haveno/apitest/docs/regtest-port-conflicts.md
2021-05-04 20:20:01 -04:00

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# Avoiding bitcoin-core regtest port conflicts
Some developers may already be running a `bitcoind` or `bitcoin-qt` instance in regtest mode when they try to run API
test cases. If a `bitcoin-qt` instance is bound to the default regtest port 18444, `apitest` will not be able to start
its own bitcoind instances.
Though it would be preferable for `apitest` to change the bind port for Bisq's `bitcoinj` module at runtime, this is
not currently possible because `bitcoinj` hardcodes the default regtest mode bind port in `RegTestParams`.
To avoid the bind address:port conflict, pass a port option to your bitcoin-core instance:
bitcoin-qt -regtest -port=20444