Questions tagged [kovan]

Kovan is a new testnet for Ethereum using Parity's Proof of Authority consensus engine, which is immune to spam attacks as Ether supply is controlled by trusted parties and provides a consistent 4 second block time.

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1answer
58 views

Is it possible to successfully complete several sequential (order-dependent) token transfers within 1 transaction?

Is this an example of such? https://kovan.etherscan.io/tx/0x5d11fca70dd134628641bc1ce07b7185418748e5e9820b45b608d9526e629136 Might using inline assembly allow for this?
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0answers
50 views

Parity SMS Verification failed

I have tried to verify my account by SMS method so I can request Kovan ethers. I have followed this video https://youtu.be/99UucFzYCRc. Unfortunately someting have messed up (I have changed ...
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1answer
88 views

Parity Kovan shows TX id but 0 balance in Smart Contract

I make this tx: 0x6d5c2CC2e1454B493E4090fA3995226245c8b744 which shows raw tx: { "blockHash": "0xc101da80e396878a572dc3024c5423479e5e45a9c622af5621ad521fe86cd8af", "blockNumber": "6007464", "...
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3answers
2k views

truffle deployment - runs out of gas on simple contract

I am trying to deploy the SimpleToken code from the Open Zeppelin project and seem to always run out of gas when deploying it to either Kovan or Ganache. I even specified 4700000 gas in the truffle....
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2answers
985 views

Get events from Kovan Testnet

I am trying to connect to Kovan testnet from a Node.js server. I have tried to connect in order to retrieve past events. Steps tried so far:- The connection was done via Infura. Tried these steps ...
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0answers
79 views

Theoretically, how fast can a Proof-of-Authority chain process transactions?

How fast can Proof-of-Authority chains like Kovan process transactions? What's the upper bound?
4
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1answer
527 views

Contract transaction couldn't be found after 50 blocks in Kovan

When deploying contracts on the ledger I faced with issue Error encountered, bailing. Network state unknown. Review successful transactions manually. Error: Contract transaction couldn't be ...
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1answer
249 views

Pending state of deploying contract on Kovan network

I am deploying my contract into Kovan network and faced with issue. When execute truffle migrate command it is go on blockchain and waits for confirmation: 2018-01-11 18:36:55 TRACE own_tx Signer:...
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1answer
565 views

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

Now, Ethereum can handle only 8-12 transactions per second by using PoW Consensus. I know that Kovan and Rinkeby is using PoA Consensus. PoA is lightweight than PoW. So how many transactions per ...
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1answer
2k views

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

I transferred Ether to the main network in Metamask. This might seem like a stupid question, but how do I transfer that Ether to the Kovan Test Network? Cheers
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2answers
405 views

How to connect these **Remix - kovan - parity**?

I have been trying to connect deploy a smart contract from remix onto kovan chain via parity but kept on showing even after trying with all the rpc flags. if possible please throughly explain the ...
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0answers
56 views

Cant transfer testnet ether

Every time I try to transfer kovan testnet ether from one account to another it says [-32021] Account password is invalid or account does not exist while confirming the password for the account. ...
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1answer
321 views

Specify Token Price

I'm pretty much new on this. But I really want to learn. I just created a contract for mintable token on Kovan test-net. But, I'm getting confused when I try to buy the token, it's always shown x000....
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1answer
287 views

How to verify my account in order to use the Kovan testnet?

I am new to parity and kovan-testnet. I have to verify my account in order to receive keth. I am confused as to where to execute the following code: curl http://github-faucet.kovan.network/url --...
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1answer
2k views

How to test RPC port for accepting traffic

I have a fully synced node running in my personal computer with kovan testnet. I want to test if my RPC port is accepting traffic or not. I am using parity as a system service.
108
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2answers
34k views

Comparison of the different TestNets

The Metamask client allows access to four test networks: Ropsten Kovan Rinkeby Goerli I'm curious: What are the similarities / differences between them? Which use cases are best for each network ...
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1answer
437 views

Why is my MetaMask's account address same for both Kovan and Main network?

Aren't they created randomly and separately on each network?
3
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1answer
269 views

Code for contract interaction works on Kovan but not on Ropsten

we deployed (via remix) the code below where one contract can influence a state variable in the other. For some reason if I deploy the contracts on Ropsten it doesn't work and if I deploy them on ...
7
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1answer
717 views

Parity Error: Account not found for the current chain (Kovan)

I am having problem starting Parity with a account that I created using Metamask. This account 0x76Eb17471A5fb78EF6768254D1dAEc528ec6b5a8 has received multiple ETH from Kovan faucets. Running the ...
3
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1answer
6k views

Where can I get some Kovan Ethers? [duplicate]

I tried to get some Kovan ethers, but all the site/faucets I get revered to by MetaMask don't seem to work. Anyone any suggestions or maybe even some spart Kovan Ethers? My address is: ...
1
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1answer
352 views

Parity Development Chain

I am new to parity and wanted clarity on the clarity development chain Is it like testrpc ie. stored in local and not like the testnets (ropsten, kovan and rinkeby) which are simulation blockchains?
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2answers
13k views

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

I have tried getting some using my github account but my account got flagged immediately and the program wasn't recognizing my account (Since it wasn't public due to being flagged). Are there any ...
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3answers
4k views

Ethereum Testnet mobile app wallet

Is there any Mobile Wallet like Jaxx, but with testnet(like, kovan, ropsten)? Please do suggest me, I am workin on the cryto coin transfer application.
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4answers
11k views

how to connect “Kovan” or “Rinkeby” from geth

As far as I know, the default test network is "Ropsten" and you can connect to ropsten with following command.Since it is default, when you connect to testnet its "Ropsten". geth --testnet I would ...
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0answers
1k views

Migrating a smart contract to the kovan test network using the truffle framework just hangs

I am trying to deploy a smart contract to the Kovan test network with the truffle framework. When I run truffle migrate --network kovan it just hangs for ages at the following place: Running ...
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1answer
2k views

Unable to migrate contracts to Kovan using truffle.js (testrpc and dev chain works though)

I'm having problems deploying contracts to kovan. I'm able to deploy to testrpc, as well as the parity dev chain, but the exact same process fails on kovan. The contract hangs at: Running migration: ...
4
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1answer
444 views

Trying to deploy a contract on Kovan testnet with Parity and it's waiting forever for a confirmation

It says it's waiting for a contract deployment transaction receipt and it just sits there and waits. It never moves to the completed stage. It was working fine for me a week ago. What's going on?
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0answers
339 views

Parity getting started tutorial not working

I'm trying to do the getting started tutorial from Parity but it isn't working. When running the following command: parity --chain=kovan i get the following error message Cannot read manifest file ...
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1answer
873 views

How to connect from Remix to Kovan testnet?

In Remix, there is a Contracts tab, where I can choose the "Execution environment". When I choose "Web3 Provider", I am asked to provide the "Web3 provider endpoint". What should I write there in ...
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0answers
103 views

kovan contract creation does not work from geth

This script which I load into geth via loadScript creates a transaction but it remains pending forever https://kovan.etherscan.io/tx/0xb61f0411e937660c34c903e4e3360b0b2e5a3f38e1ed293afde3fef6c1ec11c7 ...
4
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1answer
2k views

Truffle.js and Kovan/Ropsten

I am trying to use truffle.js and the testnet. I want to test using Kovan an Ropsten. Here is the doc from truffle - networks: { "live": { network_id: 1, // Ethereum public network // optional ...
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2answers
2k views

How to sync Kovan (troubleshooting)sn

Parity seems to work and comes up with the green 'homestead' button in the bottom right hand corner. When trying to sync with Kovan after using this video/tutorial for setup: https://www.youtube.com/...
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0answers
308 views

How can I connect to Kovan using Ethereumj

I'm trying to connect to Kovan using Ethereumj based on the way that I used to connect to Ropsten. The sample example works, however when I try to do peer.discovery.enabled=true I'm not sure which IPs ...
3
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1answer
849 views

Latest Parity asking to create account everytime

I have downloaded the latest version of Parity. Installed it. It started by default and asked to create an account. I created the same and got some ethers from the parity faucet site by requesting ...
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0answers
95 views

Is Ropsten testnet dead? [duplicate]

I am using the Ropsten testnet but it is stuck syncing only one block at a time around block 589000. How should i approach this? Just let it keep syncing? delete the whole blockchain and redownload it?...
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0answers
149 views

Parity account balance not updated [duplicate]

I'm using parity in ropsten testnet. My account address is 0x00562e88274Ac44752913955EEEd4CAa939C6abB. On etherscan it says that account balance is 4 ether but on parity it says that "There are no ...
4
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1answer
1k views

Geth or Mist do not sync any more [duplicate]

I am new to ethereum but managed to successfully start Geth on 2 of my machines , and could also install MIST. Now, since several days, one of my machines does not sync with the testnet anymore. I ...
38
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5answers
8k views

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

For the last approximately 24 hours, Ropsten testnet is under an attack in my opinion. The gas limit is raised to 200m and the attacker was proposing blocks with more than 4,000 internal txs ...
33
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4answers
6k views

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

I am studying Ethereum and have not been able to figure out the difference between Homestead and Morden. In some docs, it is written that Homestead uses a new algorithm which takes less time. I don't ...

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