How do I use it?Simple. Type in a passphrase into the "Passphrase" box and tweak the value in "Keypair index". The generated keys are shown at the bottom of the page, along with a Bitcoin address you can send coins to.
In order to spend, copy the "Derived private key", change the button at the top of the page to "BIP32 Key" and paste in the key you just copied. Now copy the "Key" in the Key Info section. This is the Bitcoin private key, and it can be used to spend by using the transaction generator at
http://brainwallet.org/ Where is the "Keypair index"? You wrote: "...paste in the key you just copied." Paste it where? Most of the fields cannot be pasted into.
More advanced users can use the site to do the following things:
It seems that this is already for more advanced users.
I just want to enable my users to send and withdraw bitcoin. I'm trying to see if the approach suggested by just_someguy at
https://bitcointalk.org/index.php?topic=22368.msg5058875#msg5058875 is the way to go. I've already spent 2 months to see if I can integrate Bitcoin to my web app. Do I need to understand cryptography, Depth, Parent Fingerprint, Child Index, Chain Code, Derivation Path, Derived Private Key, Private Key (WIF), Derived Public Key, Public Key (Hex), XXpv/XXub, base58_decode, magic bytes, encode, DOGE, Ltpv, Ltub, dgpv, dgub, etc. in order to do so?