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core/rawdb: add slow path for getting legacy logs (#23879)

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* eth/tracers: add slow path for getting legacy logs

* core/rawdb: fix test
This commit is contained in:
Sina Mahmoodi 2021-11-11 15:04:06 +01:00 committed by GitHub
parent f32feeb260
commit c57df9ca28
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 24 additions and 4 deletions
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24
core/rawdb/accessors_chain.go
View File

@ -669,7 +669,7 @@ func deriveLogFields(receipts []*receiptLogs, hash common.Hash, number uint64, t
// ReadLogs retrieves the logs for all transactions in a block. The log fields
// are populated with metadata. In case the receipts or the block body
// are not found, a nil is returned.
func ReadLogs(db ethdb.Reader, hash common.Hash, number uint64) [][]*types.Log {
func ReadLogs(db ethdb.Reader, hash common.Hash, number uint64, config *params.ChainConfig) [][]*types.Log {
// Retrieve the flattened receipt slice
data := ReadReceiptsRLP(db, hash, number)
if len(data) == 0 {
@ -677,7 +677,12 @@ func ReadLogs(db ethdb.Reader, hash common.Hash, number uint64) [][]*types.Log {
}
receipts := []*receiptLogs{}
if err := rlp.DecodeBytes(data, &receipts); err != nil {
log.Error("Invalid receipt array RLP", "hash", hash, "err", err)
// Receipts might be in the legacy format, try decoding that.
// TODO: to be removed after users migrated
if logs := readLegacyLogs(db, hash, number, config); logs != nil {
return logs
}
log.Error("Invalid receipt array RLP", "hash", "err", err)
return nil
}
@ -697,6 +702,21 @@ func ReadLogs(db ethdb.Reader, hash common.Hash, number uint64) [][]*types.Log {
return logs
}
// readLegacyLogs is a temporary workaround for when trying to read logs
// from a block which has its receipt stored in the legacy format. It'll
// be removed after users have migrated their freezer databases.
func readLegacyLogs(db ethdb.Reader, hash common.Hash, number uint64, config *params.ChainConfig) [][]*types.Log {
receipts := ReadReceipts(db, hash, number, config)
if receipts == nil {
return nil
}
logs := make([][]*types.Log, len(receipts))
for i, receipt := range receipts {
logs[i] = receipt.Logs
}
return logs
}
// ReadBlock retrieves an entire block corresponding to the hash, assembling it
// back from the stored header and body. If either the header or body could not
// be retrieved nil is returned.

2
core/rawdb/accessors_chain_test.go
View File

@ -744,7 +744,7 @@ func TestReadLogs(t *testing.T) {
// Insert the receipt slice into the database and check presence
WriteReceipts(db, hash, 0, receipts)
logs := ReadLogs(db, hash, 0)
logs := ReadLogs(db, hash, 0, params.TestChainConfig)
if len(logs) == 0 {
t.Fatalf("no logs returned")
}

2
eth/api_backend.go
View File

@ -187,7 +187,7 @@ func (b *EthAPIBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*typ
if number == nil {
return nil, errors.New("failed to get block number from hash")
}
logs := rawdb.ReadLogs(db, hash, *number)
logs := rawdb.ReadLogs(db, hash, *number, b.eth.blockchain.Config())
if logs == nil {
return nil, errors.New("failed to get logs for block")
}