Closes #5106

* mempool: length prefix txs when getting them from mempool (#5483)

* correctly calculate evidence data size (#5482)

* block: use commit sig size instead of vote size (#5490)

* tx: reduce function to one parameter (#5493)

Closes #5145

also applies to light/client

evidence: modify evidence types (#5342)

light: detect light client attacks (#5344)

evidence: refactor evidence pool (#5345)

abci: application evidence prepared by evidence pool (#5354)

## Description

Enable errcheck linter throughout the codebase

Closes: #5059

## Description

Work towards enabling errcheck

ref #5059

* docs: goleveldb is much more stable now

Refs https://github.com/syndtr/goleveldb/issues/226#issuecomment-682495490

* rpc/core/events: make sure WS client receives every event

previously, if the write buffer was full, the response would've been
lost without any trace (log msg, etc.)

* rpc/jsonrpc/server: set defaultWSWriteChanCapacity to 1

Refs #3905
Closes #3829

setting write buffer capacity to 1 makes transactions count per block
more stable and also reduces the pauses length by 20s.

before: https://github.com/tendermint/tendermint/issues/3905#issuecomment-681854328 net.Read - 20s
after: net.Read - 0.66s

* rpc/jsonrpc/server: buffer writes and avoid io.ReadAll during read

## Description

Remove ConflictingHeaders & compositeEvidence types


Ref #5288

## Description

Allow dialing of private and unconditional peers through the RPC

Closes: #1705

## Description

This PR aims to make the crypto.PubKey interface more intuitive. 

Changes: 

- `VerfiyBytes` -> `VerifySignature`

Before `Bytes()` was amino encoded, now since it is the byte representation should we get rid of it entirely?

EDIT: decided to keep `Bytes()` as it is useful if you are using the interface instead of the concrete key

Closes: #XXX

adds blockstore interface to evidence and adds fix to byzantine test

Closes #3410

## Description

This PR wraps the stdlib sync.(RW)Mutex & godeadlock.(RW)Mutex. This enables using go-deadlock via a build flag instead of using sed to replace sync with godeadlock in all files

Closes: #3242

## Description

partially cleanup in preparation for errcheck

i ignored a bunch of defer errors in tests but with the update to go 1.14 we can use `t.Cleanup(func() { if err := <>; err != nil {..}}` to cover those errors, I will do this in pr number two of enabling errcheck.

ref #5059

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

fix bug so that PotentialAmnesiaEvidence is being gossiped

handle inbound amnesia evidence correctly

add method to check if potential amnesia evidence is on trial

fix a bug with the height when we upgrade to amnesia evidence

change evidence to using just pointers.

More logging in the evidence module

Co-authored-by: Marko <marbar3778@yahoo.com>

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Closes #4549

Migrates the `rpc` package to use new JSON encoder in #4955. Branched off of that PR.

Tests pass, but I haven't done any manual testing beyond that. This should be handled as part of broader 0.34 testing.

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

Closes #4942

affected endpoints:

- /validators
- /tx_search

* swagger: update doc for /unconfirmed_txs

## Description

- remove keyname suffix from keys


Closes: #2228

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.

## Description

I was able to reproduce this non-determinism locally
After increasing the timeout to 8 seconds from 5 I was not able to reproduce it

Closes: #2856

Mitigates race condition causing these test failures:

```
=== RUN   TestTxEventsSentWithBroadcastTxAsync
=== RUN   TestTxEventsSentWithBroadcastTxAsync/*http.HTTP
I[2020-05-25|12:29:08.477] Starting WSEvents service                    impl=WSEvents
    TestTxEventsSentWithBroadcastTxAsync/*http.HTTP: event_test.go:124: 
        	Error Trace:	event_test.go:124
        	Error:      	Expected nil, but got: &errors.errorString{s:"timed out waiting for event"}
        	Test:       	TestTxEventsSentWithBroadcastTxAsync/*http.HTTP
        	Messages:   	0: timed out waiting for event
```

Fixes race conditions causing the following test failures:

```
=== RUN   TestUnconfirmedTxs
    TestUnconfirmedTxs: rpc_test.go:342:
                Error Trace:    rpc_test.go:342
                Error:          Not equal:
                                expected: 1
                                actual  : 0
                Test:           TestUnconfirmedTxs
    TestUnconfirmedTxs: rpc_test.go:343:
                Error Trace:    rpc_test.go:343
                Error:          Not equal:
                                expected: 1
                                actual  : 0
                Test:           TestUnconfirmedTxs
    TestUnconfirmedTxs: rpc_test.go:345:
                Error Trace:    rpc_test.go:345
                Error:          Not equal:
                                expected: types.Txs{types.Tx{0x39, 0x44, 0x4d, 0x6c, 0x4b, 0x66, 0x46, 0x78, 0x3d, 0x45, 0x33, 0x33, 0x68, 0x47, 0x6e, 0x79, 0x58}}
                                actual  : types.Txs(nil)

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1,4 +1,2 @@
                                -(types.Txs) (len=1) {
                                - (types.Tx) (len=17) Tx{39444D6C4B6646783D45333368476E7958}
                                -}
                                +(types.Txs) <nil>

                Test:           TestUnconfirmedTxs
    TestUnconfirmedTxs: rpc_test.go:342:
                Error Trace:    rpc_test.go:342
                Error:          Not equal:
                                expected: 1
                                actual  : 0
                Test:           TestUnconfirmedTxs
    TestUnconfirmedTxs: rpc_test.go:343:
                Error Trace:    rpc_test.go:343
                Error:          Not equal:
                                expected: 1
                                actual  : 0
                Test:           TestUnconfirmedTxs
    TestUnconfirmedTxs: rpc_test.go:345:
                Error Trace:    rpc_test.go:345
                Error:          Not equal:
                                expected: types.Txs{types.Tx{0x39, 0x44, 0x4d, 0x6c, 0x4b, 0x66, 0x46, 0x78, 0x3d, 0x45, 0x33, 0x33, 0x68, 0x47, 0x6e, 0x79, 0x58}}
                                actual  : types.Txs{}

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1,3 +1,2 @@
                                -(types.Txs) (len=1) {
                                - (types.Tx) (len=17) Tx{39444D6C4B6646783D45333368476E7958}
                                +(types.Txs) {
                                 }
                Test:           TestUnconfirmedTxs
--- FAIL: TestUnconfirmedTxs (0.20s)
=== RUN   TestNumUnconfirmedTxs
    TestNumUnconfirmedTxs: rpc_test.go:364:
                Error Trace:    rpc_test.go:364
                Error:          Not equal:
                                expected: 1
                                actual  : 0
                Test:           TestNumUnconfirmedTxs
    TestNumUnconfirmedTxs: rpc_test.go:365:
                Error Trace:    rpc_test.go:365
                Error:          Not equal:
                                expected: 1
                                actual  : 0
                Test:           TestNumUnconfirmedTxs
    TestNumUnconfirmedTxs: rpc_test.go:364:
                Error Trace:    rpc_test.go:364
                Error:          Not equal:
                                expected: 1
                                actual  : 0
                Test:           TestNumUnconfirmedTxs
    TestNumUnconfirmedTxs: rpc_test.go:365:
                Error Trace:    rpc_test.go:365
                Error:          Not equal:
                                expected: 1
                                actual  : 0
                Test:           TestNumUnconfirmedTxs
--- FAIL: TestNumUnconfirmedTxs (0.09s)
```

Fixes the following test race condition:

```
=== RUN   TestAppCalls
    TestAppCalls: rpc_test.go:216:
                Error Trace:    rpc_test.go:216
                Error:          Expected value not to be nil.
                Test:           TestAppCalls
--- FAIL: TestAppCalls (2.20s)
```

## Description

various linitng fixes

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 #4603

Commands used (VIM):

```
:args `rg -l errors.Wrap`
:argdo normal @q | update
```

where q is a macros rewriting the `errors.Wrap` to `fmt.Errorf`.

this pr brings over the removal of pubkey from duplicatevote evidence from proto-breakage

ref #4580

The PR added a new field `index` to event attribute, that will cause indexer service to index the event if set to true.

Closes: #4530

This PR contains logic for both submitting an evidence by the light client (lite2 package) and receiving it on the Tendermint side (/broadcast_evidence RPC and/or EvidenceReactor#Receive). Upon receiving the ConflictingHeadersEvidence (introduced by this PR), the Tendermint validates it, then breaks it down into smaller pieces (DuplicateVoteEvidence, LunaticValidatorEvidence, PhantomValidatorEvidence, PotentialAmnesiaEvidence). Afterwards, each piece of evidence is verified against the state of the full node and added to the pool, from which it's reaped upon block creation.

* rpc/client: do not pass height param if height ptr is nil

* rpc/core: validate incoming evidence!

* only accept ConflictingHeadersEvidence if one

of the headers is committed from this full node's perspective

This simplifies the code. Plus, if there are multiple forks, we'll
likely to receive multiple ConflictingHeadersEvidence anyway.

* swap CommitSig with Vote in LunaticValidatorEvidence

Vote is needed to validate signature

* no need to embed client

http is a provider and should not be used as a client

Closes: #4695

Verify /block_results and /validators responses from an HTTP client using the light client.

Added count and total to /validators response.

Refs #3113

* rpc/client: initial split into directories

* lite2: split out test package

* rpc/client: simplify client constructurs

* updated docs

* updated changelog

Closes: #4606

* format: add format cmd & goimport repo

- replaced format command
- added goimports to format command
- ran goimports

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

* fix outliers & undo proto file changes

but HTTP client is not running.

`Subscribe`, `Unsubscribe(All)` methods return an error now.

Closes #4568