Is the testnet centralized? Like is there a foundation that maintains the testnet nodes? Or is it just a lot of people who want to support testing?

1 Answer 1


if you go give a look at the config file of geth https://github.com/ethereum/go-ethereum/blob/master/params/config.go.

You see:

  • at line 34, chainId is 1 refers to the mainnet
  • at line 49, chainId is 3 refers to ropsten testnet
  • at line 64, chainId is 4 refers to rinkeby testnet

to access kovan, you need the parity client.

Those public testnets are the initiative of the ethereum foundation or the parity team. But everyone is free to join (by that I mean running a mining node to help supporting the testnet). However as the coins (test-ether) on those network do not have any value there is no economic incentive to run a node. So those networks are mainly maintained by the developer teams and some enthusiasts

  • 1
    "those networks are mainly maintained by the developer teams and some enthusiasts " was the answer. Thank you.
    – stone.212
    Commented Feb 1, 2018 at 9:49
  • Follow up question. Is there a way to find out how many nodes are in each testnet?
    – stone.212
    Commented Feb 1, 2018 at 9:49
  • kind of: rinkeby has a dedicated stats website rinkeby.io/#stats otherwise etherscan provides charts for every network. For example for ropsten ropsten.etherscan.io/charts but hey there google should be your friend (what I just did)
    – salanfe
    Commented Feb 1, 2018 at 9:55
  • As far as I know, the difficulty to mine blocks is extremely easy in the testnet...
    – ccov77
    Commented Aug 9, 2020 at 20:00

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