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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It possible to hard fork a private network without resyncing chain from scratch?

I am able to hard fork my private chain into first Constantinople and than to Istanbul, please see the answer for it. My approach is: I have updated geth to its highest version I have kept the go-...
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How will the existing Smart Contract handle ETH Fork Upgrades (E.g., ETH's Istanbul Upgrade) or Outages

I have created my token and deployed on ethereum network before ETH Fork Upgrades (E.g., ETH's Istanbul Upgrade), What will be the huge impact of Fork update on my smart contracts and how can i manage ...
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Should I stop the geth node during hard-fork?

As the countdown on https://ethernodes.org/istanbul, should I need to stop my geth node before hard-fork? Or I could continue to syncing during hard-fork. Thanks alot.
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Is there a way to check if a hosted node is running on the new fork?

I am hosting Rinkeby node using geth v1.97. However, I was wondering if there is a command or way to check whether it is running on the new fork or not.
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What is the Muir Glacier hardfork?

What is the Muir Glacier hardfork on the Ethereum mainnet?
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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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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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1answer
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What is a hard fork? [duplicate]

I am new to web3 development. I have seen the word 'hard fork' in web3.js documentation, but I never understood it fully. I also noticed that hardfork is used a lot when talking about chains and ...
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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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How can I find reliable Ropsten nodes for adding to my nodes whitelist?

After the recent hard-fork on Ropsten we follow the tip on peter_szilagyi tweet to add a peer whitelist. In case we want to add more nodes to our whitelist as in Connect to static nodes. where can I ...
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If I'll remove the peer whitelist that I've added after Ropsten hard-fork split while longest chain exists, how the node react?

After Istanbul Ropsten hard fork split, I followed whitelist tip - https://twitter.com/peter_szilagyi/status/1178634327518781441. How a node will react in case I'll remove the whitelist while the ...
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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 a full node knows which chain to follow?

After Istanbul fork, my full node followed the longest chain which has: Longest Chain Highest TotalDifficulty It seems that the shorter chain of the core-dev closing the gap - total difficulty ...
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During fork, how tx that was sent from full node is been mined on the two blockchains?

My full node connected to 0,...,n peers and follows the longest chain after Istanbul fork - the miner's chain. General transaction flow: full-node get the tx, validates and broadcast to its peers. ...
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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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did peoples ethers get doubled after the hard fork? [duplicate]

I have a question and it's may be a little bit silly but I have to ask it. best why probably is to explain it with an example. lets say I had 2 ether on ethereum network before the DAO hard fork. now ...
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2answers
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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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Is Ethereum suitable as a store of value?

Say you bought some ether when ethereum was at 1.0. Most of the time Ethereum requires you to update (via a hard fork) to the latest software. This means you'd need to update your wallet every time ...
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Is it possible to hard fork a private network to Constantinople?

I have a Proof-of-Authority private Ethereum network that has Byzantium EVM version and created by clique engine. I have a single miner that has Geth version: v1.8.27. { "config": { "chainId": ...
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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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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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How Ethereum HardFork Complete?

When a major change happen in ethereum like Softfork or Hardfork, all nodes may not agree with this. So is this change possible ? Vitalik is creator of Ethereum. But ethereum is totally decentralized, ...
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What’s the full changelog for things which actually had been implemented by Constantinople?

It’s being said that the Constantinople hard fork is a minor one. But as far I know, this is isn’t just a miner reduction fees. They are additional things which were implemented (like a special ꜱꜱᴛᴏʀᴇ ...
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Blockchain Hark Fork System Impact - risk assessment and mitigation plan

I am exploring on System Impact risk assessment and mitigation plan during a block chain (ex –Ethereum) hard fork. 1) What happens to the deployed smart contracts when a hard fork occurs? 2) Does ...
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Will the Gnosis multisig wallets be compatible with the Eth hard fork

Does anyone know whether Gnosis multisig wallets are going to be compatible with the Eth hard fork happening soon? I am worried that the funds I have in mine might not be safe.
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Changing chain specification

We have a private network with 10 nodes actually. It's been working for a couple months now. When we did it, we set up some parameters in the chain specification that are now too small for the growth ...
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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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How to fork Ethereum(go implementation) to make a new chain? [duplicate]

I want to fork Ethereum(go implementation) to make another new public chain which should start again from the block zero but keeping all other parameters same as in main chain. Please guide me with ...
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1answer
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Why was the Constantinople hard fork postponed?

The Constantinople hard fork — really a network upgrade — was scheduled to happen today (January 16) at block 7,800,000. Instead the upgrade was postponed. What are the technical reasons for the ...
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Will the Constantinopole hard fork create new coins?

Is the ethereum constantinopole hard fork going to result in extra forked coins for ethereum holders?
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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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What is the point of switching to ProgPOW for ethereum, when POS is coming in the coming year(s)?

With the recent discussion of the new ProgPOW mining switch. What is the point of it when POS is coming in the coming year(s)? I understand it disables the ASIC miners, while benefiting the GPU miners....
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Constantinople hard fork and Ethereum based tokens

I have a question: Do we have to deposit all of our Ethereum tokens into some exchange before the Constantinople hard fork, otherwise our tokens will become worthless? Or we can leave our tokens in ...
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1answer
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What are the changes to be included with Constantinople fork? [duplicate]

Recently it was announced that the next hard fork of the Ethereum network mainnet will be at block 7,080,000. From more recent estimates it will occur around 2019-01-15 18:11:20 UTC. So what are the ...
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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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1answer
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Constantinople fork replay protection

I was wondering... Will Constantinople hard fork surely replace the current fork? Is there any chance that the Constantinople fork and the current one will co-exist? If so, any replay attack ...
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Geth Clique: can change config params in genesis and still retain the existing blocks?

I have altered my custom Geth private chain Clique PoA, but it seems after I do that I encounter: BAD BLOCK Error: invalid receipt root hash Is it possible to: change the Geth code add a new hard ...
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1answer
332 views

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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1answer
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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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1answer
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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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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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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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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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1answer
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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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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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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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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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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 ...