<?php
use BIP\BIP44; //助记词生成种子，种子生成私钥公钥

var_dump(mnemonic_to('chicken home nothing witness quick credit post crystal omit once arrow digital'));

// 助记词→私钥..
// mnemonic：助记词字符串 空格隔开
// passphrase：BIP39 密码（可选）
// address_index：地址索引
function mnemonic_to($mnemonic, $passphrase = '', $address_index = '0') {
    $seed = hash_pbkdf2("sha512", $mnemonic, 'mnemonic' . $passphrase, 2048, 0, false);
    $DerivationPath = "m/44'/60'/0'/0";  //ETH
    $HDKey          = BIP44::fromMasterSeed($seed)->derive($DerivationPath . "/" . $address_index);
    dump($HDKey);
    $HDKey2 = BIP44::fromMasterSeed($seed)->derive($DerivationPath);
    dump($HDKey2);
    return [
        'privateKey'         => $HDKey->privateKey, //私钥-64字符-bip44第0个    BIP-32 主密钥?
        'publicKeyFull'      => '???', //未压缩公钥-130字符-前缀04+椭圆x坐标(64字符)+椭圆y坐标(64字符)
        'publicKey'          => $HDKey->publicKey, //压缩公钥-66字符-前缀03+x(如果y是奇数)，前缀02+x(如果y是偶数)
        'address'            => phpKeccak256($HDKey->publicKey), //地址-42字符
        'mnemonic'           => $mnemonic, //助记词-12个单词
        'wordsCount'         => count(explode(" ", $mnemonic)), //助记词数
        'entropy'            => BIP39::Words($mnemonic)->entropy, //熵
        'seed'               => $seed, // BIP39 种子
        'derivationPath'     => $DerivationPath, // BIP32 推导路径
        'privateExtendedKey' => $HDKey2->getPrivateExtendedKey(), //BIP32 扩展私钥
        'publicExtendedKey'  => $HDKey2->getPublicExtendedKey(), //BIP32 扩展公钥
        // 压缩公钥与未压缩公钥见   https://www.freesion.com/article/93101100036/
    ];
}