Bitcoin's Difficulty Target and Adjustment: Complete ...

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Are there any BIPS that suggest modifying Bitcoin's difficulty algorithm ? /r/Bitcoin

Are there any BIPS that suggest modifying Bitcoin's difficulty algorithm ? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Are there any BIPS that suggest modifying Bitcoin's difficulty algorithm ?

submitted by 127fascination to Bitcoin [link] [comments]

I prefer jtoomim's aserti3-2d Difficulty Adjustment Algorithm over Bitcoin ABC's Grasberg. That is all.

Oh yeah. Read this.
https://read.cash/@jtoomim/dark-secrets-of-the-grasberg-daa-a9239fb6
submitted by ColinTalksCrypto to btc [link] [comments]

Bye, ABC. [Video Edition] - Bitcoin ABC's DAA (Difficulty Adjustment Algorithm), and forced attempt at an 8% IFP (Infrastructure Funding Plan).

Bye, ABC. [Video Edition] - Bitcoin ABC's DAA (Difficulty Adjustment Algorithm), and forced attempt at an 8% IFP (Infrastructure Funding Plan). submitted by ColinTalksCrypto to btc [link] [comments]

On the choice of a new difficulty algorithm for Bitcoin Cash

On the choice of a new difficulty algorithm for Bitcoin Cash submitted by ojjordan78 to btc [link] [comments]

Jtoomim's aserti3-2d Difficulty Adjustment Algorithm is the way to go, not Bitcoin ABC's Grasberg.

For what it is worth, I am voicing my support for Jtoomim's DAA and recommend against go along with Bitcoin ABC's power grab. Been with this community since the split, and crypto in general pre-Ethereum. We can do better than Bitcoin ABC and the way they have handled this.
submitted by hatter6822 to btc [link] [comments]

Bitcoin Cash Difficulty Adjustment Algorithm Development meeting video is now available

Bitcoin Cash Difficulty Adjustment Algorithm Development meeting video is now available submitted by onchainscaling to btc [link] [comments]

"What the heck is a difficulty adjustment algorithm? And why do we need a new one?" [Bitcoin Out Loud]

submitted by AD1AD to btc [link] [comments]

The Bitcoin Cash Difficulty Adjustment Algorithm is being gamed heavily: Proof, and solution (API)

ASICseer mines BCH exclusively with its development fee. In preparation for the BCH halving, we built out an ability to switch between BCH and BTC mining (ultimately, our company must behave profitably). We wanted to go back to BCH mining, but it seemed that BCH profitability was reduced despite supposedly having equalized between the two chains. I started doing some investigation.
I bought coinwarz API access and started logging BCH difficulty, trying to get some real data in the hopes of building out a switching algorithm for internal use.
I figured that I'd take the median value of the last 24 hours. If difficulty was below that value, we'd mine BCH. If difficulty was above that value, we'd mine BTC. A few things came to light:
This screenshot shows that, anytime the difficulty drops to around 60-70% of the median difficulty value over the past day, pools that have both BTC and BCH endpoints ("the cartel") end up finding a disproportionate amount of blocks (as high as 25 blocks per hour) instead of the expected amount of six blocks per hour. In fact, this cartel waits until the lowest possible BCH difficulty to do that.
So, I began to think: "How can we, as honest miners, prevent this occurrence?" With this question in mind, I built out bchdiff, a JSON API that samples BCH difficulty over the last 24 hours and presents the data in an easily-digestible manner.
The trigger for is_bch_diff_low is set to return yes when current_divided_by_median is < 0.98 (98%). With this API, you can mine BCH whenever the difficulty starts to recede. With enough people and enough hashrate, use of this API would prevent crazy oscillations, and would remove the profit motive for this pool cartel. The difficulty would never drop to 70% of its median value, and the pool cartel would no longer be incentivized to bring exahashes of BTC hashrate onto the BCH chain.
Please note: this is not a profit switching algorithm, it is a difficulty switching algorithm. Use of this API will increase your net amount of mined coins/time and will stabilize the BCH chain as a side effect. Profitability never figures into the equation. Finally, and this must be said: If you feel that you're "abandoning" BCH or something equally frivolous, you should not feel that way. I expect you to buy BCH with the BTC that you mine.
Here is an example (with caching) for instructions on how to use this API. This example showcases the ASICseer Remote Config File system, but you don't need ASICseer to use this API. Basically, you would need to specify your BCH and BTC pool endpoints and switch between them depending on the value of is_bch_diff_low (you can also do your own math if 98% of median is not to your liking). If you are experienced with either solo mining or running a pool, this should be relatively easy to implement.
EDIT
To everyone recommending an algorithm switch, please stop. That is not a solution. In 2018, I penned a response to the malicious progPOW attack against Ethereum, and nothing has changed since then:
https://medium.com/@alex_6580/disclosure-my-name-is-alexander-levin-jr-president-of-gpushack-com-60e5543ef6ef
Anyone recommending an algorithm switch is naive at best, and malicious at worst. The only thing an algorithm switch will do is incentivize a gigantic conflict of interest and ultimately a full capture of the BCH developers by hardware manufacturers (one, or many). Hardware manufacturers, either covertly or overtly, will simply pay developers huge sums of money to implement their algorithm of choice, and potentially even add a backdoor for them.
If anyone thinks that it is impossible for open source software to have backdoors, one was just found for ProgPoW last month (after 2 years of speculating that it might).
submitted by ugtarmas to btc [link] [comments]

I prefer jtoomim's aserti3-2d Difficulty Adjustment Algorithm over Bitcoin ABC's Grasberg. That is all.

Oh yeah. Read this.
https://read.cash/@jtoomim/dark-secrets-of-the-grasberg-daa-a9239fb6
submitted by ColinTalksCrypto to Bitcoincash [link] [comments]

On the choice of a new difficulty algorithm for Bitcoin Cash

On the choice of a new difficulty algorithm for Bitcoin Cash submitted by ftrader to Bitcoincash [link] [comments]

New difficulty algorithm needed for SegWit2x fork? (reformatted text) | Scott Roberts | Oct 09 2017

Scott Roberts on Oct 09 2017:
Sorry, my previous email did not have the plain text I intended.
Background:
The bitcoin difficulty algorithm does not seem to be a good one. If there
is a fork due to miners seeking maximum profit without due regard to
security, users, and nodes, the "better" coin could end up being the
minority chain. If 90% of hashrate is really going to at least initially go
towards using SegWit2x, BTC would face 10x delays in confirmations
until the next difficulty adjustment, negatively affecting its price relative
to BTC1, causing further delays from even more miner abandonment
(until the next adjustment). The 10% miners remaining on BTC do not
inevitably lose by staying to endure 10x delays because they have 10x
less competition, and the same situation applies to BTC1 miners. If the
prices are the same and stable, all seems well for everyone, other things
aside. But if the BTC price does not fall to reflect the decreased hashrate,
he situation seems to be a big problem for both coins: BTC1 miners will
jump back to BTC when the difficulty adjustment occurs, initiating a
potentially never-ending oscillation between the two coins, potentially
worse than what BCH is experiencing. They will not issue coins too fast
like BCH because that is a side effect of the asymmetry in BCH's rise and
fall algorithm.
Solution:
Hard fork to implement a new difficulty algorithm that uses a simple rolling
average with a much smaller window. Many small coins have done this as
a way to stop big miners from coming on and then suddenly leaving, leaving
constant miners stuck with a high difficulty for the rest of a (long) averaging
window. Even better, adjust the reward based on recent solvetimes to
motivate more mining (or less) if the solvetimes are too slow (or too fast).
This will keep keep coin issuance rate perfectly on schedule with real time.
I recommend the following for Bitcoin, as fast, simple, and better than any
other difficulty algorithm I'm aware of. This is the result of a lot of work the
past year.
=== Begin difficulty algorithm ===

Zawy v6 difficulty algorithm (modified for bitcoin)

Unmodified Zawy v6 for alt coins:

http://zawy1.blogspot.com/2017/07/best-difficulty-algorithm-zawy-v1b.html

All my failed attempts at something better:

https://github.com/seredat/karbowanec/commit/231db5270acb2e673a641a1800be910ce345668a

Keep negative solvetimes to correct bad timestamps.

Do not be tempted to use:

next_D = sum(last N Ds) * T / [max(last N TSs) - min(last N TSs];

ST= Solvetime, TS = timestamp

set constants until next hard fork:

T=600; # coin's TargetSolvetime
N=30; # Averaging window. Smoother than N=15, faster response than N=60.
X=5;
limit = X2/N; # limit rise and fall in case of timestamp manipulation
adjust = 1/(1+0.67/N); # keeps avg solvetime on track

begin difficulty algorithm

avg_ST=0; avg_D=0;
for ( i=height; i > height-N; i--) { # go through N most recent blocks
avg_ST += (TS[i] - TS[i-1]) / N;
avg_D += D[i]/N;
}
avg_ST = Tlimit if avg_ST > Tlimit;
avg_ST = T/limit if avg_ST < T/limit;
next_D = avg_D * T / avg_ST * adjust;

Tim Olsen suggested changing reward to protect against hash attacks.

Karbowanek coin suggested something similar.

I could not find anything better than the simplest idea below.

It was a great surprise that coin issuance rate came out perfect.

BaseReward = coins per block

next_reward = BaseReward * avg_ST / T;
======= end algo ====
Due to the limit and keeping negative solvetimes in a true average,
timestamp errors resulting in negative solvetimes are corrected in the next
block. Otherwise, one would need to do like Zcash and cause a 5-block
delay in the response by resorting to the median of past 11 blocks (MPT)
as the most recent timestamp, offsetting the timestamps from their
corresponding difficulties by 5 blocks. (it does not cause an averaging
problem, but it does cause a 5-block delay in the response.)
original: https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-Octobe015167.html
submitted by dev_list_bot to bitcoin_devlist [link] [comments]

"What the heck is a difficulty adjustment algorithm? And why do we need a new one?" [Bitcoin Out Loud]

submitted by AD1AD to Bitcoincash [link] [comments]

Bitcoin Cash Difficulty Adjustment Algorithm Development meeting video is now available

Bitcoin Cash Difficulty Adjustment Algorithm Development meeting video is now available submitted by onchainscaling to Bitcoincash [link] [comments]

Bitcoin Cash Difficulty Algorithm Debate Heats Up With Fears of Another Chain Split

Bitcoin Cash Difficulty Algorithm Debate Heats Up With Fears of Another Chain Split submitted by Bitcoinmathers to btc [link] [comments]

"What the heck is a difficulty adjustment algorithm?" covering the BCH DAA [Bitcoin Out Loud]

submitted by AD1AD to lbrylnks [link] [comments]

On the choice of a new difficulty algorithm for Bitcoin Cash

On the choice of a new difficulty algorithm for Bitcoin Cash submitted by SamHamou to Bitcoincash [link] [comments]

Bye, ABC. [Video Edition] - Bitcoin ABC's DAA (Difficulty Adjustment Algorithm), and forced attempt at an 8% IFP (Infrastructure Funding Plan).

Bye, ABC. [Video Edition] - Bitcoin ABC's DAA (Difficulty Adjustment Algorithm), and forced attempt at an 8% IFP (Infrastructure Funding Plan). submitted by ColinTalksCrypto to Bitcoincash [link] [comments]

Bitcoin Cash Difficulty Algorithm Debate Heats Up With Fears of Another Chain Split

submitted by raaner12 to Altcoinss [link] [comments]

Bitcoin Cash Difficulty Algorithm Debate Heats Up With Fears of Another Chain Split

Bitcoin Cash Difficulty Algorithm Debate Heats Up With Fears of Another Chain Split submitted by cryptolobe to cryptolobe [link] [comments]

What the heck is a difficulty adjustment algorithm? (And why do we need a new one?) [Bitcoin Out Loud]

What the heck is a difficulty adjustment algorithm? (And why do we need a new one?) [Bitcoin Out Loud] submitted by AD1AD to CryptoCurrency [link] [comments]

"What the heck is a difficulty adjustment algorithm? And why do we need a new one?" [Bitcoin Out Loud]

submitted by AD1AD to crypt0snews [link] [comments]

Bitcoin Mining Difficulty is a Myth!!! Bitcoin Cash DAA Development meeting #3 What is Crypto Mining Difficulty and How it Impacts YOUR Profits - Explained W/ BTC ZenCash ZEC Bitcoin basics: What is the difficulty target and how does it adjust itself? Mining Difficulty - Simply Explained - YouTube

In bitcoin the service string is encoded in the block header data structure, and includes a version field, the hash of the previous block, the root hash of the merkle tree of all transactions in the block, the current time, and the difficulty. Bitcoin stores the nonce in the extraNonce field which is part of the coinbase transaction, which is stored as the left most leaf node in the merkle ... Bitcoin adjusts the mining difficulty parameter every 2016 blocks, but on August 1, 2017, Bitcoin Cash added an Emergency Difficulty Adjustment (EDA) algorithm that ran alongside the DAA. The November 2017 Bitcoin Cash upgrade introduced a simple moving average as difficulty adjustment algorithm. This change unfortunately introduced daily periodic difficulty oscillations, which resulted in long confirmation times followed by a burst of rapid blocks. This harms the user experience of Bitcoin Cash, and punishes steady hashrate miners. Bitcoin difficulty is a value used to show how hard is it to find a hash that will be lower than target defined by system. Bitcoin mining difficulty is changed every 2016 blocks. The difficulty charts show that it has increased significantly. Bitcoin’s difficulty target is a 256-bit number that is adjusted every 2016 blocks (~2 weeks) based on the time it took to mine the previous 2016 blocks. The difficulty algorithm attempts to produce a block roughly every ten minutes and is proportionately modified by Bitcoin clients every two weeks to the amount of time higher or lower than it took to mine the previous 2016 blocks. The ...

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Bitcoin Mining Difficulty is a Myth!!!

Bitcoin Mining Difficulty: An Overview - Duration: 4:37. AMBCrypto Recommended for you. 4:37. Why there will never be more than 21 million bitcoin. - Duration: 8:18. Keifer Kif 751 views. 8:18 ... Bitcoin Cash Difficulty Adjustment Algorithm Development meeting #3: Follow up of DAA meeting number 2: Discuss progress on development, implementation and specification. August 3rd, 2020, 19:00 ... This video is unavailable. Watch Queue Queue. Watch Queue Queue Mining Bitcoin or Ethereum is a hard task for your computer. But why? And what does the difficulty have to do with the security of blockchains? Learn all abo... Consensus Algorithms, Blockchain Technology and Bitcoin UCL - by Andreas M. Antonopoulos - Duration: 1:24:22. aantonop 138,534 views. 1:24:22 . Will the Bitcoin Halving Kill off the Miners ...

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