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accounts/abi/bind: fixed erroneous filtering of negative ints #20865

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Merged
merged 4 commits into from
Apr 9, 2020
Merged

accounts/abi/bind: fixed erroneous filtering of negative ints #20865

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f070287
accounts/abi/bind: fixed erroneous packing of negative ints
MariusVanDerWijden Apr 1, 2020
a95417f
accounts/abi/bind: added test cases for negative ints in topics
MariusVanDerWijden Mar 31, 2020
4b8e707
accounts/abi/bind: fixed genIntType for go 1.12
MariusVanDerWijden Apr 3, 2020
c39c4f5
accounts/abi: minor nitpick
MariusVanDerWijden Apr 8, 2020
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25 changes: 17 additions & 8 deletions accounts/abi/bind/topics.go
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Original file line number Diff line number Diff line change
Expand Up @@ -49,17 +49,13 @@ func makeTopics(query ...[]interface{}) ([][]common.Hash, error) {
topic[common.HashLength-1] = 1
}
case int8:
blob := big.NewInt(int64(rule)).Bytes()
copy(topic[common.HashLength-len(blob):], blob)
copy(topic[:], genIntType(int64(rule), 1))
case int16:
blob := big.NewInt(int64(rule)).Bytes()
copy(topic[common.HashLength-len(blob):], blob)
copy(topic[:], genIntType(int64(rule), 2))
case int32:
blob := big.NewInt(int64(rule)).Bytes()
copy(topic[common.HashLength-len(blob):], blob)
copy(topic[:], genIntType(int64(rule), 4))
case int64:
blob := big.NewInt(rule).Bytes()
copy(topic[common.HashLength-len(blob):], blob)
copy(topic[:], genIntType(rule, 8))
case uint8:
blob := new(big.Int).SetUint64(uint64(rule)).Bytes()
copy(topic[common.HashLength-len(blob):], blob)
Expand Down Expand Up @@ -103,6 +99,19 @@ func makeTopics(query ...[]interface{}) ([][]common.Hash, error) {
return topics, nil
}

func genIntType(rule int64, size uint) []byte {
var topic [common.HashLength]byte
if rule < 0 {
// if a rule is negative, we need to put it into two's complement.
// extended to common.Hashlength bytes.
topic = [common.HashLength]byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}
}
for i := uint(0); i < size; i++ {
topic[common.HashLength-i-1] = byte(rule >> (i * 8))
}
return topic[:]
}

// parseTopics converts the indexed topic fields into actual log field values.
func parseTopics(out interface{}, fields abi.Arguments, topics []common.Hash) error {
return parseTopicWithSetter(fields, topics,
Expand Down
75 changes: 75 additions & 0 deletions accounts/abi/bind/topics_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ import (

"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
)

func TestMakeTopics(t *testing.T) {
Expand All @@ -41,6 +42,80 @@ func TestMakeTopics(t *testing.T) {
[][]common.Hash{{common.Hash{1, 2, 3, 4, 5}}},
false,
},
{
"support common hash types in topics",
args{[][]interface{}{{common.Hash{1, 2, 3, 4, 5}}}},
[][]common.Hash{{common.Hash{1, 2, 3, 4, 5}}},
false,
},
{
"support address types in topics",
args{[][]interface{}{{common.Address{1, 2, 3, 4, 5}}}},
[][]common.Hash{{common.Hash{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5}}},
false,
},
{
"support *big.Int types in topics",
args{[][]interface{}{{big.NewInt(1).Lsh(big.NewInt(2), 254)}}},
[][]common.Hash{{common.Hash{128}}},
false,
},
{
"support boolean types in topics",
args{[][]interface{}{
{true},
{false},
}},
[][]common.Hash{
{common.Hash{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}},
{common.Hash{0}},
},
false,
},
{
"support int/uint(8/16/32/64) types in topics",
args{[][]interface{}{
{int8(-2)},
{int16(-3)},
{int32(-4)},
{int64(-5)},
{int8(1)},
{int16(256)},
{int32(65536)},
{int64(4294967296)},
{uint8(1)},
{uint16(256)},
{uint32(65536)},
{uint64(4294967296)},
}},
[][]common.Hash{
{common.Hash{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254}},
{common.Hash{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 253}},
{common.Hash{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 252}},
{common.Hash{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 251}},
{common.Hash{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}},
{common.Hash{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0}},
{common.Hash{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0}},
{common.Hash{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0}},
{common.Hash{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}},
{common.Hash{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0}},
{common.Hash{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0}},
{common.Hash{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0}},
},
false,
},
{
"support string types in topics",
args{[][]interface{}{{"hello world"}}},
[][]common.Hash{{crypto.Keccak256Hash([]byte("hello world"))}},
false,
},
{
"support byte slice types in topics",
args{[][]interface{}{{[]byte{1, 2, 3}}}},
[][]common.Hash{{crypto.Keccak256Hash([]byte{1, 2, 3})}},
false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
Expand Down