<h2>The diagram is wrong</h2>
<p>The data in the gap between the two brackets is the count of transactions and most of the first coinbase transaction.</p>
<p>The start/top of the second bracket is positioned incorrectly.</p>
<hr />
<h2>Various components of a raw block</h2>
<p>The image is of bitcoin block 170 with Block ID <code>00000000d1145790a8694403d4063f323d499e655c83426834d4ce2f8dd4a2ee</code></p>
<p>The block header is, as your image shows,<br />
<code>0100000055bd840a</code> <code>78798ad0da853f68</code> <code>974f3d183e2bd1db</code> <code>6a842c1feecf222a</code> <code>00000000ff104ccb</code> <code>05421ab93e63f8c3</code> <code>ce5c2c2e9dbb37de</code> <code>2764b3a3175c8166</code> <code>562cac7d51b96a49</code> <code>ffff001d283e9e70</code></p>
<p>Which can be <a href="https://en.bitcoin.it/wiki/Protocol_documentation#block" rel="nofollow noreferrer">explained</a> as</p>
<div class="s-table-container">
<table class="s-table">
<thead>
<tr>
<th>hex data</th>
<th>meaning</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>01000000</code></td>
<td>version=1</td>
</tr>
<tr>
<td><code>55bd840a78798ad0</code> <code>da853f68974f3d18</code> <code>3e2bd1db6a842c1f</code> <code>eecf222a00000000</code></td>
<td>hash of prior block (i.e. ID of prior block)</td>
</tr>
<tr>
<td><code>ff104ccb05421ab9</code> <code>3e63f8c3ce5c2c2e</code> <code>9dbb37de2764b3a3</code> <code>175c8166562cac7d</code></td>
<td>merkle root</td>
</tr>
<tr>
<td><code>51b96a49</code></td>
<td>timestamp</td>
</tr>
<tr>
<td><code>ffff001d</code></td>
<td>bits (target)</td>
</tr>
<tr>
<td><code>283e9e70</code></td>
<td>nonce</td>
</tr>
</tbody>
</table>
</div>
<p>the <code>02</code> following the header tells us the block contains two transactions</p>
<p>The first is the coinbase transaction with TXID <code>b1fea52486ce0c62bb442b530a3f0132b826c74e473d1f2c220bfa78111c5082</code></p>
<p>Its raw data is<br />
<code>0100000001000000</code> <code>0000000000000000</code> <code>0000000000000000</code> <code>0000000000000000</code> <code>0000000000ffffff</code> <code>ff0704ffff001d01</code> <code>02ffffffff0100f2</code> <code>052a010000004341</code> <code>04d46c4968bde028</code> <code>99d2aa0963367c7a</code> <code>6ce34eec332b32e4</code> <code>2e5f3407e052d64a</code> <code>c625da6f0718e7b3</code> <code>02140434bd725706</code> <code>957c092db53805b8</code> <code>21a85b23a7ac6172</code> <code>5bac00000000</code></p>
<p>The second is a transaction with TXID
<code>f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16</code></p>
<p>Its raw data is<br />
<code>0100000001c997a5</code> <code>e56e104102fa209c</code> <code>6a852dd90660a20b</code> <code>2d9c352423edce25</code> <code>857fcd3704000000</code> <code>004847304402204e</code> <code>45e16932b8af5149</code> <code>61a1d3a1a25fdf3f</code> <code>4f7732e9d624c6c6</code> <code>1548ab5fb8cd4102</code> <code>20181522ec8eca07</code> <code>de4860a4acdd1290</code> <code>9d831cc56cbbac46</code> <code>22082221a8768d1d</code> <code>0901ffffffff0200</code> <code>ca9a3b0000000043</code> <code>4104ae1a62fe09c5</code> <code>f51b13905f07f06b</code> <code>99a2f7159b2225f3</code> <code>74cd378d71302fa2</code> <code>8414e7aab37397f5</code> <code>54a7df5f142c21c1</code> <code>b7303b8a0626f1ba</code> <code>ded5c72a704f7e6c</code> <code>d84cac00286bee00</code> <code>00000043410411db</code> <code>93e1dcdb8a016b49</code> <code>840f8c53bc1eb68a</code> <code>382e97b1482ecad7</code> <code>b148a6909a5cb2e0</code> <code>eaddfb84ccf97444</code> <code>64f82e160bfa9b8b</code> <code>64f9d4c03f999b86</code> <code>43f656b412a3ac00</code> <code>000000</code></p>
<p>The components of the specific transaction hex above are explained in detail in the first link below.</p>
<hr />
<p>Related:</p>
<ul>
<li><a href="https://bitcoin.stackexchange.com/q/113631/13866">In what format does a block store the transaction data?</a></li>
<li><a href="https://bitcoin.stackexchange.com/q/113697/13866">What are the parts of a Bitcoin transaction in segwit format?</a></li>
</ul>

CC BY-SA 4.0
2022-06-16T13:16:50.710Z
2023-10-03T10:52:29.337Z
2023-10-03T10:52:29.337Z
RedGrittyBrick
<p><a href="https://i.sstatic.net/I50pk.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/I50pk.jpg" alt="enter image description here" /></a></p>
<p>I'm wondering what the portion between the block header and the transaction data (the un-annotated section) is. I can't seem to find any information on it.</p>

<block><block-header>
What are the components of the raw block shown in this image?
Jamo
# What are the components of the raw block shown in this image?

(Asked by: username_0 on 2022-06-16)

[![enter image description here](https://i.sstatic.net/I50pk.jpg)](https://i.sstatic.net/I50pk.jpg)

I'm wondering what the portion between the block header and the transaction data (the un-annotated section) is. I can't seem to find any information on it.

**Tags:** block, block-header


---

## 1 answers

### Answer by username_1 on 2022-06-16. Score: 7 | Accepted answer

## The diagram is wrong

The data in the gap between the two brackets is the count of transactions and most of the first coinbase transaction.

The start/top of the second bracket is positioned incorrectly.

---

## Various components of a raw block

The image is of bitcoin block 170 with Block ID `00000000d1145790a8694403d4063f323d499e655c83426834d4ce2f8dd4a2ee`

The block header is, as your image shows,  
`0100000055bd840a` `78798ad0da853f68` `974f3d183e2bd1db` `6a842c1feecf222a` `00000000ff104ccb` `05421ab93e63f8c3` `ce5c2c2e9dbb37de` `2764b3a3175c8166` `562cac7d51b96a49` `ffff001d283e9e70`

Which can be [explained](https://en.bitcoin.it/wiki/Protocol_documentation#block) as

| hex data | meaning |
| --- | --- |
| `01000000` | version=1 |
| `55bd840a78798ad0` `da853f68974f3d18` `3e2bd1db6a842c1f` `eecf222a00000000` | hash of prior block (i.e. ID of prior block) |
| `ff104ccb05421ab9` `3e63f8c3ce5c2c2e` `9dbb37de2764b3a3` `175c8166562cac7d` | merkle root |
| `51b96a49` | timestamp |
| `ffff001d` | bits (target) |
| `283e9e70` | nonce |

the `02` following the header tells us the block contains two transactions

The first is the coinbase transaction with TXID `b1fea52486ce0c62bb442b530a3f0132b826c74e473d1f2c220bfa78111c5082`

Its raw data is  
`0100000001000000` `0000000000000000` `0000000000000000` `0000000000000000` `0000000000ffffff` `ff0704ffff001d01` `02ffffffff0100f2` `052a010000004341` `04d46c4968bde028` `99d2aa0963367c7a` `6ce34eec332b32e4` `2e5f3407e052d64a` `c625da6f0718e7b3` `02140434bd725706` `957c092db53805b8` `21a85b23a7ac6172` `5bac00000000`

The second is a transaction with TXID
`f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16`

Its raw data is  
`0100000001c997a5` `e56e104102fa209c` `6a852dd90660a20b` `2d9c352423edce25` `857fcd3704000000` `004847304402204e` `45e16932b8af5149` `61a1d3a1a25fdf3f` `4f7732e9d624c6c6` `1548ab5fb8cd4102` `20181522ec8eca07` `de4860a4acdd1290` `9d831cc56cbbac46` `22082221a8768d1d` `0901ffffffff0200` `ca9a3b0000000043` `4104ae1a62fe09c5` `f51b13905f07f06b` `99a2f7159b2225f3` `74cd378d71302fa2` `8414e7aab37397f5` `54a7df5f142c21c1` `b7303b8a0626f1ba` `ded5c72a704f7e6c` `d84cac00286bee00` `00000043410411db` `93e1dcdb8a016b49` `840f8c53bc1eb68a` `382e97b1482ecad7` `b148a6909a5cb2e0` `eaddfb84ccf97444` `64f82e160bfa9b8b` `64f9d4c03f999b86` `43f656b412a3ac00` `000000`

The components of the specific transaction hex above are explained in detail in the first link below.

---

Related:

* [In what format does a block store the transaction data?](https://bitcoin.stackexchange.com/q/113631/13866)
* [What are the parts of a Bitcoin transaction in segwit format?](https://bitcoin.stackexchange.com/q/113697/13866)


---

