HODLER Wallet - The Only Open Source Multi-Asset Wallet

[eternalgloom]

I never thought I'd see pascal again in my life let alone see a project. i'll try checking the code to see how much of it i remember.

Yeah indeed, it's been ages since I've seen a project using this language.
Reminds me of my high school days where our computer teaches would let us write small little apps in BASIC or Object Pascal later on.

Very interesting to see a wallet written in this language.

[HODLER_TECH]

How can you timelock coins cant the user just get there private key and use it with a different wallet and access them if they change there mind?
defeating the purpose of the timelock

The TimeLock wallet mode will require the password generated by the application (which user does not know until the lock is removed) to export the key. A normal wallet requires only a master password.


@RNS-SOL
Thank you!

[pooya87]

ok, i looked at some of the code. i see that you have basically written the elliptic curve calculates on your own. are you sure they are correct? is it tested?

i didn't understand two things:
1. why are you doing this check? r + s doesn't have to be dividable by 2. and i can't find it anywhere that says this check is needed. do you know any reason i am missing? see 4.1.3 of SEC1
also i believe this mod is completely unnecessary as the numbers you are giving it are 256-bit and mod with that larger number will return the same thing. not to mention that where it is being called the numbers (r and s for instance) must be 32 byte otherwise the implementation would be broken.
2. the other thing i didn't get is why are you using the private key itself for generating a random number for signing. isn't there any better RNG provider to use?

might i also suggest Separation of concerns. some files are too large (as in 1000+ lines) and it seems like they don't all need to be in one place.

nitpicking but DER Format comment should really move to line 252 because that is where you are DER formatting

[JanEmil]

@pooya87

The power of opensource

[FL4RE]

ok, i looked at some of the code. i see that you have basically written the elliptic curve calculates on your own. are you sure they are correct? is it tested?

i didn't understand two things:
1. why are you doing this check? r + s doesn't have to be dividable by 2. and i can't find it anywhere that says this check is needed. do you know any reason i am missing? see 4.1.3 of SEC1
also i believe this mod is completely unnecessary as the numbers you are giving it are 256-bit and mod with that larger number will return the same thing. not to mention that where it is being called the numbers (r and s for instance) must be 32 byte otherwise the implementation would be broken.
2. the other thing i didn't get is why are you using the private key itself for generating a random number for signing. isn't there any better RNG provider to use?

might i also suggest Separation of concerns. some files are too large (as in 1000+ lines) and it seems like they don't all need to be in one place.

nitpicking but DER Format comment should really move to line 252 because that is where you are DER formatting

We are very pleased that someone from outside looks through our code.
This unit, secp256k1.pas was written by me, so I will tell you about your remarks.
This mod is required due to a flaw in BigInteger class which allows to generate n-bit integer number where n is all free bits in RAM. Sometimes it create an 257 bit number even with 256bit constraits in upper lines. So this module is security check to not allow damaged r,s pair appear in signature.
About d number (priv) in k generating you got right, there should be a trngBuffer instead of d. It will be changed in next release.
This comment about DER formatting has been missed out when code was moved down. 
Our signatures are correct and they have been tested few thousand times. 
Thank you for your contribution

[HODLER_TECH]

We'd like to invite you all to take part in the HODLER Wallet infrastructure tests. The total sum to be won this time is 2,000 USD worth of bitcoin. Every one of you has an equal chance to grab some of this money.

On 6.11.2018 in we will publish backups (including passwords) to 100 wallets, with 20USD worth of bitcoin on each of them. The total sum of the prizes is 2,000 USD. All you have to do in order to win this money is join our Telegram group where the backups will be published (https://telegram.me/HODLER_TECH_IN ), have HODLER Wallet installed, use it to restore a backup as fast as you can, and send the stored money to your own address. There's no limit to how many wallets one person can take funds from, so if you're quick there's a lot of money to be made.

The minimum number of people required for these tests to start is 5,000, but for them to give fully reliable results we would like around 10,000 people to participate. That's why we encourage you to share this information about the tests everywhere you can.

[CoolWave]

Installed Windows wallet , looks fine to me . I hope this application will add more security as a statement made by @LoyceV made me bit concerned . I have installed this application in main laptop that has all other wallet data & till now everything is good .

[HODLER_TECH]

Installed Windows wallet , looks fine to me . I hope this application will add more security as a statement made by @LoyceV made me bit concerned . I have installed this application in main laptop that has all other wallet data & till now everything is good .

Thanks for trying out our wallet. We are constantly getting community feedback through our Telegram channel (https://telegram.me/HODLER_TECH_IN) and so far nobody has reported any security related issues. We are the only fully Open Source multi-wallet on the market and anyone can review and verify the code. Furthermore, we will soon undergo an independent security audit which willl confirm the highest grade of security delivered by our project.

[angel55]

Installed Windows wallet , looks fine to me . I hope this application will add more security as a statement made by @LoyceV made me bit concerned . I have installed this application in main laptop that has all other wallet data & till now everything is good .

Thanks for trying out our wallet. We are constantly getting community feedback through our Telegram channel (https://telegram.me/HODLER_TECH_IN) and so far nobody has reported any security related issues. We are the only fully Open Source multi-wallet on the market and anyone can review and verify the code. Furthermore, we will soon undergo an independent security audit which willl confirm the highest grade of security delivered by our project.

I love seeing great projects like this starting out and gaining adoption.  Its a beautiful thing to watch a project grow right in front of your eyes.  I hope this wallet succeeds, good luck.

[h0lybyte]

It looks like no other wallets have come up with such an amazing functionality till yet but it is also a bigger achievement if "timelock" works as described.
I am thinking to try this open source app in my smart phone, will write for support if needed

[HODLER_TECH]

Thank you for your kind words, it is very important to us. This is the biggest award for over 9 months of writing, planning, implementing, testing and communicating with the community. We have completely absorbed us, we are constantly wondering what to improve, what to add to the wallet to make it even better.

Society has a great share in the development of our software. Everything we introduce we consult with active community members. The wallet is built by you and for you.

You ask a lot about timelock, so we get to work and soon we will send a test solution

[ImHash]

Why would you give away money to people for testing an open source wallet? Are you getting anything out of this? This is like Satoshi paying people to try out bitcoin Do you also have another means of communication other than telegram?

[HODLER_TECH]

We want to popularize our software because there are many opportunities to earn if you have a good and popular wallet. Integration with the  exchanges of our "retailer mode" feature, coin listing and promotion of the commercial HODLER Hardware Wallet solution. We prefer advertising expenditures directly to users than to pay tens of thousands of dollars for articles in the media. We want the community to feel connected with us and recommend our wallets. This is the win-win situation. We have a long-term development strategy.

[h0lybyte]

I just downloaded android app from Holder website,  it looks exactly another myetherwallet but very easy interface and secure enogh.
So far everything works correctly, i hope Hodler will become one of  the most used wallet in market fornits security

[genievic23]

 I've been one of the first to support this project and I'm amazed by how this project improves continuously and gets better and better.

[abduramann]

We'd like to invite you all to take part in the HODLER Wallet infrastructure tests. The total sum to be won this time is 2,000 USD worth of bitcoin. Every one of you has an equal chance to grab some of this money.

On 6.11.2018 in we will publish backups (including passwords) to 100 wallets, with 20USD worth of bitcoin on each of them. The total sum of the prizes is 2,000 USD. All you have to do in order to win this money is join our Telegram group where the backups will be published (https://telegram.me/HODLER_TECH_IN ), have HODLER Wallet installed, use it to restore a backup as fast as you can, and send the stored money to your own address. There's no limit to how many wallets one person can take funds from, so if you're quick there's a lot of money to be made.

The minimum number of people required for these tests to start is 5,000, but for them to give fully reliable results we would like around 10,000 people to participate. That's why we encourage you to share this information about the tests everywhere you can.

I really like this type of airdrop. Up to November, will iOS or MacOS version be released? Otherwise, I have to use my wife's phone. She may want some commission from me

[HODLER_TECH]

We'd like to inform you on what we are now currently discussing.

As you all know, we plan to implement a "Retailer Mode" feature. It will enable:

1. Easy cryptocurrency payments in stores
2. Automatically processing incoming payments to user's preferred exchange when they will be instantly sold for fiat, so that the seller doesn't has to be concerned with volatility.
3. Generating clear settlements which the seller could add to the settlement documentation of his business (using fiat prices on the day of selling cryptocurrency)

Since we don't intend to require huge knowledge about cryptocurrencies from retailers, this feature will be turned on as a separate, distinct wallet mode, very simple, looking like a traditional bank account. The balance will be displayed in fiat by default (with cryptocurrency balance possible to be enabled in the settings), there will be no fee options (dynamic fee set as default), display names will be adapted to resemble the ones used in bank accounts. Retailer Mode will be useful for very inexperienced cryptocurrency users, we want to add there tutorials and detailed descriptions of features with recognizable vocabulary so that HODLER Wallet will remain a great choice of application for the people who are just starting to get interested in cryptocurrencies.

Do you have any suggestions and ideas concerning this feature?

For example, one of the users suggested integrating HODLER with exchanges enabling trading cryptocurrency for cash, as well as with third party Bitcoin ATMs. We are planning to start talks with providers of such services.

Here's how Retailer Mode will work:

Code:

Retailer Mode is a feature that enables accepting payments that are automatically sent to a chosen exchange (the first one supported will be Kraken). It will be a new, special mode of the HODLER Wallet:

1. It will enable accepting 0 conf to the amount limit set up by the user. It is important for both the retailer and buyer to know instantly that a payment has been processed. Currently HODLER Wallet displays a transaction as "Unconfirmed", in Retailer Mode it will mean that a payment has been made.

2. Accepting payments will be possible in few ways:
a) for a HODLER Wallet address
b) for an exchange address imported as "watch only"
In both cases the seller can configure how to sell cryptocurrencies on the market (for example set it to once a day on a specific time), and how often to send fiat from the exchange to their bank account. If cryptocurrencies are accepted for HODLER Wallet, the seller can configure when to send them to an exchange and change to fiat so that a fiat payout can be made according to a planned schedule.

Concerning the GUI - turning on Retailer Mode will be available from "Settings" tab. After turning it on, configuration will take the users through few simple steps:
1. Choosing language and fiat currency
2. Choosing the exchange that will process the transactions, store cryptocurrency and send fiat payouts. In this step the user should fill in the API keys.
3. Choosing the accepted cryptocurrencies. The seller can choose from the ones who are paired to the chosen fiat on the chosen exchange. HODLER Wallet automatically checks which cryptocurrencies can be traded for a chosen fiat currency on the user's preferred exchange. 
4. Configuring other settings, like amount limit for 0 conf, how the funds are stored (on an exchange or in HODLER Wallet), selling to fiat frequency (immediately, once an hour, once a day or on a specific time, etc.), frequency of fiat payouts (immediately, once an hour, once a day or on a specific time, etc.). If the chosen exchange's API supports choosing from different bank accounts to send fiat to, that option will also be available. The 4th step of configuration can, if needed, be divided into more steps.

[HiDevin]

Just a question but when is the time-lock feature coming out? Or has it already came out already?
I just want to use this wallet to keep my funds safe from trying to buy random crap off the internet.

Also about the "Retailer Mode", would you need to do any KYC or something similar to that?

[HODLER_TECH]

We will only operate in cryptocurrencies, so KYC is unnecessary. 

Timelock can be pre-promised within 3 weeks, in the 0.2.8 update, if we are not buried with more important issues to current functionalities.

[HODLER_TECH]

We have just sent an email to our investors asking for the address to which the HODLER Hardware Wallet Prototype will be sent. In case you haven't receive this email, please send us a private message or an email to feedback@hodler.tech from the address you used while purchasing HDL tokens.