9 votes

How is a slot leader actually selected to make a block?

1.) epoch nonce 2.) pool's vrf key 3.) pool's percentage of overall staked ada 4.) active slots coefficient All four of these determine if a pool is allowed to mint a block in a given slot (happens ...
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7 votes
Accepted

How does Cardano execute real time transactions if block time is 20 seconds?

Block time is 20 seconds in average. Sometimes we have blocks at shorter intervals, sometimes much longer. I saw sometimes sequences of 4 or 5 blocks at one second interval from each other. And ...
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7 votes

Could the d-factor still be changed, to revert to more centralized block production by IOG?

Cardano has three different pillars of decentralization: The first pillar: block production. Once d hit 0, this pillar was fully decentralized. The second pillar: networking. It means how nodes find ...
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  • 1,072
5 votes

What decisions are left to the slot leader?

The Haskell reference implementation of the Cardano node, leaves no such decisions to the slot leader, and most (if not all) are using that node implementation. As far as the Cardano protocol is ...
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4 votes
Accepted

Stake pool - Failed to start all required subscriptions

"Failed to start all required subscriptions" As recommended by @KC Gibson, reduce the valency for the IOHK node to two, and restart the node. The remote host is closing your connections, ...
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  • 691
4 votes

Selfish mining / denial of service on Cardano?

Update 12/13/2021: My first question on Cardano Stack Exchange was What is the Penalty for Running 2 Block Producer Nodes? Which I was told, "Network can penalize." But I never received an ...
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3 votes
Accepted

Airgapping Concerns for Block Producer Secrets

The pool keys control the pool and can never be changed. If your pool keys are exposed, then you have lost control of your pool (this doesn't necessarily mean your pledge, but control of the fees, ...
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2 votes

What is block density?

Just building on top of answer from Erik, a simple way to look at it would be : (number of blocks minted so far in current epoch) / (number of slots so far in current epoch) In ideal scenario, the ...
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  • 1,097
2 votes

What is block density?

Each epoch is supposed to have about 21600 blocks per epoch, where an epoch is 5 days long. If every epoch had 21600 blocks, the density would be 100%. However blocks occasionally get skipped so the ...
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1 vote
Accepted

Block diffusion pipelining and spam attacks

From a member of the IOG networking team. Q1/ Have I understood the above accurately? Generally, yes. Except wording suggests that you don't realize diffusion is already split into headers and block:...
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1 vote

Why does the full transaction have to be included inside the block?

there is indeed a Cardano-improvement-proposal addressing such reference scripts https://cips.cardano.org/cips/cip33/ also here on github https://github.com/cardano-foundation/CIPs/tree/master/CIP-...
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1 vote

Is there a penalty for having two block-producing (BP) nodes in a pool that try to mint a block in the same slot?

There is no such penalty at the protocol level. However, you will probably get called out on Twitter :)
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1 vote

Could the d-factor still be changed, to revert to more centralized block production by IOG?

As long as the facility is available in the code, it is technically possible for the process to be reversed.
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  • 1,937

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