I have a parity chain spec file that I'm running on several nodes in a private network. I need to run a geth node and connect it to this private network.
How do I use this chain spec file to connect geth to the private network?
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keorn's chain spec converter is a usefull tool to convert geth chain specs, but I do not know of any tool working the other way around.
It's best to start with a working set of genesis files and chain specs for both clients. Since this question keeps coming up, I created a working chainspec for both clients:
git clone https://github.com/5chdn/crossclient-chainspec cd crossclient-chainspec
$ geth init --datadir ~/.ethereum/crossclient geth.json $ geth --datadir ~/.ethereum/crossclient --networkid 1337 --port 31333 --rpcport 8538
$ parity --chain parity.json --port 31337 --jsonrpc-port 8539