1 files changed, 0 insertions, 87 deletions
diff --git a/core/chain_pow.go b/core/chain_pow.go
deleted file mode 100644
index e5ccd87e2..000000000
--- a/core/chain_pow.go
+++ /dev/null
@@ -1,87 +0,0 @@
-// Copyright 2015 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 core
-
-import (
-	"runtime"
-
-	"github.com/ethereum/go-ethereum/core/types"
-	"github.com/ethereum/go-ethereum/pow"
-)
-
-// nonceCheckResult contains the result of a nonce verification.
-type nonceCheckResult struct {
-	index int  // Index of the item verified from an input array
-	valid bool // Result of the nonce verification
-}
-
-// verifyNoncesFromHeaders starts a concurrent header nonce verification,
-// returning a quit channel to abort the operations and a results channel
-// to retrieve the async verifications.
-func verifyNoncesFromHeaders(checker pow.PoW, headers []*types.Header) (chan<- struct{}, <-chan nonceCheckResult) {
-	items := make([]pow.Block, len(headers))
-	for i, header := range headers {
-		items[i] = types.NewBlockWithHeader(header)
-	}
-	return verifyNonces(checker, items)
-}
-
-// verifyNoncesFromBlocks starts a concurrent block nonce verification,
-// returning a quit channel to abort the operations and a results channel
-// to retrieve the async verifications.
-func verifyNoncesFromBlocks(checker pow.PoW, blocks []*types.Block) (chan<- struct{}, <-chan nonceCheckResult) {
-	items := make([]pow.Block, len(blocks))
-	for i, block := range blocks {
-		items[i] = block
-	}
-	return verifyNonces(checker, items)
-}
-
-// verifyNonces starts a concurrent nonce verification, returning a quit channel
-// to abort the operations and a results channel to retrieve the async checks.
-func verifyNonces(checker pow.PoW, items []pow.Block) (chan<- struct{}, <-chan nonceCheckResult) {
-	// Spawn as many workers as allowed threads
-	workers := runtime.GOMAXPROCS(0)
-	if len(items) < workers {
-		workers = len(items)
-	}
-	// Create a task channel and spawn the verifiers
-	tasks := make(chan int, workers)
-	results := make(chan nonceCheckResult, len(items)) // Buffered to make sure all workers stop
-	for i := 0; i < workers; i++ {
-		go func() {
-			for index := range tasks {
-				results <- nonceCheckResult{index: index, valid: checker.Verify(items[index]) == nil}
-			}
-		}()
-	}
-	// Feed item indices to the workers until done or aborted
-	abort := make(chan struct{})
-	go func() {
-		defer close(tasks)
-
-		for i := range items {
-			select {
-			case tasks <- i:
-				continue
-			case <-abort:
-				return
-			}
-		}
-	}()
-	return abort, results
-}