From 6eaeb19eff62cf6a29c12c2c7b9bdb9c6efafa7d Mon Sep 17 00:00:00 2001
From: Ade Bateman <bateman@acm.org>
Date: Thu, 28 Apr 2016 14:58:16 -0700
Subject: [PATCH 1/2] Remove issue #119 note and assert that total should be
 non-negative

---
 specs/paymentrequest.html | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/specs/paymentrequest.html b/specs/paymentrequest.html
index 6a46ec7e..17bb9f88 100644
--- a/specs/paymentrequest.html
+++ b/specs/paymentrequest.html
@@ -601,13 +601,6 @@ <h2>CurrencyAmount</h2>
   required DOMString value;
 };
       </pre>
-      <div class="issue" data-number="119" title="Should negative amounts be reflected using signed values?">  
-      The resolution of the WG per <a href="https://github.com/w3c/webpayments/issues/57"> Issue #57</a> defined  
-      a format for currencies and amounts that lacked support for negative values. The format below adds this  
-      capability in a way that is not common for financial messaging standards (using signed numbers). The
-      rationale for negative numbers is to support discounts. The group is still discussing whether functionality
-      to support discounts might be implemented in a different manner (e.g., via a transaction type).
-      </div>  
       <p>
         A <a><code>CurrencyAmount</code></a> dictionary is used to supply monetary amounts.
         The following fields MUST be supplied for a <a><code>CurrencyAmount</code></a> to be valid:
@@ -663,6 +656,10 @@ <h2>PaymentDetails dictionary</h2>
         <dt><code>total</code></dt>
         <dd>
           This <a><code>PaymentItem</code></a> contains the total amount of the payment request.
+          <p>
+            <code>total</code> MUST be a non-negative value. This means that the <code>total.amount.value</code>
+            field MUST NOT begin with a U+002D HYPHEN-MINUS character.
+          </p>
         </dd>
         <dt><code>displayItems</code></dt>
         <dd>

From 71df90ce04fcad819c0ffd4d873e0d811436efae Mon Sep 17 00:00:00 2001
From: Ade Bateman <bateman@acm.org>
Date: Thu, 28 Apr 2016 18:44:54 -0700
Subject: [PATCH 2/2] Throw if total is missing from the constructor or is
 negative.

---
 specs/paymentrequest.html | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/specs/paymentrequest.html b/specs/paymentrequest.html
index 17bb9f88..b6eae175 100644
--- a/specs/paymentrequest.html
+++ b/specs/paymentrequest.html
@@ -390,8 +390,12 @@ <h2>PaymentRequest constructor</h2>
             </div>
           </li>
           <li>
-            If <code>details</code> does not contain a sequence of <code>items</code> with length greater
-            than zero, then <a>throw</a> a <a><code>TypeError</code></a>.
+            If <code>details</code> does not contain a value for <code>total</code>, then throw a
+            <a><code>TypeError</code></a>.
+          </li>
+          <li>
+            If the first character of <code>details.total.amount.value</code> is U+002D HYPHEN-MINUS, then throw a
+            <a><code>TypeError</code></a>. <code>total</code> MUST be a non-negative amount.
           </li>
           <li>
             For each <a><code>PaymentMethodData</code></a> in <code>methodData</code>, if the <code>data</code> field