What you mean with "a channel"?
You send your post to one or more relay, other clients subscribe to these relays and so be notified by new content. If two user don't share a common relay is possibile that they cannot read each other.
Check https://nostr.how for a introduction to Nostr.
dtonon / daniele
npub100…8vwqk
2023-03-03 23:51:55 UTC
in reply to nevent1q…lslm
Author Public Key
npub10000003zmk89narqpczy4ff6rnuht2wu05na7kpnh3mak7z2tqzsv8vwqkSeen on
wss://nos.lolPublished at
2023-03-03 23:51:55 UTCEvent JSON
{
"id": "0000002e74eb20d8a6c51b2b79adf481f4b277bcfc92bb6a2df05c6416454806",
"pubkey": "7bdef7be22dd8e59f4600e044aa53a1cf975a9dc7d27df5833bc77db784a5805",
"created_at": 1677887515,
"kind": 1,
"tags": [
[
"p",
"22e2e20f26ef6c55c7532326d0fd870bcce280ac15d43b3b7c98fd3483684ef8"
],
[
"e",
"3b5fe10d7eb59a90da9abee2227764eb80a6aeafe9e90bcdf1e20128e05709fa",
"wss://brb.io",
"root"
],
[
"e",
"8ec1cee9b34d337254a7a44b6aff30c69449ad5a0662b17a9fbbfdc72aa78d1a",
"wss://filter.nostr.wine/npub10000003zmk89narqpczy4ff6rnuht2wu05na7kpnh3mak7z2tqzsv8vwqk?broadcast=true",
"reply"
],
[
"nonce",
"9223372036856927315",
"25"
]
],
"content": "What you mean with \"a channel\"?\nYou send your post to one or more relay, other clients subscribe to these relays and so be notified by new content. If two user don't share a common relay is possibile that they cannot read each other.\nCheck https://nostr.how for a introduction to Nostr.",
"sig": "1ab160f09c27eff0eb9c1b8b8748d276835d71e24f0a3683564be7d1e11e090ee1ff29384df8eec5e530ec9e186473e2dc1c3615bc220c1a9f1b6e15a4059a75"
}