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Date: Wed, 24 May 2023 10:53:50 +0300 (TRT)
From: Burak Keceli <burak@buraks.blog>
To: ZmnSCPxj <ZmnSCPxj@protonmail.com>,
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X-Mailman-Approved-At: Wed, 24 May 2023 09:36:57 +0000
Subject: Re: [bitcoin-dev] Ark: An Alternative Privacy-preserving Second
Layer Solution
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> 0-conf transactions are unsafe since it is possible to double-spend the inputs they consume, invalidating the 0-conf transaction.
A future extension of Ark can potentially utilize a hypothetical data manipulation opcode (OP_XOR or OP_CAT) to constrain the ASP's nonce in their signatures to disincentivize double-spending. If a double-spend occurs in a pool transaction, users can forge ASP's signature to claim their previously redeemed vTXOs. This is effectively an inbound liquidity-like tradeoff without compromising on the protocol design.
For the time being, you have to wait for on-chain confirmations to consider a payment 'final'. However, this doesn't prevent you from paying lightning invoices with your zero-conf coins. Ark has immediate availability with delayed finality.
Best,
Burak
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