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 int64 overflow error for height comparison #7944

Merged
merged 3 commits into from
Nov 17, 2020
Merged

Fix int64 overflow error for height comparison #7944

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
1c5604d
fix int64 overflow for height comparison
bluele Nov 16, 2020
c52a078
apply suggestions from review
bluele Nov 17, 2020
cf37de4
Merge branch 'master' into fix-overflow-height-comparison
fedekunze Nov 17, 2020
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
16 changes: 7 additions & 9 deletions x/ibc/core/02-client/types/height.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ package types

import (
"fmt"
"math/big"
"regexp"
"strconv"
"strings"
Expand Down Expand Up @@ -54,18 +55,15 @@ func (h Height) Compare(other exported.Height) int64 {
if !ok {
panic(fmt.Sprintf("cannot compare against invalid height type: %T. expected height type: %T", other, h))
}
var cmp int64
var a, b big.Int
if h.VersionNumber != height.VersionNumber {
cmp = int64(h.VersionNumber) - int64(height.VersionNumber)
a.SetUint64(h.VersionNumber)
b.SetUint64(height.VersionNumber)
} else {
cmp = int64(h.VersionHeight) - int64(height.VersionHeight)
a.SetUint64(h.VersionHeight)
b.SetUint64(height.VersionHeight)
}
if cmp < 0 {
return -1
} else if cmp > 0 {
return 1
}
return 0
return int64(a.Cmp(&b))
}

// LT Helper comparison function returns true if h < other
Expand Down
3 changes: 3 additions & 0 deletions x/ibc/core/02-client/types/height_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
package types_test

import (
"math"
"testing"

"github.com/stretchr/testify/require"
Expand All @@ -23,6 +24,8 @@ func TestCompareHeights(t *testing.T) {
{"version number 1 is greater", types.NewHeight(7, 5), types.NewHeight(4, 5), 1},
{"version height 1 is lesser", types.NewHeight(3, 4), types.NewHeight(3, 9), -1},
{"version height 1 is greater", types.NewHeight(3, 8), types.NewHeight(3, 3), 1},
{"version number is MaxUint64", types.NewHeight(math.MaxUint64, 1), types.NewHeight(0, 1), 1},
{"version height is MaxUint64", types.NewHeight(1, math.MaxUint64), types.NewHeight(1, 0), 1},
{"height is equal", types.NewHeight(4, 4), types.NewHeight(4, 4), 0},
}

Expand Down