It is correct, you can send transactions to STEEM/GOLOS blockchain on PHP!

php-graphene-node-client

It is PHP API client for STEEM/GOLOS blockchain

Github or packagist with MIT license. Author @t3ran13 and active helper @semaspring

In Release v3.0.0

• broadcast (example for vote)
• tools for broadcast
• bag fixes for broadcast commands

Install Via Composer

For readonly, without broadcast

composer require t3ran13/php-graphene-node-client

with broadcast (sending transactions to blockchain)

(details and dockerfile here)

install components

• automake
• libtool
• libgmp-dev

install extensions

• secp256k1 / how to install https://github.com/Bit-Wasp/secp256k1-php
• gmp

broadcast_api operations templates

• vote

<?php

use GrapheneNodeClient\Tools\ChainOperations\OpVote;
use GrapheneNodeClient\Tools\Transaction;

$answer = OpVote::doSynchronous(
    Transaction::CHAIN_STEEM, //Transaction::CHAIN_GOLOS
    'guest123',
    '5JRaypasxMx1L97ZUX7YuC5Psb5EAbF821kkAGtBj7xCJFQcbLg',
    'firepower',
    'steemit-veni-vidi-vici-steemfest-2016-together-we-made-it-happen-thank-you-steemians',
    10000
);

// example of answer
//Array
//(
//    [id] => 5
//    [result] => Array
//        (
//            [id] => a2c52988ea870e446480782ff046994de2666e0d
//            [block_num] => 17852337
//            [trx_num] => 1
//            [expired] =>
//        )
//
//)

##Tools: Transaction for blockchain (broadcast)

<?php

use GrapheneNodeClient\Tools\Transaction;

/** @var CommandQueryData $tx */
$tx = Transaction::init($chainName);
$tx->setParamByKey(
    '0:operations:0',
    [
        'vote',
        [
            'voter'    => $voter,
            'author'   => $author,
            'permlink' => $permlink,
            'weight'   => $weight
        ]
    ]
);

if (Transaction::CHAIN_GOLOS === $chainName) {
    $connector = new GolosWSConnector();
} elseif (Transaction::CHAIN_STEEM === $chainName) {
    $connector = new SteemitWSConnector();
}
$command = new BroadcastTransactionSynchronousCommand($connector);
Transaction::sign($chainName, $tx, ['posting' => $publicWif]);

$answer = $command->execute(
    $tx
);

WARNING

Transactions are signing with spec256k1-php with function secp256k1_ecdsa_sign_recoverable($context, $signatureRec, $msg32, $privateKey) and if it is not canonical from first time, you have to make transaction for other block. For searching canonical sign function have to implement two more parameters, but spec256k1-php library does not have it.

---

It is better with each commit

Commits were done by me for release v3.0.0

• serializer for vote operation
• partly PrivateKeyFromWif
• PrivateKeyFromWif
• signature is not canonical
• Missing Posting Authority
• 3030000 tx_missing_posting_auth: missing required posting authority
• OperationSerializer.php code review
• serealizer is ok
• code review
• checking signature is canonical with DER
• checks
• Auth.php: some echo for data
• code review
• sing done
• SteemitWSConnector.php upd
• change ByteBuffer
• code review
• README.md upd
• sing for steem (bug fix)
• README.md upd
• Merge branch 'master' into dev-auth
• README.md upd

---

Posted on Utopian.io - Rewarding Open Source Contributors

---