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Overview

This guide introduces Cobo WaaS API in PHP SDK, enabling developers to integrate with Cobo’s Custodial/MPC services seamlessly using the PHP programming language.

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Before You Begin

  • Ensure that you have created an account and configured Cobo’s Custodial/MPC services. For detailed instructions, please refer to the Quickstart guide.

  • To access the API documentation, navigate to the API references section.

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Using the Cobo PHP SDK

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GitHub

The Official PHP SDK for Cobo WaaS API.

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Requirements

PHP 7.0 or newer.

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Installation

The cobo_custody library can be conveniently installed using Composer.

  • first you need to install Composer

  • then add dependency in composer.json

{
  "require": {
    "cobo/cobo_custody": "0.2.17"
  }
}

​
Code Sample

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Generate Key Pair

<?php
require 'vendor/autoload.php';

use Cobo\Custody\Config;
use Cobo\Custody\LocalSigner;
use Cobo\Custody\Client;
$key = LocalSigner::generateKeyPair();
echo "apiSecret:", $key['apiSecret'],"\n";
echo "apiKey:", $key['apiKey'];
?>

For more information on the API key, please click here.

​
Initialize ApiSigner

ApiSigner can be instantiated through $signer = new LocalSigner($key['apiSecret']);

$signer = new LocalSigner($key['apiSecret']);

In certain scenarios, the private key may be restricted from export, such as when it is stored in AWS Key Management Service (KMS). In such cases, please pass in a custom implementation using the ApiSigner interface:

​
Initialize RestClient

<?php
require 'vendor/autoload.php';

use Cobo\Custody\Config;
use Cobo\Custody\LocalSigner;
use Cobo\Custody\Client;

$client = new Client($signer, Config::DEV, false);
?>

​
Custodial Wallet Sample

<?php
require 'vendor/autoload.php';

use Cobo\Custody\Config;
use Cobo\Custody\LocalSigner;
use Cobo\Custody\Client;

$key = LocalSigner::generateKeyPair();
echo "apiSecret:", $key['apiSecret'],"\n";
echo "apiKey:", $key['apiKey'];

$signer = new LocalSigner($key['apiSecret']);
$client = new Client($signer, Config::DEV, false);
$res = $client->getAccountInfo();

?>

​
MPC Wallet Sample

<?php
require 'vendor/autoload.php';
use Cobo\Custody\Config;
use Cobo\Custody\LocalSigner;
use Cobo\Custody\MPCClient;
$key = LocalSigner::generateKeyPair();
echo "apiSecret:", $key['apiSecret'],"\n";
echo "apiKey:", $key['apiKey'];

$signer = new LocalSigner($apiKey);
$mpc_client = new MPCClient($signer, Config::DEV, false);
$res = $mpc_client->getSupportedChains();
var_dump($res->success);
var_dump(json_encode($res));
?>

​
Handling Response

<?php
require 'vendor/autoload.php';
use Cobo\Custody\Config;
use Cobo\Custody\LocalSigner;
use Cobo\Custody\Client;
$key = LocalSigner::generateKeyPair();
echo "apiSecret:", $key['apiSecret'],"\n";
echo "apiKey:", $key['apiKey'];

$signer = new LocalSigner($apiKey);
$client = new Client($signer, Config::DEV, false);
$res = $client->getCoinDetails();

/* response as follows:
object(stdClass)#5 (2) {
  ["success"]=>
  bool(true)
  ["result"]=>
  object(stdClass)#1750 (16) {
    ["coin"]=>
    string(3) "BTC"
    ["display_code"]=>
    string(3) "BTC"
    ["description"]=>
    string(7) "Bitcoin"
    ["decimal"]=>
    int(8)
    ["can_deposit"]=>
    bool(true)
    ["can_withdraw"]=>
    bool(true)
    ["require_memo"]=>
    bool(false)
    ["minimum_deposit_threshold"]=>
    string(5) "10000"
    ["balance"]=>
    string(5) "10000"
    ["abs_balance"]=>
    string(6) "0.0001"
    ["fee_coin"]=>
    string(3) "BTC"
    ["abs_estimate_fee"]=>
    string(8) "0.000948"
    ["abs_estimate_fee_usd"]=>
    string(5) "35.64"
    ["confirming_threshold"]=>
    int(4)
    ["dust_threshold"]=>
    int(546)
    ["token_address"]=>
    string(0) ""
  }
}
*/

// You can handle the response object as follows:
var_dump($res->success);
var_dump($res->result->coin);
var_dump($res->result->abs_estimate_fee_usd);
var_dump(json_encode($res));
?>

​
Handling API Errors

<?php
require 'vendor/autoload.php';
use Cobo\Custody\Config;
use Cobo\Custody\LocalSigner;
use Cobo\Custody\Client;

$signer = new LocalSigner("wrong secret key");
$client = new Client($signer, Config::DEV, false);
$res = $client->getCoinDetails();

/* response
"
object(stdClass)#5 (5) {
  ["success"]=>bool(false)
  ["error_code"]=>int(1006)
  ["error_message"]=>string(51) "Invalid api key, please use standard wallet api key"
  ["error_id"]=>string(32) "110e3bd3e8064f99ae0c0fea9e91bdb9"
  ["error_description"]=>string(51) "Invalid api key, please use standard wallet api key"
}
*/

// You can handle the error response  as follows:
var_dump($res->error_code);
var_dump($res->error_message);
var_dump($res->error_id);
var_dump($res->error_description);
?>
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