==== BIP 0034 - Block v2, Height in Coinbase (soft fork)  ====
[[dido:public:ra:xapend:xapend.b_stds:defact:bitcoin:bips| return to the Bitcoin Improvement Proposals ]]

<table>
<caption>Data sheet for Block v2, Height in Coinbase  </caption>
| Title                      | Block v2, Height in Coinbase  |
| Layer                      | Consensus (soft fork) |
| Author                     | Gavin Andresen	 |
| Comments-Summary           | No comments yet. |
| Comments-URI               | [[https://github.com/bitcoin/bips/wiki/Comments:BIP-0034]]    |
| Status                     | Final | 
| Type                       | Standards Track | 
| Created                    | 2012-07-06  |
| Post History               |  |
| Description                | [[https://github.com/bitcoin/bips/blob/master/bip-0034.mediawiki]] |
</table>

  : **Note**: The following is an excerpt from the official [[dido:public:ra:xapend:xapend.a_glossary:b:bitcoin|Bitcoin]] site. It is provided here as a convenience and is not authoritative. Refer to the original document(s) as the authoritative reference.

=== Abstract ===
  : //Bitcoin blocks and transactions are versioned binary structures. Both currently use version 1. This BIP introduces an upgrade path for versioned transactions and blocks. A unique value is added to newly produced coinbase transactions, and blocks are updated to version 2.//

=== Motivation ===
  : //1. Clarify and exercise the mechanism whereby the bitcoin network collectively consents to upgrade transaction or block binary structures, rules and behaviors//
  : //2. Enforce block and transaction uniqueness, and assist unconnected block [[dido:public:ra:xapend:xapend.a_glossary:v:validation|validation]]//