Keypool bitcoin wiki
Only top voted, non community-wiki answers of a minimum length are eligible. Questions Tags Users Badges Unanswered. Tag Info users hot new synonyms. Hot answers tagged keypool day week month year all. How many addresses does my wallet. Do I need to make a new backup every time I make a transaction?
By default, Bitcoin Core creates addresses the first time it starts, and tries to keep not-yet-used keys in wallet.
So you do not need to backup continuously. The 'getinfo' RPC command will tell you the time when the oldest not-yet-used key was generated ' Once a wallet file is initially created, does the reference client generate additional private keys? When a wallet is created, it contains keys in its "key pool". Only one of them is made visible, but when you create a new address, it actually just takes one key from the pool.
The reason for this is so you don't need to backup your wallet. Less backing up Cons: Your wallet will be bigger file size and take maybe a few seconds extra to load. Nicolai 1, 11 A wallet by default always contains unused keys. Every time the client needs a new key for a new address, for sending change to, or - in theory - for solo mining payoutsit takes the oldest address from the pool, and creates a fresh one to add.
This just means you need to backup every transactions. No need to switch to a new wallet. What happens when an encrypted wallet runs out of keys? If the key pool is empty and the wallet is locked it will use an old key instead of generating a new key. When wallet encryption was implemented the block creation code was changed to make sure different coinbase transactions are generated in that case. How do I list the addesses in my keypool? That's a tricky one.
If you haven't modified the 'keypool' parameter then your key pool will contain "unassigned" addresses. These addresses are controlled by your wallet but remain in a latent state in your client until you explicitly request for a new address. The thing is that every time you request for a new address, a new one will be added to George Kimionis 2, 1 7 Providing that you're referring to BitcoinCore, and that by "not being used right now" you mean there's no transaction associated with them yet, you can use this command to list them: Jozef Knaperek 1, 5 Can I have multiple working public keys per wallet?
Your wallet keeps all private and public keys it ever used indefinitely. You do not lose coins on old private keys when you give out new addresses. It is just a privacy measure to give out new addresses for each transaction. It prevents your business partners from knowing about other transactions you have received and sent.
All addresses can be used How do I flush the keypool? If you call getnewaddress times via RPC for bitcoind, in the debug console for Bitcoin-Qtthe key pool is flushed. After that, you can request one more new address and send all your funds there. Key pool in wallet softwares. How about multibit or electrum?
Do they also use a key pool? Electrum is deterministic and addresses are derived from your seed. Each time you need a new address, Electrum calculates it and shows it in the client.
Being deterministic lets Electrum recover your entire wallet addresses from your seed, so you don't need to backup your wallet file every time Bitcoin-QT with standard settings will keep unused addresses in your wallet at all times.
The goal is that backups will be future proof to some extent. A key pool allows to create backups in bigger intervals Every time you create a transaction, the remainder of the input balance is sent to a new address in your own wallet. If addresses were generated Do keypool keys from an unencrypted wallet backup become unusable once I encrypt my wallet? They don't become invalid.
When you ask for a new address from the client, it will not choose any that it has already given you. This is for your privacy, because it makes it more difficult to associate those addresses with you. In this case, we're making them as used for a different reason. To explain why, let's suppose the wallet didn't treat the Why can't I connect to bitcoind on localhost? For some unknown reason my local interface was down. I fixed it with: One thing I noticed is that the address creation is noticeable faster now than I remember it - so perhaps upgrading to a recent version of the client will speed things up for you.
It is also recommended that immediately after encrypting that you then spend your coins that existed prior to encryption to a new address generated post-encryption. That way if your old wallet backups were to fall in the wrong hands, your funds would still be safe. If you didn't do that, then your funds are still spendable from the wallet that was backed Is the keypool erased when changing wallet password?
No, because the encrypted keys don't change in that case. When you encrypt a wallet. When you change the passphrase, only the encrypted master key is changed. Most people don't need to use keypoolrefill. Bitcoin Core tries to fill the keypool to its configured maximum size whenever you take an address from the keypool.
It does not wait until the keypool is empty before regenerating it. However, it isn't possible to add keys to the keypool unless the wallet is unlocked with walletpassphrase. So if you call Why does my wallet size increase over time? Mind that every wallet-relevant transaction is stored together with some metadata in your wallet. Jonas Schnelli 4, 10 What are the contents of the wallet.
What is Key pool, default key and reserve keys? The page you are referring to on the Bitcoin wiki is pretty dated and doesn't really relate to current behavior in Bitcoin Core. Be aware that a lot of the wiki is like this.
Reserve keys and the keypool are essentially What does the keypoololdest field mean? The value is exactly Sat, 15 Feb This timestamp can be used to check if a wallet backup still covers all your used keys or a new one needs to be Badr Bellaj 5 API to know if bitcoin-core has the private key in the wallet.
It will give you all information about that address, including whether it has the private key it will "ismine": What I ended up doing was more or less what Pieter Wuille suggests: Using getnewaddress would have cluttered my list of receiving addresses. How to list all addresses in a deterministic wallet?
How many keys can be generated by a deterministic wallet? The same as a non-deterministic wallet which just keeps generating random private keys. It is effectively infinite. Is it possible to list all keys public keys, to avoid leaking critical information in How do you get back the private keys you used, after you deploy your wallet with a 12 word seed?
A long sequence of private keys can be computed from the seed in a standard way. The new client will import those keys for your use, while computing the corresponding addresses and checking the block chain to see which ones have been used. When it finds many keys in a row that haven't been used perhaps several hundred; this number may be configurable in Restore keys from keypool. Keypool keys are already in wallet.
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