types: Dec.MarshalJSON now marshals as a normal decimal string
Closes #2475
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@ -72,6 +72,8 @@ BREAKING CHANGES
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* [x/stake] \#2412 Added an unbonding validator queue to EndBlock to automatically update validator.Status when finished Unbonding
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* [x/stake] \#2500 Block conflicting redelegations until we add an index
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* [x/params] Global Paramstore refactored
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* [types] \#2506 sdk.Dec MarshalJSON now marshals as a normal Decimal, with 10 digits of decimal precision
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* Tendermint
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* Update tendermint version from v0.23.0 to v0.25.0, notable changes
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@ -407,17 +407,36 @@ func (d *Dec) UnmarshalAmino(text string) (err error) {
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return nil
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}
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// MarshalJSON defines custom encoding scheme
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// MarshalJSON marshals the decimal
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func (d Dec) MarshalJSON() ([]byte, error) {
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if d.Int == nil {
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return nilJSON, nil
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}
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bz, err := d.Int.MarshalText()
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if err != nil {
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return nil, err
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}
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return json.Marshal(string(bz))
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var bzWDec []byte
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// TODO: Remove trailing zeros
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// case 1, pure decimal
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if len(bz) <= 10 {
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bzWDec = make([]byte, 12)
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// 0. prefix
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bzWDec[0] = byte('0')
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bzWDec[1] = byte('.')
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// set relevant digits to 0
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for i := 0; i < 10-len(bz); i++ {
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bzWDec[i+2] = byte('0')
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}
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// set last few digits
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copy(bzWDec[2+(10-len(bz)):], bz)
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} else {
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bzWDec = make([]byte, len(bz)+1)
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copy(bzWDec, bz[:len(bz)-10])
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bzWDec[len(bz)-10] = byte('.')
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copy(bzWDec[len(bz)-9:], bz[len(bz)-10:])
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}
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return json.Marshal(string(bzWDec))
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}
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// UnmarshalJSON defines custom decoding scheme
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@ -431,7 +450,13 @@ func (d *Dec) UnmarshalJSON(bz []byte) error {
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if err != nil {
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return err
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}
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return d.Int.UnmarshalText([]byte(text))
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// TODO: Reuse dec allocation
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newDec, err := NewDecFromStr(text)
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if err != nil {
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return err
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}
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d.Int = newDec.Int
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return nil
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}
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//___________________________________________________________________________________
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@ -4,6 +4,8 @@ import (
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"math/big"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/cosmos/cosmos-sdk/codec"
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"github.com/stretchr/testify/require"
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)
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@ -248,6 +250,44 @@ func TestToLeftPadded(t *testing.T) {
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var cdc = codec.New()
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func TestDecMarshalJSON(t *testing.T) {
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decimal := func(i int64) Dec {
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d := NewDec(0)
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d.Int = new(big.Int).SetInt64(i)
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return d
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}
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tests := []struct {
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name string
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d Dec
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want string
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wantErr bool // if wantErr = false, will also attempt unmarshaling
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}{
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{"zero", decimal(0), "\"0.0000000000\"", false},
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{"one", decimal(1), "\"0.0000000001\"", false},
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{"ten", decimal(10), "\"0.0000000010\"", false},
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{"12340", decimal(12340), "\"0.0000012340\"", false},
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{"zeroInt", NewDec(0), "\"0.0000000000\"", false},
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{"oneInt", NewDec(1), "\"1.0000000000\"", false},
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{"tenInt", NewDec(10), "\"10.0000000000\"", false},
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{"12340Int", NewDec(12340), "\"12340.0000000000\"", false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got, err := tt.d.MarshalJSON()
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if (err != nil) != tt.wantErr {
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t.Errorf("Dec.MarshalJSON() error = %v, wantErr %v", err, tt.wantErr)
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return
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}
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if !tt.wantErr {
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assert.Equal(t, tt.want, string(got), "incorrect marshalled value")
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unmarshalledDec := NewDec(0)
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unmarshalledDec.UnmarshalJSON(got)
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assert.Equal(t, tt.d, unmarshalledDec, "incorrect unmarshalled value")
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}
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})
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}
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}
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func TestZeroDeserializationJSON(t *testing.T) {
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d := Dec{new(big.Int)}
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err := cdc.UnmarshalJSON([]byte(`"0"`), &d)
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