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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
15 views

Kovan contract creation gas limit behavior

I have a fairly large contract that I must create on Kovan network for testing. There is fairly weird behavior occurring when I am trying to create the said contract. Behavior being: whenever ...
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1answer
10 views

How to get exchange rates for testnets?

I would like to see what a PETH on Kovan is worth in DAI. How can you look for exchange rates on testnets?
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1answer
28 views

Error : migrate kovan

From : truffle migrate --network kovan >> ProviderError: VM Exception while processing transaction: revert >truffle migrate --reset --network kovan Warning: Both truffle-config.js and ...
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1answer
57 views

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

When I launch the app with with react.. this error occur when my exchange contract is loaded.. Here is the code i wrote to talk to the blockchain: export const loadBalances = async (dispatch, web3, ...
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1answer
40 views

truffle migrate --network kovan >> ProviderError: VM Exception while processing transaction: revert

I am a beginner. I can deploy to a private network but I can not deploy to a public network. I need a Deploy to the kovan test network. please help me. >truffle init >npm install truffle-...
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0answers
9 views

truffle exec scripts/seed-exchange.js --network kovan

I've been running into an error when I attempt to seed my exchange/contracts on the kovan test network. Any help would be appreciated. Using network 'kovan'. Token fetched ...
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0answers
36 views

Why am I getting an out of gas error on transactions that should instead revert due to a require statement?

I've thoroughly tested a contract using Ganache, and when calling a method with a value that would trigger one of its require statements, it reverted as expected and returned the error message I ...
1
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1answer
53 views

truffle migrate --network kovan issue

When I run truffle migrate --network kovan in the terminal the contract deployment doesn't run. Just: Compiling your contracts...==================== >Eveything is up to date, there is nothing to ...
0
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1answer
38 views

How to redirect to Etherscan website when transaction completes?

In my project, I am doing a transaction by using ethereum.send({ }) method from web3 in javascript using metamask. After the transaction completes I want to display the link to the user in label ...
0
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1answer
22 views

What are the list of nodes at the bottom of kovan.json?

The Genesis file for Kovan has a list of nodes at the bottom. What are these nodes for? Is this just a list of known Kovan nodes? "nodes": [ "enode://...
1
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2answers
69 views

OpenZeppelin contract not working on Kovan testnet

I created a simple smart contract using OpenZeppelin and deployed the contract to the Kovan testnet. However, when I send KEth to the contract using MetaMask, nothing happens (I believe the buyTokens ...
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0answers
24 views

what is the standard server configuration for hosting own kovan validator node?

What is the recommended hardware specifications ( CPU, RAM, Network ) to host my own validation node for kovan testnet and what is the average data transfer out from validation node?
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2answers
30 views

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

Assuming we create a private consortium chain over Ethereum and we want to use MetaMask for storing the keys and signing transactions to send the tokens belonging to this private consortium. ...
1
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1answer
33 views

Event firing before data is actually set [Testnet]

Today I've faced the behavior similiar to this post. Event firing before data is actually set I'm getting events using infura and then checking for the state. I expect to read updated blockchain ...
1
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1answer
71 views

List of Token Exchanges Available on Testing Network?

Found Kyber Network Token Exchange on Ropsten so far. Please share if you know more token exchanges available on any testing network for trading Tokens as a test.
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1answer
45 views

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

How much space is it? How long did it take to download?
3
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2answers
150 views

Transaction ordering in proof of authority

In decentralized computation the order of transactions is a big deal. For many smart contracts, the sooner a transaction is called, the bigger benefits for that transaction. In proof of work, ...
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1answer
213 views

Getting errors if sending transactions at short time intervals

I am on the kovan network and use web3 to execute transactions and query the blockchain. If I send many requests in short time intervals (1-15 seconds) one after the other, I get several errors >70% ...
0
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1answer
70 views

Validator stuck in Pending State

I am working with a kovan validator set for a POA network. When I try to add validator, I make the Initiate Change call and it goes through. Validator goes to pending state. When I make the Finalize ...
2
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0answers
75 views

Is there something like “metrics” and “monitor” modules for Kovan?

I would like to monitor some parameters for Kovan and Rinkeby clients. Geth provides a monitor module that works with Rinkeby specifying --metrics when launching the client, and attaching to the ...
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1answer
50 views

Contract deployment out of gas, but was created anyway?

I have deployed a contract with Parity on Kovan, which did not show up in the contracts menu after contract deployment was done. I had to watch it manually to be able to see it in the contracts menu. ...
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0answers
83 views

etherscan kovan testnet didn't work?

It seems that etherscan's kovan tesnet has some problems? the block of etherscan fell behind others!! Is there another kovan testnet browser??
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1answer
47 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?
1
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0answers
46 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
70 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
1k 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
650 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
71 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
500 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 ...
1
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1answer
239 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:...
1
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1answer
488 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 ...
3
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1answer
1k 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
2
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2answers
339 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
51 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. ...
1
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1answer
263 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....
0
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1answer
114 views

Where to execute the code

I am new to parity and kovan-testnet. I have to verify my account in order to recieve keth. I am confused as to where to execute the following code: curl http://github-faucet.kovan.network/url --data ...
4
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1answer
1k 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.
87
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2answers
20k views

Comparison of the different TestNets

The Metamask client allows access to three test networks: Ropsten Kovan Rinkeby I'm curious: What are the similarities / differences between them? Which use cases are best for each network Are ...
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1answer
241 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
225 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
582 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 ...
2
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1answer
4k 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
329 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?
6
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2answers
6k 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 ...
6
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1answer
1k 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.
17
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4answers
9k 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
902 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 ...
3
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1answer
1k 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
424 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?
2
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0answers
320 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 ...