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anilk May 1 '18 · Tags: #roi coin #exchange
Hi Everyone.

Today I would like to talk to you about the coin control feature.
This feature is turned off by default and can be enabled in settings->options->wallet tab.
Once enabled you will notice a new section in the Send and Deposit section.
This feature allows you to control where the coins come from in your wallet, specifically which inputs to use when sending or depositing coins. By default the wallet will choose for you automatically.

Recently a user asked me on discord why he could not send or deposit a large amount of coins.
Each time coins have to come from an input in your wallet it requires a certain amount of bytes
to store it in a transaction, before it gets added to a new block.
For example it would cost more transaction bytes to send 1000 ROI coins from 10 different inputs than from a single one.

Each time you receive coins from pool or other people, it will be stored as its own unique input in your wallet. If you want to increase the amount of coins you want to send in one go (or deposit) you will need to use coin control to select as many inputs as can fit in a single transaction and then just send it to yourself ( one of your receive addresses ). This is also known as consolidating your input addresses. This way the next time you send or deposit coins it will come from a single input, which is much cheaper to send ( less bytes means lower fee's ).

In the future I will make a tutorial video showing you how to do this.
I hope this was helpful.


I decided to write this troubleshooting guide as i see sometimes people struggle with finding peers.

First of all, double check that you are running ROIcoin v1.1.0.0 , the best way to do that is
to go to Help->settings->debug window->Information tab and check the field "Client version:"

If you are on the old wallet you will be rejected as a peer , since we did a hard fork.

Next check your clock time is correctly synchronized, once you see peers you can click on them
and it will show "Time offset" field, this should show +/- a few seconds.

The wallet will attempt to contact one of our 15 seed nodes ( built-in addresses in the wallet ) to
find peers. You can also manually add more trusted peers with the "addnode=<IP_OR_Hostname>" parameter in ROIcoin.conf or via the Help->settings->debug window->Console window

If all attempts fail, please enable debug logging and contact me on slack.

You can enable full debug logging by starting with -debug flag or adding the parameter "debug=" in the ROIcoin.conf file.  Contact me on slack and I will help you troubleshoot.

ghobson Dec 19 '17
I have recently been getting questions about wallet security, and decided to write this post to clarify a few things.

1 - The first time you start your wallet it will create a file called wallet.dat, this file contains your private keys and should be backed up.
2 - both the wallet GUI and ROIcoin-cli provide a way to backup the wallet to another location.
3 - You can extract the private keys from your wallet with the following command:
      - goto wallet->help->debug window->console and type:  dumpprivkey <your wallet address>
      Note: your wallet address is one of your receive addresses found in File->receive addresses
4 - This private key string should be kept safe, as it can be used in case of recovery with the importprivkey cli command on a new walet.
5 - For additional (optional) security you can encrypt your wallet with a passphrase, this passphrase is then needed for important operations like sending coins.
6 - VERY IMPORTANT:  dumpprivkey REQUIRES the passphrase (if encrypted) , so if you decide to encrypt and did not export the privatekey , if you later forget the password you have no way to recover access to your coins !!

So to summarize there are 3 levels of security:

LOW LEVEL SECURITY: only backup the wallet.dat file
MEDIUM LEVEL SECURITY: backup the wallet.dat file and export the privatekey to a safe place.
HIGH LEVEL SECURITY: export the private key to a safe space, encrypt the wallet , keep passphrase on a safe space AND backup the wallet.

Hope this helps understand the various options you have at your disposal.
If you have more questions dont hesitate to ask us here or on slack.

// Gary

ghobson Dec 8 '17 · Comments: 1 · Tags: security

ROI Coin is return on investment! We're happy to announce that ROI Coin will be ready for initial launch around mid September. The wallet is currently in beta testing and is close to being ready. This website is under development and is scheduled to be completed by the 1st week of September. Lastly the white paper is currently under final review and will be published before the end of August.

ROI Coin is dedicated to becoming a worthwhile investment. Whether you mine, stake, buy or exchange you will come to love the features that set us apart from other coins. 

Stay tuned for upcoming announcements and be ready to jump in quick so you can reap the benefits of being one of the first ones in!

ROIcoin Aug 21 '17 · Tags: roi coin launch