chore(examples): update examples to use ETH-sepolia-sepolia instead of USDC-sepolia

Author: marcohefti

README.md

@@ -32,7 +32,7 @@ $client = RequestClient::create([
 $request = $client->requests()->create([
     'amount' => '100',
     'invoiceCurrency' => 'USD',
-    'paymentCurrency' => 'USDC-sepolia',
+    'paymentCurrency' => 'ETH-sepolia-sepolia',
     'payee' => '0x0000000000000000000000000000000000000000',
     'reference' => 'order-123',
 ]);

docs/BEFORE-AFTER.md

@@ -25,7 +25,7 @@ try {
         'json' => [
             'amount' => '1250',
             'invoiceCurrency' => 'USD',
-            'paymentCurrency' => 'USDC-sepolia',
+            'paymentCurrency' => 'ETH-sepolia-sepolia',
             'payee' => '0xpayee',
             'reference' => 'order-123',
         ],
@@ -61,7 +61,7 @@ $client = RequestClient::create([
 $request = $client->requests()->create([
     'amount' => '1250',
     'invoiceCurrency' => 'USD',
-    'paymentCurrency' => 'USDC-sepolia',
+    'paymentCurrency' => 'ETH-sepolia-sepolia',
     'payee' => '0xpayee',
     'reference' => 'order-123',
 ]);

docs/TROUBLESHOOTING.md

@@ -273,7 +273,7 @@ errors: [{"path": "/amount", "message": "Value is required"}]
    $request = $client->requests()->create([
        'amount' => '100',              // Required
        'invoiceCurrency' => 'USD',     // Required
-       'paymentCurrency' => 'USDC-sepolia',  // Required
+       'paymentCurrency' => 'ETH-sepolia-sepolia',  // Required
        'payee' => '0x...',             // Required
        'reference' => 'order-123',     // Recommended
    ]);

tests/Unit/Domains/Currencies/V2/CurrenciesV2ApiTest.php

@@ -20,14 +20,14 @@ public function testListCurrencies(): void
     {
         $api = $this->apiWithResponses([new Response(200, ['content-type' => 'application/json'], json_encode([
             [
-                'id' => 'USDC-sepolia',
+                'id' => 'ETH-sepolia-sepolia',
                 'symbol' => 'USDC',
             ],
         ], JSON_THROW_ON_ERROR))], $adapter);
 
         $tokens = $api->list(['network' => 'sepolia']);
 
-        self::assertSame('USDC-sepolia', $tokens[0]['id'] ?? null);
+        self::assertSame('ETH-sepolia-sepolia', $tokens[0]['id'] ?? null);
         $path = parse_url($adapter->lastRequest?->url() ?? '', PHP_URL_PATH);
         self::assertSame('/v2/currencies', $path);