Hi.
I am interested in the process followed during the early days of bitcoin mining - back in 2009, 2010.
I understand that mining was performed on home computers, and the difficulty level was obviously much easier than now
(and the block reward was 50 btc)
What I do not understand is why each block that was mined back then seems to go into a new, unique, bitcoin address?
For instance, look at block 1001
http://blockexplorer.com/b/1001
The block reward went to address 1FJNKtXWjbNA1TBzCyTEnoMEbC8XsFPmFF
This address is never re-used. (afaik)
Look at block 1002, 1003, 1004, etc. They all are associated with new addresses.
I have (just manually), clicked through dozens of those early block rewards, and none of the addresses seem to be ever re-used.
Surely if there were only a handful of miners back then, each miner would have only one address that the block reward would have been being sent to? Why do none of those early bitcoin addresses have more than one block reward added into them?
Can anyone explain?
If I had done some bitcoin mining back then, would I have a unique bitcoin address that contained the sum of my mining efforts?
Thanks
Dave

Hi
As part of my life as Dave Bitcoin at walletrecoveryservices, I receive a variety of strange requests. Here is one::::

I have received a bitcoin-qt wallet from a client, that appears to show an unconfirmed transaction credit from the 2nd of December 2013, for 10 BTC.
You can see it at
http://imgur.com/RxcwT32

The transaction id is
386d286d238836f2ac3c3a2e9b2afca403663d7a50c386696eef5a02c36eeeef
and the amount is
10.00292743

I offer a bounty of 20% of the amount (ie 2 btc) to whoever can first make this payment confirm. (my client will benefit, I will benefit, and one of you will benefit

Now, I can't find this transaction on the blockchain, so presumably it either never existed, or it was included in a block that was gazumped. However, if the source data for this transaction were to be located, and replayed into the network, could it then be included in the blockchain? Does anyone keep records of transactions that were broadcast, but never made it into the 'longest' blockchain? Did something funny happen to the bitcoin network in early December 2013? Is this an example of transaction malleability?

There is also the distinct possibility that this wallet is actually a litecoin wallet, or dogecoin, or whatever. (is there any way of telling, from the wallet.dat file?) Or maybe the wallet was operating on testnet?

Any help or suggestions would be appreciated.
Cheers
Dave

Hi
I'm trying to understand/duplicate the second-level password encryption used at the blockchain.info site.

https://blockchain.info/wallet/wallet-format

Their site says that the dpasswordhash value is calculated as 10 rounds of SHA256 on the sharedKey plus the secondpassword.
   
var dpasswordhash = Crypto.SHA256(sharedKey + secondPassword);

However, when I try to duplicate this functionality, I get a different dpasswordhash value.

Has anyone got some pseudo-code that can show this working (and actually getting the correct dpasswordhash value)?
(I can't make much sense of the javascript available at their site)

I've tried various things, such as using command line openssl, as per
openssl dgst -sha256 -hex -out tempout.txt tempin.txt

or similar, but I can't get the right answer
grrrr
Thanks for any advice!

[HiI have put together a service to help you recover your wallet password (for your encrypted bitcoin wallet) if you have forgotten it.Refer to walletrecoveryservices.comI hope this will be useful to someone.(and before you ask, no, this isn't a scam to steal your bitcoins! )CheersDave]

Hi
I have put together a service to help you recover your wallet password (for your encrypted bitcoin wallet) if you have forgotten it.
Refer to walletrecoveryservices.com
I hope this will be useful to someone.

(and before you ask, no, this isn't a scam to steal your bitcoins! )
Cheers
Dave

Hi
I have put together a service to help you recover your wallet password (for your encrypted bitcoin wallet) if you have forgotten it.
Refer to walletrecoveryservices.com
I hope this will be useful to someone.
Cheers
Dave