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185 votes
Accepted

Comparison of the different TestNets

Sepolia Proof of Work (Ethash) Best reproduces the current Ethereum production environment (PoW) Website: https://sepolia.dev/ Resources: https://github.com/goerli/sepolia Goerli Proof of Authority ...
medvedev1088's user avatar
44 votes
Accepted

What is Olympic, Frontier, Morden, Homestead and Ropsten Ethereum blockchain?

Each network version gets a name (id). Here is an overview. Olympic (0) is also regularly referred to as Ethereum 0.9; it launched early 2015 and was the first public Testnet. Deprecated in mid 2015 ...
q9f's user avatar
  • 32.9k
28 votes

Comparison of the different TestNets

There are other (test-)networks as well, as described in this SO answer, copied here with their network id numbers: 0: Olympic, Ethereum public pre-release testnet 2: Morden, the public Ethereum ...
Stan James's user avatar
23 votes
Accepted

Ropsten testnet is under kind of attack? What can we do?

Update - 25th March 2017 Ropsten has been revived! We are pleased to announce that the Ropsten testnet has been revived! Thanks to a generous donation of GPU hashpower, the Ropsten chain has ...
Richard Horrocks's user avatar
17 votes

how to connect "Kovan" or "Rinkeby" from geth

For rinkeby, just type geth --rinkeby from command prompt and you're in
adaKing's user avatar
  • 171
9 votes

how to connect "Kovan" or "Rinkeby" from geth

For Kovan: parity --chain kovan it won't be possible to connect to Rinkeby with parity, only with geth. Rinkeby with geth: geth --rinkeby
rstormsf's user avatar
  • 4,357
8 votes
Accepted

Where can I find test-ether for the Kovan Test Network?

Here's a link to information on faucets for the Kovan testnet. There are currently four ways listed on the above link to get Kovan testnet ETH: Icarus Faucet (SMS Verified, Automated) Request ...
natewelch_'s user avatar
  • 12.1k
5 votes
Accepted

How to sync Kovan (troubleshooting)sn

Red indicates it's a testnet, that's perfectly fine. You don't need the kovan specification json anymore. with latest versions, just run parity --chain kovan --no-warp. And the --no-warp flag will ...
q9f's user avatar
  • 32.9k
5 votes

Ropsten testnet is under kind of attack? What can we do?

Ropsten is to be considered dead, and parity launched a Proof of Authority testnet called Kovan. Read the proposal here: https://github.com/kovan-testnet/proposal To update your testnet from ropsten ...
q9f's user avatar
  • 32.9k
5 votes

truffle deployment - runs out of gas on simple contract

If anyone else is getting the error: Error encountered, bailing. Network state unknown. Review successful transactions manually. Error: VM Exception while processing transaction: out of gas Delete ...
Miguel Mota's user avatar
  • 5,163
4 votes

Ropsten testnet is under kind of attack? What can we do?

If you've sent any transaction in last 48 hours or so, then it's because of the 51% attack on ropsten, which is not resolved yet. Follow the link below: https://www.reddit.com/r/ethereum/comments/...
Vixon's user avatar
  • 557
4 votes

What is Olympic, Frontier, Morden, Homestead and Ropsten Ethereum blockchain?

That´s right. Homestead is the current main network whereas morden is commonly called the 'testnet'. They are both similar beside their content and value. Testnet 'coins' are worthless. While users ...
Chevdor's user avatar
  • 221
4 votes

how to connect "Kovan" or "Rinkeby" from geth

You have to use either the --chain or --networkid options, depending on your client. The Kovan network is only available when using the Parity client. From the Parity --help output: --chain CHAIN ...
Richard Horrocks's user avatar
4 votes
Accepted

How to test RPC port for accepting traffic

Any call to methods from https://github.com/paritytech/parity/wiki/JSONRPC-eth-module should work for rpc. For example requesting the current block number curl --data '{"method":"eth_blockNumber","...
Ismael's user avatar
  • 30.5k
4 votes

Where can I find test-ether for the Kovan Test Network?

Use the gitter app, this is the best way to get ether in Kovan Testnet, URL: https://gitter.im/kovan-testnet/faucet Upon going to the above url, post your kovan address to instantly get 5 ether to ...
VivekTamilarasan's user avatar
4 votes
Accepted

Where to find and how to get Kovan USDC testnet tokens

https://staging.aave.com/#/faucet. You just connect with your Metamask wallet on Kovan testnet and select USD Coin. You will be prompted to accept the metamask transaction and after you will receive ...
Icarus23's user avatar
  • 351
3 votes

How do i transfer from main eth network to kovan test network in metamask?

You can't transfer ETH from one network to another. You can get free ETH on most testnets though, here's a link to information on faucets for the Kovan testnet. There are currently four ways listed ...
natewelch_'s user avatar
  • 12.1k
3 votes

Geth or Mist do not sync any more

There's currently (still?) an attack on the Ropsten test network: Ropsten testnet is under kind of attack? What can we do? what do I have to save in order to not loose my test accounts ? (i ...
Richard Horrocks's user avatar
3 votes

Ropsten testnet is under kind of attack? What can we do?

Check this out ! Kovan to the rescue :) http://www.ibtimes.co.uk/parity-pushes-new-ethereum-testnet-kovan-after-spam-attacks-1609901
Aurel IANCU's user avatar
3 votes
Accepted

How many transactions per second can Kovan or Rinkeby Network handle?

Both Kovan and Rinkeby have a gas limit of ~7 million, which is about 330 regular ETH transfers per block (21,000 gas each). Kovan has a ~4 second blocktime and Rinkeby has a ~15 second blocktime, so ...
natewelch_'s user avatar
  • 12.1k
3 votes
Accepted

Is there a decentralized way to intercommunicate between two Ethereum networks?

To communicate between two different networks, you need a bridge of some sorts. The most straightforward bridge is an oracle service which relies data between the chains. To create a decentralized ...
Lauri Peltonen's user avatar
3 votes

What is this STF error when trying to use a function in a contract

execution reverted: STF means execution is reverted by require assertion in TransferHelper.safeTransferFrom function. Here is the code of Uniswap V3 Swap Router https://etherscan.io/address/...
TechGeorgii's user avatar
2 votes

How to sync Kovan (troubleshooting)sn

I am using the latest parity version. In this version we don't need to specify a Kovan config file. Below listed is the way i am starting parity. In this case I am getting KOVAN with red background. ...
Susmit's user avatar
  • 1,804
2 votes

How to connect from Remix to Kovan testnet?

run parity with parity --chain kovan. and then in your endpoint provide http://localhost:8545 or http://127.0.0.1:8545 8545 is the RPC port
Badr Bellaj's user avatar
  • 18.8k
2 votes

Truffle.js and Kovan/Ropsten

As far as I know Kovan is only accessible by running Parity. This repo contains all of the info and instructions on getting Kovan setup along with the config file: https://github.com/kovan-testnet/...
TyndieRock's user avatar
2 votes

Ethereum Testnet mobile app wallet

Here's a list of mobile wallets that let you change the network to a testnet (Goerli, Kovan, Rinkeby or Ropsten): MetaMask Mobile (although you cannot connect to localhost because they only allow ...
Paul Razvan Berg's user avatar
2 votes

Where can I get some Kovan Ethers?

Googling gave me This about Kovan Faucet There are currently a few different methods of receiving Kovan Ether: Icarus Faucet (SMS Verified, Automated) Request Via Gitter (Manually Verified) Use PoW ...
niksmac's user avatar
  • 9,673
2 votes

How Much Space is Kovan Network to Download (Oct 2018)

It is 18.7 GB, and it took about 6 hours to download with --no-warp
dave kajpust's user avatar
2 votes

Is it possible to use MetaMask for a private consortium on Ethereum?

Yes, it is possible: Configure Metamask to connect to a node that synchronizes with your private network Configure Metamask to use correct chain ID for your private network when constructing ...
Mikhail Vladimirov's user avatar
2 votes

Web3-core-helpers error: Uncaught (in promise) Error: Provided address "undefined" is invalid,

You declared you function as async but never used the async/await pattern. I added the await at the correct position for you. Try this: export const loadExchange = async (web3, networkId, dispatch) =...
cqx's user avatar
  • 3,462

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