different signatures for different destinations

[justanickname]

Let's say I am sending 1 bitcoin from address "A" to address "B"
Is it possible to do it in such a way that:

1)to transfer bitcoin form address "B" to address "C" it can only be done with private key "c".
2)to transfer bitcoin form address "B" to address "D" it can only be done with private key "d".

and of course "c","d" are different.

[achow101]

I don't think that is possible. It may be possible to do if address B was a p2sh address that used a custom script, but I don't think it will be possible.

[justanickname]

I don't think that is possible. It may be possible to do if address B was a p2sh address that used a custom script, but I don't think it will be possible.

I am confused, with a custom script it is possible?

[achow101]

I don't think that is possible. It may be possible to do if address B was a p2sh address that used a custom script, but I don't think it will be possible.

I am confused, with a custom script it is possible?

Possibly. I don't know as I haven't checked or tried, but it may be possible to create a custom script which requires different private keys. I think the OP codes have enough options for that logic, but as I said earlier, I do not know. You will need to try this yourself.

[justanickname]

I don't think that is possible. It may be possible to do if address B was a p2sh address that used a custom script, but I don't think it will be possible.

I am confused, with a custom script it is possible?

Possibly. I don't know as I haven't checked or tried, but it may be possible to create a custom script which requires different private keys. I think the OP codes have enough options for that logic, but as I said earlier, I do not know. You will need to try this yourself.

Thanks !

[Beraturker]

From what i understood-- if you send the amount to your own different wallet and then to the destination , private key will be changed.. So you do not have to struggle with different things

[fbueller]

I think this was asked only a few weeks ago, and they didn't like my answer I'll explain it once more: I would use this P2SH script:

Code:

IF
   <Q1> CHECKSIG
   DUP HASH160 <hashDestinationOne> EQUALVERIFY CHECKSIG
ELSE
   <Q2> CHECKSIG
   DUP HASH160 <hashDestinationTwo> EQUALVERIFY CHECKSIG
ENDIF

The output script will be plain ol p2sh:

Code:

HASH160 <hashScript> EQUAL

To compare with your situation: Address "B" is the P2SH address for the above script. Address "C" / "D" are destinationOne / destinationTwo, and they have private keys c/d.

Q1 and Q2 can be different individuals, or just the same person with two private keys. HashDestinationOne and HashDestinationTwo would be the pubkey-hashes of the end public keys we want to authorize to redeem the coins.

We don't use addresses natively on the blockchain, we use hash locks and signatures. A destination is a specific requirement allowing a person to redeem the coins. Take the DUP .... CHECKSIG blocks - if that was the only script, it would have a 1something.... address. But in this case, we've stipulated Q1 needs to add their signature for this branch to be possible. Same for branch 2.

So a destination is just a set of conditions that can be met. In this case, OP requested different signatures to allow the funds to be redeemed at different destinations.

Q1 signature doesn't cause funds to move to destinationOne as there are additional requirements to be met, but once that party has the partially signed transaction, he can add his signature and move the coins. The owner of destinationTwo may even see the partially signed transaction for destinationOne, but he can't tamper with it to allow him access: Q2 has to sign.

Q1/Q2 will necessarily know where the party is moving their funds, and will have to sign that transaction. This isn't bad for privacy, because in another scheme, they could still observe spends from where-ever the coins end up. But it does sound like a way to provide federated access to bitcoin: sign by A and the funds belong to the user; sign by B, and we've got them.. *evil laugh*