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I would like to create a private network for test. And I would like to connect to this private network from commandline client or Ethereum wallet/mint.

I have created a private network as below. 

geth --datadir=./chaindata init genesis.json

The content of genesis.json is genesis.json

Afterwards, I have started private network with following commands. (I have tried both of these commands seperately)

geth --datadir=./chaindata 
geth --datadir=./chaindata --networkid 15

Afterwards, I have opened another terminal and try to connect running private network. But it does not connect.

geth attach

I have realised it is trying to connect default geth.ipc which is not running and I have send the running private network's geth.ipc as parameter and I is solved.

geth attach ~/chaindata/geth.ipc

But, I could not change the default geth.ipc for Mist or Ethereum Wallet. How can I connect Ethereum Wallet/Mist to private network?

Ethereum Wallet/Mist error message during startup

Couldn't connect to node? See the logs for more:
...
...
INFO [07-16|15:47:51] Starting P2P networking 
Fatal: Error starting protocol stack: listen udp :30303: bind:   address already in use
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  • it seems running geth like this: geth --datadir=./chaindata --networkid 15 --ipcpath /Users/{user-name}/Library/Ethereum/geth.ipc
    – karfkars
    Commented Jul 16, 2017 at 13:17
  • I have found the solution here: stackoverflow.com/questions/36661738/…
    – karfkars
    Commented Jul 16, 2017 at 13:18

5 Answers 5

Reset to default
5

to start a local test network you can now use

geth --dev

once you do, take note of where it has actually created it by reading the line:

IPC endpoint opened: /var/folders/y1/jynwfrwj411bxck8whqgcbr00000gq/T/ethereum_dev_mode/geth.ipc

Then to have MIST connect to the private network type this in your terminal (MAC version)

open -a /Applications/Mist.app --args --rpc /var/folders/y1/jynwfrwj411bxck8whqgcbr00000gq/T/ethereum_dev_mode/geth.ipc

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1
  • Is this the only way to do it in Terminal? Could you do geth --datadir ./chaindata then something like geth attach /var/folders/2k/p756_j5x0x5fqplwrq74j1sh0000gn/T/geth.ipc? Is geth --dev the only way to start the test network? Btw, test network refers to your own private 80GB node correct?
    – Edison
    Commented Apr 13, 2018 at 3:24
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you can open the Mist using the following command:

open -a /Applications/Mist.app --args --rpcport "8001" --rpc  <node path>/geth.ipc

Please just replace the location of the mist.app if it's different than yours, and change the port if you are using different port.

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1

Creation of the blockchain looks fine.

Be sure that Mist is closed.

Then start a geth node with

geth --datadir ./chaindata

open a new console and attach a Javascript Console with

geth attach

Then start the Mist wallet and you should be connected to your private network.

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1
  • Has anyone confirmed this method? It does not work for me. The above method by b25 works for me. geth --datadir ./chaindata does not start a test network. It only starts a node. You could do geth attach /var/folders/2k/p756_j5x0x5fqplwrq74j1sh0000gn/T/geth.ipc but that won't work as well.
    – Edison
    Commented Apr 13, 2018 at 3:21
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Try just building against the test network using npm install -g ethereum-testrpc, then deploy your code and test on livenet. You would have to build Mist/EWalet against test net in order to test it. Check out https://github.com/ethereumjs/testrpc/blob/master/README.md for more info.

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0

To start Mist is actually: /Applications/Mist.app/Contents/MacOS/Mist --rpc 127.0.0.1:8501

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