Capability?  Agreements between two people are between two people, they can do whatever they like.  Perhaps you intended to ask a question that was directed to actual technology? If so— I can't extract it from your message.

You just re-invented options.

You gotta have a reference to it, if there is no exchange, who knows a bitcoin can be worth $ 600

I have did same kind of deals in the past while I did some exchange between bitcoin to other currency and not to follow the fluctuation but the rate agreed

Both parties would have to put something of value into escrow.  If the buyer of the bitcoins already has some bitcoins of their own, they could place enough bitcoins into escrow to make it more costly to refuse the transaction than to honor it.


While they seller wouldn't necessarily have to place bitcoins in escrow, they would have to place something of value into escrow.  It would need to be something valuable enough that it would be more costly to refuse the transaction than to honor it.


There may be several reasons that someone wants to lock in an exchange price at a given time, but is willing to wait to complete the transaction.

As just one example:

Alan wants to sell 100 bitcoins today for $51,000 cash.
Bob is willing to pay $51,000 for the bitcoins.
Unfortunately, Alan and Bob are unable to meet to complete the exchange of $51,000 until Saturday.
Alan is concerned that if the exchange rate drops below $500/BTC, then Bob might not show up.
Bob is concerned that if the exchange rate grows above $520/BTC, then Alan might not show up.

Both Alan and Bob send 100 BTC to a 2 of 2 multisig address.
Now they both have to show up, or else they both lose 100 BTC.

When Bob show up he brings $51,000 and a signed transaction that sends the 200 BTC to his address.
When Alan receives the $51,000 he signs the transaction and Bob broadcasts it.

Problem solved.

A hero member of community with a heroic solutions,sometimes these kind of problem arises and this is the exact solution

Sounds like a good reason to use a 2 of 3 transaction and an escrow agent that can force the release of the transaction in a case where one party is attempting to extort the other.

Well, yes.  That is the purpose of an escrow provider after all.

However, any escrow agent worth using should be willing to provide contact information:

Name, address, phone number, email address, etc.  With a well written escrow agreement they should be liable for loss or theft of the bitcoins.



Yes.  If you are going to use an escrow provider, you should definitely choose one that you feel is trustworthy.


This says a lot about your moral character. Personally my honor is worth much more to me than 100 BTC. There are other escrow providers here on this forum that have also been reliably trusted with more than 100 BTC.


This is not true.

When a 2 of 3 multi-sig transaction is signed, it is very clear exactly which addresses were used to sign the transaction.


It doesn't matter who the BTC was sent to.  The escrow provider should only release escrow to an address provided by the intended recipient. With a transaction that large, it would be best for the escrow provider to require a signed message from the recipient that includes the address, so that they can prove that the escrow was indeed released to the appropriate address.


Of course you could.  The escrow provider can't betray someone without getting a valid signature from the other party.  The second signature would indicate who the thief is and who was betrayed.