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15_3_Receiving_Bitcoind_Notifications_with_C.md
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@ -12,7 +12,7 @@ Before you can create a blockchain listener, you will need to configure `bitcoin
### Configuring `bitcoind` for ZMQ ### Configuring `bitcoind` for ZMQ
Bitcoin Core is is ZMQ-ready, but you must specify ZMQ endpoints. ZeroMQ publish-sockets prepend each data item with an arbitrary topic Bitcoin Core is ZMQ-ready, but you must specify ZMQ endpoints. ZeroMQ publish-sockets prepend each data item with an arbitrary topic
prefix that allows subscriber clients to request only those items with a matching prefix. There are currently four topics supported by `bitcoind`: prefix that allows subscriber clients to request only those items with a matching prefix. There are currently four topics supported by `bitcoind`:
``` ```
$ bitcoind --help | grep zmq | grep address $ bitcoind --help | grep zmq | grep address