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Before we proceed with creating keys and other commands, we will first encrypt the wallet with a password. For this example, we use the encryptwallet command with the password “foo”. Obviously, replace “foo” with a strong and complex password! $ bitcoin-cli encryptwallet foo wallet encrypted; Bitcoin server stopping, restart to run with encrypted wallet. The keypool has b $ We can verify the wallet has been encrypted by running getinfo again. This time you will notice a new entry unlocked_until that is a counter showing how long the wallet decryption password will be stored in memory, keeping the wallet unlocked. At first this will be set to zero, meaning the wallet is locked: $ bitcoin-cli getinfo { "version" : 90000, #[... other information...] "unlocked_until" : 0, "errors" : "" } $ To unlock the wallet, we issue the walletpassphrase command that takes two param‐ eters, the password and a number of seconds until the wallet is locked again automati‐ cally (a time counter): $ bitcoin-cli walletpassphrase foo 360 $ Confirm the wallet is unlocked and see the timeout by running getinfo again: $ bitcoin-cli getinfo { "version" : 90000, #[... other information ...] "unlocked_until" : 1392580909, "errors" : "" } Wallet backup, plain-text dump and restore Commands: backupwallet, importwallet, dumpwallet Next, we will practice creating a wallet backup file and then restoring the wallet from the backup file. Use the backupwallet command to backup, providing the file name as the parameter. Here we backup the wallet to the file wallet.backup: 42 | Chapter 3: The Bitcoin ClientPDF Image | Mastering Bitcoin
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