我正在使用PHP和curl与json与我的geth服务器进行交互.

除了一件事,我能够做我想要的一切：根据以太坊钱包格式检查用户的输入地址是否有效.

我看到了一个javascript函数here,但我主要使用PHP,我根本不是JS.

任何想法如何验证PHP中的以太坊地址？

解决方法:

这是针对EIP 55规范的以太坊地址验证的PHP实现.有关其工作原理的详细信息,请阅读评论.

<?php

use bb\Sha3\Sha3;

class EthereumValidator
{
    public function isAddress(string $address): bool
    {
        // See: https://github.com/ethereum/web3.js/blob/7935e5f/lib/utils/utils.js#L415
        if ($this->matchesPattern($address)) {
            return $this->isAllSameCaps($address) ?: $this->isValidChecksum($address);
        }

        return false;
    }

    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);
        // See: https://github.com/ethereum/web3.js/blob/b794007/lib/utils/sha3.js#L35
        $hash = Sha3::hash(strtolower($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

要验证校验和地址,我们需要SHA3实现,内置hash()功能尚不支持.您需要在this pure PHP implementation中获取上述规则才能生效.它没有在Packagist上注册,将repo注册为composer VCS repository.

还有一个PHP扩展实现我现在不想找到.