feat: add json rpc handling (#114)

Author: alfonsobries

src/API/EVM.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ArkEcosystem\Client\API;
+
+class EVM extends AbstractAPI
+{
+    /**
+     * Make an eth_call POST request to retrieve data from a contract.
+     *
+     * @param array $payload
+     *
+     * @return array|null
+     */
+    public function ethCall(array $payload): ?array
+    {
+        $body = [
+            'jsonrpc' => '2.0',
+            'method'  => 'eth_call',
+            'params'  => [$payload, 'latest'],
+            'id'      => null,
+        ];
+
+        $headers = [
+            'Content-Type' => 'application/json',
+        ];
+
+        return $this->withApi('evm')->post('api/', $body, $headers);
+    }
+}

src/ArkClient.php

@@ -128,7 +128,8 @@ public function getHosts(): array
      */
     public function api(string $name): API\AbstractAPI
     {
-        $name  = ucfirst($name);
+        $name  = $name === 'evm' ? 'EVM' : ucfirst($name);
+
         $class = "ArkEcosystem\\Client\\API\\{$name}";
 
         if (! class_exists($class)) {

tests/API/EVMTest.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ArkEcosystem\Tests\Client\API;
+
+use ArkEcosystem\Tests\Client\TestCase;
+
+/**
+ * @covers \ArkEcosystem\Client\API\EVM
+ */
+class EVMTest extends TestCase
+{
+    /** @test */
+    public function eth_call_calls_correct_url()
+    {
+        $this->assertResponse(
+            method: 'POST',
+            path: 'api/',
+            callback: function ($client) {
+                return $client->evm()->ethCall([
+                    'from' => '0x1234567890abcdef',
+                    'to'   => '0xfedcba0987654321',
+                    'data' => '0xabcdef',
+                ]);
+            },
+            expectedApi: 'evm'
+        );
+    }
+}