Added convenience method Account::isValidAccount

src/Model/Account.php

@@ -6,6 +6,7 @@
 
 use phpseclib\Math\BigInteger;
 use ZuluCrypto\StellarSdk\Horizon\Api\HorizonResponse;
+use ZuluCrypto\StellarSdk\Keypair;
 use ZuluCrypto\StellarSdk\Transaction\TransactionBuilder;
 use ZuluCrypto\StellarSdk\Util\MathSafety;
 use ZuluCrypto\StellarSdk\XdrModel\Asset;
@@ -86,6 +87,27 @@ public static function fromHorizonResponse(HorizonResponse $response)
         return $object;
     }
 
+    /**
+     * Returns true if the specified account ID (G....) passes basic validity checks
+     *
+     * Note that this doesn't necessarily mean the account is funded or exists
+     * on the network. To check that, use the Server::getAccount() method.
+     *
+     * @param $accountId
+     * @return bool
+     */
+    public static function isValidAccount($accountId)
+    {
+        // Validate that keypair passes checksum
+        try {
+            $keypair = Keypair::newFromPublicKey($accountId);
+        } catch (\Exception $e) {
+            return false;
+        }
+
+        return true;
+    }
+
     public function __construct($id)
     {
         $this->id = $id;

tests/Unit/Model/AccountTest.php

@@ -0,0 +1,19 @@
+<?php
+
+
+namespace ZuluCrypto\StellarSdk\Test\Unit\Model;
+
+
+use PHPUnit\Framework\TestCase;
+use ZuluCrypto\StellarSdk\Model\Account;
+
+class AccountTest extends TestCase
+{
+    public function testIsValidAccount()
+    {
+        $this->assertTrue(Account::isValidAccount('GDRXE2BQUC3AZNPVFSCEZ76NJ3WWL25FYFK6RGZGIEKWE4SOOHSUJUJ6'));
+
+        $this->assertFalse(Account::isValidAccount(null));
+        $this->assertFalse(Account::isValidAccount('G123'));
+    }
+}