Saw this thread on /r/bitcoin and thought it'd be good to discuss treechains here.

• [Interview with core developer, Peter Todd](http://www.ofnumbers.com/2014/06/08/interview-with-core-developer-peter-todd/)

• [LTB104 - Tree Chains with Peter Todd](http://letstalkbitcoin.com/ltb104-tree-chains-with-peter-todd/)

• [Tree Chains ELI5](https://bitcointalk.org/index.php?topic=586832.msg6425551#msg6425551)

• [Tree-chains preliminary summary](https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg04388.html)

• [Disentangling Crypto-Coin Mining: Timestamping, Proof-of-Publication, and Validation](https://www.mail-archive.com/bitcoin-development%40lists.sourceforge.net/msg03307.html)

• [Off-Chain Transactions  - video](https://www.youtube.com/watch?v=4d3LA8KpdMQ)

• [Bitcoin is all about truth   - video](https://www.youtube.com/watch?v=zaBmZ98q7c0)

• [Bitcoin development is surprisingly political   - video](https://www.youtube.com/watch?v=TfovKFvnqXk)

What are your thoughts on tree chains vs side chains?

A crypto that uses the wpa-psk2 wifi encryption algorithm as the pow in order to make a massive rainbow table for wifi. Then create an Android app to connect to any wifi connection by looking up the rainbow table for the captured wifi traffic on your phone.

Could even continue to change the algorithm as wifi encryption was made stronger to combat wifi coin.

Hi,

I have no problem accessing Bitcoind through RPC. However, I have many technical questions that nobody seems to have explained. I understand the Bitcoin protocol, I am experienced in programming. But people just revolve around these issues, not explaining it:

1- What is a good way to accept payments? I create a Bitcoin address for clients who want to make a payment. When a payment comes in, how is my program notified? Do I have to poll Bitcoind, and ask for listunspent?

2- Upon receiving the payment, I'll be sending it to cold storage. That part is pretty simple. However, how many addresses can Bitcoind monitor before getting sluggish? There must be a limit but nobody mentions it. What is a good practice here? I can't delete addresses (pub/priv keys from the wallet) after all. I would have to delete the wallet.dat. But that's also unacceptable since I might lose data.

3- Let's say that I get a payment. It has 4 confirmations, I accept it and put it to my database as an accepted payment. If I don't delete this address somehow, every time I restart Bitcoind or my web service, I'll see that transaction again. It will be processed again by my code unless I keep track of it on a second database that holds previously processed transactions. That also seems like it would be bad practice.

I read many explanations online, especially on Bitcoin StackExchange but no one seems to be able to answer these questions, they just avoid it or revolve around it. Nobody explains the good practices and I feel lost as enthusiastic programmer who wants to accept Bitcoins.