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Questions tagged [proof-of-stake]

proof-of-stake is a method by which a blockchain network aims to achieve distributed consensus by asking users to prove ownership of a certain amount of an asset.

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how to setup hybrid PoW+PoS or PoA private network (geth)

I am aware about PoW and PoA setups of ethereum private networks but would like to know if anyone could help or point me the direction how to setup a hybrid PoW + PoS or PoA ethereum based blockchain. ...
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Is there a temporal reward in Casper, that the earlier you place bets, the more you are rewarded?

In Casper, the consensus-by-bet proof-of-stake system, is there a temporal reward, that the earlier you place bets, the more you are rewarded?
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As of 2018 Sept 21st. When is the scheduled Casper Proof of Stake expected to arrive?

Where can one find updates on Casper POS? I hear its been constantly delayed. When is it expected to arrive? And is there an alpha/beta state where one can test it out now?
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Where do coins in proof-of-stake go when there is a malicious validator?

So know that in Casper, if a validator act in some malicious manner thier stake will be taken away? Do they go in, like, some common pool where other validators receive them or they are just burned ...
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How does Casper record votes efficiently?

I keep reading about Casper doling out rewards and punishments for voters based on how they're voting. If I am understanding this correctly, it seems that Casper punishes nodes that submit votes to ...
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1answer
60 views

Nothing at Stake problem - eth wiki

I am trying to understand proof of stake consensus. I found some explanation about the "nothing at stake problem at the Ethereum wiki. Here is the part about the "Slasher"-solution i don't understand:...
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1answer
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During the POW/POS transition, why would a POW miner choose to mine on the chain with the POS consensus algorithm?

As the title says, what incentive does a POW miner have to mine on the hybrid POS chain? They would, effectively, be removing their own economic incentive from the consensus mechanism. I understand ...
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“consensus over state” vs. “consensus over events”?

Does someone know what is difference between "consensus over state" and "consensus over events" ? I found just title of a reference i.e. "Ian Grigg, blog post “The Message is the Medium,” 2017." ...
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49 views

Delegated Proof of Stake (DPOS) vs. Proo of Stake? [closed]

What is the main difference between Delegated Proof of Stake (DPOS) vs. Proof of Stake? Is there any significant advantage for security? (since PoS in general suffers security problems.) And which ...
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1answer
54 views

Is the mauve paper still actual?

I would like to know if the mauve paper is still actual or it is better to rely on the sharding FAQ and Proof of stake FAQ or on other sources?
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1answer
86 views

What is the “main” difference between consensus mechanism of Bitcoin and Ethereum?

Bitcoin and Ethereum both use proof-of-work (PoW) consensus mechanism. One of differences between Bitcoin Pow and Ethereum PoW is difficulty level, meaning that while in bitcoin block generation rate ...
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1answer
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Proof of Stake Makes the Rich Richer [closed]

Since Proof of Stake Makes the Rich Richer, somewhat similar to Proof of Work mining pools/cartels, why do we still want to move towards Proof of Stake, assuming environmental concerns are not a ...
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Delegated POS (DPOS) vs Proof of Stake (POS): Specified Differences

Delegated POS (DPOS) vs Proof of Stake (POS) -- May I know what are the specified Differences?
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1answer
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What happens to miners when proof of stake is rolled out fully phasing proof of work out completely? [duplicate]

What happens to miners when proof of stake is rolled out phasing proof of work out completely?
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how can validators validate blocks?

I have a question about how POS (ethereum casper) works. I am a little bit confused. So let's say User A decides to be a validator. So he has to have at least 1000Ether in his account to become a ...
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2answers
54 views

Casper Friendly Finality Gadget - Greater degrees of transaction/settlement finality over existing PoW?

With Casper Friendly Finality Gadget, can one expect greater degrees of transaction/settlement finality over existing PoW?
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Is the cost of attacking POS (e.g. Casper) higher as compared to attacking POW?

I've recently read about Vitalik's (and others) arguments on the cost of attack and cost of defense in POS vs POW. Is it really true that attacking POS costs more than POW? This sounds counter-...
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Casper FFG in relation to Proof of Stake

What is the specified relationship between Casper FFG and Proof of Stake?
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1answer
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Ethereum proof of stake - Is transaction finality/settlement finality finally possible / within reach?

With Ethereum proof of stake, is transaction finality/settlement finality finally possible / within reach?
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Proof of work vs Proof of Stake [duplicate]

I'm newbie to Ethereum and trying to make things clear. I've read few articles about PoW(proof of work) vs PoS(proof of stake) and what I understood is, Proof of Work is nothing but the mining, in ...
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1answer
45 views

POS/Sharding - Incentive for submitting proof-of-dishonesty

While reading through the Nothing at Stake section of the Proof of Stake FAQs it is described how dishonest validators will be punished for voting on two chains. This requires a proof of misbehavior ...
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Will staking increase or decrease volatility?

I'm trying to wrap my head around the implications of locking up much of the supply of ether when proof of stake happens. It seems to me that doing so would decrease the circulating supply and ...
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2answers
25 views

Is the requirement for signature of more than 2/3 of validators, weighted by deposit, a solution for the data availability problem?

The data availability problem is known to be one of the main problems in blockchain systems. So in case of a proof of stake scheme which requires a block to collect signatures of at least 2/3 of ...
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1answer
52 views

Will Casper be “backwards compatible” with currently issued tokens such as ERC20 tokens?

With Casper now available for testing, does the protocol work with regular ERC20 tokens? For example if Casper becomes the main protocol for the whole Ethereum network and the old PoW method is gone,...
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1answer
55 views

Reason for World State

All Ethereum blocks contain a stateRoot field - That is, the root hash of the world state trie. I have two questions about that. From what I've understood through all the reading I've done on Casper ...
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1answer
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What are the challenges involved moving Ethereum from POW to POS?

I'm aware of the idea to roll out the POS protocol by using a hybrid model of POS/POW. What are the challenges of such a change? This hybrid model would make mixed adoption(for legacy users and new ...
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2answers
138 views

Is there any anonymity in Proof-of-Authority?

According to the following article, Proof_of_Authority (PoA) is a modified form of Proof_of_stake (PoS) where instead of stake with the monetary value, a validator’s identity performs the role ...
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Casper FFG slashed deposits distribution?

How is the slashed funds distributed upon failing to follow the requirements as a validator?
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Quorum failure - Failed to decode message from payload

We use in our project -JP Morgan Quorum (Ethereum based) bloackchain - with istanbul voting mode. We have 4 nodes (3 of them are validators - hard coded, nonchangable) And from time to time (...
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2answers
137 views

Method for staking coins in Casper FFG

When Ethereum changes to a PoW/PoS hybrid (Casper FFG), how will the staking process work? I heard that there might be smart-contracts and you need to send your coins to the contract to stake the ...
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In Proof of Stake, how can we prevent party owning large portion of stake want to attack?

In Proof of Work, there is this so called 51% attack. But lets say, in Proof of Stake, one day, Google and US government teamed up and owns 75% of the stake. Then they can do whatever they want right?...
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1answer
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Proof of Stake - Timeslots

In PoW several nodes compete to be elected. If n1 does not get elected eventually nX will be elected. So PoW does clearly not need such a concept of timeslots. In PoS lets say a node gets elected via ...
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1answer
148 views

How blocks are calculated in POS

In POS people bet on the blocks to be added to chain and the honest block wins and the people who have voted for honest blocks get a share in the rewards. But one thing i am still confused is, who ...
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Where do the funds go when we loose the stake in PoS (Casper Update)?

In PoS, we know that if the validator try to mess with the blockchain, they loose their funds...where that fund goes ??? tell me please
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Three related hypothetical security flaws in Casper: does the protocol allow them?

Casper attempts to solve the problem of "catestrophic crashes", where validators with more than 1/3rd of the voting weight go offline and thereby stop any more blocks from being validated, by using an ...
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How does Proof of Stake work in Ethereum? [duplicate]

How does a node validate the pending transactions and get the right to create a block? The node with the highest stake? Can a node not participate?
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1answer
542 views

Proof of Stake for ERC-20 Token

I came to learn alot about benefit for proof of stake on Ethereum (staking ether); however, I'm still bit unclear about how that would be applied for ERC-20 Tokens built on top of Ethereum protocol. ...
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In the proof of stake world, does the person holding the most coins have the advantage? [duplicate]

In attempting to understand how proof of stake is different (and potentially better) than proof of work, I'm curious about if one stakeholder holds twice as many coins as another stakeholder, does ...
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1answer
309 views

ETH Staking & Pooling

I have ETH and I am building a portfolio. How will I be able to stake my ETH holdings and make sure these are safe? Can someone please provide some guidance? Thanks
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How will casper maintain time between 2 blocks?

In current proof-of-work, there is an artificial time delay introduced because of difficulty. This allows the network to accept transactions that ultimately form the block. Vlad argues that once ...
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1answer
231 views

Proof of Stake Automatic Timed Release of Token

I'm using https://github.com/PoSToken/PoSToken/blob/master/contracts/PoSToken.sol as my example of Proof of Stake implementation (feel free to point out others that are worth looking at) however, it ...
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1answer
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Why do proof of stake protocols use quorums of 2/3 instead of 51%?

I've noticed many protocols using validators like Casper, Tendermint, EOS require 2/3 of nodes (weighted) as the quorum requirement. What's the reasoning for using this seemingly arbitrary number? ...
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130 views

Is there a tutorial on how to test Ethereum with POS Casper?

I'm looking for an easy step by step tutorial on how to test out how Ethereum POS casper works. Is there a simple tutorial to follow? I'm assuming this is all command line stuff as Casper doesnt have ...
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0answers
106 views

Who proposes blocks in Ethereum Casper the Friendly Ghost

I am trying to understand how CTFG is supposed to work. The available online blogs provide a fairly high-level overview. What I have understood so far is that validators will bet on the blocks as they ...
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1answer
75 views

Can you use Ethereum to build a blockchain with a different proof mechanism? [duplicate]

This may be a silly question but is it possible to build a system that can use both the euthereum proof of work/stake and a custom built proof using the same ethereum nodes?
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1answer
296 views

Understanding Proof of Stake implementation

I am trying to understand Proof of Stake based on this implementation: https://github.com/PoSToken/PoSToken/blob/master/contracts/PoSToken.sol However, I am confused about a few sections and was ...
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2answers
538 views

Staking tokens on Ethereum

I'm new to the blockchain space and I am trying to grasp some fundamentals before delving into programming smart contracts. Please correct me if I am wrong regarding any of the following. This is just ...
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2answers
418 views

Proof of stake. What is liveness?

I'm studying proof of stake. I haven't found a clear definition of what "liveness" is. It is a main thing in PoS content, but I don't think I understand it clearly.
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2answers
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Scaling ethereum [closed]

I have been looking up scaling issues associated with Ethereum. I have not found any resources that give an easy to understand definition of the problem. I am aware that there are efforts like Raiden, ...
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1answer
129 views

Who can participate in Casper?

From what I understand, non-validators will feel benefits from the change to casper. However, is it only validators that can actually participate in Casper? Is it correct that if you have etehreum in ...