From 78745551c077bf54151202138c2629f288769561 Mon Sep 17 00:00:00 2001
From: Determinant <tederminant@gmail.com>
Date: Tue, 15 Sep 2020 23:55:34 -0400
Subject: WIP: geth-tavum

---
 core/rawdb/freezer_reinit.go | 127 -------------------------------------------
 1 file changed, 127 deletions(-)
 delete mode 100644 core/rawdb/freezer_reinit.go

(limited to 'core/rawdb/freezer_reinit.go')

diff --git a/core/rawdb/freezer_reinit.go b/core/rawdb/freezer_reinit.go
deleted file mode 100644
index 6b9fb79..0000000
--- a/core/rawdb/freezer_reinit.go
+++ /dev/null
@@ -1,127 +0,0 @@
-// Copyright 2019 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package rawdb
-
-import (
-	"errors"
-	"runtime"
-	"sync/atomic"
-	"time"
-
-	"github.com/ava-labs/coreth/core/types"
-	"github.com/ava-labs/go-ethereum/common"
-	"github.com/ava-labs/go-ethereum/common/prque"
-	"github.com/ava-labs/go-ethereum/ethdb"
-	"github.com/ava-labs/go-ethereum/log"
-)
-
-// InitDatabaseFromFreezer reinitializes an empty database from a previous batch
-// of frozen ancient blocks. The method iterates over all the frozen blocks and
-// injects into the database the block hash->number mappings and the transaction
-// lookup entries.
-func InitDatabaseFromFreezer(db ethdb.Database) error {
-	// If we can't access the freezer or it's empty, abort
-	frozen, err := db.Ancients()
-	if err != nil || frozen == 0 {
-		return err
-	}
-	// Blocks previously frozen, iterate over- and hash them concurrently
-	var (
-		number  = ^uint64(0) // -1
-		results = make(chan *types.Block, 4*runtime.NumCPU())
-	)
-	abort := make(chan struct{})
-	defer close(abort)
-
-	for i := 0; i < runtime.NumCPU(); i++ {
-		go func() {
-			for {
-				// Fetch the next task number, terminating if everything's done
-				n := atomic.AddUint64(&number, 1)
-				if n >= frozen {
-					return
-				}
-				// Retrieve the block from the freezer (no need for the hash, we pull by
-				// number from the freezer). If successful, pre-cache the block hash and
-				// the individual transaction hashes for storing into the database.
-				block := ReadBlock(db, common.Hash{}, n)
-				if block != nil {
-					block.Hash()
-					for _, tx := range block.Transactions() {
-						tx.Hash()
-					}
-				}
-				// Feed the block to the aggregator, or abort on interrupt
-				select {
-				case results <- block:
-				case <-abort:
-					return
-				}
-			}
-		}()
-	}
-	// Reassemble the blocks into a contiguous stream and push them out to disk
-	var (
-		queue = prque.New(nil)
-		next  = int64(0)
-
-		batch  = db.NewBatch()
-		start  = time.Now()
-		logged time.Time
-	)
-	for i := uint64(0); i < frozen; i++ {
-		// Retrieve the next result and bail if it's nil
-		block := <-results
-		if block == nil {
-			return errors.New("broken ancient database")
-		}
-		// Push the block into the import queue and process contiguous ranges
-		queue.Push(block, -int64(block.NumberU64()))
-		for !queue.Empty() {
-			// If the next available item is gapped, return
-			if _, priority := queue.Peek(); -priority != next {
-				break
-			}
-			// Next block available, pop it off and index it
-			block = queue.PopItem().(*types.Block)
-			next++
-
-			// Inject hash<->number mapping and txlookup indexes
-			WriteHeaderNumber(batch, block.Hash(), block.NumberU64())
-			WriteTxLookupEntries(batch, block)
-
-			// If enough data was accumulated in memory or we're at the last block, dump to disk
-			if batch.ValueSize() > ethdb.IdealBatchSize || uint64(next) == frozen {
-				if err := batch.Write(); err != nil {
-					return err
-				}
-				batch.Reset()
-			}
-			// If we've spent too much time already, notify the user of what we're doing
-			if time.Since(logged) > 8*time.Second {
-				log.Info("Initializing chain from ancient data", "number", block.Number(), "hash", block.Hash(), "total", frozen-1, "elapsed", common.PrettyDuration(time.Since(start)))
-				logged = time.Now()
-			}
-		}
-	}
-	hash := ReadCanonicalHash(db, frozen-1)
-	WriteHeadHeaderHash(db, hash)
-	WriteHeadFastBlockHash(db, hash)
-
-	log.Info("Initialized chain from ancient data", "number", frozen-1, "hash", hash, "elapsed", common.PrettyDuration(time.Since(start)))
-	return nil
-}
-- 
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