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.

37 questions with no upvoted or accepted answers
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7
votes
1answer
750 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 ...
4
votes
1answer
557 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 ...
3
votes
3answers
382 views

I keep getting nonce is too low when using truffle to call functions on contracts even though this works fine on remix.How can I fix this

I keep getting the nonce is too low when running functions with sub transactions on the kovan test net is there a way I can stop this from happening?these sub transactions are making transactions with ...
2
votes
4answers
2k 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 ...
2
votes
0answers
109 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 ...
2
votes
2answers
453 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 ...
2
votes
0answers
341 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 ...
2
votes
0answers
321 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 ...
1
vote
1answer
147 views

Troubles interacting with Chainlink node on Kovan

I've been following instructions on running a local Chainlink node on Kovan. My environment is configured to Kovan through websockets via Infura and the node is both running and successfully accepts ...
1
vote
0answers
138 views

Gas Estimation Error - Swap Contract

I'm working on developing a contract that automatically performs a swap and have been having an issue with the swap function. I finally got the contract deployed on Kovan, but have been getting the ...
1
vote
0answers
32 views

Contract method works on local but not on testnet

The following method, which works perfectly fine on my local ganache. function someMethod() external view returns ( bool someValue, uint256 lastIndex, uint256 totalTokens ...
1
vote
0answers
29 views

AAVE Protocol v1 issue on reserve addresses with compound ctoken addresses

https://kovan.etherscan.io/tx/0xa7f5e857d1a9ecb4aca0714b24a70ca0942cc1a656c8e09b6d01bab9af4ec9e5 I am trying to make a transaction from DSProxy (Smart Wallet) on a contract https://kovan.etherscan.io/...
1
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0answers
474 views

Mocha timeout when running truffle test. Works fine on ganache, not on public networks

This is the error I get when running truffle test --network kovan: 1) "before all" hook: prepare suite Error: Timeout of 120000ms exceeded. For async tests and hooks, ensure "done()" is called; if ...
1
vote
2answers
193 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 ...
1
vote
1answer
195 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.
1
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0answers
100 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??
1
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0answers
52 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 ...
1
vote
0answers
81 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?
1
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0answers
59 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
vote
1answer
418 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 --...
1
vote
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 ...
0
votes
0answers
55 views

ProviderError: Transaction with the same hash was already imported

I'm deploying upgradeable contracts on Kovan, but every time I run my deploy script I get the error. I'm using Hardhat. My deployment script const fs = require('fs') async function main() { let ...
0
votes
2answers
106 views

Error: Private key does not satisfy the curve requirements (ie. it is invalid)

I have a project working fine on truffle but when migrating to Kovan network, Getting the issue "Error: Private key does not satisfy the curve requirements (ie. it is invalid)" project is an ...
0
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0answers
29 views

Kovan Network - Transaction has been reverted by the EVM

i'm relatively new to web3 and Ethereum. I'm trying to approve a contract on the Kovan network, which requires 1 DAI to make this transaction. const segmentPayment = await gameContract.methods....
0
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0answers
218 views

How to get the contract address based on the transaction hash?

I have the following code which returns the tx hash but when I call upon the receipt it returns null and thus cannot extract the address: const privateKey1Buffer = Buffer.from(privateKey1, 'hex') ...
0
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0answers
53 views

Can't get revert reason (TransactionRevertedWithoutReason)

I'm making some tests on kovan network to execute a flash swap on uniswap. But for now I have reduce my probleme to this : // SPDX-License-Identifier: MIT pragma solidity 0.6.12; pragma experimental ...
0
votes
1answer
379 views

Connect local React frontend to contract on testnet (e.g Kovan)

I am new to this community and I had a question, in my opinion I think basic, but I have not found much information, see if you can help me. I have been developing smart contracts, both in Remix and ...
0
votes
2answers
822 views

Cannot obtain Kovan testnet Ether

Does anyone else have issues obtaining kovan ether? I have tried the following links only to recieve 0.01 Keth increments from app.mycrypto.com (when the site is up). The github sites do not respond ...
0
votes
0answers
35 views

how to access a DApp deployed on testnet (Kovan)

I'm using Infura, HDWallet and Metamask. I have a truffle project and my truffle-config.js is ready. Currently, I'm able to interact with my Smart Contract via PowerShell and via browser, so all ...
0
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0answers
130 views

How do I get multiple signers for the Kovan testnet?

I am using hardhat + ethers + infura for my contract development and testing, and all has been fine so far. On my local computer, when I run const [deployer, d2] = await ethers.getSigners(); in my ...
0
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0answers
195 views

Issue with `TRANSFER_FROM_FAILED` when calling Uniswap contract - but I am approving the token!

My code is pretty simple function swapForEth(address tokenAddress, uint amountIn, uint amountOutMin, address to, uint deadline) external onlyOwner payable { require(IERC20(...
0
votes
1answer
243 views

Transaction not showing on Kovan etherscan even after its status showed transaction mined and executed successfully

I have my contract deployed on Kovan Testnet and from remix IDE I called one of the functions of my smart contract through remix itself. Now, the status of transaction shows "transaction mined ...
0
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0answers
24 views

BlankToken Transaction

So i deployed my smart contract on Kovan Network using Remix IDE, i after successful compilation I added the arguments of the constructor to create the token, it deployed successfully but the issue ...
0
votes
1answer
212 views

Howto check sync with kovan testnet is complete or not?

I am trying to sync with Kovan testnet, docker run --name eth -p 8546:8546 -v ~/ws-002-chainlink/ws00-docker-geth-ropsten:/geth -it ethereum/client-go:stable --testnet --syncmode light --ws --wsaddr 0....
0
votes
0answers
71 views

web3.js function contract.once() not working on Kovan, but working on ganache

I am subscribing to an event (just once, queued after an update) of a contract to reload the data like this on my react frontend: const instance = new web3.eth.Contract(abi, address) instance.once( ...
0
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0answers
147 views

Is it possible to use ganache blockchain when I deploy my web app in heroku? or should I deploy the contract first to a test network?

const web3 = new Web3( new Web3.providers.HttpProvider( "https://kovan.infura.io/v3/INFURA_KEY" ) ); const abi = JSON.parse( '[ { "constant": false, "inputs": [ { "internalType": "string", "...
0
votes
0answers
109 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 ...