accounts/abi/bind: check event signature before parsing (ethereum#23230)

* accounts/abi/bind: check event signature before parsing

* remove redundant break line

Author: yihau

accounts/abi/bind/base.go

@@ -431,6 +431,9 @@ func (c *BoundContract) WatchLogs(opts *WatchOpts, name string, query ...[]inter
 
 // UnpackLog unpacks a retrieved log into the provided output structure.
 func (c *BoundContract) UnpackLog(out interface{}, event string, log types.Log) error {
+	if log.Topics[0] != c.abi.Events[event].ID {
+		return fmt.Errorf("event signature mismatch")
+	}
 	if len(log.Data) > 0 {
 		if err := c.abi.UnpackIntoInterface(out, event, log.Data); err != nil {
 			return err
@@ -447,6 +450,9 @@ func (c *BoundContract) UnpackLog(out interface{}, event string, log types.Log)
 
 // UnpackLogIntoMap unpacks a retrieved log into the provided map.
 func (c *BoundContract) UnpackLogIntoMap(out map[string]interface{}, event string, log types.Log) error {
+	if log.Topics[0] != c.abi.Events[event].ID {
+		return fmt.Errorf("event signature mismatch")
+	}
 	if len(log.Data) > 0 {
 		if err := c.abi.UnpackIntoMap(out, event, log.Data); err != nil {
 			return err

accounts/abi/bind/base_test.go

@@ -110,7 +110,7 @@ const hexData = "0x000000000000000000000000376c47978271565f56deb45495afa69e59c16
 func TestUnpackIndexedStringTyLogIntoMap(t *testing.T) {
 	hash := crypto.Keccak256Hash([]byte("testName"))
 	topics := []common.Hash{
-		common.HexToHash("0x0"),
+		crypto.Keccak256Hash([]byte("received(string,address,uint256,bytes)")),
 		hash,
 	}
 	mockLog := newMockLog(topics, common.HexToHash("0x0"))
@@ -135,7 +135,7 @@ func TestUnpackIndexedSliceTyLogIntoMap(t *testing.T) {
 	}
 	hash := crypto.Keccak256Hash(sliceBytes)
 	topics := []common.Hash{
-		common.HexToHash("0x0"),
+		crypto.Keccak256Hash([]byte("received(string[],address,uint256,bytes)")),
 		hash,
 	}
 	mockLog := newMockLog(topics, common.HexToHash("0x0"))
@@ -160,7 +160,7 @@ func TestUnpackIndexedArrayTyLogIntoMap(t *testing.T) {
 	}
 	hash := crypto.Keccak256Hash(arrBytes)
 	topics := []common.Hash{
-		common.HexToHash("0x0"),
+		crypto.Keccak256Hash([]byte("received(address[2],address,uint256,bytes)")),
 		hash,
 	}
 	mockLog := newMockLog(topics, common.HexToHash("0x0"))
@@ -187,7 +187,7 @@ func TestUnpackIndexedFuncTyLogIntoMap(t *testing.T) {
 	var functionTy [24]byte
 	copy(functionTy[:], functionTyBytes[0:24])
 	topics := []common.Hash{
-		common.HexToHash("0x99b5620489b6ef926d4518936cfec15d305452712b88bd59da2d9c10fb0953e8"),
+		crypto.Keccak256Hash([]byte("received(function,address,uint256,bytes)")),
 		common.BytesToHash(functionTyBytes),
 	}
 	mockLog := newMockLog(topics, common.HexToHash("0x5c698f13940a2153440c6d19660878bc90219d9298fdcf37365aa8d88d40fc42"))
@@ -208,7 +208,7 @@ func TestUnpackIndexedBytesTyLogIntoMap(t *testing.T) {
 	bytes := []byte{1, 2, 3, 4, 5}
 	hash := crypto.Keccak256Hash(bytes)
 	topics := []common.Hash{
-		common.HexToHash("0x99b5620489b6ef926d4518936cfec15d305452712b88bd59da2d9c10fb0953e8"),
+		crypto.Keccak256Hash([]byte("received(bytes,address,uint256,bytes)")),
 		hash,
 	}
 	mockLog := newMockLog(topics, common.HexToHash("0x5c698f13940a2153440c6d19660878bc90219d9298fdcf37365aa8d88d40fc42"))