Bitcoin Mining Pool

Could someone tell me how to mine testnet coins on guiminer for windows. How to solo mine or pools. /r/Bitcoin

Could someone tell me how to mine testnet coins on guiminer for windows. How to solo mine or pools. /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Upcoming Major Riecoin 0.20 Upgrade

Upcoming Major Riecoin 0.20 Upgrade
A new major Riecoin upgrade is planned, and includes a hard fork. Below is a summary of the changes so far and the hard fork improvements. More details can be found on BitcoinTalk. Feel free to ask Pttn there or on Discord if you have questions regarding the update.
The first step of this upgrade was to update the base code to Bitcoin’s 0.20, which is done. You can find the experimental code at the Github repository. Experimental binaries can also be downloaded here. Despite their prerelease status, they should work fine, though please backup your wallets if you plan to use 0.20, just in case.
Pool operators and other advanced Riecoin users should start looking into the changes and update their software accordingly, as well as closely follow the Riecoin Core development.
Here is a list of notable changes from
The next step will be the hard fork, in order to improve Riecoin in multiple ways. Here is the list of planned changes.
Once the development is advanced enough, a date will be chosen for the hard fork. Testnet will be hardforked first to ensure the well functioning of the implementation. Stay tuned!
submitted by PttnMe to RieCoin [link] [comments]

Vertcoin Mining AMA

What is Vertcoin?

Vertcoin was created in 2014. It is a direct hedge against long term mining consensus centralization on the Bitcoin mining network. Vertcoin achieves its mining consensus solely through Graphics Cards as they are the most abundant / widely available consensus devices that produce a reasonable amount of hashrate. This is done using a mining algorithm that deliberately geared against devices like ASICs, FPGAs and CPUs (due to botnets) making them extremely inefficient. Consensus distribution over time is the most important aspect of a blockchain and should not be taken lightly. It is critical that you understand what blockchain specifications mean/do to fully understand Vertcoin.

Mining Vertcoin

When users of our network send each other Vertcoin, their transactions are secured by a process called mining. Miners will compose a so-called block out of the pending transactions, and need to perform a large number of computations called hashes in order to produce the Proof-of-Work. With this Proof-of-Work, the block is accepted by the network and the transactions in it become confirmed.
Mining is essentially a race. Whoever finds a valid Proof-of-Work and gets the block propagated over more than half of the Vertcoin network first, wins this race and is allowed to reward themselves with the block reward. The block reward is how new Vertcoin come in circulation. This block reward started at 50 VTC when Vertcoin was launched, and halves every four years. The current block reward is 25 VTC.
Vertcoin's One Click Miner:
Learn more about mining here:
Specification List:
· Launch date: Jan 11, 2014
· Proof-Of-Work (Consensus Mechanism)
· Total Supply: 84,000,000 Vertcoin
· Preferred Consensus Device: GPU
· Mining Algorithm: Lyra2REv3 (Made by Vertcoin)
· Blocktime: 2.5 minutes
· SegWit: Activated
· Difficulty Adjustment Algorithm: Kimoto Gravity Well (Every Block)
· Block Halving: 4 year interval
· Initial Block Reward: 50 coins
· Current Block Reward: 25 coin
More spec information can be found here:

Why Does Vertcoin Use GPUs Then?

ASIC’s (Manufactuer Monopoly)
If mining were just a spade sure, use the most powerful equipment which would be an ASIC. The problem is ASICs are not widely available, and just happen to be controlled by a monopoly in China.
So, you want the most widely available tool that produces a fair amount of hashrate, which currently manifests itself as a Graphics Card.
CPUs would be great too but unfortunately there are viruses that take over hundreds of thousands of computers called Botnets (they’re almost as bad as ASICs).

Mining In Pools

Because mining is a race, it’s difficult for an individual miner to acquire enough computational power to win this race solo. Therefore there’s a concept called pool-mining. With pool-mining, miners cooperate in finding the correct Proof-of-Work for the block, and share the block reward based on the work contributed. The amount of work contributed is measured in so-called shares. Finding the Proof-of-Work for a share is much easier than finding it for a block, and when the cooperating miners find the Proof-of-Work for the block, they distribute the reward based on the number of shares each miner found. Vertcoin always recommends using P2Pool to keep mining as decentralized as possible.
How Do I Get Started?
If you want to get started mining, check out the Mine Vertcoin page.

Vertcoin just forked to Lyra2REv3 and we are currently working on Verthash

Verthash is and was under development before we decided to hard fork to Lyra2REv3. While Verthash would’ve resulted in the same effect for ASICs (making them useless for mining Vertcoin), the timeline was incompatible with the desire to get rid of ASICs quickly. Verthash is still under development and tries to address the outsourcability problem.
Verthash is an I/O bound algorithm that uses the blockchain data as input to the hashing algorithm. It therefore requires miners to have all the blockchain data available to them, which is currently about 4 GB of data. By making this mining data mandatory, it will become harder for auto profit switching miners — like the ones that rent out their GPU to Nicehash — because they will need to keep a full node running while mining other algorithms for the moment Verthash becomes more profitable — the data needs to be available immediately since updating it can take a while.
Over the past month, we have successfully developed a first implementation of Verthash in the Vertcoin Core code base. Within the development team we have run a few nodes on Testnet to test the functionality — and everything seems to work properly. The next step is to build out the GPU miners for AMD and Nvidia. This is a NOETA at the moment, since we’re waiting on GPU developers which are in high demand. Once the miners are ready, we’ll be releasing the Vertcoin 0.15 beta that hardforks the testnet together with the miners for the community to have a testrun. Given the structural difference between Lyra2RE and Verthash, we’ll have to run the testnet for a longer period than we did with the Lyra2REv3 hard fork. We’ll have to make sure the system is reliable before hardforking our mainnet. So the timeline will be longer than with the Lyra2REv3 hard fork.
Some people in the community have voiced concerns about the fact that Verthash development is not being done “out in the open”, i.e.: the code commits are not visible on Github. The main two reasons for us to keep our cards to our chest at this stage are: (1) only when the entire system including miners has been coded up can we be sure the system works, we don’t want to release preliminary stuff that doesn’t work or isn’t secure. Also (2) we don’t want to give hardware manufacturers or mining outsourcing platforms a head start on trying to defeat the mechanisms we’ve put in place.

Links and Resources

· Twitter:
· Donations:
· Join our Discord:
· Reddit:
· Official Website:
· Facebook:
· Vertcoin Talk:
· Youtube:
submitted by Canen01 to gpumining [link] [comments]

ProgPoW testnet mining pool not working

I attempted to try out the ProgPoW testnet mining pool (looks like there's only one) today, but I'm getting a connection error:
C:\Bitcoins\progminer-1.1.0-amd-windows-amd64\bin>progminer.exe -G -P stratum://[email protected] progminer 1.1.0-amd Build: windows/release/msvc i 14:20:57 main Configured pool i 14:20:57  Selected pool i 14:20:57  Negotiation of EthereumStratum/2.0.0 failed. Trying another ... i 14:20:58  Negotiation of EthereumStratum/1.0.0 failed. Trying another ... X 14:20:58  Error [ The I/O operation has been aborted because of either a thread exit or an application request ] X 14:20:58  No more IP addresses to try for host: X 14:20:58  No more IP addresses to try for host: i 14:20:58  Disconnected from i 14:20:58  No connection. Suspend mining ... i 14:20:58  No more connections to try. Exiting... i 14:20:58 main Got interrupt ... i 14:20:58 main Terminated! 
I'm using progminer v1.1.0 for AMD cards and Windows 10. My rig GPUs are: RX 580 8GB, RX 580 8GB, RX 470 4GB. I also tried v0.16 for AMD on Linux, but the same problem happens.
Looks like it has nothing to do with the mining and the thread/driver isn't crashing. It appears like the pool is rejecting my connections. My wallet address above is a brand new one created with
Does anybody know if the pool has been closed down or the test was only for 1-2 days? Is the test over? I currently see 4 miners with a total of 29 Mh/s. I can't find any guide or explanation. Is there also a way to solo mine on the Gangnam testnet, if the pool is currently broken?
submitted by Hammereditor to EtherMining [link] [comments]

ANN - RENESIS - LTME (Long Term Mining Evolution)

ANN - RENESIS - LTME (Long Term Mining Evolution)
LTME ( Long Term Mining Evolution) With ASIC Resistance Promise hav0k, The Renesis Core

Renesis Specifications:

Algorithm: Renesis Ticker: RESS Whitepaper v1: Block Time: 2 minutes Block Reward: Variable. Refer to whitepaper for reward structure. Halving: Yes Doubling: Yes Mined Confirmations PoW/PoS : 60 TX Confirmations: 10 Minimum RX confirmations to forward: 1 Total Coin Supply: 350M for Proof of Work PoS Cap: No PoS Stake Reward: 10% per year Pre-mine: Yes ( First 100 Blocks mined on low difficulty with CPUMiner) Bounties Available: Yes - From Premine Rewards Available for Community Developers: Yes, from Premine CPUMiner Available: Yes - Windows binary & source. NVIDIA GPUMiner Available: Yes ( Reward for fair release of GPUMiner is paid! 50,000 RESS ) AMD GPUMiner Available: No ( Reward for fair release of GPUMiner is > 12,000 RESS ) Renesis New Logo Design Competition: Yes ( Reward of 2000 RESS ) Renesis QT Wallet Theming Competition: Yes ( Reward of 5000 RESS ) Renesis V2 Static Website Design Competition: Yes ( Reward of 7000 RESS ) Renesis public Pool addition reward: Yes (10000 RESS) - First 3 Pools. Renesis Node Hosting: Yes ( Reward of 1000 RESS offered for 1 month of hosting ) Translation Bounties: Yes ( Reward of 500 RESS per translation posted ) Social Media Bounties: Yes ( Connect with us on our channels for information ) ICO: No - Bitcoin Talk ANN for everyone to mine starting 101 block Masternodes: Planned MainNet P2P port: 9775 MainNet RPC port: 9774 TestNet P2P port: 19775 TestNet RPC port: 19774
Renesis Development Team : hav0k - 2 developers Group : The Renesis Group ( Visit for profiles ) - 7 members Web Site: Block Explorers: - Reddit: Connections: Discord, Telegram, Slack ( Visit to connect ) Will have web wallet: No - We believe coins should be safe in your wallets not online. Pools: To be announced after announcement. Exchanges: To be announced.

Pools: 10000 RESS Reward TX : 10000 RESS Reward TX: 10000 RESS Reward TX:


addnode addnode addnode addnode addnode ( Node by CryptoHobo. 1K RESS every month . TXID : 1e7a332788bceb23438b783dac172c853804d51443f43a1d68b378447981059f - 22 July 2018 addnode addnode addnode addnode addnode renesisckko455xx.onion add ( Tor Node )
Terms & Conditions for GPUMiner Releases : Developers must release the mining software + source after brief testing to Renesis Group to claim their reward. The group will immediately upload the GPUMiner with sources on github after mining 2 test blocks and will provide proof to community. If GPUMiner software is released directly to the community then it would fair but there will be no reward for software developers.


At the time of announcement, you can mine solo until pools become available. Download the CPUMiner binary or source from github with a wallet Place the renesis.conf in your wallet data directory and (re) start wallet. Run start.bat file inside CPUMiner bin folder to mine Renesis. You can edit the start.bat file to edit the number of threads for mining. If you wish to mine on a pool then use the poolmine.bat file.
Note: Please be advised that the cpuminer.exe can show up as a virus on Windows just like almost all mining software. You can be assured it is not and is labelled as coin miner, CpuMiner (PUA) or malware. Refer to virustotal report here . You can safely verify your Claymore and EWBF CUDA miners at virustotal and they will give similar results. If you feel that it has a virus then please do not mine. Virustotal scan for Windows wallet is : .For questions related to GPUMiner releases, please ask fellow miners or their respective developers when their releases become available for download.
UPDATE: CCMINER Download : Reward of 50000 RESS paid to user A1 on Discord :
Special thanks to mrM4D for his guidelines on CPUMiner build. Cheers to ocminer, mrM4D and Epsylon3 Greets to: SCRIV, RavenCoin for their game changing innovations and ASIC resistance commitments.


Phase 1
Renesis Release Development - done CPUMiner Development - done Generate the premine - done Announcement - Underway Community Developers - 3 required and backed by funding from premine. Update: 1st Dev joined the dev team GPUMiners for AMD - Awaited and backed by rewards for fair release by developers. Masternodes Solution - TBA by developers and community consensus and backed by rewards from premine. ASIC Survey - Planned Rensis Hash Enhancement - Planned. TBA under phase 2 or after ASIC Survey Renesis Holdings Fund - Planned
Phase 2 - Next
Good things coming here =) Real use case 1 - Planned Real use case 2 - Planned To be announced after completion of Phase 1
Phase 3 - Planned
Online Gaming - Planned
Phase 4 - Planned
To be announced after completion of Phase 3
submitted by dev_hav0k to Renesis [link] [comments]

[Index] Scaling Conference Overview: Day 1

Conference Topic \ Speaker \ Time Link
Privacy \ Fungibility
Smart Contracts
Proof of Work
submitted by KarmaNote to Bitcoin [link] [comments]

QuarkChain - Future is here

QuarkChain aims to build a user-friendly, decentralized and reliable blockchain that can ultimately handle millions of transactions per second.
Scalability has been integrated into the design of QuarkChain from the get-go and with this in mind they’ve set out to build a platform capable of supporting industries ranging from FinTech to gaming and social media.
The Problem There’s a saying in life that goes like this…
When you’re young you have time and energy, but no money.
When you’re an adult, you have money and energy, but no time.
When you’re retired, you have time and money, but no energy.
What a dilemma! Or should we say… trilemma?
Hmm, well is it really not possible to achieve all three? Of course it is!
A similar trilemma presents itself in blockchain however there has been no viable solution uncovered to date and this is exactly what QuarkChain along with many others in this space are attempting to solve.
The blockchain trilemma looks like this:
A permissioned (centralized) blockchain can provide scalability and security however loses all trace of decentralization. Permissioned blockchains are similar to centralized systems in the old world such as banks, Visa, as well as PayPal.
Opting for a permissionless (decentralized) blockchain such as Bitcoin or Ethereum provides security and a dispersed network however scalability is sacrificed, this was evident with the CryptoKitties dApp and excessive transaction fees when the demand on the Bitcoin network was high.
The real challenge therefore is figuring out how a blockchain can ACHIEVE ALL THREE:
Decentralization Scalability Security Whomever is able to solve this trilemma will likely score themselves “a one-way ticket to the moon”!
But before we leap towards thinking about getting onto the moon, let’s take a step back and consider exactly why it is that decentralization, security, and scalability are essential components for a blockchain…
The two primary components that ensure the security of a blockchain are:
Making sure only valid transactions are made; and That the network is safe and resistant to malicious attacks and users. Ensuring that only valid transactions are made allows users of cryptocurrency to maintain a strong level of trust and confidence in the value of the crypto.
If a user can easily send tokens they don’t own and make new ones out of thin air, this greatly undermines the value of the cryptocurrency.
This would be similar to printing money out of thin air, which has been a regular practice for many reserve banks around the world for several years. The more money is introduced into any economy this will drive inflation up causing the currency being printed to drop in value..
When this is taken to extremes hyperinflation can occur as was the case in Zimbabwe and this can cause all sorts of mayhem, strife, and havoc.
As the term implies decentralization is the opposite of centralization and in the case of crypto an extreme level of centralization would be having a sole miner for a blockchain.
Anyone transacting on this blockchain would need to have a great deal of faith and trust that this sole miner won’t do anything dodgy as make up fake transactions.
Even if people trusted this miner, the network would still be at great risk as now anyone interested in taking down the blockchain has a single target to attack. They can launch a denial of service attack on the miner taking the whole network down or look to bribe, blackmail, or manipulate the miner into doing their bidding.
As written above, decentralization and security are essential for the ecosystem, they provide a reliable and costly efficient space to continue evolving into future tech. On the other hand, as shown on the next diagram, as security and decentralization grows, an enormous amount of data , requirements for storage and bandwidth needs grow with it, which intrinsically implies a diminution in the system´s scalability.
Solution As illustrated in the diagram below, there are three propositions to solving the problem of scalability:
Multi-blockchains → They may suffer from vulnerability issues, double-spending attacks, reverse transactions or strategic mining attacks. Lightning network→ BTC´s option to this problem seems to be inefficient. User’s transaction targets are random and happen sporadically. Sharding→ Omniledger´s solution to the problem, with the intricate consensus protocol. It may be limited by cross-shards transactions and single shard take overs. But partial solutions do not provide full efficiency especially in a time of exponential evolution. QuarkChain aims to fulfill the ultimate goal of any blockchain: Extending scalability far beyond current tech limits, while maintaining the balance for both security and decentralization.
QuarkChain’s bottom up approach to scalability begins by considering the two primary functions a blockchain serves as a public ledger which is:
Tracking the “state” of a ledger and all of the transactions that are made; and Ensuring only valid transactions are confirmed and recorded onto the ledger. 1. The “State” of a Ledger
If you’re not sure what a ledger is, you can think of it as the thing responsible for keeping track of and recording everything that occurs in your bank account.
Your account has a running list of debits (when money goes out of your account — boo!) and credits (when money goes into your account — woo!) which are recorded whenever money is sent or received into your account.
The “state” of the ledger then is simply a snapshot of what’s in your bank account at any point in time, which is otherwise known as your bank balance! When a friend sends $50 into your account that has $100 in it, the new “state” of your account will then be $150.
An ancient Papyrus ledger
  1. Confirmation of Transactions
If a transaction is made it doesn’t necessarily mean the transaction will go through and this is what confirming a transaction is all about.
Sending $100 to a friend with $50 in your account will see your transaction getting rejected! The transaction won’t be processed and confirmed as it is an invalid transaction due to insufficient funds in your account.
QuarkChain’s 2 Layered Blockchain System QuarkChain separates out these two primary functions with the use of a 2 layered system that allows for greater scalability:
The first layer consists of “elastic sharded” blockchains; and The second layer has a root blockchain.
The first layer with “elastic sharded” blockchains can be broken down as follows:
Elastic: the sharded (minor) blockchains on this layer are elastic because the amount can be increased or decreased as required. Sharded — each sharded minor-blockchain only processes a small subset of all the transactions that occur so they are considered “sharded” as they represent a small fragment of all the transactions occurring throughout the network. (This is what enables QuarkChain’s scalability.) Blockchains — the minor-blockchains keep track of the current state of the ledger by processing and recording relevant data such as user accounts and the transactions made between accounts The Second Layer and the Root Blockchain
The second layer serves the function of confirming the transactions that take place throughout the network. This is done by sending the block headers of the minor blockchains that contain all the transactions to the root blockchain, the root blockchain then confirms these transactions by creating a new block with all of the block headers.
QuarkChain’s 2nd layer system offers a higher amount of transactions per second whilst accounting for bottlenecks that occur from increased throughput such as computing power, data storage, and internet bandwidth.
Structure of QuarkChain’s 2nd Layered Blockchain
Are We Decentralized Yet?
QuarkChain incorporates several features to ensure decentralization of the network:
Collaborative mining driven by game-theoretic incentives to ensure when miners mine for their own selfish benefit that this behavior aligns with what is best for the overall system. Mining difficulty algorithms are designed so that hash power is evenly distributed among sharded minor-blockchains and the root blockchain. Each blockchain offers different rewards and difficulty levels so that weak miners can achieve similar levels of expected returns by mining solo when compared to joining a mining pool. This lessens the need for mining pools and results in less centralization. Main Features — Tech Overview Smart Contracts
QuarkChain supports smart contracts with the use of Ethereum Virtual Machine (EVM), sharded blockchains therefore run their own smart contracts local to their blockchain via EVM.
Sharded blockchains can be thought of as mini-Ethereum’s or clones of Ethereum running simultaneously and parallel to one another with unique individual wallets associated to them.
So for sharded blockchain 1, you will also have wallet 1, and on sharded blockchain 2 there is wallet 2, and so forth… As you can imagine it would be a hassle to keep track of these wallets, especially if there are a hundred or even thousands of these sharded blockchains, which is why QuarkChain offers the following two features:
Simple Account Management Smart Wallet In QuarkChain users are able to use a single “Primary Account” where the majority of the user’s funds will be parked for them to manage all other wallets. When a user wants to send funds to a different sharded blockchain the user simply sends it from their Primary Account.
Primary account sending transactions to wallets located in other sharded blockchains
The Primary Account is combined with a “Smart Wallet” to automatically handle “cross”-shard transactions, these “cross”-shared transactions can be made anytime and are confirmed within minutes.
(A cross-shard transaction is a transaction that is made from one sharded blockchain to another sharded blockchain, e.g. sending funds from Wallet 1 to Wallet 2 would constitute a cross-shard transaction, whereas a transaction made from one wallet to another wallet within the same shard, e.g. Shard 1, is considered an “in-shard” transaction.)
Q1 2018 — White paper and developing verification code 0.1 proof of concept Q2 2018 — Release verification code 0.2 and implement Testnet 0.1 with Wallet 0.1. Testnet 0.1 supports basic transactions including both in-shard and cross-shard transactions Q3 2018 — Release Testnet 0.2 and Wallet 0.2. Testnet 0.2 supports further features such as smart contracts, reshard, etc. Q4 2018 — Release of QuarkChain Core 1.0, Mainnet 1.0, together with Smart Wallet 1.0 Core 1.0 will provide basic functionality and basic optimization (e.g. GPU support) for QuarkChain. Q2 2019 — Release of QuarkChain Core 2.0, Mainnet 2.0, together with Smart Wallet 2.0 Code 2.0 further optimizez Core 1.0 and enables clustering feature for mini-nodes to form a cluster and run as a full node. Token Economics Token Name : QKC Hard Cap : 20 Million USD The QuarkChain token (QKC) will be an ERC-20 token until Mainnet 1.0 launches Q4 2018, the QKC (ERC-20) will then be converted to QuarkChain’s mainnet tokens. Crowdsale intended for end of May or start of June 2 year vesting period for the team with an extended vesting period for QuarkChain’s Foundation QKC will be used to pay for transaction fees and to reward community contributors that help improve QuarkChain’s system A significant amount of QKC will be dedicated to incentivizing developers to build dApps on QuarkChain’s platform
Development Team
Qi Zhou — Founder
Qi Zhou achieved 10M tps as a member of the real time infrastructure team at Facebook Expert in scalability and was a key developer in achieving 10m IOPS with clustering for EMC 5+ years as a software engineer. Short stints with key roles at Facebook (1 year), Dell EMC (2.5 years), Google (9 months) and Ratrix Technologies (10 months). PHD from Georgia institute of Technology
Zhaoguang Wang — Software Engineer
Zhaouang has 6+ years experience as a system backend engineer working on large complex distributed systems Key roles at Facebook (1 year), Instagram (4 months), Google (5 years) PHD and Masters degree in Computer Science and Engineering, University of Michigan
Xiaoli Ma — Research Scientist
Professor at Georgia Institute of Technology (Combined 7 years, 10 months) Previously CTO and Co Founder of Ratrix Technologies (6 years, 5 months)
Yaodong Yang — Research Scientist
Vice Chairman in Education at Xi’an Jiaotong University, Frontier Institute of Science and Technology Co-founder of Demo++ (Tech Incubator) Yaodong has authorized 50+ papers in peer reviewed journals and has over 600 citations in his name.
Wencen Wu — Research Scientist
Wencen has been a Assistant Professor at Rensselaer Polytechnic Institute (4 years and 6 months). Has a MSC and PHD in Electrical and Computer Engineering Operations Team
Anturine Xiang — Marketing and Community
Anturine has 6+ years experience within finance and technology at Wall Street and Silicon Valley Key Roles as Lead Platform Analytics at Wish, Business Development and Marketing at Beepi, Consumer Marketing and Analytics at LinkedIn Partners and Investors
Arun G. Phadke
Arun is a University Distinguished Professor emeritus in the Department of Electrical Engineering at Virginia Tech Fellow of National Academy of Engineering, USA
Bill Moore
Managing Director of Walden International (Global venture capital firm) Previously Chief Engineer Sun Microsystems who co-led the ZFS team, also Former President of DSSD/EMC (Dell)
Mike Miller
Mike is a PhD Physicist with 100+ publications Founder of Cloundant which was acquired by IBM in 2014
Kevin Hsu
Kevin is a serial investor in blockchain companies
Leo Wang
Leo is a recognised cryptocurrency fund manager who invested in blockchain projects. He is an Angel investor in NEO with over 17 years of field experience in mobile internet in China
Zhiyun Qian
Cybersecurity expert who discovered serious vulnerabilities in Linux, Android and TCP/IP Assistant Professor at University of California Riverside
submitted by xnxkillswitch to QuarkChain [link] [comments]

Testnet mining or faucets - are there any left?

I need a number of Testnet coins for development and have run out.

All of the faucets are no longer functional, and it doesn't look like you can mine solo using bitcoin core anymore.
And there don't even appear to be working pools for Testnet anymore either, so I don't think I can point my block erupter cube (asic) at anything.

How is one supposed to get their hands on Testnet coins these days?

submitted by replaysMike to BitcoinMining [link] [comments]

Interesting Questions and Answers from Slack (shortened)

What can be done with Javark in the future? you can outline some short & interesting scenarios for me?
In the future? More like now - you can build app that utilitizes Ark blockchain. How someone uses it is up to them - example : mobile gaming (payment method or using ARK tokens in-game to purchase from game shop), enterprise level stuff, verifications on blockchain, ... basically now its more in developers hands on how they want to implement and use it. fix developed easy to use Java lite client to work with ark blockchain so you just need to incorporate this in the app that you want blockchain used in.
a good example is that tipbot (written in Java) currently has to make an OS call to start up Python, run some Arky scripts, and then capture the output via a status code and returning JSON in order to check a balance, send a transaction, or whatever else it does. (edited) Javark means I can create transactions directly within tipbot within the same process, and no longer have to install Python or Arky on any of its nodes (edited)
so basically not the ark developers create all this new scenarios, but they give the language and power to all who want to embed a cryptocurrency in whatever system they have?
exactly it provides another way of interacting within the Ark network
and there is no other crypto that can do that? by now ark was the first as i read
first DPoS blockchain ethereum or bitcoin also has Java libraries
Python and Java are probably the two most important, most IoT devices run one or the other
the advantage that ark has is speed - who will wait 10 minutes for confirmation of bitcoin to I don't know unlock some file or door?
exactly thats why i bought in xD speed is so important (.)\* Regarding Delegates and the Voting System. What could Delegates do bad or wrong that somebody unvotes them? And what doey need to be good at to get votes? i know its about forging coins, but isnt it just a program running? i dont know much about nodes yet.
Install wrong fork.... Majority of delegates decides on the protocol of the network
so if he does some bad coding/programming which does harm to the network?
Lets say someone codes ark unlimited
Delegate will decide for ark or ark unlimited Majority will win....
so its 51 delegates (like in a congress) who are voted by the ark users and these decide for the paths ark will go through... if its a fork or some new applications being embedded etc?
i get that. but i dont know why i should unvote somebody for example. i dont know any delegate personally
To vote someone else
yeah but why? why should i care? i dont know them
If a decision comes up delegates will take sides
i dont know what they stand for
You will vote for one to represent you Currently not much conflict and politics yet
for example i only know cryptolanka, because i watch his videos, but i dont know any other delegate. so i dont know what they have on their agenda. how can i get information about that? ok i see so later i will know them by twitter, youtube etc and know their opinions
Delegate proposal in the forum
have to check that out
Has current positions. Mostly how to use profit for now
can normal people make suggestions? Scenario: Ark Fee is 0.1 ARK. If Ark is worth 100$ it is 10$ Fee... People think its too much, they create a movement or something to change this.... or are only delegates able to bring in ideas?
one of the features for future is dynamic fee structure so that will be possible :slightly_smiling_face:
yeah lets pretend there would be no dynamic fee structure... just focussing on the aspect of making proposals which direction ark should shift could I make this proposal? or only one of the 51 delegates?
you can make proposals :slightly_smiling_face: - there is a section on github for AIPs GitHub ArkEcosystem/AIPs AIPs - :mortar_board: Ark Improvement Proposals
thanks! :slightly_smiling_face:
but yeah first step would be to reduce fee if dynamic fee structure wouldn't be implemented yet and if ark would be of such value no one would pay 10$ for fees anyway so it would need to be changed much prior to that
In bitcoin, litecoin, etc. the biggest miners are those who decide, right? like mining companies etc
I think dynamic fees should be looked at fairly early on, force it in an update before the delegates really get established
I agree
should be introduced in this year imo
if Ark does take off, delegates will be unlikely to want to update if it means they'll get less fees only way out would be a hard fork, which would be fine long term
you'll update c'mon ?
I dont know much about this political systems, but it feels to me, that there is a natural danger - like with politicians - that some people get too powerful and they campaign for themselves, but they devide totally different. is there a danger like this? or what kind of things prevent this?
like if we have hillary clinton as one of the delegates or whoever xD
you still need majority consensus so 1-2 bad actors won't change much when we talking about 20+ that would be something
problem currently are all the self funded delegates :wink:
why is this a problem?
they don't need votes
because they have the most coins?
they have enough coin to sponsor a seat for themselves economics says they will act in their own intereste
they are heavily staked in the project, so it's likely they'll go way of general concencus. but, we haven't really seen a split in dpos so far to know what would happen
but that might not be in the interest of smaller bag holders
I have
's address we can send someone to update if he won't comply :trollbounce:
hehe :slightly_smiling_face:
like for example the none forging delegates can't be unvoted i know it does not really hurt currently :slightly_smiling_face:
brb, need to start my 4 minute walking commute from work :ermygerd: :trollbounce:
ok i see if there will be a whole new "proof of whatever" system, can people vote to go another route, with a fork or within this current fork? is this even possible? lets say there is "proof of artificial intelligence" XD like changing from a democracy into a technocracy or whatever
if majority would vote for that then ark could switch yes
delegate basically downloads the node code and runs it by doing so he chooses which code to run if majority chooses some code ... this codes rules are valid that's at least how I understood it
if there is a delegate who runs a different code just because he wants to, people just unvote him and so he has no power anymore?
if he runs different code he won't forge if he is active
he can't make blocks valid
he needs consensus enough delegates with same code
it can be seen with pow & bitcoin right now. 30% running unlimited nodes, 30% running segwit. fortunately, they have agreed to play nicely with bitcoin core until a fixed concencus is reached, in which case either version will start pumping out blocks that are invalid with the other version
so one alone does not do any harm If we talk about nodes anyway how do you make sure to not muss forging like some do? do you know when your time for forging is?
run ark node on dependable server
monitoring scripts, auto-failover
coins also helps to better forge
:this: ddos mitigation
those who are no delegates can't stake their coins? as i understood only the delegates stake it?
you "stake" it by voting for profit sharing pool / delegate anyone can "stake"
yes thats what i read, but can I see where I stake how much? how much I earn? for example in the POSW online wallet, you see how much you stake every few minutes/hours its easy to read pivx hasnt that feature, i needed to ask the developers
you "stake" all ark of a wallet with one vote but it is not really "staked"
and how much do i earn? where can i see that?
you earn nothing at all all goes to delegate delegate decides what to do with it the profit sharing once will pay out a part of it !calculate slackbot Custom Response
it is basically mutual agreement between you and the delegate you vote dependable server and failover .... is there a guide how to set it up? I guess I would need 2 VPS and some CRON job or something ... or how do you do it?
so basically i could keep 1 ark in my wallet to vote and the rest on an exchange? i still voted and thats all i can do, right? sorry for these stupid questions, i just want to go through different scenarios
then you only vote with 1 ark
ark has to be in the wallet you vote with you only vote for one delegate with the entire ark of that wallet ark on exchange does not vote (as exchanges do not vote (currently))
ok, so if you have 5000 ark, i have 3000 and
has 10.000 but only 1000 in his wallet and we all vote one person, that means 9000 ark will be staked for this one delegate?
sorry ... dinner ... can help explain more I found out so far later if you want
sure, np
that is correct and biggest share would go to
in this case
you mean his vote weighs more than ours, right?
more ark you have more voting power you have
yes cause he is voting with 5k you with 3k and I with 1k
but he doesnt earn, like people do with pivx or other coins i see
nope delegate pays out according to his proposals and you choose which is best suit for you
someone who wants to be a delegate needs to lock in more than the 51st delegate, right? can he unlock at any time and sell all his coins or is it locked for a certain amount of time
Note that DPoS doesn't actually involve pools. It's a delegate's decision to profit share or not and sort out payout. Ark has fewer delegates, so there's more incentive required to vote for a delegate (plus 1 ARK=1 Vote). Take a look at Lisk, same concept, but only 3(?) pools at 98 solo delegates.
If i need to format my PC and reinstall ark wallet, how do I get back into my account? Do I need to save the adress too? or is the passphrase my account at the same time? when I click on import account it says to write in the passphrase, I dont need anythin else?
yeah it's a brain wallet passphrase produces your public address
so long as you have the passphrase, you can access the account from anywhere (edited)
good Inside the wallet, what is the Register: Offchain good for? I can create folders there. What could I use this for? cannabanana have no idea
you can better organize your account - but its local not on blockchain
watch only adress... to see what the remaining ark on my bittrex account are doing? or what could it be used for
adding any address you want to have look out for bittrex hot wallet, your friends account, ...
ex gf
she what shops she's spending your ark on
Second passphrase. If you create one when do u enter which one?
I set one as soon as I make a test deposit test deposit > second passphrase > the amount I want to send
I did not get it. Restoring wallet, sending ark When do u need which passphrase
when you send out or vote, it'll ask you for your first passphrase, then second
Ah both
second passphrase is produced from first passphrase, I think can't remember
So it is just a stonger key and nothing more? Or does it have other benefits?
it can be used for 2 key multisig, but for most cases it's just more security person A owns one passphrase, person B owns the second, neither can send out unless both provide their keys
Smartbridge needs to be implemented into other blockchains via a small code right? How could you realize that? Just asking developers to change their code? How can you involve bigger currencies into ark ecosystem, why should they care? :slightly_smiling_face: 4 replies Last reply about 21 hours ago View thread
You could do it through some smart contract in ethereum most likely new currencies forked from ark will somewhen have it integrated directly (once it is in Ark code) we will most likely test it with some sidechain or friendly smaller chain first somewhen
how would you link together with NEM, Bitcoin, PIVX, Ripple?
well then if it grows maybe some others get interested
you will contact the developers and ask them? I am not in the core team :smile:
you can join in developement of ark on github anyway
i think you might even get bounties if you do it will be more developement of "community features" I guess but we will see on what we will vote and what idea everyone has whatever helps the ark ecosystem
sure if a dev is here i will ask him again about linking to other blockchains thanks xD
your welcome
An ARK gaming platform release. Codename: A... (Q2-Q3 2017) what kind of gaming platform? like valve's steam? Live same streaming, personality broadcasting platform (Q3-Q4 2017) (youtube/twitch?)
where did you get that from?
whitepaper in this section: A​pollo​ - P2P Card Network Q2-Q4 2017 it says if there is at least 10.000 BTC raised during ARK-TEC (it wasnt i think?)... so probably it will take longer time... but what are these things?
i think the roadmap on is more updated ....
steam, youtube, twitch? ok
but not sure
what is NFC?
Near Field Communication Wikipedia Near field communication Near-field communication (NFC) is a set of communication protocols that enable two electronic devices, one of which is usually a portable device such as a smartphone, to establish communication by bringing them within 4 cm (1.6 in) of each other. NFC devices are used in contactless payment systems, similar to those used in credit cards and electronic ticket smartcards and allow mobile payment to replace/supplement these systems. NFC is used for social networking, for sharing contacts, photos, videos Show more… (Not automatically expanded because 8531x5344 is too large to display inline.)
like bluetooth for payment?
yeah similiar remember that a lot of stuff in whitepaper was if we would reach higher funding goals than we did
yeah i heard that
so a lot of this use cases will be postponed we are focusing on core first
the road map on is the most accurate roadmap now, right? the whitepaper is more like a very longtime vision
we are not funded like some of those latest ICOs raising 10m+
i know
yes most accurate on is on what we'll work on in the next 3-4 months
InterPlanetary File System (IPFS) - you are CURRENTLY working on a decentralized dropbox, decentralized Twitch Streaming, decentralized Data Hosting? is that correct? and this is to be finished 2017 approx.?
IPFS yes (which is kind of decentralized hosting) we are not working on Twitch that will require bigger funding at least not yet
okay so for now only decentralized dropbox... comparable to the concept of storjcoin i guess i didnt know ark has such huge ambitions. it will be a hard way, but i like huge ambitions. as soon as the first important features are realized this project will boom ----- Today May 4th, 2017 -----
I have a question regarding Proof of Work / Bitcoin (I know its not what this forum is about). Maybe somebody can answer me. What happens when all coins are mined, why should miners continue their work to confirm transactions etc?!
i have read it won't be enough to pay off the computer power? or fees needs to rise?
they make quite a nice chunk on fees as it is
okay well doesnt matter xD i guess my question-session will continue today which points of your roadmap (besides mainnet) are already done and where is the main focus (i see your roadmap @, but i guess you dont work on all silmutanously)?
Main focus is currently deployable testnets for startups we want to become hub for upcoming projects to start with Ark as base and build upon
like these new ethereum projects, but just for ark?
yeah, but they'll have more "in the own hands" not relaying on ARK network, but still able to communicate to it with SmartBridge if ETH fails all assets fail as they are bound on ETH single point of failure
hm in which scenario could eth fail what couldnt happen to ark / ark startups? (edited)
its hypothetical but if eth would present some kind of flaw in design all assets could be in danger ark startups will have their own blockchains with their own set of rules / delegates, ...
if eth changes something to their system, all others need to adapt, but @ ark they dont need to adapt because they still can communicate?
projects are running directly on ETH blockchain via smart contracts - Augur, Iconomi, TokenCard, ... so if something were to happen or some flaw was unravelled in ETH it could jeoparzide all this projects with Ark you start with codebase and build your own things around it or modify
ok, i cant imagine what could go wrong to be honest. but i think i understand what you try to say
well look at DAO and ETH split to ETC, ... whole crypto is still in experimental phase this is just the start like internet in the 90s
yes so this: Making ARK clone-able with push button deployment and linked to ARK’s Main Chain via SmartBridge. and this: Deployment of testnet clones for start-ups. is the foundation of the ark ecosystem? and there is the main focus as for now
yes currently in development and first to be presented to the public for test along with mobile wallets / wallet redisign - this is currently being worked on and partnership outside Ark as well, but I cannot get more into details on that
sure and what is already done? Mainnet launch and what else? wallet
Java , Python implementation which is huge if you are more into dev scene
yeah i read into the possibilities of that yesterday
more to come as well - we want Ark to be universally avail in most promising dev langauges so you could get in with language you are most comfy working in
i want to make my videos in english first, but HQ and then I talk about it in german lets say I want to create an ingame shop for Skins. How would I proceed (for dummies / beginner developers). I connect to the github? stupid question xD but well there are no stupid ones
if you'd want to utilize Ark for ingame shop you'd probably develop game in Java for mobile so you'd look over Javark and how you make calls to execute transcations, verify payments on blockchain, save data on blockchain, ...
submitted by Jarunik to ArkEcosystem [link] [comments]

Bitcoin Core 0.10.0 released | Wladimir | Feb 16 2015

Wladimir on Feb 16 2015:
Bitcoin Core version 0.10.0 is now available from:
This is a new major version release, bringing both new features and
bug fixes.
Please report bugs using the issue tracker at github:
The whole distribution is also available as torrent:
Upgrading and downgrading

How to Upgrade
If you are running an older version, shut it down. Wait until it has completely
shut down (which might take a few minutes for older versions), then run the
installer (on Windows) or just copy over /Applications/Bitcoin-Qt (on Mac) or
bitcoind/bitcoin-qt (on Linux).
Downgrading warning
Because release 0.10.0 makes use of headers-first synchronization and parallel
block download (see further), the block files and databases are not
backwards-compatible with older versions of Bitcoin Core or other software:
  • Blocks will be stored on disk out of order (in the order they are
received, really), which makes it incompatible with some tools or
other programs. Reindexing using earlier versions will also not work
anymore as a result of this.
  • The block index database will now hold headers for which no block is
stored on disk, which earlier versions won't support.
If you want to be able to downgrade smoothly, make a backup of your entire data
directory. Without this your node will need start syncing (or importing from
bootstrap.dat) anew afterwards. It is possible that the data from a completely
synchronised 0.10 node may be usable in older versions as-is, but this is not
supported and may break as soon as the older version attempts to reindex.
This does not affect wallet forward or backward compatibility.
Notable changes

Faster synchronization
Bitcoin Core now uses 'headers-first synchronization'. This means that we first
ask peers for block headers (a total of 27 megabytes, as of December 2014) and
validate those. In a second stage, when the headers have been discovered, we
download the blocks. However, as we already know about the whole chain in
advance, the blocks can be downloaded in parallel from all available peers.
In practice, this means a much faster and more robust synchronization. On
recent hardware with a decent network link, it can be as little as 3 hours
for an initial full synchronization. You may notice a slower progress in the
very first few minutes, when headers are still being fetched and verified, but
it should gain speed afterwards.
A few RPCs were added/updated as a result of this:
  • getblockchaininfo now returns the number of validated headers in addition to
the number of validated blocks.
  • getpeerinfo lists both the number of blocks and headers we know we have in
common with each peer. While synchronizing, the heights of the blocks that we
have requested from peers (but haven't received yet) are also listed as
  • A new RPC getchaintips lists all known branches of the block chain,
including those we only have headers for.
Transaction fee changes
This release automatically estimates how high a transaction fee (or how
high a priority) transactions require to be confirmed quickly. The default
settings will create transactions that confirm quickly; see the new
'txconfirmtarget' setting to control the tradeoff between fees and
confirmation times. Fees are added by default unless the 'sendfreetransactions'
setting is enabled.
Prior releases used hard-coded fees (and priorities), and would
sometimes create transactions that took a very long time to confirm.
Statistics used to estimate fees and priorities are saved in the
data directory in the fee_estimates.dat file just before
program shutdown, and are read in at startup.
New command line options for transaction fee changes:
  • -txconfirmtarget=n : create transactions that have enough fees (or priority)
so they are likely to begin confirmation within n blocks (default: 1). This setting
is over-ridden by the -paytxfee option.
  • -sendfreetransactions : Send transactions as zero-fee transactions if possible
(default: 0)
New RPC commands for fee estimation:
  • estimatefee nblocks : Returns approximate fee-per-1,000-bytes needed for
a transaction to begin confirmation within nblocks. Returns -1 if not enough
transactions have been observed to compute a good estimate.
  • estimatepriority nblocks : Returns approximate priority needed for
a zero-fee transaction to begin confirmation within nblocks. Returns -1 if not
enough free transactions have been observed to compute a good
RPC access control changes
Subnet matching for the purpose of access control is now done
by matching the binary network address, instead of with string wildcard matching.
For the user this means that -rpcallowip takes a subnet specification, which can be
  • a single IP address (e.g. or fe80::0012:3456:789a:bcde)
  • a network/CIDR (e.g. or fe80::0000/64)
  • a network/netmask (e.g. or fe80::0012:3456:789a:bcde/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff)
An arbitrary number of -rpcallow arguments can be given. An incoming connection will be accepted if its origin address
matches one of them.
For example:
| 0.9.x and before | 0.10.x |
| -rpcallowip= | -rpcallowip= (unchanged) |
| -rpcallowip=192.168.1.* | -rpcallowip= |
| -rpcallowip=192.168.* | -rpcallowip= |
| -rpcallowip=* (dangerous!) | -rpcallowip=::/0 (still dangerous!) |
Using wildcards will result in the rule being rejected with the following error in debug.log:
 Error: Invalid -rpcallowip subnet specification: *. Valid are a single IP (e.g., a network/netmask (e.g. or a network/CIDR (e.g. 
REST interface
A new HTTP API is exposed when running with the -rest flag, which allows
unauthenticated access to public node data.
It is served on the same port as RPC, but does not need a password, and uses
plain HTTP instead of JSON-RPC.
Assuming a local RPC server running on port 8332, it is possible to request:
In every case, EXT can be bin (for raw binary data), hex (for hex-encoded
binary) or json.
For more details, see the doc/ document in the repository.
RPC Server "Warm-Up" Mode
The RPC server is started earlier now, before most of the expensive
intialisations like loading the block index. It is available now almost
immediately after starting the process. However, until all initialisations
are done, it always returns an immediate error with code -28 to all calls.
This new behaviour can be useful for clients to know that a server is already
started and will be available soon (for instance, so that they do not
have to start it themselves).
Improved signing security
For 0.10 the security of signing against unusual attacks has been
improved by making the signatures constant time and deterministic.
This change is a result of switching signing to use libsecp256k1
instead of OpenSSL. Libsecp256k1 is a cryptographic library
optimized for the curve Bitcoin uses which was created by Bitcoin
Core developer Pieter Wuille.
There exist attacks[1] against most ECC implementations where an
attacker on shared virtual machine hardware could extract a private
key if they could cause a target to sign using the same key hundreds
of times. While using shared hosts and reusing keys are inadvisable
for other reasons, it's a better practice to avoid the exposure.
OpenSSL has code in their source repository for derandomization
and reduction in timing leaks that we've eagerly wanted to use for a
long time, but this functionality has still not made its
way into a released version of OpenSSL. Libsecp256k1 achieves
significantly stronger protection: As far as we're aware this is
the only deployed implementation of constant time signing for
the curve Bitcoin uses and we have reason to believe that
libsecp256k1 is better tested and more thoroughly reviewed
than the implementation in OpenSSL.
Watch-only wallet support
The wallet can now track transactions to and from wallets for which you know
all addresses (or scripts), even without the private keys.
This can be used to track payments without needing the private keys online on a
possibly vulnerable system. In addition, it can help for (manual) construction
of multisig transactions where you are only one of the signers.
One new RPC, importaddress, is added which functions similarly to
importprivkey, but instead takes an address or script (in hexadecimal) as
argument. After using it, outputs credited to this address or script are
considered to be received, and transactions consuming these outputs will be
considered to be sent.
The following RPCs have optional support for watch-only:
getbalance, listreceivedbyaddress, listreceivedbyaccount,
listtransactions, listaccounts, listsinceblock, gettransaction. See the
RPC documentation for those methods for more information.
Compared to using getrawtransaction, this mechanism does not require
-txindex, scales better, integrates better with the wallet, and is compatible
with future block chain pruning functionality. It does mean that all relevant
addresses need to added to the wallet before the payment, though.
Consensus library
Starting from 0.10.0, the Bitcoin Core distribution includes a consensus library.
The purpose of this library is to make the verification functionality that is
critical to Bitcoin's consensus available to other applications, e.g. to language
bindings such as [python-bitcoinlib]( or
alternative node implementations.
This library is called (or, .dll for Windows).
Its interface is defined in the C header [bitcoinconsensus.h](
In its initial version the API includes two functions:
  • bitcoinconsensus_verify_script verifies a script. It returns whether the indicated input of the provided serialized transaction
correctly spends the passed scriptPubKey under additional constraints indicated by flags
  • bitcoinconsensus_version returns the API version, currently at an experimental 0
The functionality is planned to be extended to e.g. UTXO management in upcoming releases, but the interface
for existing methods should remain stable.
Standard script rules relaxed for P2SH addresses
The IsStandard() rules have been almost completely removed for P2SH
redemption scripts, allowing applications to make use of any valid
script type, such as "n-of-m OR y", hash-locked oracle addresses, etc.
While the Bitcoin protocol has always supported these types of script,
actually using them on mainnet has been previously inconvenient as
standard Bitcoin Core nodes wouldn't relay them to miners, nor would
most miners include them in blocks they mined.
It has been observed that many of the RPC functions offered by bitcoind are
"pure functions", and operate independently of the bitcoind wallet. This
included many of the RPC "raw transaction" API functions, such as
bitcoin-tx is a newly introduced command line utility designed to enable easy
manipulation of bitcoin transactions. A summary of its operation may be
obtained via "bitcoin-tx --help" Transactions may be created or signed in a
manner similar to the RPC raw tx API. Transactions may be updated, deleting
inputs or outputs, or appending new inputs and outputs. Custom scripts may be
easily composed using a simple text notation, borrowed from the bitcoin test
This tool may be used for experimenting with new transaction types, signing
multi-party transactions, and many other uses. Long term, the goal is to
deprecate and remove "pure function" RPC API calls, as those do not require a
server round-trip to execute.
Other utilities "bitcoin-key" and "bitcoin-script" have been proposed, making
key and script operations easily accessible via command line.
Mining and relay policy enhancements
Bitcoin Core's block templates are now for version 3 blocks only, and any mining
software relying on its getblocktemplate must be updated in parallel to use
libblkmaker either version 0.4.2 or any version from 0.5.1 onward.
If you are solo mining, this will affect you the moment you upgrade Bitcoin
Core, which must be done prior to BIP66 achieving its 951/1001 status.
If you are mining with the stratum mining protocol: this does not affect you.
If you are mining with the getblocktemplate protocol to a pool: this will affect
you at the pool operator's discretion, which must be no later than BIP66
achieving its 951/1001 status.
The prioritisetransaction RPC method has been added to enable miners to
manipulate the priority of transactions on an individual basis.
Bitcoin Core now supports BIP 22 long polling, so mining software can be
notified immediately of new templates rather than having to poll periodically.
Support for BIP 23 block proposals is now available in Bitcoin Core's
getblocktemplate method. This enables miners to check the basic validity of
their next block before expending work on it, reducing risks of accidental
hardforks or mining invalid blocks.
Two new options to control mining policy:
  • -datacarrier=0/1 : Relay and mine "data carrier" (OP_RETURN) transactions
if this is 1.
  • -datacarriersize=n : Maximum size, in bytes, we consider acceptable for
"data carrier" outputs.
The relay policy has changed to more properly implement the desired behavior of not
relaying free (or very low fee) transactions unless they have a priority above the
AllowFreeThreshold(), in which case they are relayed subject to the rate limiter.
BIP 66: strict DER encoding for signatures
Bitcoin Core 0.10 implements BIP 66, which introduces block version 3, and a new
consensus rule, which prohibits non-DER signatures. Such transactions have been
non-standard since Bitcoin v0.8.0 (released in February 2013), but were
technically still permitted inside blocks.
This change breaks the dependency on OpenSSL's signature parsing, and is
required if implementations would want to remove all of OpenSSL from the
consensus code.
The same miner-voting mechanism as in BIP 34 is used: when 751 out of a
sequence of 1001 blocks have version number 3 or higher, the new consensus
rule becomes active for those blocks. When 951 out of a sequence of 1001
blocks have version number 3 or higher, it becomes mandatory for all blocks.
Backward compatibility with current mining software is NOT provided, thus miners
should read the first paragraph of "Mining and relay policy enhancements" above.
0.10.0 Change log

Detailed release notes follow. This overview includes changes that affect external
behavior, not code moves, refactors or string updates.
  • f923c07 Support IPv6 lookup in bitcoin-cli even when IPv6 only bound on localhost
  • b641c9c Fix addnode "onetry": Connect with OpenNetworkConnection
  • 171ca77 estimatefee / estimatepriority RPC methods
  • b750cf1 Remove cli functionality from bitcoind
  • f6984e8 Add "chain" to getmininginfo, improve help in getblockchaininfo
  • 99ddc6c Add nLocalServices info to RPC getinfo
  • cf0c47b Remove getwork() RPC call
  • 2a72d45 prioritisetransaction
  • e44fea5 Add an option -datacarrier to allow users to disable relaying/mining data carrier transactions
  • 2ec5a3d Prevent easy RPC memory exhaustion attack
  • d4640d7 Added argument to getbalance to include watchonly addresses and fixed errors in balance calculation
  • 83f3543 Added argument to listaccounts to include watchonly addresses
  • 952877e Showing 'involvesWatchonly' property for transactions returned by 'listtransactions' and 'listsinceblock'. It is only appended when the transaction involves a watchonly address
  • d7d5d23 Added argument to listtransactions and listsinceblock to include watchonly addresses
  • f87ba3d added includeWatchonly argument to 'gettransaction' because it affects balance calculation
  • 0fa2f88 added includedWatchonly argument to listreceivedbyaddress/...account
  • 6c37f7f getrawchangeaddress: fail when keypool exhausted and wallet locked
  • ff6a7af getblocktemplate: longpolling support
  • c4a321f Add peerid to getpeerinfo to allow correlation with the logs
  • 1b4568c Add vout to ListTransactions output
  • b33bd7a Implement "getchaintips" RPC command to monitor blockchain forks
  • 733177e Remove size limit in RPC client, keep it in server
  • 6b5b7cb Categorize rpc help overview
  • 6f2c26a Closely track mempool byte total. Add "getmempoolinfo" RPC
  • aa82795 Add detailed network info to getnetworkinfo RPC
  • 01094bd Don't reveal whether password is <20 or >20 characters in RPC
  • 57153d4 rpc: Compute number of confirmations of a block from block height
  • ff36cbe getnetworkinfo: export local node's client sub-version string
  • d14d7de SanitizeString: allow '(' and ')'
  • 31d6390 Fixed setaccount accepting foreign address
  • b5ec5fe update getnetworkinfo help with subversion
  • ad6e601 RPC additions after headers-first
  • 33dfbf5 rpc: Fix leveldb iterator leak, and flush before gettxoutsetinfo
  • 2aa6329 Enable customising node policy for datacarrier data size with a -datacarriersize option
  • f877aaa submitblock: Use a temporary CValidationState to determine accurately the outcome of ProcessBlock
  • e69a587 submitblock: Support for returning specific rejection reasons
  • af82884 Add "warmup mode" for RPC server
  • e2655e0 Add unauthenticated HTTP REST interface to public blockchain data
  • 683dc40 Disable SSLv3 (in favor of TLS) for the RPC client and server
  • 44b4c0d signrawtransaction: validate private key
  • 9765a50 Implement BIP 23 Block Proposal
  • f9de17e Add warning comment to getinfo
Command-line options:
  • ee21912 Use netmasks instead of wildcards for IP address matching
  • deb3572 Add -rpcbind option to allow binding RPC port on a specific interface
  • 96b733e Add -version option to get just the version
  • 1569353 Add -stopafterblockimport option
  • 77cbd46 Let -zapwallettxes recover transaction meta data
  • 1c750db remove -tor compatibility code (only allow -onion)
  • 4aaa017 rework help messages for fee-related options
  • 4278b1d Clarify error message when invalid -rpcallowip
  • 6b407e4 -datadir is now allowed in config files
  • bdd5b58 Add option -sysperms to disable 077 umask (create new files with system default umask)
  • cbe39a3 Add "bitcoin-tx" command line utility and supporting modules
  • dbca89b Trigger -alertnotify if network is upgrading without you
  • ad96e7c Make -reindex cope with out-of-order blocks
  • 16d5194 Skip reindexed blocks individually
  • ec01243 --tracerpc option for regression tests
  • f654f00 Change -genproclimit default to 1
  • 3c77714 Make -proxy set all network types, avoiding a connect leak
  • 57be955 Remove -printblock, -printblocktree, and -printblockindex
  • ad3d208 remove -maxorphanblocks config parameter since it is no longer functional
Block and transaction handling:
  • 7a0e84d ProcessGetData(): abort if a block file is missing from disk
  • 8c93bf4 LoadBlockIndexDB(): Require block db reindex if any blk*.dat files are missing
  • 77339e5 Get rid of the static chainMostWork (optimization)
  • 4e0eed8 Allow ActivateBestChain to release its lock on cs_main
  • 18e7216 Push cs_mains down in ProcessBlock
  • fa126ef Avoid undefined behavior using CFlatData in CScript serialization
  • 7f3b4e9 Relax IsStandard rules for pay-to-script-hash transactions
  • c9a0918 Add a skiplist to the CBlockIndex structure
  • bc42503 Use unordered_map for CCoinsViewCache with salted hash (optimization)
  • d4d3fbd Do not flush the cache after every block outside of IBD (optimization)
  • ad08d0b Bugfix: make CCoinsViewMemPool support pruned entries in underlying cache
  • 5734d4d Only remove actualy failed blocks from setBlockIndexValid
  • d70bc52 Rework block processing benchmark code
  • 714a3e6 Only keep setBlockIndexValid entries that are possible improvements
  • ea100c7 Reduce maximum coinscache size during verification (reduce memory usage)
  • 4fad8e6 Reject transactions with excessive numbers of sigops
  • b0875eb Allow BatchWrite to destroy its input, reducing copying (optimization)
  • 92bb6f2 Bypass reloading blocks from disk (optimization)
  • 2e28031 Perform CVerifyDB on pcoinsdbview instead of pcoinsTip (reduce memory usage)
  • ab15b2e Avoid copying undo data (optimization)
  • 341735e Headers-first synchronization
  • afc32c5 Fix rebuild-chainstate feature and improve its performance
  • e11b2ce Fix large reorgs
  • ed6d1a2 Keep information about all block files in memory
  • a48f2d6 Abstract context-dependent block checking from acceptance
  • 7e615f5 Fixed mempool sync after sending a transaction
  • 51ce901 Improve chainstate/blockindex disk writing policy
  • a206950 Introduce separate flushing modes
  • 9ec75c5 Add a locking mechanism to IsInitialBlockDownload to ensure it never goes from false to true
  • 868d041 Remove coinbase-dependant transactions during reorg
  • 723d12c Remove txn which are invalidated by coinbase maturity during reorg
  • 0cb8763 Check against MANDATORY flags prior to accepting to mempool
  • 8446262 Reject headers that build on an invalid parent
  • 008138c Bugfix: only track UTXO modification after lookup
P2P protocol and network code:
  • f80cffa Do not trigger a DoS ban if SCRIPT_VERIFY_NULLDUMMY fails
  • c30329a Add testnet DNS seed of Alex Kotenko
  • 45a4baf Add testnet DNS seed of Andreas Schildbach
  • f1920e8 Ping automatically every 2 minutes (unconditionally)
  • 806fd19 Allocate receive buffers in on the fly
  • 6ecf3ed Display unknown commands received
  • aa81564 Track peers' available blocks
  • caf6150 Use async name resolving to improve net thread responsiveness
  • 9f4da19 Use pong receive time rather than processing time
  • 0127a9b remove SOCKS4 support from core and GUI, use SOCKS5
  • 40f5cb8 Send rejects and apply DoS scoring for errors in direct block validation
  • dc942e6 Introduce whitelisted peers
  • c994d2e prevent SOCKET leak in BindListenPort()
  • a60120e Add built-in seeds for .onion
  • 60dc8e4 Allow -onlynet=onion to be used
  • 3a56de7 addrman: Do not propagate obviously poor addresses onto the network
  • 6050ab6 netbase: Make SOCKS5 negotiation interruptible
  • 604ee2a Remove tx from AlreadyAskedFor list once we receive it, not when we process it
  • efad808 Avoid reject message feedback loops
  • 71697f9 Separate protocol versioning from clientversion
  • 20a5f61 Don't relay alerts to peers before version negotiation
  • b4ee0bd Introduce preferred download peers
  • 845c86d Do not use third party services for IP detection
  • 12a49ca Limit the number of new addressses to accumulate
  • 35e408f Regard connection failures as attempt for addrman
  • a3a7317 Introduce 10 minute block download timeout
  • 3022e7d Require sufficent priority for relay of free transactions
  • 58fda4d Update seed IPs, based on crawler data
  • 18021d0 Remove from dnsseeds.
  • 6fd7ef2 Also switch the (unused) verification code to low-s instead of even-s
  • 584a358 Do merkle root and txid duplicates check simultaneously
  • 217a5c9 When transaction outputs exceed inputs, show the offending amounts so as to aid debugging
  • f74fc9b Print input index when signature validation fails, to aid debugging
  • 6fd59ee script.h: set_vch() should shift a >32 bit value
  • d752ba8 Add SCRIPT_VERIFY_SIGPUSHONLY (BIP62 rule 2) (test only)
  • 698c6ab Add SCRIPT_VERIFY_MINIMALDATA (BIP62 rules 3 and 4) (test only)
  • ab9edbd script: create sane error return codes for script validation and remove logging
  • 219a147 script: check ScriptError values in script tests
  • 0391423 Discourage NOPs reserved for soft-fork upgrades
  • 98b135f Make STRICTENC invalid pubkeys fail the script rather than the opcode
  • 307f7d4 Report script evaluation failures in log and reject messages
  • ace39db consensus: guard against openssl's new strict DER checks
  • 12b7c44 Improve robustness of DER recoding code
  • 76ce5c8 fail immediately on an empty signature
Build system:
  • f25e3ad Fix build in OS X 10.9
  • 65e8ba4 build: Switch to non-recursive make
  • 460b32d build: fix broken boost chrono check on some platforms
  • 9ce0774 build: Fix windows configure when using --with-qt-libdir
  • ea96475 build: Add mention of --disable-wallet to bdb48 error messages
  • 1dec09b depends: add shared dependency builder
  • c101c76 build: Add --with-utils (bitcoin-cli and bitcoin-tx, default=yes). Help string consistency tweaks. Target sanity check fix
  • e432a5f build: add option for reducing exports (v2)
  • 6134b43 Fixing condition 'sabotaging' MSVC build
  • af0bd5e osx: fix signing to make Gatekeeper happy (again)
  • a7d1f03 build: fix dynamic boost check when --with-boost= is used
  • d5fd094 build: fix qt test build when libprotobuf is in a non-standard path
  • 2cf5f16 Add libbitcoinconsensus library
  • 914868a build: add a deterministic dmg signer
  • 2d375fe depends: bump openssl to 1.0.1k
  • b7a4ecc Build: Only check for boost when building code that requires it
  • b33d1f5 Use fee/priority estimates in wallet CreateTransaction
  • 4b7b1bb Sanity checks for estimates
  • c898846 Add support for watch-only addresses
  • d5087d1 Use script matching rather than destination matching for watch-only
  • d88af56 Fee fixes
  • a35b55b Dont run full check every time we decrypt wallet
  • 3a7c348 Fix make_change to not create half-satoshis
  • f606bb9 fix a possible memory leak in CWalletDB::Recover
  • 870da77 fix possible memory leaks in CWallet::EncryptWallet
  • ccca27a Watch-only fixes
  • 9b1627d [Wallet] Reduce minTxFee for transaction creation to 1000 satoshis
  • a53fd41 Deterministic signing
  • 15ad0b5 Apply AreSane() checks to the fees from the network
  • 11855c1 Enforce minRelayTxFee on wallet created tx and add a maxtxfee option
  • c21c74b osx: Fix missing dock menu with qt5
  • b90711c Fix Transaction details shows wrong To:
  • 516053c Make links in 'About Bitcoin Core' clickable
  • bdc83e8 Ensure payment request network matches client network
  • 65f78a1 Add GUI view of peer information
  • 06a91d9 VerifyDB progress reporting
  • fe6bff2 Add BerkeleyDB version info to RPCConsole
  • b917555 PeerTableModel: Fix potential deadlock. #4296
  • dff0e3b Improve rpc console history behavior
  • 95a9383 Remove CENT-fee-rule from coin control completely
  • 56b07d2 Allow setting listen via GUI
  • d95ba75 Log messages with type>QtDebugMsg as non-debug
  • 8969828 New status bar Unit Display Control and related changes
  • 674c070 seed OpenSSL PNRG with Windows event data
  • 509f926 Payment request parsing on startup now only changes network if a valid network name is specified
  • acd432b Prevent balloon-spam after rescan
  • 7007402 Implement SI-style (thin space) thoudands separator
  • 91cce17 Use fixed-point arithmetic in amount spinbox
  • bdba2dd Remove an obscure option no-one cares about
  • bd0aa10 Replace the temporary file hack currently used to change Bitcoin-Qt's dock icon (OS X) with a buffer-based solution
  • 94e1b9e Re-work overviewpage UI
  • 8bfdc9a Better looking trayicon
  • b197bf3 disable tray interactions when client model set to 0
  • 1c5f0af Add column Watch-only to transactions list
  • 21f139b Fix tablet crash. closes #4854
  • e84843c Broken addresses on command line no longer trigger testnet
  • a49f11d Change splash screen to normal window
  • 1f9be98 Disable App Nap on OSX 10.9+
  • 27c3e91 Add proxy to options overridden if necessary
  • 4bd1185 Allow "emergency" shutdown during startup
  • d52f072 Don't show wallet options in the preferences menu when running with -disablewallet
  • 6093aa1 Qt: QProgressBar CPU-Issue workaround
  • 0ed9675 [Wallet] Add global boolean whether to send free transactions (default=true)
  • ed3e5e4 [Wallet] Add global boolean whether to pay at least the custom fee (default=true)
  • e7876b2 [Wallet] Prevent user from paying a non-sense fee
  • c1c9d5b Add Smartfee to GUI
  • e0a25c5 Make askpassphrase dialog behave more sanely
  • 94b362d On close of splashscreen interrupt verifyDB
  • b790d13 English translation update
  • 8543b0d Correct tooltip on address book page
  • b41e594 Fix script test handling of empty scripts
  • d3a33fc Test CHECKMULTISIG with m == 0 and n == 0
  • 29c1749 Let tx (in)valid tests use any SCRIPT_VERIFY flag
  • 6380180 Add rejection of non-null CHECKMULTISIG dummy values
  • 21bf3d2 Add tests for BoostAsioToCNetAddr
  • b5ad5e7 Add Python test for -rpcbind and -rpcallowip
  • 9ec0306 Add CODESEPARATOFindAndDelete() tests
  • 75ebced Added many rpc wallet tests
  • 0193fb8 Allow multiple regression tests to run at once
  • 92a6220 Hook up sanity checks
  • 3820e01 Extend and move all crypto tests to crypto_tests.cpp
  • 3f9a019 added list/get received by address/ account tests
  • a90689f Remove timing-based signature cache unit test
  • 236982c Add skiplist unit tests
  • f4b00be Add CChain::GetLocator() unit test
  • b45a6e8 Add test for getblocktemplate longpolling
  • cdf305e Set -discover=0 in regtest framework
  • ed02282 additional test for OP_SIZE in script_valid.json
  • 0072d98 script tests: BOOLAND, BOOLOR decode to integer
  • 833ff16 script tests: values that overflow to 0 are true
  • 4cac5db script tests: value with trailing 0x00 is true
  • 89101c6 script test: test case for 5-byte bools
  • d2d9dc0 script tests: add tests for CHECKMULTISIG limits
  • d789386 Add "it works" test for bitcoin-tx
  • df4d61e Add bitcoin-tx tests
  • aa41ac2 Test IsPushOnly() with invalid push
  • 6022b5d Make script_{valid,invalid}.json validation flags configurable
  • 8138cbe Add automatic script test generation, and actual checksig tests
  • ed27e53 Add coins_tests with a large randomized CCoinViewCache test
  • 9df9cf5 Make SCRIPT_VERIFY_STRICTENC compatible with BIP62
  • dcb9846 Extend getchaintips RPC test
  • 554147a Ensure MINIMALDATA invalid tests can only fail one way
  • dfeec18 Test every numeric-accepting opcode for correct handling of the numeric minimal encoding rule
  • 2b62e17 Clearly separate PUSHDATA and numeric argument MINIMALDATA tests
  • 16d78bd Add valid invert of invalid every numeric opcode tests
  • f635269 tests: enable alertnotify test for Windows
  • 7a41614 tests: allow rpc-tests to get filenames for bitcoind and bitcoin-cli from the environment
  • 5122ea7 tests: fix on windows
  • fa7f8cd tests: remove old pull-tester scripts
  • 7667850 tests: replace the old (unused since Travis) tests with new rpc test scripts
  • f4e0aef Do signature-s negation inside the tests
  • 1837987 Optimize -regtest setgenerate block generation
  • 2db4c8a Fix node ranges in the test framework
  • a8b2ce5 regression test only setmocktime RPC call
  • daf03e7 RPC tests: create initial chain with specific timestamps
  • 8656dbb Port/fix regression test
  • ca81587 Test the exact order of CHECKMULTISIG sig/pubkey evaluation
  • 7357893 Prioritize and display -testsafemode status in UI
  • f321d6b Add key generation/verification to ECC sanity check
  • 132ea9b miner_tests: Disable checkpoints so they don't fail the subsidy-change test
  • bc6cb41 QA RPC tests: Add tests block block proposals
  • f67a9ce Use deterministically generated script tests
  • 11d7a7d [RPC] add rpc-test for http keep-alive (persistent connections)
  • 34318d7 RPC-test based on invalidateblock for mempool coinbase spends
  • 76ec867 Use actually valid transactions for script tests
  • c8589bf Add actual signature tests
  • e2677d7 Fix smartfees test for change to relay policy
  • 263b65e tests: run sanity checks in tests too
  • 122549f Fix incorrect checkpoint data for testnet3
  • 5bd02cf Log used config file to debug.log on startup
  • 68ba85f Updated Debian example bitcoin.conf with config from wiki + removed some cruft and updated comments
  • e5ee8f0 Remove -beta suffix
  • 38405ac Add comment regarding experimental-use service bits
  • be873f6 Issue warning if collecting RandSeed data failed
  • 8ae973c Allocate more space if necessary in RandSeedAddPerfMon
  • 675bcd5 Correct comment for 15-of-15 p2sh script size
  • fda3fed libsecp256k1 integration
  • 2e36866 Show nodeid instead of addresses in log (for anonymity) unless otherwise requested
  • cd01a5e Enable paranoid corruption checks in LevelDB >= 1.16
  • 9365937 Add comment about never updating nTimeOffset past 199 samples
  • 403c1bf contrib: remove getwork-based pyminer (as getwork API call has been removed)
  • 0c3e101 contrib: Added systemd .service file in order to help distributions integrate bitcoind
  • 0a0878d doc: Add new DNSseed policy
  • 2887bff Update coding style and add .clang-format
  • 5cbda4f Changed LevelDB cursors to use scoped pointers to ensure destruction when going out of scope
  • b4a72a7 contrib/linearize: split output files based on new-timestamp-year or max-file-size
  • e982b57 Use explicit fflush() instead of setvbuf()
  • 234bfbf contrib: Add init scripts and docs for Upstart and OpenRC
  • 01c2807 Add warning about the merkle-tree algorithm duplicate txid flaw
  • d6712db Also create pid file in non-daemon mode
  • 772ab0e contrib: use batched JSON-RPC in linarize-hashes (optimization)
  • 7ab4358 Update bash-completion for v0.10
  • 6e6a36c contrib: show pull # in prompt for github-merge script
  • 5b9f842 Upgrade leveldb to 1.18, make chainstate databases compatible between ARM and x86 (issue #2293)
  • 4e7c219 Catch UTXO set read errors and shutdown
  • 867c600 Catch LevelDB errors during flush
  • 06ca065 Fix CScriptID(const CScript& in) in empty script case

Thanks to everyone who contributed to this release:
  • 21E14
  • Adam Weiss
  • Aitor Pazos
  • Alexander Jeng
  • Alex Morcos
  • Alon Muroch
  • Andreas Schildbach
  • Andrew Poelstra
  • Andy Alness
  • Ashley Holman
  • Benedict Chan
  • Ben Holden-Crowther
  • Bryan Bishop
  • BtcDrak
  • Christian von Roques
  • Clinton Christian
  • Cory Fields
  • Cozz Lovan
  • daniel
  • Daniel Kraft
  • David Hill
  • Derek701
  • dexX7
  • dllud
  • Dominyk Tiller
  • Doug
  • elichai
  • elkingtowa
  • ENikS
  • Eric Shaw
  • Federico Bond
  • Francis GASCHET
  • Gavin Andresen
  • Giuseppe Mazzotta
  • Glenn Willen
  • Gregory Maxwell
  • gubatron
  • HarryWu
  • himynameismartin
  • Huang Le
  • Ian Carroll
  • imharrywu
  • Jameson Lopp
  • Janusz Lenar
  • JaSK
  • Jeff Garzik
  • JL2035
  • Johnathan Corgan
  • Jonas Schnelli
  • jtimon
  • Julian Haight
  • Kamil Domanski
  • kazcw
  • kevin
  • kiwigb
  • Kosta Zertsekel
  • LongShao007
  • Luke Dashjr
  • Mark Friedenbach
  • Mathy Vanvoorden
  • Matt Corallo
  • Matthew Bogosian
  • Micha
  • Michael Ford
  • Mike Hearn
  • mrbandrews
  • mruddy
  • ntrgn
  • Otto Allmendinger
  • paveljanik
  • Pavel Vasin
  • Peter Todd
  • phantomcircuit
  • Philip Kaufmann
  • Pieter Wuille
  • pryds
  • randy-waterhouse
  • R E Broadley
  • Rose Toomey
  • Ross Nicoll
  • Roy Badami
  • Ruben Dario Ponticelli
  • Rune K. Svendsen
  • Ryan X. Charles
  • Saivann
  • sandakersmann
  • SergioDemianLerner
  • shshshsh
  • sinetek
  • Stuart Cardall
  • Suhas Daftuar
  • Tawanda Kembo
  • Teran McKinney
  • tm314159
  • Tom Harding
  • Trevin Hofmann
  • Whit J
  • Wladimir J. van der Laan
  • Yoichi Hirai
  • Zak Wilcox
As well as everyone that helped translating on [Transifex](
Also lots of thanks to the website team David A. Harding and Saivann Carignan.
submitted by bitcoin-devlist-bot to bitcoin_devlist [link] [comments]

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