Actually, now I have 2 question/comments regarding the "request coins" function:
1) Is it possible to send the QR code with the request? I couldn't do it, but this would be nice to be able to scan an email request with the phone.
2) When I test the request coins function, the message adds a ? to the QRK address...also if I "include label" with the request, it looks like this:
amount=40&label+coinmama%20QRK...Its a bit hard to decipher.. also the request was for 40 QRK, not 20QRK
Right now, I don't believe it is possible to send an email with a QR code. Instead it is sending the Quark URI. An example is here: quark:QLtLcRLMCshyFisUR2e3YSSqwbR4DjdT46?amount=40&label=Hash%20Engineering This should be readable by a Quark Client and I just activated this feature in the Quark Wallet. If one were to click on this as a link from a browser on the phone, it would activate the App. Not sure about other apps understanding this URI as a link. quark:QLtLcRLMCshyFisUR2e3YSSqwbR4DjdT46?amount=40&label=Hash%20Engineering <-- this is a link In your example, the amount was 40, but your label was "coinmama QRK", which is translated as "coinmama%20QRK" The %20 represents a space ' ' in a URI, which should not contain spaces. Basically this request is not meant to be readable by people so much as usable by another Quark program that can read it and do something with it. |
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Some things I noticed: 1- When you empty your app wallet and for example 500mQRK is available, you can only send 499mQRK. It seems that there should be minimal 1 mQRK left on your app which is not visible anymore. 2- It would be nice if there is a button that you can select that QRK only synchronize when it is connected to WiFi. 3- The exchange rate is not working for my App. 4- You can turn off the background synchronization now, but it is not easy to do. Can there be just a "turn off" button, which close the QRK app completely without background running? The feature I don't understand is "request QRK". Can that be explained? To my opinion it is a strange request  1- The app does add a 0.00010 QRK transaction fee to each amount of coins that is sent. Therefore, if you empty your wallet, the recipient will get the entire amount less the transaction fee. With the desktop client, it is possible to send some coins for free, if certain rules are met. However, it is not possible for the app to know all the information to see if a transaction can be free. The transaction fees go to the miners. 2- I will look into a Wifi only sync feature. 3- Not sure why the exchange rates are not working. The app uses Cryptsy then BTER to get the information. 4. The best way to turn off background sync is to press the back button (from some testing that I have done. It may not work in all cases). |
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Is the source code available?
As written above: No scam possible: The software is written in Java, this means you can decompile the jar file (Google is your friend) and look at the source for yourself!
Thank you for your answer. The .jar was decompiled and over 92,000 class files were found that were labeled as a, b, c, d ... ZZ. There is no way anyone can understand obsfucated code (from the linux version). As a Java developer myself for Android Wallets of various crypto-currencies, I publish all the associated source code on my GitHub account as soon as any new or updated app is released to the public. Granted most cannot make heads or tails of it, but some can. Once there was another dev who published some of the source code to GitHub for a lite wallet. The code still had feathercoin's difficulty adjustment algorithm! Since this app does charge a 0.15% fee on sent transactions, a purely open source solution would allow people such as myself to comment out that line of code and let the miners take it as part of their transaction fees. |
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Many are asking for Android Apps for new or older coins that use the Kimoto Gravity Well. This difficulty adjustment may work wonders for halting the strip mining of multipools, but it is not good for Android device battery long longevity or for sync speed with the blockchain.
There are three parts of the KGW code. The first part is the rewind (retrieving the previous block header), the second is difficulty calculation math with 256 bit integers and the last is some floating point math for other calculations. These three parts are part of a loop that repeats a certain number of times for each block. About half of the time involved in calculating the difficulty is retrieving the previous block information. Sometimes Megacoin needs to do this between 144 and 4000 times for each block. About 40% of the time is doing a subtraction, a division and an addition using 256 bit integers (Java BigInteger is slow). Lastly, the remaining 10% of the time is doing some floating point math.
Currently, we are looking into getting the 256bit integer math handled Natively (machine code) instead of interpreted Java. Next will the the stepping back through the block chain.
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Hash, how do we get better peers? Is there anything we can do for this?Congratulations and THANK YOU VERY MUCH FOR ALL YOUR HARD WORK on this, Hash Engineering!!!
Your communication has been excellent, the app is awesome, and the Quark community is very fortunate to have found you!
I will update all my threads re: the wallet update, and please everyone check out (and tweet!) the wallet update link so we can see if there are any last minute bugs that need fixing?
Hash I am sending you a DONATION (and I hope people will join me), because 15k QRK does not amount to much yet for all the hard work you have done...May one donate to the address on the uploaded wallet image, if one were so inclined??..If so, I would like to scan and send from my new cool app 
p.s. I think it is really sweet that we can now check the block explorer for transactions!!! This is awesome  Better peers will come from two things: 1. A good list that the app can have. 2. wait until the bitcoin people get a better peer system built into their code for Java (this will happen this year, I think). For now, the list the app uses is this: static public String[] dnsSeeds = new String[] {
"seed1.qrk.cc", //162.243.253.209 ***
// "seed2.qrk.cc", //95.85.4.223
// "seed3.qrk.cc", //192.241.195.203
"seed4.qrk.cc", //192.241.151.155
"seed5.qrk.cc", //95.85.2.86
// "seed6.qrk.cc", //162.243.138.170
// "seed1.qrkcoin.org", //192.241.151.155 (duplicate)
// "seed2.qrkcoin.org", //95.85.4.223 (duplicate)
"seed3.qrkcoin.org", //193.68.21.25 ***
// "seed4.qrkcoin.org", //95.85.4.223 (duplicate)
// "seed5.qrkcoin.org", //162.243.138.170 (duplicate)
// "seed6.qrkcoin.org", //95.85.2.86 (duplicate)
// "seed1.quarkinvest.info", //192.241.151.155 (duplicate)
// "seed2.quarkinvest.info", //95.85.2.86 (duplicate)
// "seed3.quarkinvest.info", //162.243.138.170 (duplicate)
// "seed4.quarkinvest.info", //95.85.4.223 (duplicate)
// "seed5.quarkinvest.info", //192.241.195.203 (duplicate)
// "seed6.quarkinvest.info", //192.241.151.155 (duplicate)
//"quarkcoin.no-ip.biz", //95.85.2.86 (duplicate)
"quarkcoin.mooo.com", //192.241.171.45
//"qrk.ignorelist.com", //162.243.138.170 (duplicate)
"qrk.redirectme.net", //162.243.253.209 ***
"qrk.no-ip.biz", //192.241.151.155 (duplicate)
};Each line is a node. I did a" ping" on each one and found many that didn't work and others were duplicates of each other. The items with a // in front were found not to exist or were the same as another. However, even though the ping failed from my computer, the phone was able to connect to several of them. If there is another list somewhere that I can use of reliable servers that are always on, that would be great ( http://forum.qrk.cc/thread/267/help-wallet-internet-seed-nodes). This is important, because I think one of the rate limiting steps of syncing the blockchain for new users is the speed of these various nodes. If many people are using the app, the nodes may not be able to handle all the traffic and it may be slow. Currently, I am connected to three with my phone. In the future when the Bitcoin Java Library is updated to include support for getting other node addresses from other peers and saving them for next time, then I will be putting this functionality into the Quark Wallet. Once I get the list of "better" nodes, then I will publish this beta on Google Play for final beta testing. Thanks for the QRK's; they did arrive on my phone Wallet. I back up my keys to ensure that I don't loose my coins during testing and resetting of the blockchain. |
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Native support for the hash function has been added for several devices. Several bugs with Send and Receive Coins have been fixed. Have fun!
great work - so does this now have a new download ? or is it straight on the play store ? Sorry, I forgot to include the link: [link removed - out of date] This should end up on the Google Play store soon. |
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Is the source code available?
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Native support for the hash function has been added for several devices. Several bugs with Send and Receive Coins have been fixed. Have fun!
[link removed - out of date]
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Have you got SHA-256 android wallet.?
Because all list of your projects is SCRYPT coins.
SHA-256 coins are possible also, the only difference is one line of code. Even scrypt coins use the double SHA-256 for the hash values of blocks, transactions and merkle-roots. |
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Native support for the Quark Proof of Work has been developed for several devices. This may speed up sync times as well as reduce battery usage.
The Java version of the Proof of Work took between 4 and 400 milliseconds to calculate (which is 2.5 to 200 hashes/second). The native version on my phone takes about 0 to 1 ms per hash, which is about 1 KH/s or greater.
We are not sure if this will improve sync times, because network connectivity and bandwidth may become the rate limiting step here. Sometimes the ping time with the peers is at 22 seconds! That is outside of our control, unless we have better peers.
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[link removed - out of date]
This update fixes several bugs with the exchange rates and URI schemes.
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This app is really freaking sweet. I have two minor problems though,
1) the app doesn't close. I go back to the main menu, and swipe the app closed in cyanogen mod, but still see "connected nodes" in the status bar.
2) I was able to send a payment to myself from my computer instantly, by manually typing in the phone wallet address. I tried scanning a QR code to send a payment from bitinfocharts.com, but get the following message: "Cannot classify input: quarkcoin:Qeg5SiWkNNQXcXb3cGq5k2d8y3j4uJJH1v"
1) If the "Connectivity Indicator" was activating, then I also had trouble closing the app using the back button. I was able to force close it using other means (of course force closing an app is not ideal). 2) This error is because the App was based on the Quark C++ source code where the URI for addresses is quark:Qeg5SiWkNNQXcXb3cGq5k2d8y3j4uJJH1v. However, the bitinfocharts.com site is using quarkcoin:Qeg5SiWkNNQXcXb3cGq5k2d8y3j4uJJH1v. I will update the code to read either type of URI. |
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My results on Google Nexus 7 2013 (4G) - deb
1. Can you receive coins? (small amounts to avoid losing them)
Yes
2. Can you send coins?
Yes
Its says it's still waiting because I was still syncing the blockchain
Thanks, I recieved the 0.05 QRK. 3. Can you scan a QR code from another phone or Paper Wallet (to send coins).
Yep. send the dev and the guy who posed above me .05 QRK.
4. Can you request coins via email or other android service?
Havent tested
5. How long does it take to sync the blockchain?
Took about 30 minutes. Needs a lite version if possible, or the ability to turn off syncing on data!
This is a lite version, but we will strive to make it lighter. The older versions of the Bitcoin and Litecoin android wallets had options for only syncing when plugged into power. There may be away to only have it sync when on wifi. These are options we will be looking into, but there are reasons why some of these features were taken out of the Bitcoin Wallet. 6. Does it drain out your battery after an hour?
Went from 100% to 88% in exactly one hour. Android reports that the wallet app took half of that
This is another area for improvement. The Hash function may be using much of that power and there is a way to reduce it. 7. How much space does it take up on your phone?
Android reports 51MB
8. Does it calculate exchange rates properly?
Reports $0.0701 for USD. Sounds about right.
Needs the ability to add nodes!
There are only 2 in the app, and one is always +/- 100 blocks apart.
Sending and receiving is deathly slow compared to how fast quark is.
Adding nodes is a function that will be added later. Even the Bitcoin Wallet doesn't support the "addnodes=" and peers.dat features of the desktop client. |
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Downloaded it just now.
Install went without issues on Android 4.2.1
getting two peers connected from the start, so that's good (95.85.2.86 & 192.241.151.155)
Exchange rates tab doesn't work (yet?)
The Camera icon is in a weird spot on the "home" page of the wallet (see screenshot)
Syncing doesn't seem to give any issues, however, the client isn't indicating how much syncing has been done, so it's hard to tell.....
Install space of the Quark app itself is 13,34 MB
Thank you for your feedback. Connecting to two peers is normal. This app does not have the robust connectivity features of the desktop client yet. The bitcoin people will be adding that soon and when they do, I will import those changes into the Quark android wallet. The camera icon appearing at the edge of the screen appears to be due to the sizes of the send and receive buttons. In english these buttons take up less room due to fewer letters to display on the buttons. I will try to see if there is a solution for this. To see about syncing progress, go to options, then Network Monitor and scroll to Blocks if that part is not on the screen. If the last block is from 1 to 5 minutes ago, then the app is synced. |
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After a measure of hard work adapting the Bitcoin Wallet for Android to Quark, the standalone (no cloud or server required) version of the Quark Android Wallet beta is ready for testing. This is a lite wallet and the blockchain doesn't take any more than 626KB on the android device. Source code:https://github.com/HashEngineering/quarkcoinj - Quark Java Library (for the Android App and possibly other software) https://github.com/HashEngineering/quarkcoin-wallet - The Quark Android Wallet Source code Links to Android App:https://github.com/HashEngineering/quarkcoin-wallet/releases/ (view recent beta versions) https://play.google.com/store/apps/details?id=hashengineering.quarkcoin.walletWhen using this app, please back up your keys and email them to yourself! This will save your private keys in a password protected file. Then your coins can be retrieved even if you loose your phone. Planned Fixes in the next Beta Release: 1. Native support for the hash function. It is appreciated if feedback of the following is provided:1. Can you receive coins? (small amounts to avoid losing them) 2. Can you send coins? 3. Can you scan a QR code from another phone or Paper Wallet (to send coins). 4. Can you request coins via email or other android service? 5. How long does it take to sync the blockchain? 6. Does it drain out your battery after an hour? 7. How much space does it take up on your phone? 8. Does it calculate exchange rates properly? If the app crashes you can send the report via email or another method if your phone allows it. Reports of errors can also be posted in this topic. To close the app, simply press the back button until you reach your home screen. The app will close itself (there is no need for a disconnect option). Known Issues: 1. This app may use a lot of battery power while syncing the blockchain, initially. It should use less power after the app is synced. 2. Syncing has been slow. |
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Adding the KGW is an easy copy/paste job. The harder part is choosing the right parameters.
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I looked at the changes you made (4 lines) and it's not increasing anything except the number that is displayed. I'm not sure if you actually believe that there is any improvement or you just posted this in hopes of people seeing a bigger number and would send you a donation.
Impressive. Posting source code is good enough for some, but those that can read it can see if it will really work as advertised. |
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