Merge pull request #1379: Account constructor in AccountMaper

fix

fix democoin

fix tests

pass lint

last fix

apply requests

fix build failing

fix docs

cmd/gaia/app/app.go

@@ -75,7 +75,7 @@ func NewGaiaApp(logger log.Logger, db dbm.DB) *GaiaApp {
 	app.accountMapper = auth.NewAccountMapper(
 		app.cdc,
 		app.keyAccount,        // target store
-		&auth.BaseAccount{}, // prototype
+		auth.ProtoBaseAccount, // prototype
 	)
 
 	// add handlers

cmd/gaia/cmd/gaiadebug/hack.go

@@ -158,7 +158,7 @@ func NewGaiaApp(logger log.Logger, db dbm.DB) *GaiaApp {
 	app.accountMapper = auth.NewAccountMapper(
 		app.cdc,
 		app.keyAccount,        // target store
-		&auth.BaseAccount{}, // prototype
+		auth.ProtoBaseAccount, // prototype
 	)
 
 	// add handlers

docs/core/app3.md

@@ -105,7 +105,7 @@ Creating an AccountMapper is easy - we just need to specify a codec, a
 capability key, and a prototype of the object being encoded 
 
 ```go
-accountMapper := auth.NewAccountMapper(cdc, keyAccount, &auth.BaseAccount{})
+accountMapper := auth.NewAccountMapper(cdc, keyAccount, auth.ProtoBaseAccount)
 ```
 
 Then we can get, modify, and set accounts. For instance, we could double the
@@ -335,7 +335,7 @@ func NewApp3(logger log.Logger, db dbm.DB) *bapp.BaseApp {
 	keyFees := sdk.NewKVStoreKey("fee")  // TODO
 
 	// Set various mappers/keepers to interact easily with underlying stores
-	accountMapper := auth.NewAccountMapper(cdc, keyAccount, &auth.BaseAccount{})
+	accountMapper := auth.NewAccountMapper(cdc, keyAccount, auth.ProtoBaseAccount)
 	coinKeeper := bank.NewKeeper(accountMapper)
 	feeKeeper := auth.NewFeeCollectionKeeper(cdc, keyFees)
 

docs/core/examples/app3.go

@@ -28,7 +28,7 @@ func NewApp3(logger log.Logger, db dbm.DB) *bapp.BaseApp {
 	keyFees := sdk.NewKVStoreKey("fee") // TODO
 
 	// Set various mappers/keepers to interact easily with underlying stores
-	accountMapper := auth.NewAccountMapper(cdc, keyAccount, &auth.BaseAccount{})
+	accountMapper := auth.NewAccountMapper(cdc, keyAccount, auth.ProtoBaseAccount)
 	coinKeeper := bank.NewKeeper(accountMapper)
 	feeKeeper := auth.NewFeeCollectionKeeper(cdc, keyFees)
 

docs/core/examples/app4.go

@@ -28,7 +28,7 @@ func NewApp4(logger log.Logger, db dbm.DB) *bapp.BaseApp {
 	keyAccount := sdk.NewKVStoreKey("acc")
 
 	// Set various mappers/keepers to interact easily with underlying stores
-	accountMapper := auth.NewAccountMapper(cdc, keyAccount, &auth.BaseAccount{})
+	accountMapper := auth.NewAccountMapper(cdc, keyAccount, auth.ProtoBaseAccount)
 	coinKeeper := bank.NewKeeper(accountMapper)
 
 	// TODO

examples/basecoin/app/app.go

@@ -63,7 +63,7 @@ func NewBasecoinApp(logger log.Logger, db dbm.DB) *BasecoinApp {
 	app.accountMapper = auth.NewAccountMapper(
 		cdc,
 		app.keyAccount,        // target store
-		&types.AppAccount{}, // prototype
+		auth.ProtoBaseAccount, // prototype
 	)
 	app.coinKeeper = bank.NewKeeper(app.accountMapper)
 	app.ibcMapper = ibc.NewMapper(app.cdc, app.keyIBC, app.RegisterCodespace(ibc.DefaultCodespace))

examples/democoin/app/app.go

@@ -71,7 +71,7 @@ func NewDemocoinApp(logger log.Logger, db dbm.DB) *DemocoinApp {
 	app.accountMapper = auth.NewAccountMapper(
 		cdc,
 		app.capKeyAccountStore, // target store
-		&types.AppAccount{},    // prototype
+		types.ProtoAppAccount,  // prototype
 	)
 
 	// Add handlers.

examples/democoin/types/account.go

@@ -21,6 +21,11 @@ type AppAccount struct {
 	Name string `json:"name"`
 }
 
+// Constructor for AppAccount
+func ProtoAppAccount() auth.Account {
+	return &AppAccount{}
+}
+
 // nolint
 func (acc AppAccount) GetName() string      { return acc.Name }
 func (acc *AppAccount) SetName(name string) { acc.Name = name }

examples/democoin/x/cool/keeper_test.go

@@ -29,7 +29,7 @@ func TestCoolKeeper(t *testing.T) {
 	cdc := wire.NewCodec()
 	auth.RegisterBaseAccount(cdc)
 
-	am := auth.NewAccountMapper(cdc, capKey, &auth.BaseAccount{})
+	am := auth.NewAccountMapper(cdc, capKey, auth.ProtoBaseAccount)
 	ctx := sdk.NewContext(ms, abci.Header{}, false, nil)
 	ck := bank.NewKeeper(am)
 	keeper := NewKeeper(capKey, ck, DefaultCodespace)

examples/democoin/x/pow/handler_test.go

@@ -19,7 +19,7 @@ func TestPowHandler(t *testing.T) {
 	cdc := wire.NewCodec()
 	auth.RegisterBaseAccount(cdc)
 
-	am := auth.NewAccountMapper(cdc, capKey, &auth.BaseAccount{})
+	am := auth.NewAccountMapper(cdc, capKey, auth.ProtoBaseAccount)
 	ctx := sdk.NewContext(ms, abci.Header{}, false, log.NewNopLogger())
 	config := NewConfig("pow", int64(1))
 	ck := bank.NewKeeper(am)

examples/democoin/x/pow/keeper_test.go

@@ -32,7 +32,7 @@ func TestPowKeeperGetSet(t *testing.T) {
 	cdc := wire.NewCodec()
 	auth.RegisterBaseAccount(cdc)
 
-	am := auth.NewAccountMapper(cdc, capKey, &auth.BaseAccount{})
+	am := auth.NewAccountMapper(cdc, capKey, auth.ProtoBaseAccount)
 	ctx := sdk.NewContext(ms, abci.Header{}, false, log.NewNopLogger())
 	config := NewConfig("pow", int64(1))
 	ck := bank.NewKeeper(am)

examples/democoin/x/simplestake/keeper_test.go

@@ -35,7 +35,7 @@ func TestKeeperGetSet(t *testing.T) {
 	cdc := wire.NewCodec()
 	auth.RegisterBaseAccount(cdc)
 
-	accountMapper := auth.NewAccountMapper(cdc, authKey, &auth.BaseAccount{})
+	accountMapper := auth.NewAccountMapper(cdc, authKey, auth.ProtoBaseAccount)
 	stakeKeeper := NewKeeper(capKey, bank.NewKeeper(accountMapper), DefaultCodespace)
 	ctx := sdk.NewContext(ms, abci.Header{}, false, log.NewNopLogger())
 	addr := sdk.AccAddress([]byte("some-address"))
@@ -65,7 +65,7 @@ func TestBonding(t *testing.T) {
 
 	ctx := sdk.NewContext(ms, abci.Header{}, false, log.NewNopLogger())
 
-	accountMapper := auth.NewAccountMapper(cdc, authKey, &auth.BaseAccount{})
+	accountMapper := auth.NewAccountMapper(cdc, authKey, auth.ProtoBaseAccount)
 	coinKeeper := bank.NewKeeper(accountMapper)
 	stakeKeeper := NewKeeper(capKey, coinKeeper, DefaultCodespace)
 	addr := sdk.AccAddress([]byte("some-address"))

x/auth/account.go

@@ -46,6 +46,11 @@ type BaseAccount struct {
 	Sequence      int64          `json:"sequence"`
 }
 
+// Prototype function for BaseAccount
+func ProtoBaseAccount() Account {
+	return &BaseAccount{}
+}
+
 func NewBaseAccountWithAddress(addr sdk.AccAddress) BaseAccount {
 	return BaseAccount{
 		Address: addr,

x/auth/ante_test.go

@@ -112,7 +112,7 @@ func TestAnteHandlerSigErrors(t *testing.T) {
 	ms, capKey, capKey2 := setupMultiStore()
 	cdc := wire.NewCodec()
 	RegisterBaseAccount(cdc)
-	mapper := NewAccountMapper(cdc, capKey, &BaseAccount{})
+	mapper := NewAccountMapper(cdc, capKey, ProtoBaseAccount)
 	feeCollector := NewFeeCollectionKeeper(cdc, capKey2)
 	anteHandler := NewAnteHandler(mapper, feeCollector)
 	ctx := sdk.NewContext(ms, abci.Header{ChainID: "mychainid"}, false, log.NewNopLogger())
@@ -165,7 +165,7 @@ func TestAnteHandlerAccountNumbers(t *testing.T) {
 	ms, capKey, capKey2 := setupMultiStore()
 	cdc := wire.NewCodec()
 	RegisterBaseAccount(cdc)
-	mapper := NewAccountMapper(cdc, capKey, &BaseAccount{})
+	mapper := NewAccountMapper(cdc, capKey, ProtoBaseAccount)
 	feeCollector := NewFeeCollectionKeeper(cdc, capKey2)
 	anteHandler := NewAnteHandler(mapper, feeCollector)
 	ctx := sdk.NewContext(ms, abci.Header{ChainID: "mychainid"}, false, log.NewNopLogger())
@@ -224,7 +224,7 @@ func TestAnteHandlerSequences(t *testing.T) {
 	ms, capKey, capKey2 := setupMultiStore()
 	cdc := wire.NewCodec()
 	RegisterBaseAccount(cdc)
-	mapper := NewAccountMapper(cdc, capKey, &BaseAccount{})
+	mapper := NewAccountMapper(cdc, capKey, ProtoBaseAccount)
 	feeCollector := NewFeeCollectionKeeper(cdc, capKey2)
 	anteHandler := NewAnteHandler(mapper, feeCollector)
 	ctx := sdk.NewContext(ms, abci.Header{ChainID: "mychainid"}, false, log.NewNopLogger())
@@ -302,7 +302,7 @@ func TestAnteHandlerFees(t *testing.T) {
 	ms, capKey, capKey2 := setupMultiStore()
 	cdc := wire.NewCodec()
 	RegisterBaseAccount(cdc)
-	mapper := NewAccountMapper(cdc, capKey, &BaseAccount{})
+	mapper := NewAccountMapper(cdc, capKey, ProtoBaseAccount)
 	feeCollector := NewFeeCollectionKeeper(cdc, capKey2)
 	anteHandler := NewAnteHandler(mapper, feeCollector)
 	ctx := sdk.NewContext(ms, abci.Header{ChainID: "mychainid"}, false, log.NewNopLogger())
@@ -344,7 +344,7 @@ func TestAnteHandlerMemoGas(t *testing.T) {
 	ms, capKey, capKey2 := setupMultiStore()
 	cdc := wire.NewCodec()
 	RegisterBaseAccount(cdc)
-	mapper := NewAccountMapper(cdc, capKey, &BaseAccount{})
+	mapper := NewAccountMapper(cdc, capKey, ProtoBaseAccount)
 	feeCollector := NewFeeCollectionKeeper(cdc, capKey2)
 	anteHandler := NewAnteHandler(mapper, feeCollector)
 	ctx := sdk.NewContext(ms, abci.Header{ChainID: "mychainid"}, false, log.NewNopLogger())
@@ -387,7 +387,7 @@ func TestAnteHandlerMultiSigner(t *testing.T) {
 	ms, capKey, capKey2 := setupMultiStore()
 	cdc := wire.NewCodec()
 	RegisterBaseAccount(cdc)
-	mapper := NewAccountMapper(cdc, capKey, &BaseAccount{})
+	mapper := NewAccountMapper(cdc, capKey, ProtoBaseAccount)
 	feeCollector := NewFeeCollectionKeeper(cdc, capKey2)
 	anteHandler := NewAnteHandler(mapper, feeCollector)
 	ctx := sdk.NewContext(ms, abci.Header{ChainID: "mychainid"}, false, log.NewNopLogger())
@@ -438,7 +438,7 @@ func TestAnteHandlerBadSignBytes(t *testing.T) {
 	ms, capKey, capKey2 := setupMultiStore()
 	cdc := wire.NewCodec()
 	RegisterBaseAccount(cdc)
-	mapper := NewAccountMapper(cdc, capKey, &BaseAccount{})
+	mapper := NewAccountMapper(cdc, capKey, ProtoBaseAccount)
 	feeCollector := NewFeeCollectionKeeper(cdc, capKey2)
 	anteHandler := NewAnteHandler(mapper, feeCollector)
 	ctx := sdk.NewContext(ms, abci.Header{ChainID: "mychainid"}, false, log.NewNopLogger())
@@ -519,7 +519,7 @@ func TestAnteHandlerSetPubKey(t *testing.T) {
 	ms, capKey, capKey2 := setupMultiStore()
 	cdc := wire.NewCodec()
 	RegisterBaseAccount(cdc)
-	mapper := NewAccountMapper(cdc, capKey, &BaseAccount{})
+	mapper := NewAccountMapper(cdc, capKey, ProtoBaseAccount)
 	feeCollector := NewFeeCollectionKeeper(cdc, capKey2)
 	anteHandler := NewAnteHandler(mapper, feeCollector)
 	ctx := sdk.NewContext(ms, abci.Header{ChainID: "mychainid"}, false, log.NewNopLogger())

x/auth/mapper.go

@@ -1,9 +1,6 @@
 package auth
 
 import (
-	"fmt"
-	"reflect"
-
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	wire "github.com/cosmos/cosmos-sdk/wire"
 	"github.com/tendermint/tendermint/crypto"
@@ -18,8 +15,8 @@ type AccountMapper struct {
 	// The (unexposed) key used to access the store from the Context.
 	key sdk.StoreKey
 
-	// The prototypical Account concrete type.
-	proto Account
+	// The prototypical Account constructor.
+	proto func() Account
 
 	// The wire codec for binary encoding/decoding of accounts.
 	cdc *wire.Codec
@@ -28,7 +25,7 @@ type AccountMapper struct {
 // NewAccountMapper returns a new sdk.AccountMapper that
 // uses go-amino to (binary) encode and decode concrete sdk.Accounts.
 // nolint
-func NewAccountMapper(cdc *wire.Codec, key sdk.StoreKey, proto Account) AccountMapper {
+func NewAccountMapper(cdc *wire.Codec, key sdk.StoreKey, proto func() Account) AccountMapper {
 	return AccountMapper{
 		key:   key,
 		proto: proto,
@@ -38,7 +35,7 @@ func NewAccountMapper(cdc *wire.Codec, key sdk.StoreKey, proto Account) AccountM
 
 // Implaements sdk.AccountMapper.
 func (am AccountMapper) NewAccountWithAddress(ctx sdk.Context, addr sdk.AccAddress) Account {
-	acc := am.clonePrototype()
+	acc := am.proto()
 	err := acc.SetAddress(addr)
 	if err != nil {
 		// Handle w/ #870
@@ -158,30 +155,6 @@ func (am AccountMapper) GetNextAccountNumber(ctx sdk.Context) int64 {
 //----------------------------------------
 // misc.
 
-// Creates a new struct (or pointer to struct) from am.proto.
-func (am AccountMapper) clonePrototype() Account {
-	protoRt := reflect.TypeOf(am.proto)
-	if protoRt.Kind() == reflect.Ptr {
-		protoCrt := protoRt.Elem()
-		if protoCrt.Kind() != reflect.Struct {
-			panic("accountMapper requires a struct proto sdk.Account, or a pointer to one")
-		}
-		protoRv := reflect.New(protoCrt)
-		clone, ok := protoRv.Interface().(Account)
-		if !ok {
-			panic(fmt.Sprintf("accountMapper requires a proto sdk.Account, but %v doesn't implement sdk.Account", protoRt))
-		}
-		return clone
-	}
-
-	protoRv := reflect.New(protoRt).Elem()
-	clone, ok := protoRv.Interface().(Account)
-	if !ok {
-		panic(fmt.Sprintf("accountMapper requires a proto sdk.Account, but %v doesn't implement sdk.Account", protoRt))
-	}
-	return clone
-}
-
 func (am AccountMapper) encodeAccount(acc Account) []byte {
 	bz, err := am.cdc.MarshalBinaryBare(acc)
 	if err != nil {

x/auth/mapper_test.go

@@ -32,7 +32,7 @@ func TestAccountMapperGetSet(t *testing.T) {
 
 	// make context and mapper
 	ctx := sdk.NewContext(ms, abci.Header{}, false, log.NewNopLogger())
-	mapper := NewAccountMapper(cdc, capKey, &BaseAccount{})
+	mapper := NewAccountMapper(cdc, capKey, ProtoBaseAccount)
 
 	addr := sdk.AccAddress([]byte("some-address"))
 

x/bank/keeper_test.go

@@ -33,7 +33,7 @@ func TestKeeper(t *testing.T) {
 	auth.RegisterBaseAccount(cdc)
 
 	ctx := sdk.NewContext(ms, abci.Header{}, false, log.NewNopLogger())
-	accountMapper := auth.NewAccountMapper(cdc, authKey, &auth.BaseAccount{})
+	accountMapper := auth.NewAccountMapper(cdc, authKey, auth.ProtoBaseAccount)
 	coinKeeper := NewKeeper(accountMapper)
 
 	addr := sdk.AccAddress([]byte("addr1"))
@@ -118,7 +118,7 @@ func TestSendKeeper(t *testing.T) {
 	auth.RegisterBaseAccount(cdc)
 
 	ctx := sdk.NewContext(ms, abci.Header{}, false, log.NewNopLogger())
-	accountMapper := auth.NewAccountMapper(cdc, authKey, &auth.BaseAccount{})
+	accountMapper := auth.NewAccountMapper(cdc, authKey, auth.ProtoBaseAccount)
 	coinKeeper := NewKeeper(accountMapper)
 	sendKeeper := NewSendKeeper(accountMapper)
 
@@ -187,7 +187,7 @@ func TestViewKeeper(t *testing.T) {
 	auth.RegisterBaseAccount(cdc)
 
 	ctx := sdk.NewContext(ms, abci.Header{}, false, log.NewNopLogger())
-	accountMapper := auth.NewAccountMapper(cdc, authKey, &auth.BaseAccount{})
+	accountMapper := auth.NewAccountMapper(cdc, authKey, auth.ProtoBaseAccount)
 	coinKeeper := NewKeeper(accountMapper)
 	viewKeeper := NewViewKeeper(accountMapper)
 

x/ibc/ibc_test.go

@@ -64,7 +64,7 @@ func TestIBC(t *testing.T) {
 	key := sdk.NewKVStoreKey("ibc")
 	ctx := defaultContext(key)
 
-	am := auth.NewAccountMapper(cdc, key, &auth.BaseAccount{})
+	am := auth.NewAccountMapper(cdc, key, auth.ProtoBaseAccount)
 	ck := bank.NewKeeper(am)
 
 	src := newAddress()

x/mock/app.go

@@ -58,7 +58,7 @@ func NewApp() *App {
 	app.AccountMapper = auth.NewAccountMapper(
 		app.Cdc,
 		app.KeyAccount,
-		&auth.BaseAccount{},
+		auth.ProtoBaseAccount,
 	)
 
 	// Initialize the app. The chainers and blockers can be overwritten before

x/slashing/test_common.go

@@ -59,7 +59,7 @@ func createTestInput(t *testing.T) (sdk.Context, bank.Keeper, stake.Keeper, Keep
 	require.Nil(t, err)
 	ctx := sdk.NewContext(ms, abci.Header{}, false, log.NewTMLogger(os.Stdout))
 	cdc := createTestCodec()
-	accountMapper := auth.NewAccountMapper(cdc, keyAcc, &auth.BaseAccount{})
+	accountMapper := auth.NewAccountMapper(cdc, keyAcc, auth.ProtoBaseAccount)
 	ck := bank.NewKeeper(accountMapper)
 	sk := stake.NewKeeper(cdc, keyStake, ck, stake.DefaultCodespace)
 	genesis := stake.DefaultGenesisState()

x/stake/keeper/test_common.go

@@ -103,7 +103,7 @@ func CreateTestInput(t *testing.T, isCheckTx bool, initCoins int64) (sdk.Context
 	accountMapper := auth.NewAccountMapper(
 		cdc,                   // amino codec
 		keyAcc,                // target store
-		&auth.BaseAccount{}, // prototype
+		auth.ProtoBaseAccount, // prototype
 	)
 	ck := bank.NewKeeper(accountMapper)
 	keeper := NewKeeper(cdc, keyStake, ck, types.DefaultCodespace)