get https://rpc.cosmos.directory/cosmoshub/broadcast_tx_sync
If you want to be sure that the transaction is included in a block, you can
subscribe for the result using JSONRPC via a websocket. See
https://docs.cometbft.com/v0.38.x/core/subscription.html
If you haven't received anything after a couple of blocks, resend it. If the
same happens again, send it to some other node. A few reasons why it could
happen:
- malicious node can drop or pretend it had committed your tx
- malicious proposer (not necessary the one you're communicating with) can
drop transactions, which might become valid in the future
(https://github.com/tendermint/tendermint/issues/3322)
Please refer to formatting/encoding rules
for additional details