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If you found something you want to buy and just want to know how to do it on Havana here's the quick and dirty guide to buying on Havana.
First Time Setup
There are a few settings you have to take care of before you can make your first purchase. You probably won't have to change these settings again, and it won't take long. You can get to the Settings page from the Account dropdown box at the top right of every page on Havana.
We're just going to mention the fields you need to fill out to be able to make your first purchase on Havana. Most will be familiar to you if you've ever products on ll quickly go over which entries are necessary to get started at Havana, and how to fill them out.
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These instructions are for Electrum wallet versions 2.00 and newer. If you are currently using an older version, see the FAQ for that wallet version.
If you already have a regular Electrum wallet set up, begin with Step 3. If you have an Electrum multi-sig wallet, begin with Step 2:
Step 1: If you're running the wallet software for the first time, you will be creating a new wallet. Choose regular type wallet not multisig wallet. Make sure and save the wallet seed phrase and if you encrypt your wallet (recommended) remember your passphrase. Continue with Step 3.
Step 2: Open your Electrum wallet and select File-New from the menu and follow the prompts to create a new regular type wallet. Save your wallet seed and if you encrypt your wallet (recommended) remember your passphrase.
Step 3: Open Electrum wallet and select the addresses tab.
Step 4. Find an empty address on your addresses tab and right click on the address. Change the label to "multisig" so you can find the right address if you need it later.
Setp 5: Right click on the address again and select "retrieve public keys". Copy the long number from the text box and paste it into the multisig public key space on the settings pages. Remember to save the settings page after you make changes.
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We recommend you upgrade your Electrum wallet to the latest version. If you want to use your older version it's just a little more difficult but still easy.
Step 1: Go to the tab with your wallet addresses. Pick an empty with no transactios listed for the addresses (the number in the right column).
Step 2: Right click on the address, and change the label associated with the address to say something like Multisig. You may need to remember which address you used if in the future there is any problem. Make sure you keep your wallet and seed safe and backed up,
Step 3: Right click on the address and click Copy Address.
Step 4: Now go to to the "console" tab in Electrum wallet. Next you'll be entering a text command in the console.
Step 5: Don't worry it's easy. At the Electrum wallet command prompt, type the following:
GetPubKeys("ADDRESSYOUCOPIED")
The address from your addresses tab should be inside quotes in the command, replacing the ADDRESSYOUCOPIED text.
Step 6: Hit the enter key. Electrum should return a long key enclosed in quotes. Copy the text within the quotes to your clipboard.
Step 7: Paste the key into the multisig public key space on the Havana settings page. Don't forget to save the settings page.
That's it. You only need to do this the first time before your first purchase on Havana. You may use the same key for all your future purchases.