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core/bloombits, eth/filters: handle null topics (#15195)

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When implementing the new bloombits based filter, I've accidentally broke null
topics by removing the special casing of common.Hash{} filter rules, which
acted as the wildcard topic until now.

This PR fixes the regression, but instead of using the magic hash
common.Hash{} as the null wildcard, the PR reworks the code to handle nil
topics during parsing, converting a JSON null into nil []common.Hash topic.
This commit is contained in:
Péter Szilágyi
2017-09-27 13:14:52 +03:00
committed by Felix Lange
parent 860e697b00
commit 2ab2a9f131
7 changed files with 68 additions and 48 deletions
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28
core/bloombits/matcher_test.go
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@ -21,10 +21,38 @@ import (
"sync/atomic"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
)
const testSectionSize = 4096
// Tests that wildcard filter rules (nil) can be specified and are handled well.
func TestMatcherWildcards(t *testing.T) {
matcher := NewMatcher(testSectionSize, [][][]byte{
[][]byte{common.Address{}.Bytes(), common.Address{0x01}.Bytes()}, // Default address is not a wildcard
[][]byte{common.Hash{}.Bytes(), common.Hash{0x01}.Bytes()}, // Default hash is not a wildcard
[][]byte{common.Hash{0x01}.Bytes()}, // Plain rule, sanity check
[][]byte{common.Hash{0x01}.Bytes(), nil}, // Wildcard suffix, drop rule
[][]byte{nil, common.Hash{0x01}.Bytes()}, // Wildcard prefix, drop rule
[][]byte{nil, nil}, // Wildcard combo, drop rule
[][]byte{}, // Inited wildcard rule, drop rule
nil, // Proper wildcard rule, drop rule
})
if len(matcher.filters) != 3 {
t.Fatalf("filter system size mismatch: have %d, want %d", len(matcher.filters), 3)
}
if len(matcher.filters[0]) != 2 {
t.Fatalf("address clause size mismatch: have %d, want %d", len(matcher.filters[0]), 2)
}
if len(matcher.filters[1]) != 2 {
t.Fatalf("combo topic clause size mismatch: have %d, want %d", len(matcher.filters[1]), 2)
}
if len(matcher.filters[2]) != 1 {
t.Fatalf("singletone topic clause size mismatch: have %d, want %d", len(matcher.filters[2]), 1)
}
}
// Tests the matcher pipeline on a single continuous workflow without interrupts.
func TestMatcherContinuous(t *testing.T) {
testMatcherDiffBatches(t, [][]bloomIndexes{{{10, 20, 30}}}, 100000, false, 75)