Viewing file:  fiat_to_coin_prices.php (2.7 KB) -rw-r--r--
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<?php
require('../src/Coinpayments.php');
require('../src/keys.php');
/** Scenario: Show fiat currency price next to multiple coin currency prices. Sample output in HTML **/
// Create a new API wrapper instance and call to the rates command.
$cps_api = new CoinpaymentsAPI($private_key, $public_key, 'json');
try {
$rates = $cps_api->GetShortRates();
} catch (Exception $e) {
echo 'Error: ' . $e->getMessage();
exit();
}
if ($rates["error"] == "ok") {
// The ticker of the fiat currency.
$fiat_currency = 'USD';
// Uncomment the following line to see calculation for a fiat currency we do not support.
// $fiat_currency = 'KHR';
// The original fiat price of your product or service in USD.
$fiat_price = 50.00;
// The coin currency tickers to convert the price to from the fiat currency.
// In this case we have Bitcoin, Litecoin and Ripple.
$coin_currencies = ['BTC', 'LTC', 'XRP'];
// Prepare start of sample HTML output
$output = '<table><tbody><tr><td>Currency</td><td>Price</td></tr>';
$output .= '<tr><td>' . $fiat_currency . '</td><td>' . $fiat_price . '</td></tr>';
// Check if the fiat currency is in the rates result then calculate BTC price.
// See supported fiat currencies here: https://www.coinpayments.net/supported-coins-fiat
if (!empty($rates['result'][$fiat_currency])) {
$fiat_to_btc = $rates['result'][$fiat_currency]['rate_btc'];
$price_in_btc = ($fiat_price * $fiat_to_btc);
} else {
/**
* No rate available for that fiat currency. Through manual population of the USD rate
* for your chosen currency, you can still output coin currency prices.
* This example uses the Cambodian Riel (KHR). At the time of this example the exchange rate of
* 1 KHR to 1 USD was 0.000245585 so that is the value we'll use below.
*/
$custom_fiat_to_usd = 0.000245585; // Set only this value.
// Use USD as a baseline BTC rate to determine our custom fiat currency to BTC rate
$usd_to_btc = $rates['result']['USD']['rate_btc'];
$price_in_usd = ($fiat_price * $custom_fiat_to_usd);
$price_in_btc = ($price_in_usd * $usd_to_btc);
}
// Loop through the currency tickers and output the price for each currency
foreach ($coin_currencies as $currency) {
$this_currency_rate_btc = $rates['result'][$currency]['rate_btc'];
$this_currency_price = ($price_in_btc / $this_currency_rate_btc);
$output .= '<tr><td>' . $currency . '</td><td>' . $this_currency_price . '</td></tr>';
}
// Close the sample output HTML and echo it onto the page
$output .= '</tbody></table>';
echo $output;
} else {
echo $rates["error"];
}
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