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docs: move subscription to tendermint-core (#5323)

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## Description

- Move subscriptions to tendermint-core section. 

- Remove unused photot

Closes: #XXX
This commit is contained in:
Marko
2020-09-02 14:53:29 +00:00
committed by GitHub
parent 710a97d850
commit c2ce5e6f35
10 changed files with 11 additions and 12 deletions
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docs/app-dev/indexing-transactions.md
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# Indexing Transactions
Tendermint allows you to index transactions and later query or subscribe
to their results.
Tendermint allows you to index transactions and later query or subscribe to their results.
Events can be used to index transactions and blocks according to what happened
during their execution. Note that the set of events returned for a block from
@@ -78,9 +77,8 @@ func (app *KVStoreApplication) DeliverTx(req types.RequestDeliverTx) types.Resul
}
```
The transaction will be indexed (if the indexer is not `null`) with a certain
attribute if the attribute's `Index` field is set to `true`. In the above
example, all attributes will be indexed.
The transaction will be indexed (if the indexer is not `null`) with a certain attribute if the attribute's `Index` field is set to `true`.
In the above example, all attributes will be indexed.
## Querying Transactions
docs/app-dev/subscribing-to-events-via-websocket.md
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---
order: 5
---
# Subscribing to events via Websocket
Tendermint emits different events, which you can subscribe to via
[Websocket](https://en.wikipedia.org/wiki/WebSocket). This can be useful
for third-party applications (for analysis) or for inspecting state.
[List of events](https://godoc.org/github.com/tendermint/tendermint/types#pkg-constants)
To connect to a node via websocket from the CLI, you can use a tool such as
[wscat](https://github.com/websockets/wscat) and run:
```sh
wscat ws://127.0.0.1:26657/websocket
```
You can subscribe to any of the events above by calling the `subscribe` RPC
method via Websocket along with a valid query.
```json
{
"jsonrpc": "2.0",
"method": "subscribe",
"id": 0,
"params": {
"query": "tm.event='NewBlock'"
}
}
```
Check out [API docs](https://docs.tendermint.com/master/rpc/) for
more information on query syntax and other options.
You can also use tags, given you had included them into DeliverTx
response, to query transaction results. See [Indexing
transactions](./indexing-transactions.md) for details.
## ValidatorSetUpdates
When validator set changes, ValidatorSetUpdates event is published. The
event carries a list of pubkey/power pairs. The list is the same
Tendermint receives from ABCI application (see [EndBlock
section](https://github.com/tendermint/spec/blob/master/spec/abci/abci.md#endblock) in
the ABCI spec).
Response:
```json
{
"jsonrpc": "2.0",
"id": 0,
"result": {
"query": "tm.event='ValidatorSetUpdates'",
"data": {
"type": "tendermint/event/ValidatorSetUpdates",
"value": {
"validator_updates": [
{
"address": "09EAD022FD25DE3A02E64B0FE9610B1417183EE4",
"pub_key": {
"type": "tendermint/PubKeyEd25519",
"value": "ww0z4WaZ0Xg+YI10w43wTWbBmM3dpVza4mmSQYsd0ck="
},
"voting_power": "10",
"proposer_priority": "0"
}
]
}
}
}
}
```