Analysis of Ethereum GHOST Agreement

GHOST is called Greedy Heaviest-Observed Sub-Tree, the most observable subtree protocol for greed. Unlike the longest chain principle in Bitcoin, Ethereum uses the GHOST protocol to determine the main chain by judging the heaviest subtree.

Algorithm Description

Algorithm for selecting a block as the main chain

Input: Block tree T 1. set B ← Genesis Block 2. if ChildrenT (B) = ∅ then return(B) and exit 3. else update B ← argmax |subtreeT (C)| C∈ChildrenT (B) 4. goto line 2 

ChildrenT (B) returns the set of sub-blocks of B; subtreeT(C) returns the weight of the root tree with C

Beginning with the Genesis block, initialize B to the genesis block;

Determine whether the subtree of B is an empty set, and if it is empty, indicating that no subblock is currently the main chain, return B block and exit;

Otherwise update B is the sub-block with the heaviest subtree;

Go to step 2 and continue to find the next block of the main chain;

Ethereum and Bitcoin's main chain selection

The block weight is the number of valid blocks in the tree root (difficulty accumulation)

As can be seen from the above figure, using the longest chain principle in Bitcoin, 0<-1B<-2D<-3F<-4C<-5B is the longest main chain; the most heavy subtree principle is used in Ethereum 0<-1B <-2C<-3D<-4B is the heaviest main chain

Uncle block reward

Basic content :

1. The main chain block gets the basic reward (3Eth)

2. One block refers to at most two unblocks

3. Contains a non-block to get 1/32 of the mining reward

Calculation formula :

 ((叔块高度+8-当前块的高度)/8 )*base reward 

The transaction fee is not assigned to the uncle block. The difference between the current block height and the uncle block height is 8 (or more).

GHOST advantages

1. Security is independent of the block speed, which guarantees the expansion of GHOST (no reduction in interval due to reduced time, up to 200tps)

2. Solve the problem of lone block reward and encourage miners to participate in the block

3. Demonstrate that blindly increasing TPS is not feasible by increasing the block rate and block size.

summary

The ghost protocol uses the most heavy chain principle to improve system security;

Increased the reward for the uncle block and encouraged the miners to participate;

However, the current tps is still not high (10-20) and requires the participation of other expansion plans;

Reference link:

Http://www.jouypub.com/2018/9b19cff7135411bd37356e6c4f5f63b7/

Https://github.com/nebulasio/consensus-survey/blob/master/ch/main.pdf

We will continue to update Blocking; if you have any questions or suggestions, please contact us!

Share:

Was this article helpful?

93 out of 132 found this helpful

Discover more

Blockchain

Will FTX liquidating $3.4 billion worth of crypto assets become the main culprit behind the market crash?

For FTX's legal team, this week will be a busy one as they seek regulatory approval to liquidate $3.4 billion worth o...

Opinion

LD Capital How should we dance with the wolves by dissecting the DWF business logic?

DWF has risen to prominence this year with continuous large investments, leading to significant increases in associat...

Blockchain

Coinbase UK's 2018 net profit margin was 4.3%, up 2 points from 2017

Do you think Coinbase makes money? On April 18, according to Cindesk , according to Reuters speculation and calculati...

Blockchain

Research Report | Blockchain Economics Panorama and Future: Exchange Compliance

Author: BlockVC industry research team Source: BlockVC Editor's Note: The original title is "Postal Chain E...

Blockchain

Starting to decentralize the game platform: Is it a good day to break the monopoly?

On May 31 , Xiao Xiao invited the founding partner of Xingyao Capital, Liu Jiang, founder of Xingheng Education, Chen...

Blockchain

The first in the industry! US cryptocurrency exchange INX seeks IPO listing

The cryptocurrency exchange attempted to raise funds through IPOs rather than ICOs, and INX was the first. On August ...