* changelog and version
* Add section on ABCI changes
* Update ABCI upgrade section to include events examples
* update upgrading
* more upgrading and changelog
* update changelog from pending
* refer to #rpc_changes
* minor word changes
- [abci/examples] \#3659 Change validator update tx format in the `persistent_kvstore` to use base64 for pubkeys instead of hex (@needkane)
- [consensus] \#3656 Exit if SwitchToConsensus fails
- [p2p] \#3666 Add per channel telemetry to improve reactor observability
- [rpc] [\#3686](https://github.com/tendermint/tendermint/pull/3686) `HTTPClient#Call` returns wrapped errors, so a caller could use `errors.Cause` to retrieve an error code. (@wooparadog)
### BUG FIXES:
- [libs/db] \#3717 Fixed the BoltDB backend's Batch.Delete implementation (@Yawning)
- [libs/db] \#3718 Fixed the BoltDB backend's Get and Iterator implementation (@Yawning)
- [node] \#3716 Fix a bug where `nil` is recorded as node's address
- [node] \#3741 Fix profiler blocking the entire node
- [abci] \#3193 Use RequestDeliverTx and RequestCheckTx in the ABCI interface
* Blockchain Protocol
@ -32,14 +22,5 @@
### FEATURES:
### IMPROVEMENTS:
- [consensus] \#3656 Exit if SwitchToConsensus fails
- [p2p] \#3666 Add per channel telemetry to improve reactor observability
- [rpc] [\#3686](https://github.com/tendermint/tendermint/pull/3686) `HTTPClient#Call` returns wrapped errors, so a caller could use `errors.Cause` to retrieve an error code. (@wooparadog)
- [abci/examples] \#3659 Change validator update tx format (incl. expected pubkey format, which is base64 now) (@needkane)
- [rpc] \#3724 RPC now binds to `127.0.0.1` by default instead of `0.0.0.0`
### BUG FIXES:
- [libs/db] \#3717 Fixed the BoltDB backend's Batch.Delete implementation (@Yawning)
- [libs/db] \#3718 Fixed the BoltDB backend's Get and Iterator implementation (@Yawning)
- [node] \#3716 Fix a bug where `nil` is recorded as node's address
- [node] \#3741 Fix profiler blocking the entire node
This guide provides steps to be followed when you upgrade your applications to
a newer version of Tendermint Core.
## v0.32.0
This release is compatible with previous blockchains,
however the new ABCI Events mechanism may create some complexity
for nodes wishing to continue operation with v0.32 from a previous version.
There are some minor breaking changes to the RPC.
### Config Changes
If you have `db_backend` set to `leveldb` in your config file, please change it
to `goleveldb` or `cleveldb`.
### RPC Changes
The default listen address for the RPC is now `127.0.0.1`. If you want to expose
it publicly, you have to explicitly configure it. Note exposing the RPC to the
public internet may not be safe - endpoints which return a lot of data may
enable resource exhaustion attacks on your node, causing the process to crash.
Any consumers of `/block_results` need to be mindful of the change in all field
names from CamelCase to Snake case, eg. `results.DeliverTx` is now `results.deliver_tx`.
This is a fix, but it's breaking.
### ABCI Changes
ABCI responses which previously had a `Tags` field now have an `Events` field
instead. The original `Tags` field was simply a list of key-value pairs, where
each key effectively represented some attribute of an event occuring in the
blockchain, like `sender`, `receiver`, or `amount`. However, it was difficult to
represent the occurence of multiple events (for instance, multiple transfers) in a single list.
The new `Events` field contains a list of `Event`, where each `Event` is itself a list
of key-value pairs, allowing for more natural expression of multiple events in
eg. a single DeliverTx or EndBlock. Note each `Event` also includes a `Type`, which is meant to categorize the
event.
For transaction indexing, the index key is
prefixed with the event type: `{eventType}.{attributeKey}`.
If the same event type and attribute key appear multiple times, the values are
appended in a list.
To make queries, include the event type as a prefix. For instance if you
previously queried for `recipient = 'XYZ'`, and after the upgrade you name your event `transfer`,
the new query would be for `transfer.recipient = 'XYZ'`.
Note that transactions indexed on a node before upgrading to v0.32 will still be indexed
using the old scheme. For instance, if a node upgraded at height 100,
transactions before 100 would be queried with `recipient = 'XYZ'` and
transactions after 100 would be queried with `transfer.recipient = 'XYZ'`.
While this presents additional complexity to clients, it avoids the need to
reindex. Of course, you can reset the node and sync from scratch to re-index
entirely using the new scheme.
We illustrate further with a more complete example.
Prior to the update, suppose your `ResponseDeliverTx` look like:
```go
abci.ResponseDeliverTx{
Tags: []cmn.KVPair{
{Key: []byte("sender"), Value: []byte("foo")},
{Key: []byte("recipient"), Value: []byte("bar")},
{Key: []byte("amount"), Value: []byte("35")},
}
}
```
The following queries would match this transaction:
```go
query.MustParse("tm.event = 'Tx' AND sender = 'foo'")
query.MustParse("tm.event = 'Tx' AND recipient = 'bar'")
query.MustParse("tm.event = 'Tx' AND sender = 'foo' AND recipient = 'bar'")
```
Following the upgrade, your `ResponseDeliverTx` would look something like:
the following `Events`:
```go
abci.ResponseDeliverTx{
Events: []abci.Event{
{
Type: "transfer",
Attributes: cmn.KVPairs{
{Key: []byte("sender"), Value: []byte("foo")},
{Key: []byte("recipient"), Value: []byte("bar")},
{Key: []byte("amount"), Value: []byte("35")},
},
}
}
```
Now the following queries would match this transaction:
```go
query.MustParse("tm.event = 'Tx' AND transfer.sender = 'foo'")
query.MustParse("tm.event = 'Tx' AND transfer.recipient = 'bar'")
query.MustParse("tm.event = 'Tx' AND transfer.sender = 'foo' AND transfer.recipient = 'bar'")
```
For further documentation on `Events`, see the [docs](https://github.com/tendermint/tendermint/blob/60827f75623b92eff132dc0eff5b49d2025c591e/docs/spec/abci/abci.md#events).
### Go Applications
The ABCI Application interface changed slightly so the CheckTx and DeliverTx
methods now take Request structs. The contents of these structs are just the raw
tx bytes, which were previously passed in as the argument.
## v0.31.6
There are no breaking changes in this release except Go API of p2p and
Ethan Buchman
6 years ago
GitHub