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From: Alex Mizrahi <alex.mizrahi@gmail.com>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] Trustless Segwit activation bounty protocol (aka. bribing the miners)
Date: Thu, 27 Apr 2017 21:41:17 +0300	[thread overview]
Message-ID: <CAE28kUTQtU17W4xbSgOKvpBWCppoZS1B+iBs_JUAd6nYe=hcgw@mail.gmail.com> (raw)
In-Reply-To: <CACV3+OU3wT6ZZ+ffUOEXpnmu9p0kf42fEBv3fPxnGPJ88BVwAg@mail.gmail.com>

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>
> 2B. If Segwit has not activated at height H, Input 1 of the Bounty Payout
> is not valid since it spends a P2WPKH output, preventing the miner from
> including the Bounty Payout transaction in the block. (However, the output
> of the Segwit Assertion tx can be claimed since it is treated as
> anyone-can-spend, although this is not an issue since it is a very small
> amount).
>

It's a small amount by itself, but miners who are aware of Bounty Payout
Transaction will try to include both these transactions (and both are valid
both on SW and non-SW chains by definition of SW being a soft fork).

If you set timelock of BPT to (H+1) then you sort of discourage this
behavior because a miner of block H might be not the same as miner of block
(H+1), thus he cannot grab this bounty for sure.

Still, there is a chance that same miner will mine both blocks, so
game-theoretically it makes sense to insert SAT into your block since your
expected payoff is positive.

So I'm afraid miners will just grab these bounties regardless of segwit
activation.

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  parent reply	other threads:[~2017-04-27 18:41 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-27 17:48 [bitcoin-dev] Trustless Segwit activation bounty protocol (aka. bribing the miners) Matt Bell
2017-04-27 18:25 ` Alex Mizrahi
2017-04-27 18:41 ` Alex Mizrahi [this message]
2017-04-27 19:45 ` Antoine Le Calvez
2017-04-27 20:10 ` Johnson Lau
2017-04-27 21:05   ` ZmnSCPxj

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