# <center>INTRODUCTION</center>

Am happy that i attended this class, it was very exposing. I learnt many ideas during my research and now am going to write my homework post based on the knowledge i have obtained. Please read and enjoy🤭🤭🤭

<center>![20210726_192538_0000.png](https://cdn.steemitimages.com/DQmXvkrivPnoW85tiukuWuFcxKZxcdizz1gMsG95YbNLgmA/20210726_192538_0000.png)</center>

![20210720_050033_0000.png](https://cdn.steemitimages.com/DQmUEp1qQE8hbQgmBSGrSYD5FQP8LdYFuvUy4Xk2KvUCLpN/20210720_050033_0000.png)


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<center><h3>(2) What is the difference between PoS & DPoS? Advantages & Disadvantages? Name a few Blockchain projects which use the DPoS consensus mechanism and indicate the scaling capacity?</h3></center>
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<center><h3>Proof of stake (PoS)</h3></center>

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PoS (Proof of stake) is a consensus mechanism for blockchains that works by selecting validators by the quantity of token they hold in the concerned cryptocurrency. Unlike other consensus mechanism e.g proof of work ( PoW), The PoS system does not incentivize outrageous amount of energy consumption. According to market cap, the biggest proof of stake(PoS) blockchain is cardano (ada) 
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 <center><h3>Delegated Proof of Stake (DPoS)</h3></center>

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Delegated proof of stake (DPoS) is a consensus mechanism in the block chain system that was developed by Daniel Larimer in 2014.  DPoS is a Democratic system where stakeholders vote for some delegates that will maintain the network on their behalf. As DPoS is like a more advanced form of pos, it vies with other proof of stake and proof of work protocols as a way for transaction verification and blockchain organizations. DPoS is used by the steem blockchain.
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<center>![20210726_192220_0000.png](https://cdn.steemitimages.com/DQmVfCKdTjiw3BfCPG5mKXi3BeJuMWUsB68iQRkuWQ2N1Xm/20210726_192220_0000.png)</center>

<center><h2>Differences between DPoS and PoS</h3></center>

S/N | DPoS | PoS
----|----|---
1. | Stakeholder votes on who is accountable for producing blocks in the DPoS system | stakes is delegated to stake pool in the pos system rather than utilized as a voting mechanism
2. | This system relies on a limited number of delegates to be voted on which means that only this limited number of people is permitted to progress the network | elects stakeholders through a random process to produce a block based on the value of the stake recorded on the ledger
3. | The DPoS verification system is more fast and scalable, also because only some few persons are managing the network | many persons can take part in the verification process, thus making it slow
4. | DPoS possess a highe scaling capacity than PoS | PoS have a lower scaling capacity compared to DPoS

![20210720_050033_0000.png](https://cdn.steemitimages.com/DQmUEp1qQE8hbQgmBSGrSYD5FQP8LdYFuvUy4Xk2KvUCLpN/20210720_050033_0000.png)

<center><h3>Advantages of DPoS consensus mechanism</h3></center>

• The DPoS consensus mechanism validate more transactions in a given time 

• DPos blockchains are more scalable than other networks with PoS since they don’t require high computational power

• each token holder have a voice since delegates are elected through a Democratic voting system 

• the DPoS system is energy efficient and uses less hardware 

• in the DPoS system, the democracy gives more token holders the opportunity to decide the next block production. And the block producer need to be in their best behavior because they can also be voted out. **DEMOCRACY!!**

<center><h3>Disadvantages of DPoS</h3></center>

• decentralization is very hard to maintain i guess, decision are laid in the hands of a limited number of token holder (witness) they can easily form an alliance and make the block chain centralized 

• low participation in voting process leaves the system in the hands of a limited number of person. Therefore the system cannot function as a democratic blochchain anymore

<center><h3>Advantages of (proof-of-stake)PoS</h3></center>

•  in the PoS consensus mechanism, users can participate just by staking coin in their various wallets, there is no competition 

• users earn reward for simply staking and holding a coin, in other words they earn reward by contributing to the network 

• blockchain consensus is digitally reached 


<center><h3> Disadvantages of (proof-of-stake) PoS</h3></center>

• To attack the PoS system, user need to obtain simply 51% of the crypto coin within the system 

• to get more profits, users stake up their coin, which can result to hoarding. A coin will no longer be available for transaction because it been kept somewhere.
• user with lower stake have no voice in the network.

![20210720_050033_0000.png](https://cdn.steemitimages.com/DQmUEp1qQE8hbQgmBSGrSYD5FQP8LdYFuvUy4Xk2KvUCLpN/20210720_050033_0000.png)

##### <center>Name a few Blockchain projects which use the DPoS consensus mechanism and indicate the scaling capacity</center>
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• EOS - 21 Block Producers
• Lisk - 101 Block Producers
• Cardano (ADA) - 20 seconds blocktime and 10minutes  maximum transaction time
• Bitshares (BTS) - 101 Block Producers
• Steemit (STEEM) - 51 Block Producers
•ARK (ARK) - 51 Block Producers
• Oxycoin (OXY) - 51 Block Producers

![20210720_050033_0000.png](https://cdn.steemitimages.com/DQmUEp1qQE8hbQgmBSGrSYD5FQP8LdYFuvUy4Xk2KvUCLpN/20210720_050033_0000.png)

<center><h3> In conclusion,</h3></center>

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 In conclusion, the DPoS system has been able to overwhelm the loop holes of the PoS and PoW system as it currently the most decentralized system. Although shareholder possess the final power, but no one person can control the blockchain. Remember it the elected delegates or witness that do the work. both DPoS and PoS consensus mechanism are special in their own ways, it also depends on the user choices. Even ethereum is switching sides from PoW (proof-of-work) to PoS (proof-of-stake) 
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<h4>Have a nice day</h4>
[Resources](