[coinb.in] Open Source, Multi Signature, HD Wallet, SegWit/Bech32 and more!

[Dabs]

Mr. OutCast3k,

I have a question, but it is more of a general question that is just indirectly related to coinb.in.

Can I add a multisignature address to bitcoin core? Can I then add the private keys (assuming I have them of course) and do a spend using that wallet?

For example, I create a 2-of-3 address. Let's make a more concrete example and I'll use your page to do it:

I first generate 3 regular addresses, public keys, and private keys:

1P6xdHExqRusJ8hM4vpTjuDnum4Crxoxb8
03d6a0edc630c29f649500d592091039d7f3c942ec07bb7ebdabfe5727c58964fd
KwyKy7C7f8pHw1GizvWhLpE6GB13ZcfNJoX98MHiwwz1x77MksQq

1Eom4fsSnmka311BbJrmUjyY29tsQcrTyD
0305143caa81bc0fec9237f594939d0ceb667cb78e451264e8d2a677648a871aeb
Kyw4KDi8Lre2WhpTJt8p8gfTEkpSfqVv8dv3bJ75cmuyvFHQ7HBy

1Ceidy7FSL8Vzrqg5SfzUpEqDwmPB9Drfo
0306c73d2aea0a492e268dd1b3ed1ba1bbdc54c1d4a3a46d9d74fe81f3e6a301af
KxbsQxm5Q8pGXPs8AWP7Lt1SkzFrvgZr2EdKpB9WTFCkC4cdnK3V

Then I input the above public keys in that order (and order seems to affect the result) and come up with the following:

Address
3NUEUQspbf9LK3mRN13pLNyzeEK4Ep1HRC

Redeem Script
522103d6a0edc630c29f649500d592091039d7f3c942ec07bb7ebdabfe5727c58964fd210305143 caa81bc0fec9237f594939d0ceb667cb78e451264e8d2a677648a871aeb210306c73d2aea0a492e 268dd1b3ed1ba1bbdc54c1d4a3a46d9d74fe81f3e6a301af53ae

Does bitcoin core (currently version 0.12.1) not work if I import the 3 private keys? Or it won't know what to do? That then leaves me with the option of using your site.

Actually, I'm looking for a way to do this with thousands of addresses (all of them multi-sig). The big wallet guys and exchanges have already done this, but I don't know if their code is open (I haven't checked.) Ideally, there would be 2 or 3 different physical machines with 2 cold offline airgapped, but for testing purposes it will be just one.

[1714772917]

1714772917

[1714772917]

1714772917

[Serge V.]

Can I add a multisignature address to bitcoin core? Can I then add the private keys (assuming I have them of course) and do a spend using that wallet?

To add a 2-of-3 MustiSig address to bitcoin core you will need to execute in client console the following command (in your example):

Code:

addmultisigaddress 2 '["03d6a0edc630c29f649500d592091039d7f3c942ec07bb7ebdabfe5727c58964fd","0305143caa81bc0fec9237f594939d0ceb667cb78e451264e8d2a677648a871aeb","0306c73d2aea0a492e268dd1b3ed1ba1bbdc54c1d4a3a46d9d74fe81f3e6a301af"]'

Result:

Code:

3NUEUQspbf9LK3mRN13pLNyzeEK4Ep1HRC

In order to spend the funds from the MultiSig address you will need to import 2 of 3 private keys that correspond to these public keys:

Code:

importprivkey KwyKy7C7f8pHw1GizvWhLpE6GB13ZcfNJoX98MHiwwz1x77MksQq

Code:

importprivkey Kyw4KDi8Lre2WhpTJt8p8gfTEkpSfqVv8dv3bJ75cmuyvFHQ7HBy

[HostFat]

@OutCast3k
Can you add an easy way to cut the fee from the sending amount, instead of the local balance.

If I send 0.1 BTC to someone with 0.00001 fee, and he asks a faster transaction, I should be able to easily change the sending amount, example: 0.0999 BTC and 0.0001 fee.

He is the one that need a faster tx, not me, so he is he one that need to pay for it.

[idev]

Is there a testnet version available somewhere ?

[Financisto]

Is there a testnet version available somewhere ?

This forked version implemented it:

https://ttutdxh-nubits.github.io/cointoolkit

[idev]

Is there a testnet version available somewhere ?

This forked version implemented it:

https://ttutdxh-nubits.github.io

Edit: You missed typed the full URL https://ttutdxh-nubits.github.io/cointoolkit

But thanks for putting me on the right track

Bitcoin Testnet version does not seem to work, it's not recognizing my pub keys when i submit them to create a multisig address.

[Financisto]

Yes. Thanks for telling me that.

Now it's correct.

Cheers!

[HostFat]

@OutCast3k
Will you also add the support for CSV?

[Dabs]

Question: Bitcoin Core allows addmultisigaddress nrequired ["key",...] ... where each key is a Bitcoin address or hex-encoded public key.

What's the difference or concern or problem or whatever reason for using a Bitcoin address and the hex-encoded public key?

I'll take a guess: you can't add using the Bitcoin address if you don't already have the private key in your wallet?

[ttg43]

This wallet is easy and secure. Strongly recommended

[mr_hoang]

Hi there! Using this service too and see today - my balance is 0.00. Blockchain shown real amount. What's problem?

[ttg43]

Hi there! Using this service too and see today - my balance is 0.00. Blockchain shown real amount. What's problem?

Hm. Maybe weak conection? Try to use your private keys in other wallet (for example in bither).

[ttg43]

Hey, OP. Any option to make similar wallet for dash? There no any web wallet for dash at all - big opportunity, I think)

[Financisto]

This fork from coinb.in is on its way to add Dash: https://github.com/ttutdxh-nubits/cointoolkit/pulls 

[ttg43]

This fork from coinb.in is on its way to add Dash: https://github.com/ttutdxh-nubits/cointoolkit/pulls 

To be honest I don't trust this project because it has no reputation for now(

[Financisto]

It's also open source so you can review the code yourself, download from GitHub and use it offline even if you don't trust it.

Talking about Dash, there's also BIP39 Tool which I just added to my list here: https://bitcointalk.org/index.php?topic=1164163.0

That one also generates an Hierachical Deterministic Wallet from BIP39 mnemonic for several coins (Dash included).

[100bitcoin]

The website https://coinb.in seems to be down right now. I had a downloaded copy. So, I tried to use it offline. But, that is now working either while I am trying to create a new Tx. The system is unable to download the UTXO set. There are only 2 available options for mainnet - coinb.in (Bitcoin mainnet) & Blockr.io (Bitcoin mainnet). The first one is not working as expected, but the second one is not working either. It is throwing the error - Unexpected error, unable to retrieve unspent outputs!.

[bitspill]

The website https://coinb.in seems to be down right now. I had a downloaded copy. So, I tried to use it offline. But, that is now working either while I am trying to create a new Tx. The system is unable to download the UTXO set. There are only 2 available options for mainnet - coinb.in (Bitcoin mainnet) & Blockr.io (Bitcoin mainnet). The first one is not working as expected, but the second one is not working either. It is throwing the error - Unexpected error, unable to retrieve unspent outputs!.

Here's a modified coinb.in with added support for Multi Sig transactions as used by Rein

http://reinproject.org/coinbin/


Edit: It's for Bitcoin Mainnet

[HostFat]

@bitspill
Is there a github repo with your modifications?

[weex]

@bitspill
Is there a github repo with your modifications?

https://github.com/ReinProject/coinbin/ is what's hosted on https://reinproject.org

Edit: now https