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Questions tagged [hardforks]

A hardfork is any backwards-incompatible change to the Ethereum protocol, such that a client will need to upgrade in order to remain on the network. This tag is for actual and proposed hardforks, as well as the issues relating to them.

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Casper, Serenity, Constantinople, Ethereum 2.0

I hear alot about the terms: Casper Serenity Constantinople Ethereum 2.0 At some point I thought that all are the same, the next release of Ethereum, but apparently there’s an upcoming fixes patches ...
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Upcoming Ethereum hard fork and ERC-20 token as fiat money

The ethereum network may face a new hard fork with the release of Ethereum 2.0 (scalability fixes) Is it true that we might have two parallel ethereum networks each running a different consensus ...
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What happened in the Ropsten hardfork from Byzantium to Constantinople?

What were the consensus issues during the Constantinople hardfork in the Ropsten testnet? One noted consensus issue is: geth and parity have been in noticeable disagreement regarding block ...
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During the POW/POS transition, why would a POW miner choose to mine on the chain with the POS consensus algorithm?

As the title says, what incentive does a POW miner have to mine on the hybrid POS chain? They would, effectively, be removing their own economic incentive from the consensus mechanism. I understand ...
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Ethereum Hard Fork and blockchain

If i do Ethereum Hard Fork to build DApp - Does it need to be on Ethereum or could be a separate blockchain system? If we build a separate blockchain system, what is the advantage of hard-forking from ...
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How vote progressed on the DAO attack

Historical question,, How was voted when the DAO attacked and faced whether hard-folk should have done which Ethereum-classic finally born? wondered if it was made decision on on-chain or off-chain. ...
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What do the keys 'balance', 'extraBalance' and 'extraBalanceAccount' signify in the dao-hardfork

The list of 58 affected accounts during the DAO hardfork is available here: https://github.com/ethereum/go-ethereum/blob/5f55d95aea433ef97c48ae927835d833772350de/params/dao.go#L67 The list has four ...
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Why does a permanent chain split occur only in a Hard Fork?

Have read a number of articles on what hard fork and soft fork actually are. But couldn't really get the essence of it. My understanding is Hard Fork brings a change in the core Blockchain code (...
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Question about hard fork

I'm learning some hard fork source code(like Etherzero). Could anyone please help me to handle questions as below: How to mine the first hard fork block, for example, if I want to make hard fork at ...
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Role of nodes and miners in governance

What are the different roles of miners and nodes for protocol updates? Which group is more important?
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Is there any way to find all of the Sep/Oct 2016 DDos accounts?

This EIP allowed for the cleaning up of the nearly 20 million DDos accounts created during the September/October 2016 DDos attack. The solution had two parts: (1) the node code had to be changed to ...
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How to start a new blockchain/fork? [closed]

I really like whats going on in the space, and have an idea of my own for a blockchain. I am aware there are ERC20 tokens - which should help me build on top of Ethereum. The concept i have in mind ...
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How do transactions know how to behave based on the genesis block?

Say I am a miner, and my genesis block on the mainnet has configuration X. A transaction comes in for me to mine. How does my Ethereum client confirm that transaction adheres to all the standards set ...
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How can i create a hard fork of ethereum [duplicate]

I'm new on the blockchain and curious to know that how can i create my own public blockchain like ethereum, or how can i make a hardfork of this network. implementing all the standards that ethereum ...
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Does ETH and ETC uses the same network ID?

Can someone tell me what happen after the hardfork (due to DAO attack)? There are 2 ethereum cryptos after the fork, so there should be 2 different network. Are they using the same network ID? How do ...
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Bancor Tokens stuck after Parity update

I have installed the latest Parity version 1.8.5 on a new computer and uploaded a json file I extracted from my other computer's Parity-Wallet (version 1.7, not updated since fork - It was stuck at ...
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A question about EtherZero

I'm reading about the hard fork EtherZero, in particular the section about how to get ETZ money. Can someone explain me what does it means "Derive the private key from the private key-approving ...
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When ETH Hardforks do the tokens as well?

If the ETH chain hard-forked into EthereumGold or something, would all of the ERC20 tokens and what not running on ETH at the time fork into the new blockchain as well? I'm 95% sure the answer is ...
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My question is about forks in general. If I have a portion of a coin do I get the exact portion of that new coin?

my question is about forks in general. If I have a portion of coins and it gets forked do I get the exact amount of the new forked coin?
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How to fork Ethereum from the current state?

I've read a lot of tutorials and guides that teach how to set up your own private network from scratch. However, how would I do that from the current state of the blockchain? Instead of generating a ...
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154 views

What happens to ICO tokens on the Ethereum chain after a hardfork? Are they valid on both chains?

With the Ethereum Metropolis hard fork coming up, what happens to ICO tokens like Steemit and all the others built on top of the Ethereum network? Do they automatically fork too?
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What improvements will the upcoming Byzantium fork bring to Smart Contract development?

The Ethereum Team announced recently that the Byzantium fork will happen on October 16. This will be the first phase of the Metropolis upgrade. What improvements will the Byzantium bring to Smart ...
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Moved presale ether after the fork how do I split?

I bought ether at the presale and moved it to another address after the fork. I still have the original wallet backup, but I'm uncertian on the process to claim ETC. When I scan my Address on Ethereum ...
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How to fix a deployed contract that was hit by a 'breaking change'

A developer of Remix told me that if a deployed contract suffers from a breaking change, then it may become a "dead" contract. Which means that it has become unaccessible in its runtime environment. ...
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Mining on Ropsten/Testnet - Not Working Post Hard Fork

Ever since the ropsten hard fork and upgrading to geth 1.7.0, I am unable to mine for test ether. Geth Version: 1.7.0-stable Before the hard fork, I could manage to mine a few blocks each day. Post ...
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Byzantium related homework required for pool operators and developers

Is there a summary of what code and/or configuration changes need to be implemented by mining pools and associated code to properly support the upcoming hard-fork? Do packages like ethash need to be ...
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Ethereum hard-fork: Geth Syncing Issue

I have been running a geth testnet instance for the last 2 months and learning this. But after the hard-fork i have seen the syncing to be extremely slow. I updated geth to Version: 1.7.0-stable. eth....
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Are new Opcodes approved in EIP's implemented in Solidity before they are introduced in a hardfork?

REVERT, STATICCALL, RETURNDATASIZE and RETURNDATACOPY are all approved and pending the next Ethereum hardfork as specified here However, the Solidity changelogs shows all 4 of these opcodes entering ...
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Where are the Ethers landing if not in Wallet?

I get paid from genesis mining couple of times in a month and the pay-outs are transferred to MyEtherWallet account. The status remains 0 ETHs till date. In MyEtherWallet account the displayed ...
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flag provided but not defined: -oppose-dao-fork

I just tried synching to the Ethereum Classic blockchain with geth --oppose-dao-fork. I was using Ubutntu PPAs but I hit an error at a certain (can't find which one now) which was a known issue with ...
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Will metropolis delay the difficulty bomb?

Vitalik said the "ice age will be delayed anyways" (with metropolis). It's not that important or applicable either way, though on the other hand that given network going to be mucking around with ...
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Cold Storage after a Hard Fork?

If you create a cold storage account, by following the method described here for example: How to send ether to a cold storage account? And subsequently, a hard fork takes place on the Ethereum ...
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Please provide a summary of the Ethereum hard forks

The question Please confirm what the hard forks of Ethereum were and when they took place was asked on Reddit by u/Tykerr.
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Are eth transactions still replayed on the etc chain?

I have read about EIP 155. I see that the main chain, test nets, and ETC were asked to implement EIP 155. If just ETH implemented EIP 155, wouldn't that have been enough to prevent ETC from being ...
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How to hard fork a private network?

We have a private network with geth 1.4.18 clients. We have 3 miners (each owned and managed by a different company) and a number of sync-only nodes. Now we would like to upgrade the network to 1.5.5. ...
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Double checking about the TheDAO hard fork

Been a bit out the loop but I think I'm fairly caught up but want to check. I moved my presale ether to another wallet that has never made a transaction from it. As I understand, that wallet now ...
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How to ensure the Mist GUI client is running on the new, hard-forked blockchain?

I installed a while ago geth 1.4.17 from the git repo (together with cpp-ethereum, the genoil CUDA miner, and the Mist GUI wallet). However, now I can't figure for the life of me how to upgrade geth ...
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Problems syncing wallet

I have been unsuccessful in trying to sync a new wallet or mist. I deleted the blockchain data and started over and it seemed to be syncing quite fast again, was more than halfway done in a few hours. ...
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How does a hard fork rollback transactions?

I'm new to ethereum. I am confused of how hard fork works in detail. I read many answers, like: https://ethereum.stackexchange.com/a/6390 https://ethereum.stackexchange.com/a/6269 In the first link, ...
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Ethereum Dos fork [duplicate]

Yesterday the Ethereum project made a fork. Was it a soft or hard fork? How did the attacker perform his attack?
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116 views

Is there any risk in receiving ETH in a pre-hard fork account having equal amounts of ETH and ETC?

As written in the title, I am wondering if doing this would be safe, or if there's anything else I should be aware about. I want to buy ETH via Kraken and send it to that account. I've been reading ...
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489 views

DDOS attack against Ethereum

Ethereum project has become a victime of Ddos attack, slowing down the transactions and giving priviliges to attackers to mine blocks. So instead correcting bugs in geth or parity is there any robust ...
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Ethereum/Blockchain versioning and update

I've noticed the hard fork, there's some mechanism in the code to ensure and enforce the node to run the updated version. The mechanism is so called "consensus challenge". What is this indeed? Some ...
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A terse description of the theDAO hardfork

As I understand it, at block 1920000 the blockchain was forked and there are now two blockchain strands; ETH (hard-forked) or ETC (non-hard-forked) blockchain. This is known as "the DAO hardfork". ...
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Synchronisation using geth; DAO fork-check, dropping is the only message recieved

I'm attempting to synchronise with the blockchain using geth on Win7 64bit. Presently pretty much all I'm getting is repeats of the same message; timed out DAO fork-check, dropping (see bottom). ...
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When will the Baddies have access to the hacked funds on the Ethereum Classic chain?

The Baddies drained 3641694.241898506992612606 ETH via The DAO's child DAO #59. When will the Baddies have access to the hacked funds on the Ethereum Classic chain? See also: Which split proposal ...
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How do I convert my The DAO tokens into ethers on the Ethereum Classic chain?

According to Whitehat Withdrawal contract - Update and Next Steps and Whitehat Withdrawal contract - Last update before deployment, the Goodies will be deploying the withdrawal contracts whetcwithdraw....
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How can I verify that my The DAO token balance is correct when the Goodies provide an ETC refund on the Ethereum Classic chain?

From the blog post The White Hats and DAO Wars: Behind the Scenes, the Goodies intend to: develop the smart contracts that will be used to distribute ETC to the addresses holding DAO Tokens at ...
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Why the DAO hacker could single handedly crash the ETC market many times over? [closed]

Disclosure: I started to read about crypto-coins a couple days ago. I read in this post comments that the DAO hacker, who holds many ETC (non-forked chain), can crash the market for good and end ETC ...
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What are some examples from Bitcoin or other chains of hard forks similar to the DAO-refund fork?

The changes made to the chain by the hard-fork was a one-time balance modification to several accounts. As of block 1920000, the difference between the state tries of the two forks was in the balance ...