start a new blockchain

[mchliu]

請問 @iblis17 大大
目標是要建一個新的區塊鏈
聽你說目前是會連到原本的區塊鏈

所以我們要建一個新的是要把網路斷掉嗎?

阿實際該如何執行哩

[iblislin]

我估計要修改 zmq 這塊的 code

1. ZMQ is a third-party lib. So try to figure out the conecpt of zmq first.
2. Read some ZMQ API sample.
3. Start to find out how bitcoin using ZMQ. Find out where is the API call in this bitcoin repo.

[iblislin]

Sorry for eng message. My IME is broken on this machine

[iblislin]

I guess here is a good start point:
https://github.com/APCLab/bitcoin/blob/master/src/net.cpp

[mchliu]

NVM
LET ME SEE SEE

[hychang23]

@iblis17 你的意思是說看完這份嗎?還是說要找什麼東西

[iblislin]

@HuaYang-Chang
Please figure out the following question.
There is lots of API in net.cpp. Do not read the implementation first. Just show me:

1. Which files are using net.hpp? Just show me a list of file name.
2. Which api from net.hpp is invoked? Please show the chain of invoking.

Do NOT read the implementation, now, we only need to understand the architecture.

@HuaYang-Chang I guess 5 hr is enough for drawing this big picture. Doxygen may help you. Can you make it?

[mchliu]

@iblis17 我們找到了
在doxygen上都有
要全列出來嗎?
還是要接下一個任務了

[hychang23]

https://dev.visucore.com/bitcoin/doxygen/net_8h.html#a13f289d6233bd32b78a38793f76bdccb

[iblislin]

OK, I figured out it already:
The machinery is here: https://bitcoin.org/en/developer-guide#peer-discovery

The hard-coded DNS seed is here: https://github.com/bitcoin/bitcoin/blob/d612837814020ae832499d18e6ee5eb919a87907/src/chainparams.cpp#L117-L122.

Also found some doc about dns seed operators: https://github.com/bitcoin/bitcoin/blob/a6a860796a44a2805a58391a009ba22752f64e32/doc/dnsseed-policy.md

In order to build our own network, we can simply bypass the bootstrapping via DNS. We do not need DNS, we only need to provide a hard-coded peers.dat (this file is a BDB file). And bitcoin core will load the peers from it.

@mchliu So now please fetch a normal peers.dat from bitcoin network first. Exam the BDB file, then create a custom one for us.

[mchliu]

@iblis17 It's kind of hard for us to understand what u're saying although u said it cleary.

We don't really understand the whole structure of this whole network, so we can't understand what all these information that u mentioned is about, including what DNS seed is and what it's for.

Do u mind telling us its brief ideas? Or we can also try ask google some question.

[iblislin]

@mchliu The description on developer wiki (the link is previous mentioned) is quite clear already. Please try to understand it first.
I think it already provide enough info about connection to peers.

After reading it, we tell me how to make bitcoin core connect to our own peer based on the machinery the wiki revealed to you.

[mchliu]

@iblis17
喔就把連的節點換掉阿^^

就 RPC getpeerinfo 不是會看到是連那些節點

就在code裡換成你想連的，都不連就變自己一條blockchain

[mchliu]

@iblis17
我去問了一下我同學他是JOHN說

[iblislin]

@mchliu 對啊

@mchliu 我看不懂你後面那篇回覆

[mchliu]

@iblis17 下面那則不重要啦哈
所以我們有需要改變方針嗎
還是繼續照你說的研究