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Revert "trie: make rhs-proof align with last key in range proofs (#28311)"

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This reverts commit 51d0547794.
This commit is contained in:
devopsbo3 2023-11-10 12:27:53 -06:00 committed by GitHub
parent d9a1f57d51
commit d60605e9bb
6 changed files with 168 additions and 47 deletions
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6
cmd/devp2p/internal/ethtest/snap.go
View file

@ -536,7 +536,11 @@ func (s *Suite) snapGetAccountRange(t *utesting.T, tc *accRangeTest) error {
}
proofdb := nodes.Set()
_, err = trie.VerifyRangeProof(tc.root, tc.origin[:], keys, accounts, proofdb)
var end []byte
if len(keys) > 0 {
end = keys[len(keys)-1]
}
_, err = trie.VerifyRangeProof(tc.root, tc.origin[:], end, keys, accounts, proofdb)
return err
}

13
core/state/snapshot/generate.go
View file

@ -247,6 +247,11 @@ func (dl *diskLayer) proveRange(ctx *generatorContext, trieId *trie.ID, prefix [
ctx.stats.Log("Trie missing, state snapshotting paused", dl.root, dl.genMarker)
return nil, errMissingTrie
}
// Firstly find out the key of last iterated element.
var last []byte
if len(keys) > 0 {
last = keys[len(keys)-1]
}
// Generate the Merkle proofs for the first and last element
if origin == nil {
origin = common.Hash{}.Bytes()
@ -261,9 +266,9 @@ func (dl *diskLayer) proveRange(ctx *generatorContext, trieId *trie.ID, prefix [
tr: tr,
}, nil
}
if len(keys) > 0 {
if err := tr.Prove(keys[len(keys)-1], proof); err != nil {
log.Debug("Failed to prove range", "kind", kind, "last", keys[len(keys)-1], "err", err)
if last != nil {
if err := tr.Prove(last, proof); err != nil {
log.Debug("Failed to prove range", "kind", kind, "last", last, "err", err)
return &proofResult{
keys: keys,
vals: vals,
@ -275,7 +280,7 @@ func (dl *diskLayer) proveRange(ctx *generatorContext, trieId *trie.ID, prefix [
}
// Verify the snapshot segment with range prover, ensure that all flat states
// in this range correspond to merkle trie.
cont, err := trie.VerifyRangeProof(root, origin, keys, vals, proof)
cont, err := trie.VerifyRangeProof(root, origin, last, keys, vals, proof)
return &proofResult{
keys: keys,
vals: vals,

16
eth/protocols/snap/sync.go
View file

@ -2401,7 +2401,13 @@ func (s *Syncer) OnAccounts(peer SyncPeer, id uint64, hashes []common.Hash, acco
for i, node := range proof {
nodes[i] = node
}
cont, err := trie.VerifyRangeProof(root, req.origin[:], keys, accounts, nodes.Set())
proofdb := nodes.Set()
var end []byte
if len(keys) > 0 {
end = keys[len(keys)-1]
}
cont, err := trie.VerifyRangeProof(root, req.origin[:], end, keys, accounts, proofdb)
if err != nil {
logger.Warn("Account range failed proof", "err", err)
// Signal this request as failed, and ready for rescheduling
@ -2653,7 +2659,7 @@ func (s *Syncer) OnStorage(peer SyncPeer, id uint64, hashes [][]common.Hash, slo
if len(nodes) == 0 {
// No proof has been attached, the response must cover the entire key
// space and hash to the origin root.
_, err = trie.VerifyRangeProof(req.roots[i], nil, keys, slots[i], nil)
_, err = trie.VerifyRangeProof(req.roots[i], nil, nil, keys, slots[i], nil)
if err != nil {
s.scheduleRevertStorageRequest(req) // reschedule request
logger.Warn("Storage slots failed proof", "err", err)
@ -2664,7 +2670,11 @@ func (s *Syncer) OnStorage(peer SyncPeer, id uint64, hashes [][]common.Hash, slo
// returned data is indeed part of the storage trie
proofdb := nodes.Set()
cont, err = trie.VerifyRangeProof(req.roots[i], req.origin[:], keys, slots[i], proofdb)
var end []byte
if len(keys) > 0 {
end = keys[len(keys)-1]
}
cont, err = trie.VerifyRangeProof(req.roots[i], req.origin[:], end, keys, slots[i], proofdb)
if err != nil {
s.scheduleRevertStorageRequest(req) // reschedule request
logger.Warn("Storage range failed proof", "err", err)

4
tests/fuzzers/rangeproof/rangeproof-fuzzer.go
View file

@ -128,7 +128,7 @@ func (f *fuzzer) fuzz() int {
if len(keys) == 0 {
return 0
}
var first = keys[0]
var first, last = keys[0], keys[len(keys)-1]
testcase %= 6
switch testcase {
case 0:
@ -165,7 +165,7 @@ func (f *fuzzer) fuzz() int {
}
ok = 1
//nodes, subtrie
hasMore, err := trie.VerifyRangeProof(tr.Hash(), first, keys, vals, proof)
hasMore, err := trie.VerifyRangeProof(tr.Hash(), first, last, keys, vals, proof)
if err != nil {
if hasMore {
panic("err != nil && hasMore == true")

3
trie/proof.go
View file

@ -481,7 +481,7 @@ func hasRightElement(node node, key []byte) bool {
// Note: This method does not verify that the proof is of minimal form. If the input
// proofs are 'bloated' with neighbour leaves or random data, aside from the 'useful'
// data, then the proof will still be accepted.
func VerifyRangeProof(rootHash common.Hash, firstKey []byte, keys [][]byte, values [][]byte, proof ethdb.KeyValueReader) (bool, error) {
func VerifyRangeProof(rootHash common.Hash, firstKey []byte, lastKey []byte, keys [][]byte, values [][]byte, proof ethdb.KeyValueReader) (bool, error) {
if len(keys) != len(values) {
return false, fmt.Errorf("inconsistent proof data, keys: %d, values: %d", len(keys), len(values))
}
@ -520,7 +520,6 @@ func VerifyRangeProof(rootHash common.Hash, firstKey []byte, keys [][]byte, valu
}
return false, nil
}
var lastKey = keys[len(keys)-1]
// Special case, there is only one element and two edge keys are same.
// In this case, we can't construct two edge paths. So handle it here.
if len(keys) == 1 && bytes.Equal(firstKey, lastKey) {

169
trie/proof_test.go
View file

@ -191,7 +191,7 @@ func TestRangeProof(t *testing.T) {
keys = append(keys, entries[i].k)
vals = append(vals, entries[i].v)
}
_, err := VerifyRangeProof(trie.Hash(), keys[0], keys, vals, proof)
_, err := VerifyRangeProof(trie.Hash(), keys[0], keys[len(keys)-1], keys, vals, proof)
if err != nil {
t.Fatalf("Case %d(%d->%d) expect no error, got %v", i, start, end-1, err)
}
@ -221,10 +221,19 @@ func TestRangeProofWithNonExistentProof(t *testing.T) {
if bytes.Compare(first, entries[start].k) > 0 {
continue
}
// Short circuit if the increased key is same with the next key
last := increaseKey(common.CopyBytes(entries[end-1].k))
if end != len(entries) && bytes.Equal(last, entries[end].k) {
continue
}
// Short circuit if the increased key is overflow
if bytes.Compare(last, entries[end-1].k) < 0 {
continue
}
if err := trie.Prove(first, proof); err != nil {
t.Fatalf("Failed to prove the first node %v", err)
}
if err := trie.Prove(entries[end-1].k, proof); err != nil {
if err := trie.Prove(last, proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
var keys [][]byte
@ -233,15 +242,36 @@ func TestRangeProofWithNonExistentProof(t *testing.T) {
keys = append(keys, entries[i].k)
vals = append(vals, entries[i].v)
}
_, err := VerifyRangeProof(trie.Hash(), first, keys, vals, proof)
_, err := VerifyRangeProof(trie.Hash(), first, last, keys, vals, proof)
if err != nil {
t.Fatalf("Case %d(%d->%d) expect no error, got %v", i, start, end-1, err)
}
}
// Special case, two edge proofs for two edge key.
proof := memorydb.New()
first := common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000000").Bytes()
last := common.MaxHash.Bytes()
if err := trie.Prove(first, proof); err != nil {
t.Fatalf("Failed to prove the first node %v", err)
}
if err := trie.Prove(last, proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
var k [][]byte
var v [][]byte
for i := 0; i < len(entries); i++ {
k = append(k, entries[i].k)
v = append(v, entries[i].v)
}
_, err := VerifyRangeProof(trie.Hash(), first, last, k, v, proof)
if err != nil {
t.Fatal("Failed to verify whole rang with non-existent edges")
}
}
// TestRangeProofWithInvalidNonExistentProof tests such scenarios:
// - There exists a gap between the first element and the left edge proof
// - There exists a gap between the last element and the right edge proof
func TestRangeProofWithInvalidNonExistentProof(t *testing.T) {
trie, vals := randomTrie(4096)
var entries []*kv
@ -268,7 +298,29 @@ func TestRangeProofWithInvalidNonExistentProof(t *testing.T) {
k = append(k, entries[i].k)
v = append(v, entries[i].v)
}
_, err := VerifyRangeProof(trie.Hash(), first, k, v, proof)
_, err := VerifyRangeProof(trie.Hash(), first, k[len(k)-1], k, v, proof)
if err == nil {
t.Fatalf("Expected to detect the error, got nil")
}
// Case 2
start, end = 100, 200
last := increaseKey(common.CopyBytes(entries[end-1].k))
proof = memorydb.New()
if err := trie.Prove(entries[start].k, proof); err != nil {
t.Fatalf("Failed to prove the first node %v", err)
}
if err := trie.Prove(last, proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
end = 195 // Capped slice
k = make([][]byte, 0)
v = make([][]byte, 0)
for i := start; i < end; i++ {
k = append(k, entries[i].k)
v = append(v, entries[i].v)
}
_, err = VerifyRangeProof(trie.Hash(), k[0], last, k, v, proof)
if err == nil {
t.Fatalf("Expected to detect the error, got nil")
}
@ -292,7 +344,7 @@ func TestOneElementRangeProof(t *testing.T) {
if err := trie.Prove(entries[start].k, proof); err != nil {
t.Fatalf("Failed to prove the first node %v", err)
}
_, err := VerifyRangeProof(trie.Hash(), entries[start].k, [][]byte{entries[start].k}, [][]byte{entries[start].v}, proof)
_, err := VerifyRangeProof(trie.Hash(), entries[start].k, entries[start].k, [][]byte{entries[start].k}, [][]byte{entries[start].v}, proof)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
@ -307,7 +359,7 @@ func TestOneElementRangeProof(t *testing.T) {
if err := trie.Prove(entries[start].k, proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
_, err = VerifyRangeProof(trie.Hash(), first, [][]byte{entries[start].k}, [][]byte{entries[start].v}, proof)
_, err = VerifyRangeProof(trie.Hash(), first, entries[start].k, [][]byte{entries[start].k}, [][]byte{entries[start].v}, proof)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
@ -322,7 +374,7 @@ func TestOneElementRangeProof(t *testing.T) {
if err := trie.Prove(last, proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
_, err = VerifyRangeProof(trie.Hash(), entries[start].k, [][]byte{entries[start].k}, [][]byte{entries[start].v}, proof)
_, err = VerifyRangeProof(trie.Hash(), entries[start].k, last, [][]byte{entries[start].k}, [][]byte{entries[start].v}, proof)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
@ -337,7 +389,7 @@ func TestOneElementRangeProof(t *testing.T) {
if err := trie.Prove(last, proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
_, err = VerifyRangeProof(trie.Hash(), first, [][]byte{entries[start].k}, [][]byte{entries[start].v}, proof)
_, err = VerifyRangeProof(trie.Hash(), first, last, [][]byte{entries[start].k}, [][]byte{entries[start].v}, proof)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
@ -356,7 +408,7 @@ func TestOneElementRangeProof(t *testing.T) {
if err := tinyTrie.Prove(last, proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
_, err = VerifyRangeProof(tinyTrie.Hash(), first, [][]byte{entry.k}, [][]byte{entry.v}, proof)
_, err = VerifyRangeProof(tinyTrie.Hash(), first, last, [][]byte{entry.k}, [][]byte{entry.v}, proof)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
@ -378,7 +430,7 @@ func TestAllElementsProof(t *testing.T) {
k = append(k, entries[i].k)
v = append(v, entries[i].v)
}
_, err := VerifyRangeProof(trie.Hash(), nil, k, v, nil)
_, err := VerifyRangeProof(trie.Hash(), nil, nil, k, v, nil)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
@ -391,7 +443,7 @@ func TestAllElementsProof(t *testing.T) {
if err := trie.Prove(entries[len(entries)-1].k, proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
_, err = VerifyRangeProof(trie.Hash(), k[0], k, v, proof)
_, err = VerifyRangeProof(trie.Hash(), k[0], k[len(k)-1], k, v, proof)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
@ -399,13 +451,14 @@ func TestAllElementsProof(t *testing.T) {
// Even with non-existent edge proofs, it should still work.
proof = memorydb.New()
first := common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000000").Bytes()
last := common.MaxHash.Bytes()
if err := trie.Prove(first, proof); err != nil {
t.Fatalf("Failed to prove the first node %v", err)
}
if err := trie.Prove(entries[len(entries)-1].k, proof); err != nil {
if err := trie.Prove(last, proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
_, err = VerifyRangeProof(trie.Hash(), first, k, v, proof)
_, err = VerifyRangeProof(trie.Hash(), first, last, k, v, proof)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
@ -438,7 +491,43 @@ func TestSingleSideRangeProof(t *testing.T) {
k = append(k, entries[i].k)
v = append(v, entries[i].v)
}
_, err := VerifyRangeProof(trie.Hash(), common.Hash{}.Bytes(), k, v, proof)
_, err := VerifyRangeProof(trie.Hash(), common.Hash{}.Bytes(), k[len(k)-1], k, v, proof)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
}
}
}
// TestReverseSingleSideRangeProof tests the range ends with 0xffff...fff.
func TestReverseSingleSideRangeProof(t *testing.T) {
for i := 0; i < 64; i++ {
trie := NewEmpty(NewDatabase(rawdb.NewMemoryDatabase(), nil))
var entries []*kv
for i := 0; i < 4096; i++ {
value := &kv{randBytes(32), randBytes(20), false}
trie.MustUpdate(value.k, value.v)
entries = append(entries, value)
}
slices.SortFunc(entries, (*kv).cmp)
var cases = []int{0, 1, 50, 100, 1000, 2000, len(entries) - 1}
for _, pos := range cases {
proof := memorydb.New()
if err := trie.Prove(entries[pos].k, proof); err != nil {
t.Fatalf("Failed to prove the first node %v", err)
}
last := common.MaxHash
if err := trie.Prove(last.Bytes(), proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
k := make([][]byte, 0)
v := make([][]byte, 0)
for i := pos; i < len(entries); i++ {
k = append(k, entries[i].k)
v = append(v, entries[i].v)
}
_, err := VerifyRangeProof(trie.Hash(), k[0], last.Bytes(), k, v, proof)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
@ -472,7 +561,7 @@ func TestBadRangeProof(t *testing.T) {
keys = append(keys, entries[i].k)
vals = append(vals, entries[i].v)
}
var first = keys[0]
var first, last = keys[0], keys[len(keys)-1]
testcase := mrand.Intn(6)
var index int
switch testcase {
@ -487,7 +576,7 @@ func TestBadRangeProof(t *testing.T) {
case 2:
// Gapped entry slice
index = mrand.Intn(end - start)
if (index == 0 && start < 100) || (index == end-start-1) {
if (index == 0 && start < 100) || (index == end-start-1 && end <= 100) {
continue
}
keys = append(keys[:index], keys[index+1:]...)
@ -510,7 +599,7 @@ func TestBadRangeProof(t *testing.T) {
index = mrand.Intn(end - start)
vals[index] = nil
}
_, err := VerifyRangeProof(trie.Hash(), first, keys, vals, proof)
_, err := VerifyRangeProof(trie.Hash(), first, last, keys, vals, proof)
if err == nil {
t.Fatalf("%d Case %d index %d range: (%d->%d) expect error, got nil", i, testcase, index, start, end-1)
}
@ -544,7 +633,7 @@ func TestGappedRangeProof(t *testing.T) {
keys = append(keys, entries[i].k)
vals = append(vals, entries[i].v)
}
_, err := VerifyRangeProof(trie.Hash(), keys[0], keys, vals, proof)
_, err := VerifyRangeProof(trie.Hash(), keys[0], keys[len(keys)-1], keys, vals, proof)
if err == nil {
t.Fatal("expect error, got nil")
}
@ -560,22 +649,24 @@ func TestSameSideProofs(t *testing.T) {
slices.SortFunc(entries, (*kv).cmp)
pos := 1000
first := common.CopyBytes(entries[0].k)
first := decreaseKey(common.CopyBytes(entries[pos].k))
first = decreaseKey(first)
last := decreaseKey(common.CopyBytes(entries[pos].k))
proof := memorydb.New()
if err := trie.Prove(first, proof); err != nil {
t.Fatalf("Failed to prove the first node %v", err)
}
if err := trie.Prove(entries[2000].k, proof); err != nil {
t.Fatalf("Failed to prove the first node %v", err)
if err := trie.Prove(last, proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
_, err := VerifyRangeProof(trie.Hash(), first, [][]byte{entries[pos].k}, [][]byte{entries[pos].v}, proof)
_, err := VerifyRangeProof(trie.Hash(), first, last, [][]byte{entries[pos].k}, [][]byte{entries[pos].v}, proof)
if err == nil {
t.Fatalf("Expected error, got nil")
}
first = increaseKey(common.CopyBytes(entries[pos].k))
last := increaseKey(common.CopyBytes(entries[pos].k))
last = increaseKey(common.CopyBytes(entries[pos].k))
last = increaseKey(last)
proof = memorydb.New()
@ -585,7 +676,7 @@ func TestSameSideProofs(t *testing.T) {
if err := trie.Prove(last, proof); err != nil {
t.Fatalf("Failed to prove the last node %v", err)
}
_, err = VerifyRangeProof(trie.Hash(), first, [][]byte{entries[pos].k}, [][]byte{entries[pos].v}, proof)
_, err = VerifyRangeProof(trie.Hash(), first, last, [][]byte{entries[pos].k}, [][]byte{entries[pos].v}, proof)
if err == nil {
t.Fatalf("Expected error, got nil")
}
@ -612,12 +703,15 @@ func TestHasRightElement(t *testing.T) {
{50, 100, true},
{50, len(entries), false}, // No more element expected
{len(entries) - 1, len(entries), false}, // Single last element with two existent proofs(point to same key)
{len(entries) - 1, -1, false}, // Single last element with non-existent right proof
{0, len(entries), false}, // The whole set with existent left proof
{-1, len(entries), false}, // The whole set with non-existent left proof
{-1, -1, false}, // The whole set with non-existent left/right proof
}
for _, c := range cases {
var (
firstKey []byte
lastKey []byte
start = c.start
end = c.end
proof = memorydb.New()
@ -633,16 +727,24 @@ func TestHasRightElement(t *testing.T) {
t.Fatalf("Failed to prove the first node %v", err)
}
}
if c.end == -1 {
lastKey, end = common.MaxHash.Bytes(), len(entries)
if err := trie.Prove(lastKey, proof); err != nil {
t.Fatalf("Failed to prove the first node %v", err)
}
} else {
lastKey = entries[c.end-1].k
if err := trie.Prove(entries[c.end-1].k, proof); err != nil {
t.Fatalf("Failed to prove the first node %v", err)
}
}
k := make([][]byte, 0)
v := make([][]byte, 0)
for i := start; i < end; i++ {
k = append(k, entries[i].k)
v = append(v, entries[i].v)
}
hasMore, err := VerifyRangeProof(trie.Hash(), firstKey, k, v, proof)
hasMore, err := VerifyRangeProof(trie.Hash(), firstKey, lastKey, k, v, proof)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
@ -675,7 +777,7 @@ func TestEmptyRangeProof(t *testing.T) {
if err := trie.Prove(first, proof); err != nil {
t.Fatalf("Failed to prove the first node %v", err)
}
_, err := VerifyRangeProof(trie.Hash(), first, nil, nil, proof)
_, err := VerifyRangeProof(trie.Hash(), first, nil, nil, nil, proof)
if c.err && err == nil {
t.Fatalf("Expected error, got nil")
}
@ -715,7 +817,7 @@ func TestBloatedProof(t *testing.T) {
trie.Prove(keys[0], want)
trie.Prove(keys[len(keys)-1], want)
if _, err := VerifyRangeProof(trie.Hash(), keys[0], keys, vals, proof); err != nil {
if _, err := VerifyRangeProof(trie.Hash(), keys[0], keys[len(keys)-1], keys, vals, proof); err != nil {
t.Fatalf("expected bloated proof to succeed, got %v", err)
}
}
@ -758,7 +860,7 @@ func TestEmptyValueRangeProof(t *testing.T) {
keys = append(keys, entries[i].k)
vals = append(vals, entries[i].v)
}
_, err := VerifyRangeProof(trie.Hash(), keys[0], keys, vals, proof)
_, err := VerifyRangeProof(trie.Hash(), keys[0], keys[len(keys)-1], keys, vals, proof)
if err == nil {
t.Fatalf("Expected failure on noop entry")
}
@ -793,7 +895,7 @@ func TestAllElementsEmptyValueRangeProof(t *testing.T) {
keys = append(keys, entries[i].k)
vals = append(vals, entries[i].v)
}
_, err := VerifyRangeProof(trie.Hash(), nil, keys, vals, nil)
_, err := VerifyRangeProof(trie.Hash(), nil, nil, keys, vals, nil)
if err == nil {
t.Fatalf("Expected failure on noop entry")
}
@ -899,7 +1001,7 @@ func benchmarkVerifyRangeProof(b *testing.B, size int) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, err := VerifyRangeProof(trie.Hash(), keys[0], keys, values, proof)
_, err := VerifyRangeProof(trie.Hash(), keys[0], keys[len(keys)-1], keys, values, proof)
if err != nil {
b.Fatalf("Case %d(%d->%d) expect no error, got %v", i, start, end-1, err)
}
@ -926,7 +1028,7 @@ func benchmarkVerifyRangeNoProof(b *testing.B, size int) {
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, err := VerifyRangeProof(trie.Hash(), keys[0], keys, values, nil)
_, err := VerifyRangeProof(trie.Hash(), keys[0], keys[len(keys)-1], keys, values, nil)
if err != nil {
b.Fatalf("Expected no error, got %v", err)
}
@ -985,14 +1087,15 @@ func TestRangeProofKeysWithSharedPrefix(t *testing.T) {
root := trie.Hash()
proof := memorydb.New()
start := common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000000")
end := common.Hex2Bytes("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff")
if err := trie.Prove(start, proof); err != nil {
t.Fatalf("failed to prove start: %v", err)
}
if err := trie.Prove(keys[len(keys)-1], proof); err != nil {
if err := trie.Prove(end, proof); err != nil {
t.Fatalf("failed to prove end: %v", err)
}
more, err := VerifyRangeProof(root, start, keys, vals, proof)
more, err := VerifyRangeProof(root, start, end, keys, vals, proof)
if err != nil {
t.Fatalf("failed to verify range proof: %v", err)
}