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diff --git a/context.go b/context.go
deleted file mode 100644
index 75677f0857..0000000000
--- a/context.go
+++ /dev/null
@@ -1,109 +0,0 @@
-package sdk
-
-import (
-	"bytes"
-	"fmt"
-	"sort"
-
-	wire "github.com/tendermint/go-wire"
-	"github.com/tendermint/go-wire/data"
-	"github.com/tendermint/tmlibs/log"
-)
-
-// Actor abstracts any address that can authorize actions, hold funds,
-// or initiate any sort of transaction.
-//
-// It doesn't just have to be a pubkey on this chain, it could stem from
-// another app (like multi-sig account), or even another chain (via IBC)
-type Actor struct {
-	ChainID string     `json:"chain"` // this is empty unless it comes from a different chain
-	App     string     `json:"app"`   // the app that the actor belongs to
-	Address data.Bytes `json:"addr"`  // arbitrary app-specific unique id
-}
-
-// NewActor - create a new actor
-func NewActor(app string, addr []byte) Actor {
-	return Actor{App: app, Address: addr}
-}
-
-// Bytes makes a binary coding, useful for turning this into a key in the store
-func (a Actor) Bytes() []byte {
-	return wire.BinaryBytes(a)
-}
-
-// Equals checks if two actors are the same
-func (a Actor) Equals(b Actor) bool {
-	return a.ChainID == b.ChainID &&
-		a.App == b.App &&
-		bytes.Equal(a.Address, b.Address)
-}
-
-// Empty checks if the actor is not initialized
-func (a Actor) Empty() bool {
-	return a.ChainID == "" && a.App == "" && len(a.Address) == 0
-}
-
-// WithChain creates a copy of the actor with a different chainID
-func (a Actor) WithChain(chainID string) (b Actor) {
-	b = a
-	b.ChainID = chainID
-	return
-}
-
-type Actors []Actor
-
-func (a Actors) AllHaveChain(chainID string) bool {
-	for _, b := range a {
-		if b.ChainID != chainID {
-			return false
-		}
-	}
-	return true
-}
-
-// Context is an interface, so we can implement "secure" variants that
-// rely on private fields to control the actions
-type Context interface {
-	// context.Context
-	log.Logger
-	WithPermissions(perms ...Actor) Context
-	HasPermission(perm Actor) bool
-	GetPermissions(chain, app string) []Actor
-	IsParent(ctx Context) bool
-	Reset() Context
-	ChainID() string
-	BlockHeight() uint64
-}
-
-//////////////////////////////// Sort Interface
-// USAGE sort.Sort(ByAll(<actor instance>))
-
-func (a Actor) String() string {
-	return fmt.Sprintf("%x", a.Address)
-}
-
-// ByAll implements sort.Interface for []Actor.
-// It sorts be the ChainID, followed by the App, followed by the Address
-type ByAll []Actor
-
-// Verify the sort interface at compile time
-var _ sort.Interface = ByAll{}
-
-func (a ByAll) Len() int      { return len(a) }
-func (a ByAll) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
-func (a ByAll) Less(i, j int) bool {
-
-	if a[i].ChainID < a[j].ChainID {
-		return true
-	}
-	if a[i].ChainID > a[j].ChainID {
-		return false
-	}
-	if a[i].App < a[j].App {
-		return true
-	}
-	if a[i].App > a[j].App {
-		return false
-	}
-	return bytes.Compare(a[i].Address, a[j].Address) == -1
-}
diff --git a/x/auth/bench_test.go b/x/auth/bench_test.go
deleted file mode 100644
index 66a5511d57..0000000000
--- a/x/auth/bench_test.go
+++ /dev/null
@@ -1,77 +0,0 @@
-package auth
-
-import (
-	"fmt"
-	"testing"
-
-	crypto "github.com/tendermint/go-crypto"
-	cmn "github.com/tendermint/tmlibs/common"
-
-	sdk "github.com/cosmos/cosmos-sdk"
-	"github.com/cosmos/cosmos-sdk/state"
-	"github.com/cosmos/cosmos-sdk/util"
-)
-
-func makeSignTx() interface{} {
-	key := crypto.GenPrivKeyEd25519().Wrap()
-	payload := cmn.RandBytes(32)
-	tx := newSingle(payload)
-	Sign(tx, key)
-	return tx
-}
-
-func makeMultiSignTx(cnt int) interface{} {
-	payload := cmn.RandBytes(32)
-	tx := newMulti(payload)
-	for i := 0; i < cnt; i++ {
-		key := crypto.GenPrivKeyEd25519().Wrap()
-		Sign(tx, key)
-	}
-	return tx
-}
-
-func makeHandler() sdk.Handler {
-	return sdk.ChainDecorators(
-		Signatures{},
-	).WithHandler(
-		util.OKHandler{},
-	)
-}
-
-func BenchmarkCheckOneSig(b *testing.B) {
-	tx := makeSignTx()
-	h := makeHandler()
-	store := state.NewMemKVStore()
-	for i := 1; i <= b.N; i++ {
-		ctx := util.MockContext("foo", 100)
-		_, err := h.DeliverTx(ctx, store, tx)
-		// never should error
-		if err != nil {
-			panic(err)
-		}
-	}
-}
-
-func BenchmarkCheckMultiSig(b *testing.B) {
-	sigs := []int{1, 3, 8, 20}
-	for _, cnt := range sigs {
-		label := fmt.Sprintf("%dsigs", cnt)
-		b.Run(label, func(sub *testing.B) {
-			benchmarkCheckMultiSig(sub, cnt)
-		})
-	}
-}
-
-func benchmarkCheckMultiSig(b *testing.B, cnt int) {
-	tx := makeMultiSignTx(cnt)
-	h := makeHandler()
-	store := state.NewMemKVStore()
-	for i := 1; i <= b.N; i++ {
-		ctx := util.MockContext("foo", 100)
-		_, err := h.DeliverTx(ctx, store, tx)
-		// never should error
-		if err != nil {
-			panic(err)
-		}
-	}
-}
diff --git a/x/auth/errors.go b/x/auth/errors.go
deleted file mode 100644
index 46b562cf4e..0000000000
--- a/x/auth/errors.go
+++ /dev/null
@@ -1,31 +0,0 @@
-//nolint
-package auth
-
-import (
-	"fmt"
-
-	abci "github.com/tendermint/abci/types"
-
-	"github.com/cosmos/cosmos-sdk/errors"
-)
-
-var (
-	errInvalidSignature  = fmt.Errorf("Invalid Signature")   //move auth
-	errTooManySignatures = fmt.Errorf("Too many signatures") //move auth
-
-	unauthorized = abci.CodeType_Unauthorized
-)
-
-func ErrTooManySignatures() errors.TMError {
-	return errors.WithCode(errTooManySignatures, unauthorized)
-}
-func IsTooManySignaturesErr(err error) bool {
-	return errors.IsSameError(errTooManySignatures, err)
-}
-
-func ErrInvalidSignature() errors.TMError {
-	return errors.WithCode(errInvalidSignature, unauthorized)
-}
-func IsInvalidSignatureErr(err error) bool {
-	return errors.IsSameError(errInvalidSignature, err)
-}
diff --git a/x/auth/errors_test.go b/x/auth/errors_test.go
deleted file mode 100644
index d23d3b14db..0000000000
--- a/x/auth/errors_test.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package auth
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-
-	"github.com/cosmos/cosmos-sdk/errors"
-)
-
-func TestChecks(t *testing.T) {
-	// TODO: make sure the Is and Err methods match
-	assert := assert.New(t)
-
-	cases := []struct {
-		err   error
-		check func(error) bool
-		match bool
-	}{
-		// unauthorized includes InvalidSignature, but not visa versa
-		{ErrInvalidSignature(), IsInvalidSignatureErr, true},
-		{ErrInvalidSignature(), errors.IsUnauthorizedErr, true},
-	}
-
-	for i, tc := range cases {
-		match := tc.check(tc.err)
-		assert.Equal(tc.match, match, "%d", i)
-	}
-}