Spectre is a DAG based (directed acyclic graph) distributed ledger (a structure as an alternative to blockchain based distributed ledger).

Is there any mechanism in Spectre to prevent sending spam transactions?

  • Why is preventing spam transactions a goal? – Pieter Wuille Nov 23 '18 at 17:29
  • According to Bitcoin wiki: "Spam transactions are transactions which create undesirable extra load on the network due to not following Bitcoin best practices ...". – Questioner Nov 23 '18 at 18:18

Sure, there is a desire to avoid unnecessary load. But it is futile apart from cautioning people to avoid hurting the system during its growth phase.

In a system without identities there is no way to apply quota or ratelimiting per participant, and global ratelimiting only results in a denial-of-service attack. In practice the only thing that prevents spam is a free market; if people want to pay more for something than others, it will get in. This is independent of the type of consensus algorithm used to construct the chain.

  • I think the consensus is aimed at achieving a global agreement on a single single state of the network and is related to transaction confirmation not sending transaction. So, consensus cannot prevent sending spam transactions. For an unidentified network, one of the approaches to make it costly is transaction fee as it's done in Bitcoin or Ethereum. But how about Spectre? – Questioner Nov 23 '18 at 19:40
  • Spectre has nothing to do with it. It's a replacement for deciding what the best valid chain is. It's unrelated to the economics of what people may want to put in the chain. – Pieter Wuille Nov 23 '18 at 19:42
  • So, do you mean is not possible to use Spectre as a cryptocurrency? when you say: "It's unrelated to the economics of what people may want to put in the chain" – Questioner Nov 24 '18 at 10:10
  • No, I mean that Spectre doesn't change anything. Start with a cryptocurrency with the most-work rule, replace that rule with Spectre... now everything related to spam transactions still holds. – Pieter Wuille Nov 24 '18 at 12:26

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