<?php

namespace blockchain\web3;


define('ABI_BEP721', file_get_contents('bep721.json'));

class Bep721 extends SmartContract
{
    function __construct($client, $credential, $address)
    {
        parent::__construct($client, $credential, ABI_BEP721);
        $this->at($address);
    }

    function getTransferEvents($from = [], $to = [], $fromBlock = 'latest', $toBlock = 'latest')
    {
        $toTopic = function ($addr) {
            $addr = preg_replace('/^0x/', '', $addr);
            return '0x' . str_pad($addr, 64, '0', STR_PAD_LEFT);
        };
        $from = array_map($toTopic, $from);
        $to = array_map($toTopic, $to);
        return $this->queryEvents([EVENTSIG_TRANSFER, $from, $to], $fromBlock, $toBlock);
    }

    function getBlockNumber()
    {
        $cb = new Callback();
        $this->eth->blockNumber($cb);
        return $cb->result->toString();
    }

    function getTransactionReceipt($tx_hash)
    {
        $cb = new Callback();
        $this->eth->getTransactionReceipt($tx_hash, $cb);
        return $cb->result;
    }
}