Questions tagged [testnets]

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

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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 ...
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2answers
32 views

Buy ethereum tokens on testnet?

Where can I buy ethereum tokens on a testnet like Kovan? I have tried going into regular exchanges (e.g. Binance) but it seems like they only provide functionality for mainnet.
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1answer
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(Geth) run error: flag provided but not defined: -gasprice

I am following this tutorial and am able to successfully generate the genesis file and the initialize the bootnode as well but I am unable to start the mining process. Every time I run : geth --...
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Where is the best place to acquire large amounts of testnet eth?

While there are fairly easy ways to get small amounts of testnet ETH (e.g., 1 ETH) through faucets. What would be the best way to get a larger amount of testnet ETH (10-1000) in a time-sensitive way?
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Get Rinkeby Ether For metamask wallet [duplicate]

I am trying to get some Rinkeby ETH through for my Metamask wallet, I published my address into Facebook copied the link inserted it to https://faucet.rinkeby.io/ asked for Ether but it keeps on ...
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1answer
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How do obtain wrapped btc and wrapped ada in a local test network or a live test network like ropsten?

In the local test network and ropsten test network, it's easy to obtain ethereum but I need other tokens in order to do testing. I'm not sure how to obtain those tokens for testing.
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1answer
90 views

How can I acquire some ERC20 tokens to test AAVE on mumbai testnet?

I need to acquire some DAI or other assets which are supported by AAVE on Mumbai testnet to test my smart contract, but it seems that the AAVE faucet on their site is broken and does not work! (I ...
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0answers
29 views

Hyperledger caliper with local ethereum network

i am trying to use caliper with ethereum. i have deployed my contract using truffle. i am trying to run caliper locally. i am getting this error pls help. caliper launch manager --caliper-workspace . -...
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126 views

Transaction Underpriced at gas price less than 10Gwei on Binance Testnet

I am working on BEP20 token which I eventually want to deploy on the Mainnet. I have currently deployed the token on the Testnet. I am using metamask as my wallet. When I interact with the contract ...
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0answers
39 views

Calling functions/“Read contract” on mumbai testnet

When looking at a contract on the testnet (https://explorer-mumbai.maticvigil.com) I don't see a way to read the contract/call functions like you can on bscscan or etherscan. They also say the testnet ...
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23 views

Get accurate gas fees with Remix IDE on testnet?

How can I get accurate gas fees when testing with the Rinkeby testnet? When I test, the default gas is 1 gwei which always works, which obviously isn't accurate.
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1answer
25 views

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

If I have Contract A deployed to the Rinkeby Test Netwok If I have Contract B deployed to the Kovan Test Netwok Then, can we program the contracts to interact with each other like Contract A invoking ...
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1answer
54 views

Not receiving LINK from Chainlink kovan faucet

I attempted to get funds from kovan.chain.link to my metamask address and the money did not come through. I got some errors as seen here: https://kovan.etherscan.io/tx/...
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25 views

Why the contract verification using truffle is failing?

I have deployed a smart contract on BSC test net and it is successfully being verified using the following code truffle run verify PancakeFactory --network testnet but it fails if I do it like this ...
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1answer
30 views

Balance of contract

I am testing a smart contract but I have troubles accessing the balance of the contract in my javascript test file. For simplicity assume this is my smart contract: contract Donation{ function ...
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1answer
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The cost of eth in the testnet is equal to the eth cost in mainnet?

i´m new in Ethereum development, i´m developing a Dapp in the Ropsten testnetwork but i need to pass it to the mainnet, have the sames cost? are equivalent in the moment we pass the Dapp to the ...
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94 views

Gas estimation error MCL flashloan (On bsc testnet)

I get this pop-up shows Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending? every time I call flashloan. I directly ...
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0answers
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Is necesary pass a Dapp to mainnet or in testnet is ok for a production smart contract process? [duplicate]

Because the client Dapp propietary don´t have real Ether, only Ropsten test Ether via faucet.ropsten.be/ is necesary buy Real Ether to preserve smart contracts in ethereum or in Ropsten testnetwok is ...
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0answers
173 views

Remix: Gas estimation errored with the following message (see below). (…) execution reverted

I am trying to deploy a smart contract on remix written in VYPER. The code for the simple open auction comes from the vyper documentation website. Remix compiles the code perfectly fine. However, when ...
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1answer
46 views

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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0answers
13 views

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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42 views

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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201 views

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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0answers
75 views

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
217 views

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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2answers
62 views

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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1answer
18 views

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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0answers
14 views

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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41 views

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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1answer
83 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 ...
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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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0answers
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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 ...
2
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1answer
274 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
470 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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0answers
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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.
2
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1answer
180 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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1answer
133 views

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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0answers
68 views

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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0answers
46 views

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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2answers
191 views

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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0answers
27 views

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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2answers
100 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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1answer
71 views

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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1answer
126 views

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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1answer
148 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....
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1answer
49 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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0answers
17 views

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
106 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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1answer
51 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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1answer
89 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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