Merge PR cosmos#5280: Custom JSON Marshal/Unmarshal for Account Types

CHANGELOG.md

@@ -74,6 +74,7 @@ if the provided arguments are invalid.
 
 ### Client Breaking Changes
 
+* (rest) [\#5270](https://github.com/cosmos/cosmos-sdk/issues/5270) All account types now implement custom JSON serialization.
 * (rest) [\#4783](https://github.com/cosmos/cosmos-sdk/issues/4783) The balance field in the DelegationResponse type is now sdk.Coin instead of sdk.Int
 * (x/auth) [\#5006](https://github.com/cosmos/cosmos-sdk/pull/5006) The gas required to pass the `AnteHandler` has
 increased significantly due to modular `AnteHandler` support. Increase GasLimit accordingly.

x/auth/types/account.go

@@ -2,8 +2,8 @@ package types
 
 import (
 	"bytes"
+	"encoding/json"
 	"errors"
-	"fmt"
 	"time"
 
 	"github.com/tendermint/tendermint/crypto"
@@ -44,24 +44,6 @@ func NewBaseAccount(address sdk.AccAddress, coins sdk.Coins,
 	}
 }
 
-// String implements fmt.Stringer
-func (acc BaseAccount) String() string {
-	var pubkey string
-
-	if acc.PubKey != nil {
-		pubkey = sdk.MustBech32ifyAccPub(acc.PubKey)
-	}
-
-	return fmt.Sprintf(`Account:
-  Address:       %s
-  Pubkey:        %s
-  Coins:         %s
-  AccountNumber: %d
-  Sequence:      %d`,
-		acc.Address, pubkey, acc.Coins, acc.AccountNumber, acc.Sequence,
-	)
-}
-
 // ProtoBaseAccount - a prototype function for BaseAccount
 func ProtoBaseAccount() exported.Account {
 	return &BaseAccount{}
@@ -138,45 +120,96 @@ func (acc *BaseAccount) SpendableCoins(_ time.Time) sdk.Coins {
 	return acc.GetCoins()
 }
 
+// Validate checks for errors on the account fields
+func (acc BaseAccount) Validate() error {
+	if acc.PubKey != nil && acc.Address != nil &&
+		!bytes.Equal(acc.PubKey.Address().Bytes(), acc.Address.Bytes()) {
+		return errors.New("pubkey and address pair is invalid")
+	}
+
+	return nil
+}
+
+type baseAccountPretty struct {
+	Address       sdk.AccAddress `json:"address" yaml:"address"`
+	Coins         sdk.Coins      `json:"coins" yaml:"coins"`
+	PubKey        string         `json:"public_key" yaml:"public_key"`
+	AccountNumber uint64         `json:"account_number" yaml:"account_number"`
+	Sequence      uint64         `json:"sequence" yaml:"sequence"`
+}
+
+func (acc BaseAccount) String() string {
+	out, _ := acc.MarshalYAML()
+	return out.(string)
+}
+
 // MarshalYAML returns the YAML representation of an account.
 func (acc BaseAccount) MarshalYAML() (interface{}, error) {
-	var bs []byte
-	var err error
-	var pubkey string
+	alias := baseAccountPretty{
+		Address:       acc.Address,
+		Coins:         acc.Coins,
+		AccountNumber: acc.AccountNumber,
+		Sequence:      acc.Sequence,
+	}
 
 	if acc.PubKey != nil {
-		pubkey, err = sdk.Bech32ifyAccPub(acc.PubKey)
+		pks, err := sdk.Bech32ifyAccPub(acc.PubKey)
 		if err != nil {
 			return nil, err
 		}
+
+		alias.PubKey = pks
+	}
+
+	bz, err := yaml.Marshal(alias)
+	if err != nil {
+		return nil, err
 	}
 
-	bs, err = yaml.Marshal(struct {
-		Address       sdk.AccAddress
-		Coins         sdk.Coins
-		PubKey        string
-		AccountNumber uint64
-		Sequence      uint64
-	}{
+	return string(bz), err
+}
+
+// MarshalJSON returns the JSON representation of a BaseAccount.
+func (acc BaseAccount) MarshalJSON() ([]byte, error) {
+	alias := baseAccountPretty{
 		Address:       acc.Address,
 		Coins:         acc.Coins,
-		PubKey:        pubkey,
 		AccountNumber: acc.AccountNumber,
 		Sequence:      acc.Sequence,
-	})
-	if err != nil {
-		return nil, err
 	}
 
-	return string(bs), err
+	if acc.PubKey != nil {
+		pks, err := sdk.Bech32ifyAccPub(acc.PubKey)
+		if err != nil {
+			return nil, err
+		}
+
+		alias.PubKey = pks
+	}
+
+	return json.Marshal(alias)
 }
 
-// Validate checks for errors on the account fields
-func (acc BaseAccount) Validate() error {
-	if acc.PubKey != nil && acc.Address != nil &&
-		!bytes.Equal(acc.PubKey.Address().Bytes(), acc.Address.Bytes()) {
-		return errors.New("pubkey and address pair is invalid")
+// UnmarshalJSON unmarshals raw JSON bytes into a BaseAccount.
+func (acc *BaseAccount) UnmarshalJSON(bz []byte) error {
+	var alias baseAccountPretty
+	if err := json.Unmarshal(bz, &alias); err != nil {
+		return err
 	}
 
+	if alias.PubKey != "" {
+		pk, err := sdk.GetAccPubKeyBech32(alias.PubKey)
+		if err != nil {
+			return err
+		}
+
+		acc.PubKey = pk
+	}
+
+	acc.Address = alias.Address
+	acc.Coins = alias.Coins
+	acc.AccountNumber = alias.AccountNumber
+	acc.Sequence = alias.Sequence
+
 	return nil
 }

x/auth/types/account_test.go

@@ -1,6 +1,7 @@
 package types
 
 import (
+	"encoding/json"
 	"errors"
 	"testing"
 
@@ -128,3 +129,21 @@ func TestGenesisAccountValidate(t *testing.T) {
 		})
 	}
 }
+
+func TestBaseAccountJSON(t *testing.T) {
+	pubkey := secp256k1.GenPrivKey().PubKey()
+	addr := sdk.AccAddress(pubkey.Address())
+	coins := sdk.NewCoins(sdk.NewInt64Coin("test", 5))
+	baseAcc := NewBaseAccount(addr, coins, pubkey, 10, 50)
+
+	bz, err := json.Marshal(baseAcc)
+	require.NoError(t, err)
+
+	bz1, err := baseAcc.MarshalJSON()
+	require.NoError(t, err)
+	require.Equal(t, string(bz1), string(bz))
+
+	var a BaseAccount
+	require.NoError(t, json.Unmarshal(bz, &a))
+	require.Equal(t, baseAcc.String(), a.String())
+}