How can unique addresses be allocated to different users?

achow101

staff

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Just writing some code

Quote from: vicktor on January 11, 2017, 11:30:59 AM

we are using mycelium gear wallet where we r allowed to generate only 1000 address through a single xpub key.
Is there any hdwallet which generate infinite keys?

Any desktop wallet software supporting BIP 32 will allow you to generate keys until you run out of disk space.

vicktor

newbie

Activity: 53

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Quote from: achow101 on January 11, 2017, 01:28:51 AM

Quote from: vicktor on January 11, 2017, 01:23:53 AM

how many derived keys can form through a single xpub key?

As many as you want, basically infinitely many keys can be derived.

we are using mycelium gear wallet where we r allowed to generate only 1000 address through a single xpub key.
Is there any hdwallet which generate infinite keys?

Digitalbitcoin

hero member

Activity: 1568

Merit: 502

Actually unique address with its control can be handle by any service provider can offer same Bitcoin address to their user to receive BTC. But its something fishy. As most of wallet service provider generate new bitcoin wallet address for user for more security and safety.

And if you are a service provider then it may create certain trouble for offer unique address to many user, because of accounting.

achow101

staff

Activity: 3458

Merit: 6793

Just writing some code

Quote from: vicktor on January 11, 2017, 01:23:53 AM

how many derived keys can form through a single xpub key?

As many as you want, basically infinitely many keys can be derived.

vicktor

newbie

Activity: 53

Merit: 0

Quote from: mocacinno on January 10, 2017, 10:45:41 AM

Quote from: vicktor on January 10, 2017, 10:32:53 AM

Quote from: vicktor on January 04, 2017, 01:13:08 AM

Is it better to pre-generate these addresses or dynamically generate them for each user?
I know basics of how the wallets generate multiple addresses through X-public key. I need to generate around 5000 keys.

can i bind or implement this process with Trezor?

you should be able to export the xpub from your trezor, the xpub can be used to generate derived keys/address either in realtime or beforehand.

how many derived keys can form through a single xpub key?

mocacinno

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https://merel.mobi => buy facemasks with BTC/LTC

Quote from: vicktor on January 10, 2017, 10:32:53 AM

Quote from: vicktor on January 04, 2017, 01:13:08 AM

Is it better to pre-generate these addresses or dynamically generate them for each user?
I know basics of how the wallets generate multiple addresses through X-public key. I need to generate around 5000 keys.

can i bind or implement this process with Trezor?

you should be able to export the xpub from your trezor, the xpub can be used to generate derived keys/address either in realtime or beforehand.

vicktor

newbie

Activity: 53

Merit: 0

Quote from: vicktor on January 04, 2017, 01:13:08 AM

Is it better to pre-generate these addresses or dynamically generate them for each user?
I know basics of how the wallets generate multiple addresses through X-public key. I need to generate around 5000 keys.

can i bind or implement this process with Trezor?

vicktor

newbie

Activity: 53

Merit: 0

Quote from: mocacinno on January 09, 2017, 10:35:27 AM

I've written a small python script to derive addresses for a user on this forum in the past:
https://bitcointalksearch.org/topic/m.17028536

Since he payed me a bounty when i PM'ed him the final version, i cannot give you the final result (we didn't discuss if the script was free for the public, or private), but the theory on how to do this easily is all on this page Wink

If you use this script, and run into any troubles, let me know, i'll keep an eye on this thread

Thanks a lot.I saw that code,fairly get the logic.Since i am using different language for development,i tried first by myself and if any query come i let u know.

mocacinno

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Activity: 3514

Merit: 5123

https://merel.mobi => buy facemasks with BTC/LTC

I've written a small python script to derive addresses for a user on this forum in the past:
https://bitcointalksearch.org/topic/m.17028536

Since he payed me a bounty when i PM'ed him the final version, i cannot give you the final result (we didn't discuss if the script was free for the public, or private), but the theory on how to do this easily is all on this page Wink

If you use this script, and run into any troubles, let me know, i'll keep an eye on this thread

vicktor

newbie

Activity: 53

Merit: 0

Quote from: Velkro on January 06, 2017, 10:29:04 AM

Quote from: vicktor on January 04, 2017, 01:13:08 AM

Is it better to pre-generate these addresses or dynamically generate them for each user?
I know basics of how the wallets generate multiple addresses through X-public key. I need to generate around 5000 keys.

There are many websites that can do that for you. Some risk is involved here.
Best would be to write a script that will do that for you. If you lack technical knowledge, try to find site you can trust that works offline.

trust is a major factor for me, so i prefer scripting rather than third party websites

Velkro

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Quote from: vicktor on January 04, 2017, 01:13:08 AM

Is it better to pre-generate these addresses or dynamically generate them for each user?
I know basics of how the wallets generate multiple addresses through X-public key. I need to generate around 5000 keys.

There are many websites that can do that for you. Some risk is involved here.
Best would be to write a script that will do that for you. If you lack technical knowledge, try to find site you can trust that works offline.

vicktor

newbie

Activity: 53

Merit: 0

thanks for your help, i get back if any other query come.

devans

sr. member

Activity: 528

Merit: 368

Quote from: vicktor on January 05, 2017, 08:47:03 AM

How would i generate address dynamically at user side? Because I don't want to share my public key with User.

The client would only receive the generated address, not the extended key from which it was derived. Neither should the client be concerned with how the address was generated.

So whenever a client requests its deposit address from your service, e.g. by visiting a web page or calling an API endpoint, your service looks up or generates the address and returns it to the client.

vicktor

newbie

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How would i generate address dynamically at user side? Because I don't want to share my public key with User.

devans

sr. member

Activity: 528

Merit: 368

I recommend generating them on demand, i.e. whenever a client requests a deposit address, but deterministically. The reasoning for this is that there is no point in storing or monitoring addresses that cannot possibly have received a deposit yet.

For example you could use the derivation path m/u/i, where u is the user's ID and i is a counter that gets incremented whenever the previous address is used. This gives you an infinite supply (practically speaking) of unique deposit addresses for every user.

vicktor

newbie

Activity: 53

Merit: 0

Is it better to pre-generate these addresses or dynamically generate them for each user?
I know basics of how the wallets generate multiple addresses through X-public key. I need to generate around 5000 keys.

Topic: How can unique addresses be allocated to different users? (Read 938 times)