TestEthContract.php

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<?php
namespace Ethereum;

use Ethereum\TestStatic;
use Exception;

abstract class TestEthContract extends TestEthClient {

    protected $data;
    protected $contract;

    protected function setUp()
    {
        $contractName = (new \ReflectionClass($this))->getShortName();
        $fileName = getcwd() . '/tests/TestEthClient/test_contracts/build/contracts/' . $contractName . '.json';

        if (!file_exists($fileName)) {
            throw new Exception(
                'You need to compile and deploy the smartcontracts located in TestEthClient/test_contracts/contracts using truffle.'
                . ' (npm -i -g truffle && truffle compile && truffle migrate)'
            );
        }

        $this->data = json_decode(file_get_contents($fileName));
        $this->contract = new SmartContract(
            $this->data->abi,
            $this->data->networks->{NETWORK_ID}->address,
            new Ethereum(SERVER_URL)
        );
    }
}