How do you create a 'wallet' that has getChangeAddress()? about coinselect HOT 8 CLOSED

I believe it's implying that you should set the output.address to the wallet address you want to get the change for.

from coinselect.

I'll update this example to be more complete in future; and will use the new bip32 module.

Traditionally, getChangeAddress will simply be a wrapper around

bip32.fromSeed(seed).derivePath(`m/0'/1'/${k}`).getAddress()

or some other path, where k is the offset into that account, and k should increment by 1 for each output.address.

from coinselect.

@rbndg you can do whatever you like.
I can only recommend that you keep backups of any private keys you generate 😝 - but even then, up to you!

from coinselect.

Thanks for the quick reply @dcousens, If I can ask for a bit more help. I've been trying to implement this, it looks like bip32.fromSeed() is so new, it hasn't made it into any bip32 releases?

I tried adding the package directly from master but it looks like master is also missing a file: let ecc = require('./ecc').

It might be too bleeding edge for my purposes, how was this accomplished before the new bip32 module?

from coinselect.

Apologies, yes that module is not ready yet, but it will be where you want to look in about a months time.

For now, see
https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/src/hdnode.js#L31

bitcoinjs.HDNode.fromSeedBuffer(seed).derivePath(`m/0'/1'/${k}`).getAddress()

from coinselect.

@dcousens is it incorrect to set any bitcoin address as the changeAddress or do we have to use deterministic wallet?

from coinselect.

Yeah, dealing with deterministic wallets seeds is much better 😊

from coinselect.

thanks @rbndg works like a charm! 😁

from coinselect.