following the instructions in the alpha-README.md file on GitHub
in step number 2, to start alphad it is suggested to do:

./alphad -rpcuser=$RPC_USER -rpcpassword=$RPC_PASS -testnet -rpcconnect= -rpcconnectport=18332 -tracksidechain=all -txindex -blindtrust=true -daemon

my question is about the rpcconnectport=18332
why 18332 instead of 4241? like in step 5

1 Answer 1


Because in order to validate sidechain transfers, alphad needs to connect to a testnet bitcoind. The rpcconnect-like flags passed to it are information about how it can do that, so you need to use the running bitcoind's port.

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