minimum essential config to get rpc working for #testnet4 for app testing #configstr
testnet4 works with bitcoin core 28.0 only and not yet with knots or anything else known for now
bitcoin.conf --- in custom folder
---start---
uacomment=captjacktestingnow
datadir=/wherever/you/want
includeconf=bitcoin.conf
chain=testnet4
blocksonly=1
dbcache=800
maxmempool=1000
maxconnections=10
discover=0
#prune=3000
[testnet4]
server=1
rpcuser=username
rpcpassword=password
rpcbind=127.0.0.1
rpcallowip=127.0.0.1

---end---
add remove alter any port as needed by app e.g. btcpayserver or nbx-explorer