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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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1answer
8 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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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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How to set sealers in extradata genesis block in PoA?

Which is the sintaxis to set up the sealers in extradata field? This is an example: "extraData": "...
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20 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
27 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
21 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
21 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
25 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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0answers
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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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45 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
43 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
41 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
26 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
47 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
142 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
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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
35 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
193 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
109 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
94 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
96 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
146 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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1answer
208 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
342 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
113 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
29 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
218 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
49 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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0answers
30 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
62 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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1answer
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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
164 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
234 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
38 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
104 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
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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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68 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
71 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
305 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
130 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
157 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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2answers
384 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
112 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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2answers
470 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
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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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94 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
61 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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80 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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0answers
27 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 ...