This is something that I plan to implement in the future.

The exchange could present an exchange rates provider to the parent plugin.

Other than that, you can get the last market price with the wallets_api_market_summary filter.

See the accompanying phpdoc for an example of how to call it.

Thank you for sharing your code. This is indeed how you would use the exchange’s PHP API to pull the minimum bid and maximum ask prices for a market. You can also have access to the latest price exchanged with $market_summary->last_price.

Once quick comment, you are checking for if ($ask == " ") {. This might work, but to be safe, I would write if ( ! $ask ) {. You are not interested in whether $ask is empty but whether it is truthy or falsy. (See http://php.net/manual/en/language.types.boolean.php)

kind regards

Nice bit of code 🙂
Have adapted it into a shortcode on my site and works great to display anywhere on the site where the price is needed. 🙂

Work In Progress, just taken your idea and suggestion by Alex and wrapped into a plugin.
Save into file called showcoinlastprice.php put into a folder called showcoinlastprice and zip it, then install just like you do any other plugin.
Use shortcode where ever you want last price for your coin to be shown.

<?php
/*
Plugin Name:  Show Coin Last Price
Plugin URI:   https://www.africawebsolutions.org
Description:  Show Primary Coin Last Price
Version:      Ver 0.001
Author:       Megan Wasson
Author URI:   https://www.africawebsolutions.org
License:      GPL2
License URI:  https://www.gnu.org/licenses/gpl-2.0.html
Text Domain:  showcoinlastprice

showcoinlastprice is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
any later version.
 
showcoinlastprice is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with showcoinlastprice. If not, see https://www.gnu.org/licenses/gpl-2.0.html.
*/
// Use ShortCode [showCOINBTCPrice] where ever you want your coins last price to show.

function showCOINBTCPrice_shortcode($atts = [], $coinlastprice = null)
{
     $market_summary = apply_filters(
     'wallets_api_market_summary',
     null,
     array(
         'base_symbol' => 'BTC',  //  < -----  change to your Base Coin Symbol info here
         'quote_symbol' => 'COIN',  //  < -----  change to your Coin Symbol info here
     )
 );

$coinlastprice = $market_summary->last_price;
    // always return
    return $coinlastprice;
}
add_shortcode('showCOINBTCPrice', 'showCOINBTCPrice_shortcode');