Public key form private key

[Marian]

Hello

How can I get a public key from a private one? I need to do it in Java, but rpc procedure is ok as well.

 

[flare]

Hello

How can I get a public key from a private one? I need to do it in Java, but rpc procedure is ok as well.

You can use https://paper.dash.org - Wallet Details.

If you want to get hold of the source --> https://github.com/dashpay/paper.dash.org

 

[Bertrand256]

Hello
How can I get a public key from a private one? I need to do it in Java, but rpc procedure is ok as well.

Hi, As far as I know, algorithm to convert priv to pub in Dash is exactly the same as for Bitcoin and is based on Elliptic Curve multiplication. It is well described in Andreas Antonopolous book: https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch04.asciidoc#public-keys

In turn, the conversion public key to it's Dash address is a bit different, but only in that, that it uses a different version prefix (76 instead of 00).

I think, that for priv->pub conversion you can simply use some existing Java bitcoin library .

 

[Marian]

Hi, As far as I know, algorithm to convert priv to pub in Dash is exactly the same as for Bitcoin and is based on Elliptic Curve multiplication. It is well described in Andreas Antonopolous book: <LINK>

In turn, the conversion public key to it's Dash address is a bit different, but only in that, that it uses a different version prefix (76 instead of 00).

I think, that for priv->pub conversion you can simply use some existing Java bitcoin library .

Thank you, conversion from public key to Dash address was easy to made by changing bitcoinJ library.

I still have a small problem with checking if private key if from Dash world. There is a parameter called "dumpedPrivateKeyHeader" in Bitcoin witch needs to be set to 128 in order to confirm that it is private bitcoin key. When I try to guess that parameter for Dash, number 204 seems to work, can someone confirm that?

 

[UdjinM6]

Thank you, conversion from public key to Dash address was easy to made by changing bitcoinJ library.

I still have a small problem with checking if private key if from Dash world. There is a parameter called "dumpedPrivateKeyHeader" in Bitcoin witch needs to be set to 128 in order to confirm that it is private bitcoin key. When I try to guess that parameter for Dash, number 204 seems to work, can someone confirm that?

Yes, https://github.com/dashpay/dash/blob/master/src/chainparams.cpp#L140