zWGR Backup Seed
With the implementation of version 2 of Zerocoin, is it now possible and quite easy to export the zWGR private seed for the client. This is a far safer way of backing up than just with the wallet.dat file alone that can by itself quite easily corrupt with sudden data loss or similar computer or user malfunction. The zWGR seed is a character string, and can be safely stored away from the host machine and client on a couple of USB thumb drives, CDRs, Secure Photograph or even very carefully written down (but this is not generally advised)!!
How to Export the zWGR seed
Whether the wallet is locked, or unlocked for staking/masternode functions, you will first need to fully unlock the wallet under the Settings menu.
Select Settings, then “Unlock Wallet…” and uncheck “For anonymization, automint, and staking only.”
Alternatively, you can do this from Debug Console, which is where we will enter the export command anyway. Open the ‘Debug Console’ from the File Menu > Tools > Debug Console, then do:
walletpassphrase <YourPassphrase> 600
*Replace <YourPassphrase> with the client unlock password you set
*600 is seconds before the wallet autolocks and the ‘time til lock’ can be adapted if desired.
Next:
getzwgrseed
A long character string with then be returned in the console - this is the PRIVATE seed of your zWGR account holdings, keep this keep SAFE (preferably in encrypted storage), copy onto two external backup devices and do not disclose to anyone.
***When you are finished, don’t forget to lock your wallet again!***
Import the zWGR seed
Should you need to import the backed up seed due to wallet consolidation or even as a restore method, firstly unlock the wallet by doing:
walletpassphrase <YourPassphrase> 600
*Replace <YourPassphrase> with the client unlock password you set
*600 is seconds before the wallet autolocks and the ‘time til lock’ can be adapted if desired.
After the wallet is unlocked for further functions, do:
setzwgrseed <YourzWGRseedHere>
After some computational time, the ‘success’ status will be returned and now the zWGR seed has been imported into the client.
Similar to:
zWGR seed import finished.
Importing v1 to v2 zWGR (wallet.dat method)
If you have an old version 1 zWGR wallet.dat file, you can safely import this into the new versioned client data directory, then spend it as usual. You can can re-mint it as v2 zWGR, and subsequently back up via the zWGR seed.
ADVANCED: Importing v1 to v2 zWGR (console method)
First, fully unlock the two wallets between which you need to move the zWGR v1.
Next, export your zWGR v1 keys via the ‘Debug Console’ with:
exportzerocoins false <denomination>
Optionally replace <denomination> with the denomination (1, 5, 10, 50, 100, 500, 1000, 5000) of zWGR you would like to export. Leave <denomination> blank to export all zWGR v1 keys.
Save this output to a plain text document and close the wallet.
Next, re-import your new wallet.dat, or launch the secondary wallet on another computer, fully unlock it, and import this data with the command:
importzerocoins ‘[importdata]’
The input format is as follows:
importzerocoins
‘[{"d":denomination,"p":"pubcoin_hex","s":"serial_hex","r":"randomness_hex","t":"txid","h":height,"u":used},{"d":...}]’
Enter the command and formatted data exactly as shown above. Each zWGR v1 key can be entered consecutively, separated by a ‘,’. You can enter ‘help importzerocoins’ for further instructions and examples.
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