<p>Blocks are usually sent using <a href="https://github.com/bitcoin/bips/blob/master/bip-0152.mediawiki" rel="nofollow noreferrer">BIP152</a>. This transmits blocks using an 80 byte header, 6 bytes per transation, plus the coinbase transaction.  To give a concrete example block 000000000000000000117f0033fd8cff18a9fa4601da7f93e6eb3e084caab586 took 16244 bytes to transmit.</p>

<p>If sending to a peer that doesn't already know the transactions (or not supporting BIP152) the node sends the raw block, which is half the size of the hex.  In the case of that block the raw block is 1,125,118 bytes long.</p>

CC BY-SA 4.0
2018-11-22T17:31:49.357Z
2018-11-22T17:31:49.357Z
G. Maxwell
<p>Neither, it's a binary format on the wire.</p>

<p>The 'hex' format is the same as the binary format, it just takes 2x the space. </p>

CC BY-SA 4.0
2018-11-22T15:52:51.440Z
2018-11-22T15:52:51.440Z
Claris
<p>This bitcoind JSON-RPC function attempts to submit a new block to the network:</p>

<p><a href="https://bitcoincore.org/en/doc/0.16.0/rpc/mining/submitblock/" rel="nofollow noreferrer">https://bitcoincore.org/en/doc/0.16.0/rpc/mining/submitblock/</a></p>

CC BY-SA 3.0
2018-03-11T12:45:20.400Z
Is that correct?  {"id": 0, "method": "submitblock", "params": [
"00000020a15e218f5f158a31053ea101b917a6113c807f6bcd......", # header block
"01000000010000000000000000000000000000000000000000......" #coinbase
]}')
asd2791
CC BY-SA 4.0
2018-03-10T20:39:31.820Z
2018-06-12T20:33:11.130Z
2018-06-12T20:33:11.130Z
Corbin
<p>How do miners send blocks to network peers?</p>

<p>in array json format, Thus:</p>

<pre><code>{
"hash":"000000000000000000a7b4999c723ed9f308425708577c76827ade51062e135a",
"ver":536870912,
"prev_block":"0000000000000000005ac8cd6b7f803c11a617b901a13e05318a155f8f215ea1",
"mrkl_root":"48915d048e3f3a8c19d3ab81ebdfc16278cd665637770305ae2e3cb2eaf97ccc",
"time":1512192330,
"bits":402706678,
"fee":0,
"nonce":2321456741,
"n_tx":1,
"size":266,
"block_index":1648336,
"main_chain":true,
"height":497152,
"received_time":1512192330,
"relayed_by":"0.0.0.0",
 "tx":[

 { "ver":1,
  "inputs":[
     {
        "sequence":1663,
        "witness":"",





 "script":   "030096072cfabe6d6d08d1c2f6d904f4e1cd10c6558f8e5aed5d6a89c43bb22862464ebb819dd8813404000000f09f909f104d696e6564206279206a6f73656d737200000000000000000000000000000000000000000000000000000000000000000000"
  }
   ],
  "weight":740,
  "relayed_by":"0.0.0.0",
   "out":[
    {
     "addr_tag_link":"https:\/\/www.f2pool.com",
     "addr_tag":"Discus Fish (F2Pool)",
     "spent":true,
     "tx_index":307162790,
     "type":0,
     "addr":"1KFHE7w8BhaENAswwryaoccDb6qcT6DbYY",
     "value":1250000000,
     "n":0,
          "script":"76a914c825a1ecf2a6830c4401620c3a16f1995057c2ab88ac"
  }
   ],
   "lock_time":953150447,
  "size":185,
   "rbf":true,
  "time":1512192330,
   "tx_index":307162790,
   "vin_sz":1,
  "hash":      "48915d048e3f3a8c19d3ab81ebdfc16278cd665637770305ae2e3cb2eaf97ccc",
   "vout_sz":1
 }]
 }
</code></pre>

<p>or hex format, Thus: </p>

<pre><code>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
</code></pre>

<bitcoin-core><bitcoind><mining-pools>
How do miners send blocks to network peers?
asd2791
# How do miners send blocks to network peers?

(Asked by: username_0 on 2018-03-10)

How do miners send blocks to network peers?

in array json format, Thus:

```
{
"hash":"000000000000000000a7b4999c723ed9f308425708577c76827ade51062e135a",
"ver":536870912,
"prev_block":"0000000000000000005ac8cd6b7f803c11a617b901a13e05318a155f8f215ea1",
"mrkl_root":"48915d048e3f3a8c19d3ab81ebdfc16278cd665637770305ae2e3cb2eaf97ccc",
"time":1512192330,
"bits":402706678,
"fee":0,
"nonce":2321456741,
"n_tx":1,
"size":266,
"block_index":1648336,
"main_chain":true,
"height":497152,
"received_time":1512192330,
"relayed_by":"0.0.0.0",
 "tx":[

 { "ver":1,
  "inputs":[
     {
        "sequence":1663,
        "witness":"",

 "script":   "030096072cfabe6d6d08d1c2f6d904f4e1cd10c6558f8e5aed5d6a89c43bb22862464ebb819dd8813404000000f09f909f104d696e6564206279206a6f73656d737200000000000000000000000000000000000000000000000000000000000000000000"
  }
   ],
  "weight":740,
  "relayed_by":"0.0.0.0",
   "out":[
    {
     "addr_tag_link":"https:\/\/www.f2pool.com",
     "addr_tag":"Discus Fish (F2Pool)",
     "spent":true,
     "tx_index":307162790,
     "type":0,
     "addr":"1KFHE7w8BhaENAswwryaoccDb6qcT6DbYY",
     "value":1250000000,
     "n":0,
          "script":"76a914c825a1ecf2a6830c4401620c3a16f1995057c2ab88ac"
  }
   ],
   "lock_time":953150447,
  "size":185,
   "rbf":true,
  "time":1512192330,
   "tx_index":307162790,
   "vin_sz":1,
  "hash":      "48915d048e3f3a8c19d3ab81ebdfc16278cd665637770305ae2e3cb2eaf97ccc",
   "vout_sz":1
 }]
 }

```

or hex format, Thus:

```
00000020a15e218f5f158a31053ea101b917a6113c807f6bcdc85a000000000000000000cc7cf9eab23c2eae050377375666cd7862c1dfeb81abd3198c3a3f8e045d91484a39225af6d00018659e5e8a0101000000010000000000000000000000000000000000000000000000000000000000000000ffffffff64030096072cfabe6d6d08d1c2f6d904f4e1cd10c6558f8e5aed5d6a89c43bb22862464ebb819dd8813404000000f09f909f104d696e6564206279206a6f73656d7372000000000000000000000000000000000000000000000000000000000000000000007f06000001807c814a000000001976a914c825a1ecf2a6830c4401620c3a16f1995057c2ab88acefebcf38

```

**Tags:** bitcoin-core, bitcoind, mining-pools


---

## 3 answers

### Answer by username_1 on 2018-11-22. Score: 2

Blocks are usually sent using [BIP152](https://github.com/bitcoin/bips/blob/master/bip-0152.mediawiki). This transmits blocks using an 80 byte header, 6 bytes per transation, plus the coinbase transaction. To give a concrete example block 000000000000000000117f0033fd8cff18a9fa4601da7f93e6eb3e084caab586 took 16244 bytes to transmit.

If sending to a peer that doesn't already know the transactions (or not supporting BIP152) the node sends the raw block, which is half the size of the hex. In the case of that block the raw block is 1,125,118 bytes long.


---

### Answer by username_2 on 2018-11-22. Score: 0

Neither, it's a binary format on the wire.

The 'hex' format is the same as the binary format, it just takes 2x the space.


---

### Answer by username_3 on 2018-03-10. Score: -1

This bitcoind JSON-RPC function attempts to submit a new block to the network:

<https://bitcoincore.org/en/doc/0.16.0/rpc/mining/submitblock/>

> **Comments:**
> **username_0**: Is that correct?  {"id": 0, "method": "submitblock", "params": [ "00000020a15e218f5f158a31053ea101b917a6113c807f6bcd......", # header block "01000000010000000000000000000000000000000000000000......" #coinbase ]}')  

---

