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Update 3_3_Setting_Up_Your_Wallet.md

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3_3_Setting_Up_Your_Wallet.md
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@ -36,6 +36,8 @@ H3yMBZaFeSmG2HgnH38dImzZAwAQADcOiMKTC1fryoV6Y93BelqzDMTCqNcFoik86E8qHa6o3FCmTsxW
``` ```
You'll get the signature as a return. You'll get the signature as a return.
_What is a signature?_ A digital signature is a combination of a message and a private key that can then be unlocked with a public key. Since there's a one-to-one correspendence between the elements of a keypair, unlocking with a public key proves that the signer controlled the corresponding private key.
Another person can then use the `bitcoin-cli verifymessage` command to verify the signature. He inputs the address in question, the signature, and the message: Another person can then use the `bitcoin-cli verifymessage` command to verify the signature. He inputs the address in question, the signature, and the message:
``` ```
$ bitcoin-cli verifymessage "n4cqjJE6fqcmeWpftygwPoKMMDva6BpyHf" "H3yMBZaFeSmG2HgnH38dImzZAwAQADcOiMKTC1fryoV6Y93BelqzDMTCqNcFoik86E8qHa6o3FCmTsxWD7Wa5YY=" "Hello, World" $ bitcoin-cli verifymessage "n4cqjJE6fqcmeWpftygwPoKMMDva6BpyHf" "H3yMBZaFeSmG2HgnH38dImzZAwAQADcOiMKTC1fryoV6Y93BelqzDMTCqNcFoik86E8qHa6o3FCmTsxWD7Wa5YY=" "Hello, World"
@ -62,7 +64,7 @@ $ bitcoin-cli importwallet backup.dat
## Optional: View Your Private Keys ## Optional: View Your Private Keys
Sometimes, you might want to actually look at the private keys associated with your addresses. Perhaps you want to be able to sign a message or spend a coin from a different machine. Perhaps you just want to back up certain important private keys. Sometimes, you might want to actually look at the private keys associated with your addresses. Perhaps you want to be able to sign a message or spend bitcoins from a different machine. Perhaps you just want to back up certain important private keys.
To look at _all_ the keys in your wallet, type `bitcoin-cli dumpwallet mywallet.txt`. This will create a mywallet.txt file in ~/.bitcoin/testnet3 with a long list of private keys, addresses, and other information. Mind you, you'd never want to put this data out in a plain text file on a Bitcoin setup with real funds! To look at _all_ the keys in your wallet, type `bitcoin-cli dumpwallet mywallet.txt`. This will create a mywallet.txt file in ~/.bitcoin/testnet3 with a long list of private keys, addresses, and other information. Mind you, you'd never want to put this data out in a plain text file on a Bitcoin setup with real funds!
@ -71,6 +73,8 @@ More likely, you just want to look at the private key associated with a specific
$ bitcoin-cli dumpprivkey "n4cqjJE6fqcmeWpftygwPoKMMDva6BpyHf" $ bitcoin-cli dumpprivkey "n4cqjJE6fqcmeWpftygwPoKMMDva6BpyHf"
cW4s4MdW7BkUmqiKgYzSJdmvnzq8QDrf6gszPMC7eLmfcdoRHtHh cW4s4MdW7BkUmqiKgYzSJdmvnzq8QDrf6gszPMC7eLmfcdoRHtHh
``` ```
_What is a private key?_ It's the other half of your keypair. It proves ownership of the public address and allows funds to be used.
You can then save that key somewhere safe. You can then save that key somewhere safe.
You've been typing that Bitcoin address you generated a _lot_, while you were signing messages and now dumping keys. If you think it's a pain, we agree. It's also prone to errors, a topic that we'll address in the very next section. You've been typing that Bitcoin address you generated a _lot_, while you were signing messages and now dumping keys. If you think it's a pain, we agree. It's also prone to errors, a topic that we'll address in the very next section.