accounts/abi: fix bigInt topic encoding (ethereum#28764)

specialmechanisms · Jan 31, 2024 · d2dd0e1 · d2dd0e1
1 parent aee29ec
commit d2dd0e1
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Showing 2 changed files with 24 additions and 5 deletions.
diff --git a/accounts/abi/topics.go b/accounts/abi/topics.go
@@ -24,6 +24,7 @@ import (
 	"reflect"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/math"
 	"github.com/ethereum/go-ethereum/crypto"
 )
 
@@ -41,8 +42,7 @@ func MakeTopics(query ...[]interface{}) ([][]common.Hash, error) {
 			case common.Address:
 				copy(topic[common.HashLength-common.AddressLength:], rule[:])
 			case *big.Int:
-				blob := rule.Bytes()
-				copy(topic[common.HashLength-len(blob):], blob)
+				copy(topic[:], math.U256Bytes(rule))
 			case bool:
 				if rule {
 					topic[common.HashLength-1] = 1

diff --git a/accounts/abi/topics_test.go b/accounts/abi/topics_test.go
@@ -17,6 +17,7 @@
 package abi
 
 import (
+	"math"
 	"math/big"
 	"reflect"
 	"testing"
@@ -55,9 +56,27 @@ func TestMakeTopics(t *testing.T) {
 			false,
 		},
 		{
-			"support *big.Int types in topics",
-			args{[][]interface{}{{big.NewInt(1).Lsh(big.NewInt(2), 254)}}},
-			[][]common.Hash{{common.Hash{128}}},
+			"support positive *big.Int types in topics",
+			args{[][]interface{}{
+				{big.NewInt(1)},
+				{big.NewInt(1).Lsh(big.NewInt(2), 254)},
+			}},
+			[][]common.Hash{
+				{common.HexToHash("0000000000000000000000000000000000000000000000000000000000000001")},
+				{common.Hash{128}},
+			},
+			false,
+		},
+		{
+			"support negative *big.Int types in topics",
+			args{[][]interface{}{
+				{big.NewInt(-1)},
+				{big.NewInt(math.MinInt64)},
+			}},
+			[][]common.Hash{
+				{common.MaxHash},
+				{common.HexToHash("ffffffffffffffffffffffffffffffffffffffffffffffff8000000000000000")},
+			},
 			false,
 		},
 		{