|
Title: Absolute minimum Wallet size? @DEVs!! Post by: oOoOo on July 29, 2011, 04:15:12 AM What is the absolute minimum amount of information that needs to be in the wallet.dat file in order to be accepted by the client?
I guess a single private key should be sufficient, but what exactly has to go into the wallet.dat file? Can any of you devs please give me a dump (./db_dump) of the smalles possible file so I can take a look at it? Or maybe you could just post a link to your "nanowallet.dat" file in this thread. I think you should use a testnet key for this^^ Anyone?!? Title: Re: Absolute minimum Wallet size? @DEVs!! Post by: indio007 on July 29, 2011, 04:21:40 AM I started the exact same thread. I don't remember getting a satisfactory answer.
Title: Re: Absolute minimum Wallet size? @DEVs!! Post by: koin on July 29, 2011, 07:39:02 AM What is the absolute minimum amount of information that needs to be in the wallet.dat file in order to be accepted by the client? I guess a single private key should be sufficient, but what exactly has to go into the wallet.dat file? Can any of you devs please give me a dump (./db_dump) of the smalles possible file so I can take a look at it? bitcointools might help you create one yourself, i'm not sure though: http://github.com/gavinandresen/bitcointools Title: Re: Absolute minimum Wallet size? @DEVs!! Post by: oOoOo on July 29, 2011, 12:25:07 PM No, I don't want to create one myself, I want to know the minimum size required!
Title: Re: Absolute minimum Wallet size? @DEVs!! Post by: koin on July 29, 2011, 04:48:38 PM No, I don't want to create one myself, I want to know the minimum size required! sorry, i don't know the answer. this is not something useful for other bitcoin users as even if the wallet had only one key, the wallet.dat file would grow significantly after the very first transaction. perhaps you could explain for what purpose this is useful to you? maybe then someone else might be more interested in figuring out an answer. Title: Re: Absolute minimum Wallet size? @DEVs!! Post by: indio007 on July 29, 2011, 06:01:56 PM My purpose is to make paper bitcoins in qr code with set face values.
these would pretty much be onetime use. basically it would work like this. Take empty wallet open wallet.dat in notepad. save gibberish to qr code send 5 btc to wallet Now when someone gets the paper scan qr code save gibberish as wallet.dat copy to bitcoin directory start bitcoin client One side of the paper will be qr code with visible embedded address so amount can be verified visually or with scan with blockexplorer otherside has the wallet.dat as ascii text just as cash physical security is necessary. Title: Re: Absolute minimum Wallet size? @DEVs!! Post by: bitplane on July 29, 2011, 07:37:46 PM The best option would be to use a separate tool to create wallet.dat from a single keypair, or a different client that doesn't need a bloated wallet
Title: Re: Absolute minimum Wallet size? @DEVs!! Post by: vector76 on July 29, 2011, 08:41:14 PM A wallet contains:
- public key/private key pairs for your addresses showing in the UI - public key/private key pairs for the key pool and 'change' addresses, which are invisible in the UI - records of transactions you have made, both sending and receiving - your 'default key' - public keys and associated names in the address book, for sending only, not receiving - various other client settings, such as whether to use a proxy, default transaction fee, etc.. Almost all of this data is useless for the case you are describing. Rather than importing a wallet, you only need to import a single key. Just generate a new address, send coins to that address, and produce a qr code that contains a single public/private key pair. You technically only need to save the private key, and the public key can be generated from it. So the minimum is 256 bits, or 32 bytes. If you had a standard way to deterministically generate keys, you might be able to get away with half that. |