);
$output = $previousData;
// Check if five seconds have passed since the last update
if (($currentTime - $previousData['time']) >= 5) {
$availableCurrencies = fetchAvailableCurrencies();
if ($availableCurrencies !== null) {
$output = processCurrencyData($availableCurrencies, $previousData, $currentTime, $excludedCurrencies);
// Save the data if the API call was successful
if ($output !== null) {
file_put_contents($currencyFile, json_encode($output, JSON_PRETTY_PRINT));
file_put_contents($originalFile, json_encode($output, JSON_PRETTY_PRINT));
}
}
}
// Output the data

5
secrets.dist.php Normal file
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@ -0,0 +1,5 @@
<?php
return [
'coingecko_api_key' => 'CG-xxxx',
'coingecko_key_is_demo' => true,
];