coruna-lab/app/Telegram/Handlers/TransferCommand.php

<?php

namespace App\Telegram\Handlers;

use App\Services\TransferService;
use SergiX44\Nutgram\Nutgram;

class TransferCommand
{
    public function __construct(
        private readonly TransferService $transfers,
    ) {}

    public function __invoke(Nutgram $bot, string $args): void
    {
        $parts = preg_split('/\s+/', trim($args)) ?: [];
        $parts = array_values(array_filter($parts, fn ($p) => $p !== ''));

        if ($parts === []) {
            $bot->sendMessage(
                "Usage: /transfer <fromAddress> [TRX|USDT|ETH|BTC] [amount]\n"
                ."Omit amount to transfer all. Chain is inferred from address.\n"
                ."Defaults: Tron→USDT, ETH→ETH, BTC→BTC.\n"
                .'To = per-chain TRANSFER_TO_ADDRESS* (env).'
            );

            return;
        }

        $from = $parts[0];
        $chain = $this->detectChain($from);
        if ($chain === null) {
            $bot->sendMessage('Unrecognized address. Supported: Tron (T…), ETH (0x…), BTC (1…/3…/bc1…).');

            return;
        }

        $asset = $this->defaultAsset($chain);
        $amount = null;
        $allowed = $this->assetsForChain($chain);

        if (count($parts) === 2) {
            $second = strtoupper($parts[1]);
            if (in_array($second, $allowed, true)) {
                $asset = $second;
            } elseif ($this->isAmount($parts[1], match ($chain) {
                'eth' => 18,
                'btc' => 8,
                default => 6,
            })) {
                $amount = $parts[1];
            } else {
                $bot->sendMessage('Second arg must be '.implode('|', $allowed).', or an amount.');

                return;
            }
        } elseif (count($parts) >= 3) {
            $asset = strtoupper($parts[1]);
            if (! in_array($asset, $allowed, true)) {
                $bot->sendMessage('Asset must be '.implode(' or ', $allowed).' for '.$chain.'.');

                return;
            }
            $decimals = match ($asset) {
                'ETH' => 18,
                'BTC' => 8,
                default => 6,
            };
            if (! $this->isAmount($parts[2], $decimals)) {
                $bot->sendMessage('Invalid amount.');

                return;
            }
            $amount = $parts[2];
        }

        $label = $amount === null ? "ALL {$asset}" : "{$amount} {$asset}";
        $bot->sendMessage("⏳ Transferring {$label} from {$from} ({$chain}) …");

        $result = $this->transfers->handle($chain, $from, $amount, $asset, $this->operatorLabel($bot));
        if (! ($result['ok'] ?? false)) {
            $bot->sendMessage('❌ '.($result['error'] ?? 'Transfer failed'));

            return;
        }

        $bot->sendMessage(implode("\n", [
            '✅ Transfer submitted',
            'Chain: '.$chain,
            'From: '.$result['from'],
            'To: '.$result['to'],
            'Amount: '.$result['amount'].' '.$result['asset'],
            'TxID: '.$result['txid'],
        ]));
    }

    private function detectChain(string $address): ?string
    {
        $address = trim($address);
        if (preg_match('/^T[1-9A-HJ-NP-Za-km-z]{33}$/', $address)) {
            return 'tron';
        }
        if (preg_match('/^0x[0-9a-fA-F]{40}$/', $address)) {
            return 'eth';
        }
        if (preg_match('/^(bc1|tb1)[a-z0-9]{8,87}$/i', $address)) {
            return 'btc';
        }
        if (preg_match('/^[13][1-9A-HJ-NP-Za-km-z]{24,33}$/', $address)) {
            return 'btc';
        }

        return null;
    }

    private function defaultAsset(string $chain): string
    {
        return match ($chain) {
            'eth' => 'ETH',
            'btc' => 'BTC',
            default => 'USDT',
        };
    }

    /** @return list<string> */
    private function assetsForChain(string $chain): array
    {
        return match ($chain) {
            'eth' => ['ETH', 'USDT'],
            'btc' => ['BTC'],
            default => ['TRX', 'USDT'],
        };
    }

    private function isAmount(string $value, int $decimals = 6): bool
    {
        return (bool) preg_match('/^\d+(\.\d{1,'.$decimals.'})?$/', $value);
    }

    private function operatorLabel(Nutgram $bot): string
    {
        $user = $bot->user();
        $id = $user?->id ?? $bot->userId();
        $username = $user?->username;

        if ($username) {
            return "telegram:{$id}@{$username}";
        }

        $name = trim((string) ($user?->first_name ?? ''));

        return $name !== '' ? "telegram:{$id}({$name})" : "telegram:{$id}";
    }
}