conesnsu: follow up to removing some consensus params (#2427)

* follow up to removing some consensus params Refs #2382
* change args type to int64 in state#makeParams
* make valsCount and evidenceCount ints again
* MaxEvidenceBytesPerBlock: include magic number in godoc
* [spec] creating a proposal
* test state#TxFilter
* panic if MaxDataBytes is less than 0
* fixes after review
* use amino#UvarintSize to calculate overhead
https://github.com/tendermint/go-amino/blob/0c74291f3bb61e24f8ea1d13148cece479f79d35/encoder.go#L85-L90
* avoid cyclic imports
* you can do better Go, come on
* remove testdouble package

node/node.go

@@ -250,16 +250,12 @@ func NewNode(config *cfg.Config,
 	csMetrics, p2pMetrics, memplMetrics := metricsProvider()
 
 	// Make MempoolReactor
-	maxDataBytes := types.MaxDataBytesUnknownEvidence(
-		state.ConsensusParams.BlockSize.MaxBytes,
-		state.Validators.Size(),
-	)
 	mempool := mempl.NewMempool(
 		config.Mempool,
 		proxyApp.Mempool(),
 		state.LastBlockHeight,
 		mempl.WithMetrics(memplMetrics),
-		mempl.WithFilter(func(tx types.Tx) bool { return len(tx) <= maxDataBytes }),
+		mempl.WithFilter(sm.TxFilter(state)),
 	)
 	mempoolLogger := logger.With("module", "mempool")
 	mempool.SetLogger(mempoolLogger)