Cache the bitcoin block height

app/Console/Commands/CacheBitcoinBlockHeightCommand.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Console\Commands;
+
+use Illuminate\Console\Command;
+use Illuminate\Support\Collection;
+use App\Jobs\CacheBitcoinBlockHeight;
+use Illuminate\Support\Facades\Cache;
+
+class CacheBitcoinBlockHeightCommand extends Command
+{
+    protected $signature = 'bitcoin:cache-height';
+
+    protected $description = 'Cache the Bitcoin block height';
+
+    public function handle()
+    {
+        CacheBitcoinBlockHeight::dispatchSync();
+
+        $height = Collection::make(
+            Cache::get('bitcoin_block_height', default: [])
+        )
+            ->get('height', default: 'unknown');
+
+        $this->info('The current Bitcoin block height is '.$height);
+    }
+}

app/Jobs/CacheBitcoinBlockHeight.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Jobs;
+
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Foundation\Queue\Queueable;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Facades\Http;
+use Illuminate\Support\Str;
+
+class CacheBitcoinBlockHeight implements ShouldQueue
+{
+    use Queueable;
+
+    protected string $apiUrl;
+
+    public function __construct()
+    {
+        $this->apiUrl = Str::of(config('services.blockcypher.base_url'))
+            ->append('btc/main')
+            ->toString();
+    }
+
+    public function handle(): void
+    {
+        $response = Http::acceptJson()
+            ->get($this->apiUrl);
+
+        if ($response->successful()) {
+            Cache::put('bitcoin_block_height', $response->json());
+        }
+    }
+}

config/services.php

@@ -43,6 +43,10 @@
         'site_id' => env('FATHOM_SITE_ID'),
     ],
 
+    'blockcypher' => [
+        'base_url' => 'https://api.blockcypher.com/v1/',
+    ],
+
     'coinmarketcap' => [
         'base_url' => 'https://pro-api.coinmarketcap.com/v1/',
         'api_key' => env('COIN_MARKET_CAP_API_KEY'),

tests/Unit/Jobs/CacheBitcoinBlockHeightTest.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Tests\Unit\Jobs;
+
+use Tests\TestCase;
+use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\Http;
+use App\Jobs\CacheBitcoinBlockHeight;
+use Illuminate\Support\Facades\Cache;
+use PHPUnit\Framework\Attributes\Test;
+
+class CacheBitcoinBlockHeightTest extends TestCase
+{
+    #[Test]
+    public function it_caches_the_bitcoin_block_height(): void
+    {
+        Http::fake([
+            'api.blockcypher.com/*' => Http::response([
+                'name' => 'BTC.main',
+                'height' => 123456,
+            ], 200),
+        ]);
+
+        CacheBitcoinBlockHeight::dispatch();
+
+        $this->assertTrue(Cache::has('bitcoin_block_height'));
+        $this->assertEquals(123456, Collection::make(
+            Cache::get('bitcoin_block_height'))->get('height')
+        );
+    }
+}