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eth/downloader: dynamically move pivot even during chain sync

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This commit is contained in:
Péter Szilágyi
2020-09-08 11:13:16 +03:00
parent faba018b29
commit fb835c024c
3 changed files with 192 additions and 72 deletions
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25
eth/downloader/testchain_test.go
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@ -170,18 +170,27 @@ func (tc *testChain) td(hash common.Hash) *big.Int {
return tc.tdm[hash]
}
// headersByHash returns headers in ascending order from the given hash.
func (tc *testChain) headersByHash(origin common.Hash, amount int, skip int) []*types.Header {
// headersByHash returns headers in order from the given hash.
func (tc *testChain) headersByHash(origin common.Hash, amount int, skip int, reverse bool) []*types.Header {
num, _ := tc.hashToNumber(origin)
return tc.headersByNumber(num, amount, skip)
return tc.headersByNumber(num, amount, skip, reverse)
}
// headersByNumber returns headers in ascending order from the given number.
func (tc *testChain) headersByNumber(origin uint64, amount int, skip int) []*types.Header {
// headersByNumber returns headers from the given number.
func (tc *testChain) headersByNumber(origin uint64, amount int, skip int, reverse bool) []*types.Header {
result := make([]*types.Header, 0, amount)
for num := origin; num < uint64(len(tc.chain)) && len(result) < amount; num += uint64(skip) + 1 {
if header, ok := tc.headerm[tc.chain[int(num)]]; ok {
result = append(result, header)
if !reverse {
for num := origin; num < uint64(len(tc.chain)) && len(result) < amount; num += uint64(skip) + 1 {
if header, ok := tc.headerm[tc.chain[int(num)]]; ok {
result = append(result, header)
}
}
} else {
for num := int64(origin); num >= 0 && len(result) < amount; num -= int64(skip) + 1 {
if header, ok := tc.headerm[tc.chain[int(num)]]; ok {
result = append(result, header)
}
}
}
return result