How does Electrum change addresses are generated?

BkkCoins

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Quote from: Tungsten on April 08, 2013, 09:20:18 PM

Quote from: BkkCoins on April 08, 2013, 09:10:39 PM

Quote from: ThomasV on April 08, 2013, 12:23:40 AM

Quote from: Tungsten on April 06, 2013, 06:15:38 AM

Does change addresses are generated using special index numbers outside of gap limit?

They need to be able to be deterministically restored eventually?

there is another gap limit for change addresses, fixed to 3. it is not modifiable by the user.

It's a different sequence too. I know you know that but I'm just making it clear. They cannot overlap at all. Well, except by a hash collision but that is extremely unlikely.

I was wondering about indexes of these though, just to test the script.
I working on a Wordpress plugin to fully utilize BTC addresses generation from mpk right now...

Addresses are generated from hashing a string based on the MPK. The normal and change addresses use a different string base. Specifically,

Public key = Master_public_key + Hash( "index:chg:mpk" ) * gen point

where chg is either 1 for change or 0 for normal.

Tungsten

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Activity: 73

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Quote from: BkkCoins on April 08, 2013, 09:10:39 PM

Quote from: ThomasV on April 08, 2013, 12:23:40 AM

Quote from: Tungsten on April 06, 2013, 06:15:38 AM

Does change addresses are generated using special index numbers outside of gap limit?

They need to be able to be deterministically restored eventually?

there is another gap limit for change addresses, fixed to 3. it is not modifiable by the user.

It's a different sequence too. I know you know that but I'm just making it clear. They cannot overlap at all. Well, except by a hash collision but that is extremely unlikely.

I was wondering about indexes of these though, just to test the script.
I working on a Wordpress plugin to fully utilize BTC addresses generation from mpk right now...

BkkCoins

hero member

Activity: 784

Merit: 1009

firstbits:1MinerQ

Quote from: ThomasV on April 08, 2013, 12:23:40 AM

Quote from: Tungsten on April 06, 2013, 06:15:38 AM

Does change addresses are generated using special index numbers outside of gap limit?

They need to be able to be deterministically restored eventually?

there is another gap limit for change addresses, fixed to 3. it is not modifiable by the user.

It's a different sequence too. I know you know that but I'm just making it clear. They cannot overlap at all. Well, except by a hash collision but that is extremely unlikely.

ThomasV

legendary

Activity: 1896

Merit: 1353

Quote from: Tungsten on April 06, 2013, 06:15:38 AM

Does change addresses are generated using special index numbers outside of gap limit?

They need to be able to be deterministically restored eventually?

there is another gap limit for change addresses, fixed to 3. it is not modifiable by the user.

Tungsten

member

Activity: 73

Merit: 10

Does change addresses are generated using special index numbers outside of gap limit?

They need to be able to be deterministically restored eventually?

Topic: How does Electrum change addresses are generated? (Read 1394 times)