Questions tagged [testnets]

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

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What Android App has block explorer functionality for Ethereum testnet?

I need to interact with my web app that has blockchain functionality and it creates wallets on paper (pls dont ask why). It's using ropsten testnet. Is there an Android app that I can easily scan the ...
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2answers
31 views

Rinkeby not producing blocks

transactions are not getting mined on rinkeby testnet and last block time is almost 2 hours ago. How did such things happen in a decentralised network?
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2answers
62 views

Is there any testnet faucet for ETC Ethereum Classic Coin?

Not able to get testing ETC from available faucet https://etcfaucet.info/, is there any other faucet or way to get ETC for tesing?
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1answer
25 views

How to connect to Rinkeby without using Geth / Parity?

First let me explain my development environment. I am using Jupyter Notebook to play around with the Web3.py front-end code and Remix for the Solidity smart contract code. I am using the Metamask ...
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1answer
18 views

Set up hardforks parameters in parity JSON chain spec file for private network

I want to set up a private network for tests using parity, which will function in the same way as the current mainnet, but with very low block mining complexity. Is Is it true that for this I need to ...
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70 views

Does Rinkeby have a faucet where I can fill a wallet with DAI?

I'm looking to use a testnet to test an application. I know I can get ether, but is there an easy way I could convert it to Dai? Thanks
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1answer
56 views

Mobile wallets for test eth?

Can anyone suggest mobile wallets (both IOS and Andriod) that supports testnet Eth? Jaxx used to (or at least the IOS version used to), but doesn't look as though it does now.
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Building Prysm on Windows

I'm currently following the steps to build Prysm from the instructions on Github: https://github.com/prysmaticlabs/prysm At the step for building the beacon chain I ran this command: bazel build //...
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1answer
158 views

Which network does truffle use for testing?

I have a network 'foo' that is configured inside truffle.js. Running my tests works just fine truffle test --network foo ./test/*.js then I realized I forgot to start 'foo'. To confirm this running ...
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1answer
15 views

Gas estimation failed when calling the play function

I am trying to deploy this contract on the test network and am able to do so successfully but when i try to call the play function i get gas estimation error and can do nothing further. I am using ...
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1answer
71 views

What is the purpose of Görli Testnet?

Görli testnet is started with the goal of being widely usable across all client implementations supporting Clique PoA engine (EIP-225) (see Comparison of the different TestNets) Since it exists ...
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23 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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92 views

Signed transaction vanishing from testnet (Kovan & Rinkeby)

I've been attempting to broadcast transactions to both Kovan & Rinkeby, I'm building and signing them offline and using the Etherscan API to broadcast the signed transactions. I see them in the ...
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2answers
29 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. ...
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24 views

IPFS - file stored by all users

Suppose one or many users used my fully decentralized app to store different files on IPFS. How can I keep track of all file hashes by using smart contracts?
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3answers
41 views

Ether for learning ethereum

Crypto concurrency is not legal in India. If a developer who is citizen of India can learn and develop ethereum applications without buying Ether? If yes how ? I just learn that there is something ...
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1answer
36 views

How can you deploy a contract using the non-interactive mode?

I have a contract written in remix, but I am trying to deploy it using Geth's non-interactive mode using geth attach ipc:<path> -exec "<contract deploy info>". When I am in interactive ...
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1answer
56 views

is the gas price on test net equal to main net?

I have 1 contract deploying on test net, let say it use 300,000 gas for executing 1 function. On main net, this contract will cost 300,000 gas per function also? Thanks
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1answer
48 views

Most stable / reliable testnet

I hope this question isn't too vague, but it would really help me to get some advice on from the community on this subject. Which testnet is the most suitable for testing of a dapp? Do testnet ...
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63 views

Is it possible to set miner reward on Geth clique?

I have a private network set up with ethereum & PoA clique consensus. Using in geth client miner.setEtherbase(eth.coinbase) on miner nodes, doesn't seems to work. Inspecting in block explorer ...
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1answer
84 views

How to set sealers in genesis block extradata for a Clique PoA network?

What is the format of the Clique PoA genesis extradata field to set up the sealers? This is an example: "extraData": "...
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73 views

Error in syncing of Ropsten testnet on geth node

I am using a geth node to sync with the ropsten testnet . For the last few days I have been encountering the following error frequently Error: invalid gas used (remote: 7987157 local: 7897475) All ...
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1answer
52 views

Problems with Geth 1.8.19-stable

I am trying to add static peers by static-nodes.json file but with this version it does not work. What is the way to do it ? If I add peers with admin.addPeer() it works, but if I am using --syncmode ...
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1answer
28 views

Is there multiple chains of block in ethereum network?

Since blockchain is a chain of blocks, In ethereum, 1. is there only one chain of blocks 2. are there multiple chains of blocks.
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18 views

Get tx/s in a local testnet

I am using geth to create my local testnet. How can I get the tx/s in my testnet?
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1answer
25 views

Problem peers in a cluster [SOLVED]

I have a cluster with 2 nodes and I would like to create a testnet by connecting them with geth. I am using the following command: Node1: geth --datadir node1 --port 30302 --rpc --rpcport 3003 --...
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1answer
47 views

What is the beginning nonce on the Rinkeby Testnet?

I know that the nonce is representative of how many transfers an account has made and is 0 at the start on the mainnet. However, on testnets, such as the now decommissioned Morden where it was 2^20 I ...
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77 views

geth : Unable to fully sync to Rinkeby

I am trying to synchronise geth with Rinkeby node but when around 100 or so block left, it keep on dropping the peer and doesnot sync fully with the test net below are the screenshot for the same.
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104 views

Connection of web3 with Ropsten

How do I connect my web3 to ropsten network. I know how to pass the url of ropsten netwrok in web3 instance in my script tag but when i try to to console.log(web3.eth.defaultaccount) it gives me ...
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1answer
82 views

No data is deployed on the contract address!

I add a new Smart Contract and create it, but I get the following bug. Why is the contract not created? I take the etherium wallet and the ropsten testnetwork The first picture include the constructor....
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1answer
120 views

How to setup Testnet in Windows?

What are the commands for windows power shell to make a testnet. I require steps to set up testnet in private network in Windows OS.
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1answer
45 views

How to test time-dependent contracts on the mainnet?

In Ganache, I use evm_mine to simulate the passage of time. Assuming block times are accurate enough, what are the best practices to test some contracts on the mainnet or a testnet which depend on ...
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1answer
66 views

How to limit latest block in Geth

I need some test Ethereum blockchains for development purposes. I need only part of blocks synced for example, blochain synced from 0 to 10'000`th block, because for example Rinkeby synced in archive/...
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1answer
346 views

How long does it take to sync Rinkeby network with geth?

I am syncing the Rinkeby network with geth geth --rinkeby --rpc --rpcapi="personal,eth,network,web3,net" --ipcpath="~/.ethereum/geth.ipc" When I run eth syncing in geth console, it is showing { ...
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1answer
12 views

unable to connect to TestChain by Code

I am new at Ethereum and intended to connect to a test chain by c#. my code runs greatly on my old laptop win7, but on newer one Win10 it just waits forever. this is my code. has anyone any idea? ...
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1answer
170 views

how to call function on Ropsten

I deployed a smart contract to Ropsten testnet I want to call its only public function to test it on the network. How can I do such a thing and where I will see the result? The TxHash is: ...
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2answers
428 views

Syncing with Mainnet/Ropsten blockchain

If use gethcommand,then the node starts to sync with Ethereum Mainnet by default.If usegeth --testnet --networkid 3 --datadir <testnetdatapath>,then the node will connect to Ropsten. How does ...
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1answer
244 views

Golang binding - call contract method and get its return value or tuple?

Suppose i have contract like: pragma solidity ^0.4.11; contract MyToken { uint256 a; function SimpleGetter() returns(string) { return "something"; } function DoTheGreat(address _to) ...
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3answers
269 views

How to create a faucet for my Ethereum Private network as a clone of https://faucet.ropsten.be/

I have set up a Ethereum Network with 5 nodes on azure. Now I want to make a faucet like https://faucet.ropsten.be/ .Where anyone can go and put there wallet address and can get my network testether. ...
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1answer
223 views

No etherbase set and no accounts found as default

I am getting: "No etherbase set and no accounts found as default" when trying to sync my node using: geth --testnet --rpc --rpcapi db,eth,net,web3,personal --cache=1024 --rpcport 8545 --rpcaddr 127....
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1answer
187 views

Getting large amount of ropsten ether

I want to get about 150000 ropsten ether for testing. Is there any way to get it? I've seen some faucet websites but they have limitations.
2
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1answer
573 views

Using Python to invoke smart contract [duplicate]

I'm currently writing a thesis on a simulation of a peer to peer electricity market. The payments between the agents of the simulation would be settled through an Eth smart contract. I would like to ...
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2answers
480 views

Is it possible to use “Oraclize” on a testnets such as “Ropsten” or “Kovan” or “Rinkeby” or even local blockchain such as “TestRPC”?

Is it possible to use Oraclize on a testnet such as "Ropsten" or "Kovan" or "Rinkeby" or even local blockchain such as "TestRPC" ?
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1answer
135 views

Why is the different “highest block” of --network id 3 and --testnet?

I think both of --network id 3 and --testnet mean to the Ropsten network. But, The result of "eth.syncing" differ from each. --testnet result "highestBlock: 3852529" $ geth --testnet console 2>&...
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1answer
32 views

Launch more than one node connected to Rinkeby from the same machine (change the port doesnt work)

I would like to know if it is possible to launch more than one node connected to Rinkeby from the same machine through Geth and Mist. In a local testnet, it is possible to do it changing the --port ...
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1answer
554 views

How to add ICONS to our tokens on test network? [closed]

I have seen several questions about adding icons to the existing Tokens in main net. But is it possible to add icons and other information to tokens on test network ?? ((just for testing purpose)...
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1answer
72 views

How can I use performance data on Rinkeby to project performance data on the Ethereum Mainnet?

I'm testing a DApp on the Rinkeby testnet, and want to know how well it would perform on the mainnet if I deployed it there, specifically how much gas was consumed by the DApp. Is there any way for ...
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1answer
98 views

What is the reason for not just issuing a token on the testnet (e.g. Rinkeby) for your token so that Gas costs are free (Rinkeby ETH from faucet)?

If someone wants a token to be usable and easily transferable between users, without the prohibitive costs of paying for gas every time with real ETH (and thus, money), why not just deploy it on ...
3
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1answer
113 views

Is there any lifespan of data on Rinkeby testnet?

I read that there are pre-autorized nodes which creates blocks on rinkeby testnet. If developers keep publishing smart contract and do transactions for testing purpose isn't the size of testnet will ...
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0answers
241 views

how to send transaction with geth running in light mode on testnet

I am having troubles to sendTransaction with geth running in light mode. Startup: geth --testnet --syncmode "light" --rpc --rpcport 10001 --rpccorsdomain "*" --rpcaddr 127.0.0.1 --datadir /opt/...