Questions tagged [testnets]

testnets are an alternative blockchains to be used for testing and development with no value attached

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View transaction hash on receiving node

I have just started to work with geth, and I am currently making a private network where I want to send messages (data) between nodes. My initial thought was to use "Whisper," but since this ...
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Better testnet environment

I'm looking for a better testnet environment for solidity development. My current flow at the moment is kinda slow: Asking for ETH on testnet faucet. Just deploy my smart contract to work and test. ...
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How to test contract interactions without pay fee

I have my contract which interacts with two different exchanges, can i test this interaction without pay fee? Before Deploy to the main net? I know it has Ropsten but it wouldn't work i think, i need ...
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Truffle Migration error to BSC testnet

Hey guys I am new to blockchain development and I have made my first project just messing around and I am currently trying to migrate the contracts to the BSC testnet. But I am getting the following ...
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Trying to Deploy copy of safenebula token smart contract on bsc testnet, keep getting an error. using remix on chrome. Is it problem with my remix?

The error I'm Getting - Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending? Internal JSON-RPC error. { "code&...
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Calling function from web3 fails, calling it from truffle console works

I have the following JS code to call a contract: const txHash = await timelockContract.methods.executeTransaction( "0x71c1179e3C351De2641845cDAe537aCFC1808Fd2", 0, "&...
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1answer
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Is there any version of AAVE protocol deployed on polygon/matic testnet?

As AAVE documentation suggests, there is a deployed version of the protocol on matic/polygon mainnet. However, it does not make any mention of those smart contracts on Mumbai testnet which I need to ...
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Can I detect if my solidity contract runs on testnet/ganache or mainnet?

Is it possible to detect from the smart contract in solidity if it runs on mainnet or testnet? Or if it runs on ganache? Maybe by getting the network ID? But I'm not sure it's possible from the smart ...
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Unable to synchronize with Ropsten testnet with Geth 1.9.25

For the past two days I've been trying to synchronize with Ropsten testnet using the following command in Geth 1.9.25: ./geth --ropsten --rpc --rpcaddr="0.0.0.0" --rpcapi="eth, web3, ...
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Contract Created successfully but I don't receive tokens ? Bscscan testnet

I'm really sorry for the basic question. I've made some basic contracts from youtube videos, now I've tried to take contracts from BSCscan and put them through Remix on Testnet to try them, but I ...
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Trying to sync the ropsten testnet to local server using geth

I tried syncing the ropsten ethereum testnet to my local server using the following script: nohup geth --testnet --bootnodes "enode://...
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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 ...
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How many miners are working on Ropsten (or other testnets)?

I'm curious how many miners or nodes are there on an Ethereum testnet. Is there any website which records such statistic or any method to estimate?
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Can I call the testnet contract's view from the main-net contract? [duplicate]

The question may be silly, but it is something I want to play around and experiment with. I want to call the view function that exists on the test-net from the main-net contract. Can we do this, and ...
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1answer
161 views

Do all Ethereum networks return the revert reasons as a “message” field?

I noticed that reverted transactions on Kovan don't include the revert reason. I'm getting the generic "Reverted"/ "VM execution error." Is Koval special in this regard? I know ...
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2answers
184 views

Can i sell my testnet tokens

I have some testnet tokens Eth,btc,litecoin,I need to know how can I sell this can we swap this to mainnet any site to do this
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Cannot get faucet for rinkeby [duplicate]

whenever I try to get faucet for the rinkeby test network, I get a message : "no address was found to fund", I had tried many accounts uselessly.
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1answer
100 views

Deploy to testnet with brownie

I'm looking to deploy some code to the kovan testnet with Brownie. However I keep getting an error accessing accounts. Here is the command I'm running: brownie run scripts/deploy_price_consumer_v3.py -...
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execution reverted: DepositContract: reconstructed DepositData does not match supplied deposit_data_root

I am getting this error when deploying Goerli's Medalla Beacon Contract through Remix. execution reverted: DepositContract: reconstructed DepositData does not match supplied deposit_data_root input (...
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Ropsten Node finally synchronized after 3 days: why a blockchain testnet should be so difficult?

I have started a new Ropsten Node running on a Pi4 4GB. Here is the relevant information for those who might want to start a new Ropsten Node: more than 3 day syncing $ geth --ropsten --datadir /mnt/...
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Can we deploy old deployed NFT contract to Ethereum 2.0?

I have already deployed contract on Ethereum. Now I want to deploy it on Ethereum 2.0, is it possible? According to some resources Ethereum 2.0 does not support for smart contract deployment. Thank ...
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How do I configure a browser to resolve ENS names from a testnet?

I want to preview a major revision of my Dwebsite before I update the IPFS CID to which the mainnet ENS name resolves; this requires locally resolvable names so hyperlinks and resource references work ...
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How to change contract interactions to kovan?

I am using newest web3 v1.2.4 const Contract = require('web3-eth-contract'); Contract.setProvider(INFURA_KOVAN_HTTPS); const contract = new Contract(CONTRACT_ABI, CONTRACT_ADDR); I have that code and ...
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1answer
65 views

How to handle Ropsten's smart contracts with Truffle?

I work with Truffle, Metamask, and Windows Powershell. I deployed my smart contract to Ropsten with Truffle by the below command in Powershell: truffle migrate --network ropsten Now, I need to ...
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What is the purpose of the Zinken Ethereum 2.0 testnet?

The Spadina testnet launched less than 2 days ago. What is the purpose of the Zinken testnet? What is being covered that was not covered in Spadina? Related: What are the Ethereum 2.0 testnets?
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What are the Ethereum 2.0 testnets?

There are many different Ethereum 2.0 testnets, among them Medalla Spadina Zinken What are the differences and what is their purpose?
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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....
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1answer
41 views

Is there any advantage of using localhost as testnet in Metamask?

I am using Metamask with ganache to deploy my Dapp, i use localhost testnet depend on some tutorials i followed it but really i don't know if it has any advantages comparing with other testnets or no? ...
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What is the expected daily egress traffic from full Testnet node

I have a full testnet node running on GCP with Parity. After about a week of having it fully synced, the egress traffic from the server spiked substantially and started sending out 250GB per day to ...
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1answer
72 views

How can I obtain testnet REP for use on Kovan?

I would like to test the new version of Augur on the Kovan testnet. Where can I obtain testnet REP in order to do so? I found https://faucet.kovan.network/ for Kovan Ether (KETH) but cannot find ...
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48 views

net.peerCount is zero: Two miners are not connected

I'm trying to build a local private blockchain of Ethereum in my own PC using Geth v1.9.15-stable-0f77f34b. I have installed Geth in a virtual machine with Ubuntu 18.04 OS using VMware Workstation Pro....
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Lightweight Ethereum client for Android and IOS

Are there any available Lightweight version of Geth or Parity client on Android or IOS in order to avoid using Infura service when accessing blockchain form a mobile app?
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67 views

Automate faucet Ether request to access Ethereum Testnet from a mobile DApp

I want to develop a mobile DApp to interact with a smart contract deployed in a testnet (free of charges). The mobile DApp is designated for public users. The DApp needs first to setup a local wallet ...
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1answer
60 views

What caused the forks in the Schlesi testnet?

The Schlesi testnet was the first multiclient testnet for ETH2 clients. Lighthouse, Prysm, Teku were in consensus before it forked. What were the causes of the forks? Is there a technical post ...
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2answers
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Deploying App on Ropsten or any Test Network

I have a web3.js application which uses truffle and interacts with smart contracts deployed on Ganache. How do I deploy my smart contract on a Test Network and interact with it through my application?
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How to handle events for testnet and mainnet?

I know how to handle events using personalised blockchain using ganache, can anyone tell me how to handle events in Kovan,rinkeby testnets?
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1answer
815 views

Recommended 64-bit OS for ETH 2.0 node on Raspberry Pi 4B

I would like to participate in one of the current ETH 2.0 testnet with my Raspberry Pi 4B (ARM64 processor, 4GB RAM) and 500 GB USB 3.1 SSD. Performance-wise, this is possible and I run an ETH 1.0 ...
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265 views

How to enhance list of accounts for the Truffle tests to run against Ropsten testnet

I am working on the my contracts testing scripts. But I want to run tests not on the local TestRPC or Ganache but in the Ropsten testnet. How can I predefine a list of accounts (private keys and ...
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How would a chain specification for a beacon chain look like?

Do Ethereum 2.0 clients, such as Lighthouse, Nimbus, or Prysm implement any standard on defining different chain specifications or genesis blocks comparable to how legacy Ethereum clients do? Would ...
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347 views

What does the beacon chain deposit contract ceremony entail?

To bootstrap an Ethereum 2.0 beacon chain, the deposit contract has to be deployed on the proof-of-work legacy chain. For the beacon-chain mainnet, we are talking about a ceremony potentially ...
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1answer
56 views

Can I make an ethereum token that runs a certain function every 15 seconds?

I have a rinkeby token, and I wanted to add "merged mining" when someone mines a block, they get awarded 0.25 of that token. function issueBlockReward() { balanceOf[block.coinbase] += 0.25; The code ...
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357 views

eth.getBalance(eth.accounts[0]) Shows me 0 balance though my syncing is still Running [duplicate]

I am using geth on windows with 1.9.10 version. I used geth --rinkeby --rpc --rpcapi="personal,eth,network,web3,net" command for launch my geth. I am on the Rinkeby testnet, i already transfer 3 ...
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When to stop importing new chain segments from Rinkeby testnet?

I am using geth to sync up with the Rinkeby testnet using the command: geth --rinkeby --syncmode "fast". First it downloaded the blocks, then account states, and now new chain segments are being ...
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3answers
292 views

Do testnets ever merge with mainnets?

Does a testnet ever merge with the mainnet? In other words, if I have ETH on a testnet, will I ever have actual ETH or do testnets remain for testing forever? I Googled in multiple ways but could ...
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199 views

Difference between Kovan and Rinkeby? [duplicate]

I understand that both the Rinkeby and Kovan testnets employ the Proof of Authority (PoA) consensus algorithms. I also understand how PoA works. However, I still dont understand how Kovan and Rinkeby ...
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103 views

What is the best way to deploy and test smart contracts on multiple machines?

I have recently started developement on Ethereum and the concepts are pretty much new to me. I need to test event emitting/listening on multiple machines for my contract. For the same, I have tried ...
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80 views

Create fastest possible localhost Ethereum test net

Is there an Ethereum test blockchain (similar to Ganache) which prioritises calculating transactions and creating a local blockchain 'db' as quickly as possible? Requirements: - Calculate ...
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1answer
27 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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207 views

How to get DAI using Web3.js

I'm building a Web3 app and I'm trying it out on the Kovan testnet. I'm trying to get some DAI. As far as I understand it the way to get DAI is to: Exchange ETH for WETH. Use Sai Tub contract to open ...
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238 views

How can I debug a my Solidity smart contract with a GUI?

Is there any way to debug a Solidity smart contract with a GUI, like remix? How can I do it for both testnets and mainnet?

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