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Questions tagged [testnets]

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

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new blocks not appended at the end of chain after restart

I run a private testnet with Geth v1.8.17. At the moment only one node is connected and is constantly mining. Most blocks are empty but some contain transactions. After I let the miner run for a few ...
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1answer
14 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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ETHER Not Received On My Account on Rinkeby Testnet [duplicate]

I started a local node connected to the Rinkeby testnet... geth --rinkeby --rpc --rpcapi='personal,eth,network,web3,net' ... and then attached the geth console: geth --datadir=%HOMEPATH%/.rinkeby ...
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7 views

Maximum block number reduced after restarting Geth

I run a local testnet with only one node. I use the geth client to constantly mine. From time to time there are transactions but most blocks are empty. So I noticed twice that after restarting the ...
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1answer
19 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
61 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.
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34 views

geth 1.8.15-stable eth.hashrate always zero on Intel Core i7-7500U laptop

I'm using the latest geth 1.8.15-stable under Ubuntu 18.04 on my not-so-crappy laptop (Intel Core i7-7500U, 16G RAM, 512G PCIe SSD) mining on testnet yet eth.hashrate always returns 0 $ geth --...
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1answer
42 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
208 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
57 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
20 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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16 views

Is there any way to simulate the Ethereum mainnet gas price for a Dapp? [duplicate]

I'm currently developing a Dapp, and I've tested it on the Rinkeby testnet. Is there any way for me to figure out the ideal gas price on the mainnet for my Dapp transactions to run within, say, 20-30 ...
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1answer
59 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
22 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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21 views

Who runs the Rinkeby and Ropsten networks? [duplicate]

What organisation, or entity is responsible for running the Rinkeby PoA test network? Similarly, who operates and maintains the Ropsten network?
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1answer
37 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 ...
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34 views

how to stop increase difficulty in private ethereum network [duplicate]

According to this discussion: How do I decrease the difficulty on a private testnet? I did the same changes on geth and built geth. The problem is when I modify geth and create my private network, ...
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1answer
42 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
84 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/...
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1answer
95 views

MetaMask cannot connect to “localhost 8545”

When I choose localhost 8545 in MetaMask, apparently it is not able to connect. Please see screen shot: I tried with several internet connection, however the same result. Whereas, I can easily ...
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1answer
27 views

What kind of security measures do Testnets have in place?

Cryptographic work is spent verifying transactions on Ethereum, without which, there would be little to nothing preventing colluding to start a 51% attack or creating false identities to start a Sybil ...
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1answer
86 views

Possibility of transferring “real funds” and “real ether” on “ testnet ”?

According to THIS ANSWER (by user "eth") : (1) Testnets are "play money" so that you can try out applications without spending real money. And According to THIS WEBSITE : (2) Tobalaba ...
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0answers
9 views

Eth on unlocking auto transfers

Facing a weird issue on geth console on my private network. So, I was trying to unlock an account so that my web3 can access it. As soon as I unlocked, all my ethers just vanished in seconds.. I could ...
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50 views

Is there any Ropsten (or any other testnet) node with whisper enabled?

I am trying the embark framework which has whisper integration. I wanted to deploy the dapp and test it live. If there is one could you let me know the endpoint and port. Thanks :)
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1answer
42 views

ENS with Smart Contract [duplicate]

Is it possible to assign a name with Ethereum Name Service to a Smart Contract's address on a testnet? I found a description only for personal wallet.
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1answer
187 views

How do I tell if initial geth sync is done in 'light' mode on testnet

I just installed geth on Windows 10. Then I did the initial sync in light mode on testnet, and my status is as shown on the screenshot below. I have two questions (related): How do I tell if the ...
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2answers
82 views

Execution difference of method call in MainNet vs TestNet

I was looking at the new smart contracts submitted list on Etherscan to pass the afternoon, and I came across this one: https://etherscan.io/address/0x70bf9df6967dc96156e76cc43b928a7ef02e159a The ...
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1answer
116 views

Manual TX over Testnet - Error: exceeds block gas limit

I was trying to follow: https://github.com/ThatOtherZach/Web3-by-Example/wiki/Send-Ether-Transaction to create and broadcast my first transaction on the ethereum testnet rinkeby. However, I am ...
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1answer
258 views

Geth will not start mining in private network!

Will somebody please help me out? I am stuck at this since hours; did the process +3 times, each time deleting the datadir content. Geth still will not start mining!! Specs: Geth 1.8.11, on macOS X ...
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2answers
52 views

Difference between rinkeby.etherscan and etherscan alone

Which is the difference between both? Both are useful to have the own ethereum tokens or someone is better than other. Can someone explain??
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1answer
223 views

Is it possible to run multiple Ganache nodes for private test network?

I wonder if i can create my own private cluster as it can be done with Geth for development & test purposes : https://github.com/ethereum/go-ethereum/wiki/Setting-up-private-network-or-local-...
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0answers
19 views

Is there a 'simnet mode' for Ethereum?

simnet is a feature of the Bitcoin client btcd, which allows a user to create a virtual test network where he can create blocks at ease. Is there a similar feature for Ethereum/geth? What's the ...
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67 views

Error: invalid chain id for signer on Ropsten

For past few daya , I am unable to sync the blockchain data on my machine with Ropsten network . I have upgraded geth to the latest version 1.8.10 stable . But this does not resolves the issue for me ....
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1answer
46 views

Transactions confirmation

I am using geth --dev --ipcpath ~/.ethereum/geth.ipc --minerthreads=5 console to run privatenet. So i use Etherium wallet to interact with it. The problem is that i need to do some transfer ...
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55 views

Getting Errors while syncing of blocks (Ropsten network)

Today the block sync with Ropsten network on my machine is giving me following error :- ERROR[06-05|06:59:12] ########## BAD BLOCK ######### Chain config: {ChainID: 3 Homestead: 0 DAO: <nil> ...
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22 views

Mist wallet not merging for light / mined ether - Testnet / Ropsten

Mist wallet not merging for light / mined ether - Ropsten / Testnet. In Mist I have 1 testnet (Ropsten) account - called Atest. I have 1 testnet wallet - called Atest1 I am mining with geth When I ...
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1answer
95 views

EIP20.Sol does not compile. On remix.ethereum.org, I am trying to deploy a test token

I followed the instructions and got an error: Parse Error Expected Token ; got 'LParen' emit Transfer(msg.sender, _to_value); How do I fix this? Code: function transfer(address _to, uint256 ...
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0answers
18 views

What use case do peers have on test net?

Hi I am new to Ethereum (and Blockchain) and am trying to set up testnet using Geth to learn about about the intricacies of Blockchain. So this might be a trivial question: A lot of tutorials out ...
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1answer
68 views

Is there a difference between the terms TestRPC and Testnet?

From what I understand, a testnet is just a local (or private) blockchain for developers to experiment on, and TestRPC is/was a specific implementation of a testnet for the Ethereum blockchain? (I ...
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0answers
47 views

goroutine while running geth on aws node

I'm trying to run a testnet node of a private network id on my aws instance. It starts syncing but then it crashes and shows goroutine err. The entire stack trace was too long so just pasting part of ...
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2answers
152 views

Want a large number of Test Ethers. How to get them?

I have made a proof of concept that works on Ropsten Test Network. Now for users to use it I need a large number of Test Ethers in my account. As far as I know, we can get only one ether with one IP ...
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0answers
13 views

How to start Mining testnet ethers on Amazon ec2 ubuntu

I have a Ubuntu Amazon ec2 instance how can I start Mining test ethers . I just want to implement mining. Any resources would be helpful.
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2answers
170 views

Interacting with erc-20 contracts on testnet

I'd like to try some ERC-20 token transactions on testnet (preferably ropsten). Is it common that token issuers deploy their contracts on testnet? Are there any faucets? How does one proceed if want ...
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1answer
35 views

How to use/start testnet with Ethereum

I'm new to Ethereum and try to configure the initial test network. I have installed geth and I believe that it has been synced (geth folder current size: 48.7 GB) There are three folders in appdata: ...
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3answers
830 views

Are there ropsten ERC20 testnet tokens?

I am trying to write an application using web3.js and I want to integrate some ERC20 functionality. But rather than muddy up the mainnet, I'd like to try things on the Testnet first. I see that https:/...
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1answer
51 views

What is the difference between testnet and private networks?

I would like to make some improvements to ethereum's protocol and came across two terms- private network and testnet. What is the different between them? networks? Can other people see my nodes in ...
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1answer
354 views

How to start ethereum classic (ETC) testnet/morden node?

I want to be able to start a node that will sync to the ETC testnet (is that morden?) network and allow me to query over web3 (or other) interface. I tried all tutorials and documentations, I tried ...
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1answer
101 views

How to download test network in testnet with mist and run smart contracts using solidity on remix - ide?

I followed a youtube video, the link is https://www.youtube.com/watch?v=DEULs3ShTxo&list=PLnwIwnzAHNfi3mCaRDIXcQx8HtuWm1pqw&index=2 He said that while installing MIST, while downloading mist, ...
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1answer
122 views

Dealing with block delays in unit tests

Consider the following Truffle Unit Test written in JavaScript: const Lease = artifacts.require("./Lease.sol"); contract("Lease", async (accounts) ...
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Is there any testing exchange available to test smart contact from rinkeby test network?

I am working on a smart contract and thinking about future scope of the coin so I would like to ask. Is there any testing exchange available to test smart contact from rinkeby test network?