So you decided not to since zefir doesn't support transfers? I'm interested in this.
I think it could work if you register on zefir's site, have the funds escrowed to a trusted third party, lock the shipping address to the buyer's, post a signed receipt of that from the site, then the escrow releases the funds. A little scary, but should work.
Topic: [WTS] 20 Avalon chips from zefir's ordering (batch 6) (Read 1069 times)
can be closed...
For future reference:
Have a look at what zefir writes about "after sales trades" here: https://bitcointalksearch.org/topic/m.2017945
For future reference:
Have a look at what zefir writes about "after sales trades" here: https://bitcointalksearch.org/topic/m.2017945
Interested if your offer doesn't pan out. PM.
I have an offer so please hold your PMs (unless you have a reaallly good offer 
)
)
This is the approach I propose to make this deal happen:
Feedback on how I could improve this is welcome!
Quote
Background on the chip ordering process:
The person who can prove that he/she owns the sending BTC address has the right to tell zefir (=the guy who I ordered the 20 chips from) where he should send the chips.
Also, if you want to have your chips assembled (e.g. burnin's thread: https://bitcointalksearch.org/topic/work-in-progess-burnins-avalon-chip-to-mining-board-service-179769) you need to prove that you own the BTC address;
How to prove that you own an address:
To prove that one owns a BTC address one can sign a message using the private key for this address (works in the official BTC client). Other people can verify the resulting message signature and this would prove that you own the private key to this address.
I did this for example in my forum post.
Now, to come to the point:
If I give you the private key to the Bitcoin address, both of us could sign a message to prove that we are the rightful owner of the address. Of course you could trust me that I wouldn't do such a thing.
To overcome this problem I suggest the following approach:
1. You send the 1.72 BTC from an address that you control (=can sign a message with) to the ordering address (1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD)
2. I then send the 1.72 BTC to an address controlled by myself and embed a message into the blockchain stating that is the new owner of 1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD.
That way, since I don't own your sending address, I can't prove anymore that I am the rightful owner of 1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD
3. I will then send you the private/public keys to 1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD and archive my own copies.
4. We make this transfer public in the bitcointalk.org forum, you should cite my posts so that even if I should delete my account or all my posts the public still has a record of it.
The person who can prove that he/she owns the sending BTC address has the right to tell zefir (=the guy who I ordered the 20 chips from) where he should send the chips.
Also, if you want to have your chips assembled (e.g. burnin's thread: https://bitcointalksearch.org/topic/work-in-progess-burnins-avalon-chip-to-mining-board-service-179769) you need to prove that you own the BTC address;
How to prove that you own an address:
To prove that one owns a BTC address one can sign a message using the private key for this address (works in the official BTC client). Other people can verify the resulting message signature and this would prove that you own the private key to this address.
I did this for example in my forum post.
Now, to come to the point:
If I give you the private key to the Bitcoin address, both of us could sign a message to prove that we are the rightful owner of the address. Of course you could trust me that I wouldn't do such a thing.
To overcome this problem I suggest the following approach:
1. You send the 1.72 BTC from an address that you control (=can sign a message with) to the ordering address (1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD)
2. I then send the 1.72 BTC to an address controlled by myself and embed a message into the blockchain stating that
That way, since I don't own your sending address, I can't prove anymore that I am the rightful owner of 1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD
3. I will then send you the private/public keys to 1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD and archive my own copies.
4. We make this transfer public in the bitcointalk.org forum, you should cite my posts so that even if I should delete my account or all my posts the public still has a record of it.
Feedback on how I could improve this is welcome!
Hi, I
For personal reasons I would like to give away my order for 20 Avalon chips (~280 MHash/chip; zefir's thread: https://bitcointalksearch.org/topic/closed-avalon-asic-chip-distribution-177827).
I believe the order is part of batch 6.
No price markup, so it would be 1.72 BTC (20 * 0.086)
m_yaw; 20; 1.72; 1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD
Contact me via PM!
PS: If you have a good idea how to handle this, let me know...
Proof of address ownership:
For personal reasons I would like to give away my order for 20 Avalon chips (~280 MHash/chip; zefir's thread: https://bitcointalksearch.org/topic/closed-avalon-asic-chip-distribution-177827).
I believe the order is part of batch 6.
No price markup, so it would be 1.72 BTC (20 * 0.086)
m_yaw; 20; 1.72; 1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD
Contact me via PM!
PS: If you have a good idea how to handle this, let me know...
Proof of address ownership:
Code:
Address:
1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD
Message:
I, m_yaw, own this address: 1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD.
I would like to sell it to someone
Signature:
HA/mOSprZueE6tUcu3uSHUgSFCGcni5MII4/sb5RHfCkQKRPoxcJTA5AFLkoNggUjkZcZot2OZA2n9VGi3WoRfw=
1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD
Message:
I, m_yaw, own this address: 1wZKwZ7kEqdsZyDjYuFR7okZYiKV4KhcD.
I would like to sell it to someone
Signature:
HA/mOSprZueE6tUcu3uSHUgSFCGcni5MII4/sb5RHfCkQKRPoxcJTA5AFLkoNggUjkZcZot2OZA2n9VGi3WoRfw=
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