# Re: Version 0.3.18

Post by: satoshi on December 09, 2010, 02:37:05 PM

New transaction templates can be added as needed.  Within a few days, there will be plenty of GPU power that accepts and works on it.  Network support will be thorough *long before* there'll be enough clients who understand how to receive and interpret the new transaction.

Timestamp hashes are still already possible:

txin: 0.01<br>
txout: 0.00 &nbsp;<appid, hash\> OP\_CHECKSIG<br>
fee: 0.01

If there's an actual application like BitDNS getting ready to actually start inserting hashes, we can always add a specific transaction template for timestamps.

I like Hal Finney's idea for user-friendly timestamping. &nbsp;Convert the hash of a file to a bitcoin address and send 0.01 to it:

Quote from: Hal on December 05, 2010, 11:43:56 PM

> I thought of a simple way to implement the timestamp concept I mentioned above. Run sha1sum on the file you want to timestamp. Convert the result to a Bitcoin address, such as via http://blockexplorer.com/q/hashtoaddress . Then send a small payment to that address.
>
> The money will be lost forever, as there is no way to spend it further, but the timestamp Bitcoin address will remain in the block chain as a record of the file's existence.
>
> I understand that this is arguably not a good use of the Bitcoin distributed database, but nothing stops people from doing this so we should be aware that it may be done.

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Source file: bitcoin-forum-satoshi-nakamoto.tgz

External link: https://bitcointalk.org/index.php?topic=2162.msg28533#msg28533