title: Braintree in multi-currency
body: <p>I'm trying to integrate Braintree into my website to accept payments and I have a couple of questions regarding the multi-currency support. <br>
  First let me say that I have created an account that accepts <strong>EUR</strong>, since I live in the EU.</p>
  
  <p>Now, let's say that an american guy wants to buy something on my webapp. He obviously has a credit card tied to a <strong>USD</strong> bank account. Reading the doc I found that in Braintree I <strong>cannot</strong> specify the currency, hence my amount, in this case <code>10</code>, is 10 EUR</p>
  
  <pre><code>gateway.transaction.sale({
          amount: 10,
          paymentMethodNonce: nonceFromTheClient,
          options: {
              submitForSettlement: true
          }
      })
  </code></pre>
  
  <p>Which means that on my website I'll have to display</p>
  
  <pre><code>Would you like to buy this item for 11.16 USD?
  </code></pre>
  
  <p>where 11.16 is the current conversion rate (at the time of writing). <br></p>
  
  <p>Is this the right way to do this?? <strong>I am skeptical</strong> for 2 reasons:</p>
  
  <ul>
  <li>Say I use an online real-time converter >> if the user refreshes the page he may find a different amount (<strong>BAD UX</strong>)</li>
  <li>Say I set a fixed conversion rate, e.g. 1 EUR == 1.1 USD >> the user will find a different amount charged on his card wrt to the one displayed in the website. This is because I actually charge 10 EUR not 11 USD as advertise (<strong>BAD UX</strong>)</li>
  </ul>
  
  <p>Can you please help me understand <strong>the correct way</strong> to handle this?? <br></p>
  
  <p>Every time I bought something from a foreign website I got the conversion displayed in EUR and I've been charged with the exact amount, but here on Braintree I don't understand how to do it.</p>
  
  <p>Thanks in advance</p>