fix(client/v2): *big.Int unmarshal (backport #21853) (#22174)

Co-authored-by: Julien Robert <julien@rbrt.fr>

client/v2/CHANGELOG.md

@@ -45,7 +45,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
-* [#21712](https://github.com/cosmos/cosmos-sdk/pull/21712) Marshal `type` field as proto message url in queries instead of amino name.
+* [#21936](https://github.com/cosmos/cosmos-sdk/pull/21936) Print possible enum values in error message after an invalid input was provided.
 
 ### API Breaking Changes
 
@@ -53,6 +53,16 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
+* [#21853](https://github.com/cosmos/cosmos-sdk/pull/21853) Fix `*big.Int` unmarshalling in txs.
+
+## [v2.0.0-beta.5] - 2024-09-18
+
+### Improvements
+
+* [#21712](https://github.com/cosmos/cosmos-sdk/pull/21712) Marshal `type` field as proto message url in queries instead of amino name.
+
+### Bug Fixes
+
 * [#20964](https://github.com/cosmos/cosmos-sdk/pull/20964) Fix `GetNodeHomeDirectory` helper in `client/v2/helpers` to respect the `(PREFIX)_HOME` environment variable.
 
 ## [v2.0.0-beta.3] - 2024-07-15

client/v2/autocli/flag/builder.go

@@ -26,6 +26,7 @@ const (
 	ValidatorAddressStringScalarType = "cosmos.ValidatorAddressString"
 	ConsensusAddressStringScalarType = "cosmos.ConsensusAddressString"
 	PubkeyScalarType                 = "cosmos.Pubkey"
+	DecScalarType                    = "cosmos.Dec"
 )
 
 // Builder manages options for building pflag flags for protobuf messages.
@@ -67,6 +68,7 @@ func (b *Builder) init() {
 		b.scalarFlagTypes[ValidatorAddressStringScalarType] = validatorAddressStringType{}
 		b.scalarFlagTypes[ConsensusAddressStringScalarType] = consensusAddressStringType{}
 		b.scalarFlagTypes[PubkeyScalarType] = pubkeyType{}
+		b.scalarFlagTypes[DecScalarType] = decType{}
 	}
 }
 

client/v2/autocli/flag/legacy_dec.go

@@ -0,0 +1,48 @@
+package flag
+
+import (
+	"context"
+
+	"google.golang.org/protobuf/reflect/protoreflect"
+
+	"cosmossdk.io/math"
+)
+
+type decType struct{}
+
+func (a decType) NewValue(_ *context.Context, _ *Builder) Value {
+	return &decValue{}
+}
+
+func (a decType) DefaultValue() string {
+	return "0"
+}
+
+type decValue struct {
+	value string
+}
+
+func (a decValue) Get(protoreflect.Value) (protoreflect.Value, error) {
+	return protoreflect.ValueOf(a.value), nil
+}
+
+func (a decValue) String() string {
+	return a.value
+}
+
+func (a *decValue) Set(s string) error {
+	dec, err := math.LegacyNewDecFromStr(s)
+	if err != nil {
+		return err
+	}
+
+	// we need to convert from float representation to non-float representation using default precision
+	// 0.5 -> 500000000000000000
+	a.value = dec.BigInt().String()
+
+	return nil
+}
+
+func (a decValue) Type() string {
+	return "cosmos.Dec"
+}

x/auth/tx/builder.go

@@ -112,7 +112,7 @@ var marshalOption = proto.MarshalOptions{
 func (w *builder) getTx() (*gogoTxWrapper, error) {
 	anyMsgs, err := msgsV1toAnyV2(w.msgs)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("unable to convert messages: %w", err)
 	}
 	body := &txv1beta1.TxBody{
 		Messages:                    anyMsgs,
@@ -136,12 +136,12 @@ func (w *builder) getTx() (*gogoTxWrapper, error) {
 
 	bodyBytes, err := marshalOption.Marshal(body)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("unable to marshal body: %w", err)
 	}
 
 	authInfoBytes, err := marshalOption.Marshal(authInfo)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("unable to marshal auth info: %w", err)
 	}
 
 	txRawBytes, err := marshalOption.Marshal(&txv1beta1.TxRaw{
@@ -150,12 +150,12 @@ func (w *builder) getTx() (*gogoTxWrapper, error) {
 		Signatures:    w.signatures,
 	})
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("unable to marshal tx raw: %w", err)
 	}
 
 	decodedTx, err := w.decoder.Decode(txRawBytes)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("unable to decode tx: %w", err)
 	}
 
 	return newWrapperFromDecodedTx(w.addressCodec, w.codec, decodedTx)