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Author Topic: If all block chain copies get deleted, what would happen?  (Read 2143 times)
bitcoin1992 (OP)
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October 15, 2014, 04:02:07 AM
 #1

What would happen if all block chain copies get deleted at one time?
KIRAZ
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October 15, 2014, 04:08:51 AM
 #2

There are full members of the community and some are the regular users who have the full software keep the blockchain and know something
about the system they are never going to delete the blockchain.
jambola2
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October 15, 2014, 07:18:39 AM
 #3

Bitcoin would stop.

You need the previous block to "build upon", without which it wouldn't work.
Another genesis block would need to be created...

It's most likely that LTC would just take over...

No longer active on bitcointalk, however, you can still reach me via PMs if needed.
twister
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October 15, 2014, 07:23:26 AM
 #4

Never thought of that and don't think it can happen, let's see what Bitcoin Gurus has to say about this.

 

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Redwan
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October 15, 2014, 07:30:56 AM
 #5

What would happen if all block chain copies get deleted at one time?

the truth is it's not possible but  nothing is impossible for man.....

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notlist3d
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October 15, 2014, 08:25:02 AM
 #6

What would happen if all block chain copies get deleted at one time?

the truth is it's not possible but  nothing is impossible for man.....

There are copies out there saved.   It would not have to start over but might lose some transactions in theory.   But I agree it is a impossible thing to happen.   
Vortex20000
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October 15, 2014, 09:04:08 AM
 #7

Why would all the copies be deleted?

And secondly, they would have to be deleted simultaneously and no one can object.


newflesh
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October 15, 2014, 09:23:55 AM
 #8

Imagine it's impossible due to the number of blockchain backups. Even if there was a virus out there corrupting blockchain files, there are always going to be offline copies on harddrives / USBs etc.
OnkelPaul
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October 15, 2014, 09:25:42 AM
 #9

Since the blockchain is the only place where all bitcoin balances are stored, a deletion of all blockchain copies would mean that no bitcoins exist anymore, of course.

We don't know how long humankind will continue to exist (at the moment, we're working diligently to minimize the time of our presence on this planet), but I suspect that unless a truly catastrophic event exterminates us, some copies of the blockchain will be preserved on hard disks or other media in well-protected places or even in scrapped computers on landfills somewhere.

So I won't say "it can't happen" but it is an extremely unlikely event, and when that event happens, nobody would be left to bother, so why should we bother now?

Onkel Paul

Kluge
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October 15, 2014, 09:45:13 AM
 #10

Looking at checkpoints file, I'd guess everyone'd start at the genesis block (hard-coded in the client) until we get to block 11111, the earliest block acting as a checkpoint. I'm not sure what'd happen when a client reaches that block, but since difficulty isn't hard-coded, we'd reach block 11111 pretty quickly... I'd guess it'd either cause "misbehavior score" to increase, resulting in clients banning themselves, or the client notices this and presents some kind of "your data's corrupted" message and stops trying to process blocks until the client's restarted.
zetaray
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October 15, 2014, 10:13:58 AM
 #11

There are so many backups of the blockchain, we would never have to start over. The problem is when we have different copies with different block heights, which one should we choose to be the main chain.

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dothebeats
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October 15, 2014, 12:42:55 PM
 #12

If ever the blockchain is deleted simultaneously (which is very unlikely to happen), there will be no bitcoin, of course. But if someone ever backed up a copy of the chain, we can use that as our main chain in order to continue the blockchain.

It may be very improbable, but there's always a possibility (like some very tragic or catastrophic event) for things like this to happen.
jambola2
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October 16, 2014, 04:16:25 AM
 #13

Looking at checkpoints file, I'd guess everyone'd start at the genesis block (hard-coded in the client) until we get to block 11111, the earliest block acting as a checkpoint. I'm not sure what'd happen when a client reaches that block, but since difficulty isn't hard-coded, we'd reach block 11111 pretty quickly... I'd guess it'd either cause "misbehavior score" to increase, resulting in clients banning themselves, or the client notices this and presents some kind of "your data's corrupted" message and stops trying to process blocks until the client's restarted.

Ahh, I wasn't aware that the genesis block was hard coded into the client.

Whatever the case, resetting Bitcoin would destroy all companies involved in it, and remove the likelihood of anyone trusting Bitcoin ever again.

No longer active on bitcointalk, however, you can still reach me via PMs if needed.
Kluge
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October 16, 2014, 04:37:58 AM
 #14

Looking at checkpoints file, I'd guess everyone'd start at the genesis block (hard-coded in the client) until we get to block 11111, the earliest block acting as a checkpoint. I'm not sure what'd happen when a client reaches that block, but since difficulty isn't hard-coded, we'd reach block 11111 pretty quickly... I'd guess it'd either cause "misbehavior score" to increase, resulting in clients banning themselves, or the client notices this and presents some kind of "your data's corrupted" message and stops trying to process blocks until the client's restarted.

Ahh, I wasn't aware that the genesis block was hard coded into the client.

Whatever the case, resetting Bitcoin would destroy all companies involved in it, and remove the likelihood of anyone trusting Bitcoin ever again.
Yup. It's in chainparams.cpp and even includes Satoshi's message:

        const char* pszTimestamp = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
        CTransaction txNew;
        txNew.vin.resize(1);
        txNew.vout.resize(1);
        txNew.vin[0].scriptSig = CScript() << 486604799 << CScriptNum(4) << vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
        txNew.vout[0].nValue = 50 * COIN;
        txNew.vout[0].scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef3 8c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
        genesis.vtx.push_back(txNew);
        genesis.hashPrevBlock = 0;
        genesis.hashMerkleRoot = genesis.BuildMerkleTree();
        genesis.nVersion = 1;
        genesis.nTime    = 1231006505;
        genesis.nBits    = 0x1d00ffff;
        genesis.nNonce   = 2083236893;

        hashGenesisBlock = genesis.GetHash();
        assert(hashGenesisBlock == uint256("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"));
        assert(genesis.hashMerkleRoot == uint256("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));

The source is really well-explained. I was surprised. I only just finally started to really look through it after 3 or 4 years... It's massive (relative to the tiny little things I've done in a short time), though.
EternalWingsofGod
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October 16, 2014, 04:47:14 AM
 #15

What would happen if all block chain copies get deleted at one time?
It would be an unusual scenario to say the least
I would assume it would resolve and restart from the next longest chainstate someone has a copy of
That or a fork if the main chain broke for some weird reason or other (not likely to happen again) unless some new software comes out that makes its own sidechain.

@ Kluge thats neat thanks for sharing.

Simon8x
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October 17, 2014, 02:27:09 PM
 #16

There are almost 7000 full nodes https://getaddr.bitnodes.io/, meaning there are at least that number of full copies of blockchain distributed around the world. So I wouldn't be worried about the situation you described to happen.

silversurfer1958
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October 18, 2014, 12:00:47 AM
 #17

Govts or Bankers might choose to corrupt them.

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October 18, 2014, 12:09:18 AM
 #18

There are almost 7000 full nodes https://getaddr.bitnodes.io/, meaning there are at least that number of full copies of blockchain distributed around the world. So I wouldn't be worried about the situation you described to happen.

And at least you and me we have another copy of it  Cheesy Cheesy


OP, It's very difficult to get all copies deleted... keep in mind that for example in my case I have periodic copies from all the blockchain and wallets on many USB devices... so if other people do the same, we have at least two more blockchain copies  Tongue

I've never though about that. But it's 99'9999^99% impossible, wallets and blockchain copies can't disappear like magically  Roll Eyes

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October 19, 2014, 01:08:25 AM
 #19

The advantage of having a distributed ledger is that there are multiple copies of the block chain. So it is highly unlikely that they will all get deleted at the same time.

This might be a problem with fiat banks - what happens when all copies of their ledger get corrupted at the same time.  Grin


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October 19, 2014, 10:35:34 PM
 #20

I think there are near no ways to occur that all block chain copies get deleted; since there are lots of mirror.

Centaurus
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