PaywithTerra Backend PHP Library

PHP library for validating payment transactions on Terra blockchain.

Prerequisites

PHP version 5.6, 7.0, 7.1, 7.2, 7.3, or 7.4
PHP extensions: ext-json, ext-curl

Installation

You can use Composer. Follow the installation instructions if you do not already have composer installed.

composer require paywithterra/php-backend-library

In your PHP script, make sure you include the Composer's autoloader:

require __DIR__ . '/vendor/autoload.php';

Alternatively, when you are not using Composer, you can download the release on GitHub and use library directly:

require __DIR__ . '/src/autoload-legacy.php';

Using the library

Request and validate transaction

// Prepare client (see all options below)
$client = new \PaywithTerra\TerraTxValidator([
    "merchantAddress" => "terra12abcdefg1234512345123451234512345abc",
    "chainId" => "pisco-1",
    "LCD" => "https://pisco-lcd.terra.dev/cosmos/tx/v1beta1/txs/{txHash}",
]);

// Request transaction information from public facade (by txHash)
$client->lookupTx("TynpStpmcovsgsNpqlchimy9cydlc83bwudgrBigShTksrzczfvxnf9q4kkvcek4");

// Check if transaction comply with our requirements (throw exception if not)
$client->assertTx([
    "memo" => '#order-1234',
    "denom" => "uluna",
    "amount" => "280000",
]);

Client options (initialization variants)

Variant 1: Using exact LCD and chainId

$client = new \PaywithTerra\TerraTxValidator([
    "merchantAddress" => "terra12abcdefg1234512345123451234512345abc",
    "chainId" => "pisco-1",
    "LCD" => "https://pisco-lcd.terra.dev/cosmos/tx/v1beta1/txs/{txHash}",
]);

Variant 2: Using exact FCD and chainId

$client = new \PaywithTerra\TerraTxValidator([
    "merchantAddress" => "terra12abcdefg1234512345123451234512345abc",
    "chainId" => "pisco-1",
    "FCD" => "https://pisco-fcd.terra.dev/v1/tx/{txHash}",
]);

Variant 3: Using network name (requests chains info + LCD url from Terra network and cache it)

$client = new \PaywithTerra\TerraTxValidator([
    "merchantAddress" => "terra12abcdefg1234512345123451234512345abc",
    "networkName" => "testnet", // or "mainnet" or "classic"
    "cache" => new \PaywithTerra\Cache\FileCache(),
]);

Assets (denoms) support

Denom code	Asset name / Description
uluna	Luna Default (basic) network asset
ibc/B3504E092456BA618CC28AC671A71FB08C6CA0FD0BE7C8A5B5A3E2DD933CC9E4	axlUSDC (mainnet) The USDC representation in Terra network (can be swapped from Luna right on Station Mobile)
ibc/CBF67A2BCF6CAE343FDF251E510C8E18C361FC02B23430C121116E0811835DEF	axlUSDT (mainnet) The Tether representation in Terra network (can be swapped from Luna right on Station Mobile)

Notes

We don't use any of modern libraries (like Guzzle or Symphony HTTP Client) as transport because we want to keep the minimal supported PHP version as low as possible.
This approach allows even old-school and legacy PHP-projects to connect to Terra. If you really want to use HTTP clients as transport, please open an issue.

License

The MIT License (MIT)