Wallet Software & Backups

Manna Desktop Wallets (beta version)

Grantcoin has been rebranded to Manna, and Manna branded wallets are here!

These are still going through beta testing, so use at your own risk. Please submit bug reports to [email protected]. Known issue: Some Grantcoin wallet.dat files may not work with these wallets because they were compiled with a different version of Berkeley DB.

You can also continue to use Grantcoin version 0.7.0 wallets through block 1,100,000 in the blockchain. Both can send and receive transactions to each other until that block height, which is expected to be reached in May 2018. Private keys are also compatible between Grantcoin and Manna wallets and can be imported from one to the other.

Grantcoin Desktop Wallets

Download the version you need, unzip, and install on your computer:

Smartphone Wallets (beta testing only)

Web-Based Wallets

Twitter: Send and receive Grantcoin on Twitter using our web-based Twitter wallet app. Anyone with a Twitter account can use it; no download or setup required. This is the easiest way for the average person to get started using Grantcoin. Click here for instructions.

Ripple: Grantcoin could be stored in a web-based wallet on Ripple Trade, a service which was shut down by Ripple Labs in early 2016. The Grantcoin Foundation is exploring other options to provide support for Grantcoin on the Ripple platform. Until then, Ripple users may wish to withdraw their Grantcoin to an external wallet.


Important note about passwords: If you encrypt your desktop or smartphone wallet, we recommend not using the dollar sign ($) or ampersand (&) characters in your password. These special characters could cause errors to occur in the software and make it more difficult to access your funds.


Don’t Forget to Back Up Your Wallet!

If you’re using desktop wallet software, you should back up your wallet on a regular basis. Here are instructions for two methods. We strongly recommend at least doing a digital backup.

Digital Wallet Backup:

To back up your wallet digitally, find the wallet data file (wallet.dat) which is stored on your computer and copy it to another location such as an external hard drive or USB stick. The location where you can find the wallet.dat file depends on which operating system you’re using. See this page which provides instructions for finding the file for a Bitcoin wallet — it will be in the same place for a Grantcoin wallet.

The wallet.dat file contains all the Grantcoin in your wallet and can be importehttps://grantcoin.org/files/use-grantcoin/d to any computer any time you want to access your funds. this file does not contain your password if you encrypted your wallet, so be sure to remember it or write it down; otherwise you will permanently lose your Grantcoin!

You should back up your wallet.dat file at least every 50 transactions. If you’ve made more transactions than that, an old backup could be missing some data and may not contain all your Grantcoin.

Back Up Your Wallet on Paper:

Grantcoin users can create a “paper wallet” by printing out their wallet address and private key (a code that enables you to retrieve the balance of the address). A digital wallet may contain multiple wallet addresses, each of which may hold value, so you will need to print the keys for each one. Also be sure to remember or print your password if you choose to encrypt your wallet.

Step-by-step instructions for creating a paper wallet:

  1. Open your wallet client.
  2. Click on “Help” in the menu bar (top right)
  3. Click on “Debug window”
  4. Select the “Console” tab.
  5. [If your wallet is encrypted] Type: walletpassphrase YourWalletPassword 600
  6. Type: dumpprivkey YourWalletAddress — This will return the private key for the wallet address you entered. Copy the text into a file and print it out along with the address to create your paper wallet.
  7. [If you did step 5] Type: walletlock

How to Import Private Keys:

If you have a private key — e.g. if you created a paper backup of your wallet or if the Grantcoin Foundation created a wallet for you and sent you the key — you can add the funds into a different digital wallet by following these instructions:

  1. Open your wallet client.
  2. Click on “Help” in the menu bar (top right)
  3. Click on “Debug window”
  4. Select the “Console” tab
  5. Type: importprivkey YourPrivateKey

Now if you view your receiving addresses in the wallet, you will see the address associated with your private key has been added, and your balance should include any coins stored in that address.

Important: If you have sent or received Grantcoin, your wallet will probably contain funds in multiple addresses. In fact, a new address is often generated and value automatically transferred to it during many transactions. This feature is to increase the anonymity of transactions from cryptocurrency wallets. If you want to back up all the funds in your wallet on paper, you will need to make a paper wallet for each address that holds any Grantcoin. To find out all the addresses in your wallet, use the same command in the debug window that works for Bitcoin — see this page for more details.

Use at your own risk.

  • Legal Disclaimer — The Grantcoin Foundation is not responsible for any losses that might occur as a result of user error, insufficient understanding of cryptocurrency technology, or bugs in wallet software or services.