From d77fc883d1272b3f0cf8f0578c74e6fc752f9535 Mon Sep 17 00:00:00 2001
From: Alex Grintsvayg <grin@lbry.io>
Date: Tue, 23 May 2017 13:07:02 -0400
Subject: [PATCH] only try to claim reward for initial claims, not updates

---
 app/main.js      |  3 ---
 ui/js/rewards.js | 55 ++++++++++++++++++++++++++++++++++++++++++++++--
 ui/package.json  |  1 +
 3 files changed, 54 insertions(+), 5 deletions(-)

diff --git a/app/main.js b/app/main.js
index e6125c23e..e9f4e5c36 100644
--- a/app/main.js
+++ b/app/main.js
@@ -73,7 +73,6 @@ function checkForNewVersion(callback) {
       result += data;
     });
     res.on('end', () => {
-      console.log('Local version:', localVersion);
       const tagName = JSON.parse(result).tag_name;
       const [_, remoteVersion] = tagName.match(/^v([\d.]+(?:-?rc\d+)?)$/);
       if (!remoteVersion) {
@@ -82,9 +81,7 @@ function checkForNewVersion(callback) {
           win.webContents.send('version-info-received', null);
         }
       } else {
-        console.log('Remote version:', remoteVersion);
         const upgradeAvailable = semver.gt(formatRc(remoteVersion), formatRc(localVersion));
-        console.log(upgradeAvailable ? 'Upgrade available' : 'No upgrade available');
         if (win) {
           win.webContents.send('version-info-received', {remoteVersion, localVersion, upgradeAvailable});
         }
diff --git a/ui/js/rewards.js b/ui/js/rewards.js
index eae27eb88..caa8bdf31 100644
--- a/ui/js/rewards.js
+++ b/ui/js/rewards.js
@@ -1,3 +1,4 @@
+const hashes = require('jshashes');
 import lbry from 'lbry';
 import lbryio from 'lbryio';
 import {
@@ -16,6 +17,56 @@ function rewardMessage(type, amount) {
   }[type];
 }
 
+function toHex(s) {
+  let h = ''
+  for (var i = 0; i < s.length; i++)
+  {
+    let c = s.charCodeAt(i).toString(16);
+    if (c.length < 2)
+    {
+      c = "0".concat(c);
+    }
+    h += c;
+  }
+  return h;
+}
+
+function fromHex(h) {
+  let s = ''
+  for (let i = 0; i < h.length; i += 2)
+  {
+    s += String.fromCharCode(parseInt(h.substr(i, 2), 16))
+  }
+  return s;
+}
+
+function reverseString(s) {
+  let o = '';
+  for (let i = s.length - 1; i >= 0; i--)
+  {
+    o += s[i];
+  }
+  return o;
+}
+
+function pack(num) {
+  return "" +
+    String.fromCharCode((num      ) & 0xFF) +
+    String.fromCharCode((num >>  8) & 0xFF) +
+    String.fromCharCode((num >> 16) & 0xFF) +
+    String.fromCharCode((num >> 24) & 0xFF);
+}
+
+// Returns true if claim is an initial claim, false if it's an update to an existing claim
+function isInitialClaim(claim) {
+  const reversed = reverseString(fromHex(claim.txid))
+  const concat = reversed.concat(pack(claim.nout))
+  const sha256 = (new hashes.SHA256({utf8: false})).raw(concat)
+  const ripemd160 = (new hashes.RMD160({utf8: false})).raw(sha256)
+  const hash = toHex(reverseString(ripemd160));
+  return hash == claim.claim_id;
+}
+
 const rewards = {};
 
 rewards.TYPE_NEW_DEVELOPER = "new_developer",
@@ -68,7 +119,7 @@ rewards.claimReward = function (type) {
         case rewards.TYPE_FIRST_CHANNEL:
           lbry.claim_list_mine().then(function(claims) {
             let claim = claims.find(function(claim) {
-              return claim.name.length && claim.name[0] == '@' && claim.txid.length
+              return claim.name.length && claim.name[0] == '@' && claim.txid.length && isInitialClaim(claim)
             })
             if (claim) {
               params.transaction_id = claim.txid;
@@ -82,7 +133,7 @@ rewards.claimReward = function (type) {
         case rewards.TYPE_FIRST_PUBLISH:
           lbry.claim_list_mine().then((claims) => {
             let claim = claims.find(function(claim) {
-              return claim.name.length && claim.name[0] != '@' && claim.txid.length
+              return claim.name.length && claim.name[0] != '@' && claim.txid.length && isInitialClaim(claim)
             })
             if (claim) {
               params.transaction_id = claim.txid
diff --git a/ui/package.json b/ui/package.json
index 6245fcd89..1cf1f5057 100644
--- a/ui/package.json
+++ b/ui/package.json
@@ -22,6 +22,7 @@
     "babel-cli": "^6.11.4",
     "babel-preset-es2015": "^6.13.2",
     "babel-preset-react": "^6.11.1",
+    "jshashes": "^1.0.6",
     "node-sass": "^3.8.0",
     "plyr": "^2.0.12",
     "rc-progress": "^2.0.6",