## Description

This PR removes simple prefix from all types in the crypto/merkle directory.

The two proto types `Proof` & `ProofOp` have been moved to the `proto/crypto/merkle` directory.

proto messge `Proof` was renamed to `ProofOps` and `SimpleProof` message to `Proof`. 

Closes: #2755

LastCommitRound should always be >= 0 for heights > 1.

In State.updateToState, last precommit is computed  only when round
greater than -1 and has votes. But "LastCommit" is always updated
regardless of the condition. If there's no last precommit, "LastCommit"
is set to (*types.VoteSet)(nil). That's why "LastCommit" can be -1 for
heights > 1.

To fix it, only update State.RoundState.LastCommit when there is last
precommit.

Fixes #2737

Co-authored-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>

## Description

deprecation & removal of multisig. This key was only used in the sdk and now it has been added there

Closes: #4715 
Closes: #2163

## Description

migration of evidence reactor to proto

Closes: #XXX

Closes #4763

* check for Error after for loop ends

so we don't silently ignore errors, which would lead to clients getting
incomplete results

Refs https://github.com/tendermint/tendermint/pull/4979/files#r436511572

## Description

migration of blockchain reactors to protobuf

Closes: #XXX

Uses new JSON encoder in #4955 for all JSON. Branched off of #4968.

Closes #4681

## Description

migrate p2p/pex to protobuf

Closes: #XXX

## Description

migrate store to protobuf

Closes: #XXX

See: https://github.com/tendermint/tendermint/pull/4969#pullrequestreview-425298225

## Description

Add json tags to duplicate evidence 

Closes: #4958

run a validate basic on inbound validator sets and headers before further processing them

* rpc/core: return an error if `page=0`

Closes #4942

affected endpoints:

- /validators
- /tx_search

* swagger: update doc for /unconfirmed_txs

Closes: #4578

Co-authored-by: Anton Kaliaev <anton.kalyaev@gmail.com>

This PR removes lite & renames lite2 to light throughout the repo

Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>

Closes: #4944

## Description



Closes: #XXX

Closes #4801

* lite2: check header w/ witnesses only when doing bisection

Closes #4872

We don't need to check witnesses if we're doing backwards hash chain
verification. I also think we don't need to do it when sequential
verification is being used.

* lite2: require 1 witness only when verificationMode=skipping

https://github.com/tendermint/tendermint/pull/4929#pullrequestreview-423256477

we don't need witnesses when performing sequential verification (except
when primary fails)

## Description

- remove keyname suffix from keys


Closes: #2228

* proto: move mempool to proto

- changes according to moving the mempool reactor to proto

Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>

Closes: #2883

Ethermint currently has to maintain a map height-> block hash on the store (see here) as it needs to expose the eth_getBlockByHash JSON-RPC query for Web3 compatibility. This query is currently not supported by the tendermint RPC client.

Final step of a point release.

## Description

in consensus/state.go, when calulating metrics, retrieve address (ergo, pubkey) once prior to iterating over validatorset to ensure we do not make excessive calls to signer.

Partially closes: #4865

## Description

In https://github.com/tendermint/tendermint/pull/4466 a new type was created (EventAttribute) that replaced KV.Pair. This made the type Pair deadcode, this pr removes that type.

I don't think a changelog entry is needed since it is not being used anymore. But will add a section to the upgrading.md to let users know that it was replaced

Closes: #XXX

Closes #4846 
Spec https://github.com/tendermint/spec/pull/96

in /validators, /consensus_params and /status

Closes #3161

prevent proposer from proposing duplicate pieces of evidence

Closes https://github.com/tendermint/tendermint/issues/3857

Moves `lib/` folder to `jsonrpc/`.

Renames:

**packages**

`rpc` package -> `jsonrpc` package
`rpcclient` package -> `client` package
`rpcserver` package -> `server` package

**structs and interfaces**

```
JSONRPCClient to Client
JSONRPCRequestBatch to RequestBatch
JSONRPCCaller to Caller
```

**functions**

```
StartHTTPServer to Serve
StartHTTPAndTLSServer to ServeTLS

rpc/jsonrpc/client: rename NewURIClient to NewURI

NewJSONRPCClient to New
NewJSONRPCClientWithHTTPClient to NewWithHTTPClient
NewWSClient to NewWS
```

**misc**

- unexpose `ResponseWriterWrapper`
- remove unused http_params.go

Closes #3433

## Description

bech32 is only used in the sdk. I moved Bech32 to the sdk and we can remove it here. Don't think this needs to go into a minor release

Closes: #XXX

returning an error

Closes #4707

The number of evidence that can be committed in a single block is capped by a new evidence parameter called MaxNum

Closes #2998

Spec PR: https://github.com/tendermint/spec/pull/94

allow ReapX and CheckTx functions to run in parallel, making it not possible to block certain proposers from creating a new block.

Closes: #2972

Fixes #4802. The Go HTTP server has a global panic handler for requests, so it was not as severe as first thought.

This fix can still panic, since we try to send a `500` response - if that happens, the Go HTTP server will terminate the connection. Otherwise, the client will get a 200 response, which we should avoid. I'm sort of torn on whether it's even necessary to include this fix, instead of just letting the HTTP server deal with it.

Closes #4783 

It looks like we're validating Commit twice. Also, height and blockID params were coming from the commit, so no need to pass them separately.

thus enabling faster commit verification assuming non uniform distribution of power.

Closes #2478

spec: https://github.com/tendermint/spec/pull/91

* remove panic & todo in secret_connection

in VerifyCommitTrusting

Closes #4755

This is useful for custom state sync `StateProvider` implementations that need to build new states for bootstrapping the node. It will also be useful when implementing other mechanisms to bootstrap nodes, e.g. #4642 and #3713.