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<?php |
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declare(strict_types=1); |
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namespace PhpLightning\Invoice\Domain\CallbackUrl; |
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use PhpLightning\Http\HttpFacadeInterface; |
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final class CallbackUrl implements CallbackUrlInterface |
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{ |
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/** @var int 100 Minimum in msat (sat/1000) */ |
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public const MIN_SENDABLE = 100_000; |
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/** @var int 10 000 000 Max in msat (sat/1000) */ |
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public const MAX_SENDABLE = 10_000_000_000; |
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private const TAG_PAY_REQUEST = 'payRequest'; |
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public function __construct( |
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private HttpFacadeInterface $httpFacade, |
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private string $lnAddress, |
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private string $callback, |
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) { |
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} |
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public function getCallbackUrl(string $imageFile = ''): array |
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{ |
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// Modify the description if you want to custom it |
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// This will be the description on the wallet that pays your ln address |
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// TODO: Make this customizable from some external configuration file |
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$description = 'Pay to ' . $this->lnAddress; |
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$imageMetadata = $this->generateImageMetadata($imageFile); |
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$metadata = '[["text/plain","' . $description . '"],["text/identifier","' . $this->lnAddress . '"]' . $imageMetadata . ']'; |
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// payRequest json data, spec : https://github.com/lnurl/luds/blob/luds/06.md |
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return [ |
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'callback' => $this->callback, |
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'maxSendable' => self::MAX_SENDABLE, |
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'minSendable' => self::MIN_SENDABLE, |
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'metadata' => $metadata, |
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'tag' => self::TAG_PAY_REQUEST, |
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'commentAllowed' => false, // TODO: Not implemented yet |
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]; |
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} |
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private function generateImageMetadata(string $imageFile): string |
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{ |
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if ($imageFile === '') { |
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return ''; |
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} |
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$response = $this->httpFacade->get($imageFile); |
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if ($response === null) { |
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return ''; |
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} |
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return ',["image/jpeg;base64","' . base64_encode($response) . '"]'; |
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} |
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} |
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php-lightning /
lnaddress
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