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{{#seo:
|title=Genesis block – First block of Bitcoin or Altcoin – zaoniao Wiki
|keywords=genesis block, block, bitcoin, block, zero, block 0, first
|description=Genesis block is the first block of a blockchain. Modern versions of Bitcoin number it as '''block 0''', though very early versions counted it as block 1. All cryptocurrencies have a Genesis block, but the first bitcoin block is more special as it was the first one.
}}
<amp/>
[[File:1_C4gfcQbjx6cyCQBlmPCGZA.png|thumb|700px|Genesis block]]
'''Genesis block''' is the first block of a [[blockchain]]. Modern versions of Bitcoin number it as '''block 0''', though very early versions counted it as block 1. The genesis block is almost always hardcoded into the [[software]] of the applications that utilize its blockchain. It is a special [[case]] in that it does not reference a previous block, and for [[Bitcoin]] and almost all of its derivatives, it produces an unspendable subsidy.

==What is Genesis block?==
Here is a representation of the genesis block as it appeared in a comment in an old version of Bitcoin. The first section defines exactly all of the variables necessary to recreate the block. The second section is the block in standard printblock format, which contains shortened versions of the data in the first section.

GetHash() = 0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f
hashMerkleRoot = 0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b
txNew.vin[0].scriptSig = 486604799 4 0x736B6E616220726F662074756F6C69616220646E6F63657320666F206B6E697262206E6F20726F6C6C 65636E61684320393030322F6E614A2F33302073656D695420656854
txNew.vout[0].nValue = 5000000000
txNew.vout[0].scriptPubKey = 0x5F1DF16B2B704C8A578D0BBAF74D385CDE12C11EE50455F3C438EF4C3FBCF649B6DE611FEAE06279 A60939E028A8D65C10B73071A6F16719274855FEB0FD8A6704 OP_CHECKSIG
block.nVersion = 1
block.nTime = 1231006505
block.nBits = 0x1d00ffff
block.nNonce = 2083236893

CBlock(hash=000000000019d6, ver=1, hashPrevBlock=00000000000000, hashMerkleRoot=4a5e1e, nTime=1231006505, nBits=1d00ffff, nNonce=2083236893, vtx=1)
CTransaction(hash=4a5e1e, ver=1, vin.size=1, vout.size=1, nLockTime=0)
CTxIn(COutPoint(000000, -1), coinbase 04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e2 06272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73)
CTxOut(nValue=50.00000000, scriptPubKey=0x5F1DF16B2B704C8A578D0B)
vMerkleTree: 4a5e1e
The [[hash]] of the genesis block, has two more leading hex zeroes than were required for an early block.

===Coinbase===
[[File:Jonny1000thetimes.png|thumb|300px|The Times 03/Jan/2009]]
The Genesis block is the first block in the blockchain.

All [[cryptocurrencies]] have a Genesis block, but the first bitcoin block is more special as it was the first one.

Each block created from the moment of the zero block can automatically track it as its ancestor by means of links with the previous blocks.

Here is the block header hash for the Genesis block:

000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f
The Genesis block contains a hidden message in the transaction: "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks".

This, of course, a note from Satoshi Nakamoto, has two functions:

* first, the designation of the time to create the first [[block]];

* secondly, the reference to the economic problems of the current government and the banking system.

===Genesis Block – Block reward===
The first 50 BTC [[Block Reward|block reward]] went to [[address]] ''1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa''
It is believed that other outputs sent to this address are spendable, but it is unknown if [[Satoshi]] Nakamoto has the [[private key]] for this particular address, if one existed at all.

===Timestamp===
Although the average time between Bitcoin [[blocks]] is 10 minutes, the timestamp of the next block is a full 6 days after the genesis block. One interpretation is that Satoshi was working on bitcoin for some time beforehand and the ''The Times'' front page prompted him to release it to the public. He then mined the genesis block with a timestamp in the past to match the headline. It is also possible that, since the block's hash is so low, he may have spent 6 days [[mining]] it with the same timestamp before proceeding to block 1. The prenet hypothesis suggests that the genesis block was solved on January 3, but the software was tested by [[Satoshi]] Nakamoto using that genesis block until January 9, when all the test blocks were deleted and the genesis block was reused for the main [[network]].

===Raw block data===
The [https://bitcointalk.org/index.php?topic=52706 raw hex version] of the Genesis block looks like:
00000000 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000020 00 00 00 00 3B A3 ED FD 7A 7B 12 B2 7A C7 2C 3E
00000030 67 76 8F 61 7F C8 1B C3 88 8A 51 32 3A 9F B8 AA
00000040 4B 1E 5E 4A 29 AB 5F 49 FF FF 00 1D 1D AC 2B 7C
00000050 01 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00
00000060 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000070 00 00 00 00 00 00 FF FF FF FF 4D 04 FF FF 00 1D
00000080 01 04 45 54 68 65 20 54 69 6D 65 73 20 30 33 2F
00000090 4A 61 6E 2F 32 30 30 39 20 43 68 61 6E 63 65 6C
000000A0 6C 6F 72 20 6F 6E 20 62 72 69 6E 6B 20 6F 66 20
000000B0 73 65 63 6F 6E 64 20 62 61 69 6C 6F 75 74 20 66
000000C0 6F 72 20 62 61 6E 6B 73 FF FF FF FF 01 00 F2 05
000000D0 2A 01 00 00 00 43 41 04 67 8A FD B0 FE 55 48 27
000000E0 19 67 F1 A6 71 30 B7 10 5C D6 A8 28 E0 39 09 A6
000000F0 79 62 E0 EA 1F 61 DE B6 49 F6 BC 3F 4C EF 38 C4
00000100 F3 55 04 E5 1E C1 12 DE 5C 38 4D F7 BA 0B 8D 57
00000110 8A 4C 70 2B 6B F1 1D 5F AC 00 00 00 00

Broken down it looks like this:

01000000 - version
0000000000000000000000000000000000000000000000000000000000000000 - prev block
3BA3EDFD7A7B12B27AC72C3E67768F617FC81BC3888A51323A9FB8AA4B1E5E4A - merkle root
29AB5F49 - timestamp
FFFF001D - bits
1DAC2B7C - nonce
01 - number of transactions
01000000 - version
01 - input
0000000000000000000000000000000000000000000000000000000000000000FFFFFFFF - prev output
4D - script length
04FFFF001D0104455468652054696D65732030332F4A616E2F32303039204368616E63656C6C6F72206F 6E206272696E6B206F66207365636F6E64206261696C6F757420666F722062616E6B73 - scriptsig
FFFFFFFF - sequence
01 - outputs
00F2052A01000000 - 50 BTC
43 - pk_script length
4104678AFDB0FE5548271967F1A67130B7105CD6A828E03909A67962E0EA1F61DEB649F6BC3F4CEF38 C4F35504E51EC112DE5C384DF7BA0B8D578A4C702B6BF11D5FAC - pk_script
00000000 - lock time

==External links==
* [http://bitcoin.stackexchange.com/questions/10009/why-can-t-the-genesis-block-coinbase-be-spent BitcoinStackExchange]
* [https://www.reddit.com/r/Bitcoin/comments/1nc13r/the_first_50btc_block_reward_cant_be_spend_why Reddit]

==See also==
* [[ICO listing]]
* [[ICO]]
* [[Token]]
* [[Smart contract]]
* [[Cloud mining]]

==References==
http://www.newyorker.com/magazine/2011/10/10/the-crypto-currency.

http://bitcoin.stackexchange.com/questions/10009/why-can-t-the-genesis-block-coinbase-be-spent

https://www.reddit.com/r/Bitcoin/comments/1nc13r/the_first_50btc_block_reward_cant_be_spend_why/

https://github.com/bitcoin/bitcoin/blob/9546a977d354b2ec6cd8455538e68fe4ba343a44/src/main.cpp#L1668

[[es:Bloque Génesis]]
[[Category:Technology]]
[[Category:Bitcoin history]]

Genesis block - Revision history

Admin: Created page with "{{#seo: |title=Genesis block – First block of Bitcoin or Altcoin – zaoniao Wiki |keywords=genesis block, block, bitcoin, block, zero, block 0, first |description=Genesis b..."