Decouple log extraction from transformer delegation

- limit missing headers results set to 100 so that extraction doesn't
  excessively block delegation
- wrap checked headers functions in repository struct
- move storage repository to factory, to correspond with event
  repository path
- remove unused files
- reformat sql
- remove line breaks in imports

pkg/core/blockchain.go

@@ -31,7 +31,7 @@ type BlockChain interface {
 	GetEthLogsWithCustomQuery(query ethereum.FilterQuery) ([]types.Log, error)
 	GetHeaderByNumber(blockNumber int64) (Header, error)
 	GetHeadersByNumbers(blockNumbers []int64) ([]Header, error)
-	GetLogs(contract Contract, startingBlockNumber *big.Int, endingBlockNumber *big.Int) ([]Log, error)
+	GetFullSyncLogs(contract Contract, startingBlockNumber *big.Int, endingBlockNumber *big.Int) ([]FullSyncLog, error)
 	GetTransactions(transactionHashes []common.Hash) ([]TransactionModel, error)
 	LastBlock() (*big.Int, error)
 	Node() Node

pkg/core/log.go

@@ -18,7 +18,7 @@ package core
 
 import "github.com/ethereum/go-ethereum/core/types"
 
-type Log struct {
+type FullSyncLog struct {
 	BlockNumber int64
 	TxHash      string
 	Address     string

pkg/core/receipts.go

@@ -21,7 +21,7 @@ type Receipt struct {
 	ContractAddress   string `db:"contract_address"`
 	CumulativeGasUsed uint64 `db:"cumulative_gas_used"`
 	GasUsed           uint64 `db:"gas_used"`
-	Logs              []Log
+	Logs              []FullSyncLog
 	StateRoot         string `db:"state_root"`
 	Status            int
 	TxHash            string `db:"tx_hash"`