Pashaster12 / laravel-crypto-stats

src/Connectors/EtherscanConnector.php

<?php

namespace LaravelCryptoStats\Connectors;

use Exception;
use LaravelCryptoStats\Services\EthereumValidator;

class EtherscanConnector extends AbstractConnector
{
    public $supported_currencies = ['ETH'];
    protected $api_url_prefix = 'https://api.etherscan.io/api?';
    protected $api_description = 'https://etherscan.io/apis';
    protected $block_link_prefix = 'https://etherscan.io/address/';

    public function validateAddress(string $address): bool
    {
        if ($address) {
            return EthereumValidator::isAddress($address);
        }

        throw new Exception('Wallet address can not be empty!');
    }

    public function getBalance(string $address): float
    {
        if ($address) {
            $url = $this->api_url_prefix.'module=account&action=balance&address='.$address.'&tag=latest&apikey='.$this->config['etherscan_api_key'];
            $response = $this->apiCall($url);

            if (is_numeric($response)) {
                $balance = $this->convertFromWei($response);

                return $this->roundBalance($balance);

$balance of type double is incompatible with the type LaravelCryptoStats\Connectors\type expected by parameter $balance of LaravelCryptoStats\Connectors\AbstractConnector::roundBalance().

            } else {
                throw new Exception($response);
            }
        }

        throw new Exception('Wallet address can not be empty!');
    }

    public function getBlockExplorerLink(string $address): string
    {
        if ($address) {
            return $this->block_link_prefix.$address;
        }

        throw new Exception('Wallet address can not be empty!');
    }

    protected function apiCall(string $url)
    {
        $response = $this->sendApiRequest($url);
        if ($response && isset($response['status']) && isset($response['result'])) {
            return $response['result'];
        }

        throw new Exception('Output data is not correct. Check the API description - '.$this->api_description.'!');
    }

    /**
     * Convert balance of the ETH wallet from the Wei points to the float.
     *
     * @param int $balance
     *
     * @return float
     */
    private function convertFromWei($balance): float
    {
        return $balance / pow(10, 18);
    }
}