Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

fix: decrement types.Dec max length to keep decimal bits in DecimalPrecisionBits (backport #11772) #11805

Merged
merged 3 commits into from
Apr 27, 2022
Merged

fix: decrement types.Dec max length to keep decimal bits in DecimalPrecisionBits (backport #11772) #11805

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
9b05b53
fix: decrement types.Dec max length to keep decimal bits in DecimalPr…
elias-orijtech Apr 27, 2022
b574fd5
updates
alexanderbez Apr 27, 2022
51d783d
updates
alexanderbez Apr 27, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 4 additions & 0 deletions CHANGELOG.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,10 @@ Ref: https://keepachangelog.com/en/1.0.0/

## [Unreleased]

### Bug Fixes

* [\#11772](https://github.com/cosmos/cosmos-sdk/pull/11772) Limit types.Dec length to avoid overflow.

## [v0.45.4](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.45.4) - 2022-04-25

### Bug Fixes
Expand Down
1 change: 1 addition & 0 deletions types/coin_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -751,6 +751,7 @@ func (s *coinTestSuite) TestParseCoins() {
{"10atom10", true, sdk.Coins{{"atom10", sdk.NewInt(10)}}},
{"200transfer/channelToA/uatom", true, sdk.Coins{{"transfer/channelToA/uatom", sdk.NewInt(200)}}},
{"50ibc/7F1D3FCF4AE79E1554D670D1AD949A9BA4E4A3C76C63093E17E446A46061A7A2", true, sdk.Coins{{"ibc/7F1D3FCF4AE79E1554D670D1AD949A9BA4E4A3C76C63093E17E446A46061A7A2", sdk.NewInt(50)}}},
{"120000000000000000000000000000000000000000000000000000000000000000000000000000btc", false, nil},
}

for tcIndex, tc := range cases {
Expand Down
11 changes: 8 additions & 3 deletions types/decimal.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -22,11 +22,16 @@ const (
// number of decimal places
Precision = 18

// bytes required to represent the above precision
// Ceiling[Log2[999 999 999 999 999 999]]
// bits required to represent the above precision
// Ceiling[Log2[10^Precision - 1]]
DecimalPrecisionBits = 60

maxDecBitLen = maxBitLen + DecimalPrecisionBits
// decimalTruncateBits is the minimum number of bits removed
// by a truncate operation. It is equal to
// Floor[Log2[10^Precision - 1]].
decimalTruncateBits = DecimalPrecisionBits - 1

maxDecBitLen = maxBitLen + decimalTruncateBits

// max number of iterations in ApproxRoot function
maxApproxRootIterations = 100
Expand Down
35 changes: 23 additions & 12 deletions types/decimal_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ import (
"encoding/json"
"fmt"
"math/big"
"strings"
"testing"

"github.com/stretchr/testify/suite"
Expand Down Expand Up @@ -33,10 +34,10 @@ func (s *decimalTestSuite) TestNewDecFromStr() {
largeBigInt, ok := new(big.Int).SetString("3144605511029693144278234343371835", 10)
s.Require().True(ok)

largerBigInt, ok := new(big.Int).SetString("88888888888888888888888888888888888888888888888888888888888888888888844444440", 10)
largerBigInt, ok := new(big.Int).SetString("8888888888888888888888888888888888888888888888888888888888888888888844444440", 10)
s.Require().True(ok)

largestBigInt, ok := new(big.Int).SetString("133499189745056880149688856635597007162669032647290798121690100488888732861290034376435130433535", 10)
largestBigInt, ok := new(big.Int).SetString("33499189745056880149688856635597007162669032647290798121690100488888732861290034376435130433535", 10)
s.Require().True(ok)

tests := []struct {
Expand All @@ -63,8 +64,8 @@ func (s *decimalTestSuite) TestNewDecFromStr() {
{"foobar", true, sdk.Dec{}},
{"0.foobar", true, sdk.Dec{}},
{"0.foobar.", true, sdk.Dec{}},
{"88888888888888888888888888888888888888888888888888888888888888888888844444440", false, sdk.NewDecFromBigInt(largerBigInt)},
{"133499189745056880149688856635597007162669032647290798121690100488888732861290.034376435130433535", false, sdk.NewDecFromBigIntWithPrec(largestBigInt, 18)},
{"8888888888888888888888888888888888888888888888888888888888888888888844444440", false, sdk.NewDecFromBigInt(largerBigInt)},
{"33499189745056880149688856635597007162669032647290798121690100488888732861290.034376435130433535", false, sdk.NewDecFromBigIntWithPrec(largestBigInt, 18)},
{"133499189745056880149688856635597007162669032647290798121690100488888732861291", true, sdk.Dec{}},
}

Expand Down Expand Up @@ -449,10 +450,14 @@ func (s *decimalTestSuite) TestDecSortableBytes() {
}

func (s *decimalTestSuite) TestDecEncoding() {
largestBigInt, ok := new(big.Int).SetString("133499189745056880149688856635597007162669032647290798121690100488888732861290034376435130433535", 10)
largestBigInt, ok := new(big.Int).SetString("33499189745056880149688856635597007162669032647290798121690100488888732861290034376435130433535", 10)
s.Require().True(ok)

smallestBigInt, ok := new(big.Int).SetString("-133499189745056880149688856635597007162669032647290798121690100488888732861290034376435130433535", 10)
smallestBigInt, ok := new(big.Int).SetString("-33499189745056880149688856635597007162669032647290798121690100488888732861290034376435130433535", 10)
s.Require().True(ok)

const maxDecBitLen = 315
maxInt, ok := new(big.Int).SetString(strings.Repeat("1", maxDecBitLen), 2)
s.Require().True(ok)

testCases := []struct {
Expand Down Expand Up @@ -492,15 +497,21 @@ func (s *decimalTestSuite) TestDecEncoding() {
},
{
sdk.NewDecFromBigIntWithPrec(largestBigInt, 18),
"313333343939313839373435303536383830313439363838383536363335353937303037313632363639303332363437323930373938313231363930313030343838383838373332383631323930303334333736343335313330343333353335",
"\"133499189745056880149688856635597007162669032647290798121690100488888732861290.034376435130433535\"",
"\"133499189745056880149688856635597007162669032647290798121690100488888732861290.034376435130433535\"\n",
"3333343939313839373435303536383830313439363838383536363335353937303037313632363639303332363437323930373938313231363930313030343838383838373332383631323930303334333736343335313330343333353335",
"\"33499189745056880149688856635597007162669032647290798121690100488888732861290.034376435130433535\"",
"\"33499189745056880149688856635597007162669032647290798121690100488888732861290.034376435130433535\"\n",
},
{
sdk.NewDecFromBigIntWithPrec(smallestBigInt, 18),
"2D313333343939313839373435303536383830313439363838383536363335353937303037313632363639303332363437323930373938313231363930313030343838383838373332383631323930303334333736343335313330343333353335",
"\"-133499189745056880149688856635597007162669032647290798121690100488888732861290.034376435130433535\"",
"\"-133499189745056880149688856635597007162669032647290798121690100488888732861290.034376435130433535\"\n",
"2D3333343939313839373435303536383830313439363838383536363335353937303037313632363639303332363437323930373938313231363930313030343838383838373332383631323930303334333736343335313330343333353335",
"\"-33499189745056880149688856635597007162669032647290798121690100488888732861290.034376435130433535\"",
"\"-33499189745056880149688856635597007162669032647290798121690100488888732861290.034376435130433535\"\n",
},
{
sdk.NewDecFromBigIntWithPrec(maxInt, 18),
"3636373439353934383732353238343430303734383434343238333137373938353033353831333334353136333233363435333939303630383435303530323434343434333636343330363435303137313838323137353635323136373637",
"\"66749594872528440074844428317798503581334516323645399060845050244444366430645.017188217565216767\"",
"\"66749594872528440074844428317798503581334516323645399060845050244444366430645.017188217565216767\"\n",
},
}

Expand Down