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Content - DIP4 - Add CbTx details

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thephez 2018-10-29 13:31:35 -04:00
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_includes/devdoc/ref_transactions.md
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@ -730,7 +730,67 @@ ProUpRevTx Payload
*Added in protocol version 70211 of Dash Core as described by DIP4*
Coinbase
The Coinbase (CbTx) special transaction adds information to the block’s coinbase
transaction that enables verification of the deterministic masternode list without
the full chain (e.g. from SPV clients). This allows light-clients to properly
verify InstantSend transactions and support additional deterministic masternode
list functionality in the future.
The special transaction type used for CbTx Transactions is 5 and the extra
payload consists of the following data:
| Bytes | Name | Data type | Description |
| ---------- | ----------- | -------- | -------- |
| 2 | version | uint_16 | CbTx version number. Currently set to 1.
| 4 | height | uint32_t | Height of the block
| 32 | merkleRootMNList | uint256 | Merkle root of the masternode list
The following annotated hexdump shows a CbTx transaction.
<!--devnet-DRA getrawtransaction 072b8eb47a87799a1242a8bd959a9c5eab93a346700d2f674420cfea70b2ed1c true-->
An itemized coinbase transaction:
{% highlight text %}
0300 ....................................... Version (3)
0500 ....................................... Type (5 - Coinbase)
01 ......................................... Number of inputs
| 00000000000000000000000000000000
| 00000000000000000000000000000000 ......... Previous outpoint TXID
| ffffffff ................................. Previous outpoint index
|
| 05 ....................................... Bytes in coinbase: 5
| |
| | 02 ..................................... Bytes in height
| | | 0608 ................................. Height: 2054
| |
| | 0101 ................................... Arbitrary data
| ffffffff ................................. Sequence
02 ......................................... Output count
| Transaction Output 1
| | 00902f5009000000 ....................... Duffs (400 DASH)
| | 2102c633b7022b4dab169c8a8459d83b7e0
| | 6e0f8da0f89bf7e788ec98c8038107989ac .... Script
|
| Transaction Output 2
| | 00e40b5402000000 ....................... Duffs (100 DASH)
| | 1976a914ebafa153cffbb5b37c30fb93
| | 886f2fe0f1d549ed88ac ................... P2PKH script
00000000 ................................... Locktime
26 ......................................... Extra payload size (38)
Coinbase Transaction Payload
| 0100 ..................................... Version (1)
|
| 06080000 ................................. Block height: 2054
|
| 69010fa8b729b53c78a1e209946c82e2
| 3159439022ea4055aa60d4393fffba46 ......... MN List merkle root
{% endhighlight %}
{% endautocrossref %}