On 9/25/2014 7:37 PM, Aaron Voisine wrote:
> Of course you wouldn't want nodes to propagate alerts without
> independently verifying them
How would a node independently verify a double-spend alert, other than
by having access to an actual signed double-spend?
#4570 relays the first double-spend A
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On 9/26/2014 5:16 AM, Matt Whitlock wrote:
> Probably the first double-spend attempt (i.e., the second
> transaction to spend the same output(s) as another tx already in
> the mempool) would still need to be relayed. A simple
> "double-spend alert"
A lot of this discussion has already occured. Some code was even
merged into master, then reverted.
See:
https://github.com/bitcoin/bitcoin/issues/4550
https://github.com/bitcoin/bitcoin/pull/4570
It would probably be a good idea to start from that code, as it
addresses many of the possible pitfa
Of course you wouldn't want nodes to propagate alerts without
independently verifying them, otherwise anyone could just issue alerts
for every new transaction.
Aaron Voisine
breadwallet.com
On Thu, Sep 25, 2014 at 7:16 PM, Matt Whitlock wrote:
> Probably the first double-spend attempt (i.e., th
What's to stop an attacker from broadcasting millions of spends of the same
output(s) and overwhelming nodes with slower connections? Might it be a better
strategy not to relay the actual transactions (after the first) but rather only
propagate (once) some kind of double-spend alert?
On Thursd
Probably the first double-spend attempt (i.e., the second transaction to spend
the same output(s) as another tx already in the mempool) would still need to be
relayed. A simple "double-spend alert" wouldn't work because it could be
forged. But after there have been two attempts to spend the same
Something like that would be a great help for SPV clients that can't
detect double spends on their own. (still limited of course to sybil
attack concerns)
Aaron Voisine
breadwallet.com
On Thu, Sep 25, 2014 at 7:07 PM, Matt Whitlock wrote:
> What's to stop an attacker from broadcasting millions
There was some discussion of having nodes relay double-spends in order
to alert the network about double spend attempts.
A lot more users will be using SPV wallets in the future, and one of
the techniques SPV clients use to judge how likely a transaction is to
be confirmed is if it propagates acro
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