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php - 如何验证以太坊地址 PHP/Laravel?

转载 作者:行者123 更新时间:2023-12-04 03:10:18 27 4
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如何检查 Laravel 输入的以太坊地址格式是否有效?

最佳答案

这是一个 Laravel custom validation rule用于根据 EIP 55 验证以太坊地址规范。有关其工作原理的详细信息,请阅读评论。

<?php

namespace App\Rules;

use kornrunner\Keccak; // composer require greensea/keccak
use Illuminate\Contracts\Validation\Rule;

class ValidEthereumAddress implements Rule
{
/**
* @var Keccak
*/
protected $hasher;

public function __construct(Keccak $hasher)
{
$this->keccak = $hasher;
}

public function passes($attribute, $value)
{
// See: https://github.com/ethereum/web3.js/blob/7935e5f/lib/utils/utils.js#L415
if ($this->matchesPattern($value)) {
return $this->isAllSameCaps($value) ?: $this->isValidChecksum($value);
}

return false;
}

public function message()
{
return 'The :attribute must be a valid Ethereum address.';
}

protected function matchesPattern(string $address): int
{
return preg_match('/^(0x)?[0-9a-f]{40}$/i', $address);
}

protected function isAllSameCaps(string $address): bool
{
return preg_match('/^(0x)?[0-9a-f]{40}$/', $address) || preg_match('/^(0x)?[0-9A-F]{40}$/', $address);
}

protected function isValidChecksum($address)
{
$address = str_replace('0x', '', $address);
$hash = $this->keccak->hash(strtolower($address), 256);

// See: https://github.com/web3j/web3j/pull/134/files#diff-db8702981afff54d3de6a913f13b7be4R42
for ($i = 0; $i < 40; $i++ ) {
if (ctype_alpha($address{$i})) {
// Each uppercase letter should correlate with a first bit of 1 in the hash char with the same index,
// and each lowercase letter with a 0 bit.
$charInt = intval($hash{$i}, 16);

if ((ctype_upper($address{$i}) && $charInt <= 7) || (ctype_lower($address{$i}) && $charInt > 7)) {
return false;
}
}
}

return true;
}
}

依赖

为了验证校验和地址,我们需要一个 Keccac内置 hash() 不支持的实现功能。您需要要求 this pure PHP implementation使上述规则生效。

关于php - 如何验证以太坊地址 PHP/Laravel?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45874634/

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