core, core/vm, core/state: remove unused functions

core/block_cache.go

-// 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 (
-	"sync"
-
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/core/types"
-)
-
-// BlockCache implements a caching mechanism specifically for blocks and uses FILO to pop
-type BlockCache struct {
-	size int
-
-	hashes []common.Hash
-	blocks map[common.Hash]*types.Block
-
-	mu sync.RWMutex
-}
-
-// Creates and returns a `BlockCache` with `size`. If `size` is smaller than 1 it will panic
-func NewBlockCache(size int) *BlockCache {
-	if size < 1 {
-		panic("block cache size not allowed to be smaller than 1")
-	}
-
-	bc := &BlockCache{size: size}
-	bc.Clear()
-	return bc
-}
-
-func (bc *BlockCache) Clear() {
-	bc.blocks = make(map[common.Hash]*types.Block)
-	bc.hashes = nil
-
-}
-
-func (bc *BlockCache) Push(block *types.Block) {
-	bc.mu.Lock()
-	defer bc.mu.Unlock()
-
-	if len(bc.hashes) == bc.size {
-		delete(bc.blocks, bc.hashes[0])
-
-		// XXX There are a few other options on solving this
-		// 1) use a poller / GC like mechanism to clean up untracked objects
-		// 2) copy as below
-		// re-use the slice and remove the reference to bc.hashes[0]
-		// this will allow the element to be garbage collected.
-		copy(bc.hashes, bc.hashes[1:])
-	} else {
-		bc.hashes = append(bc.hashes, common.Hash{})
-	}
-
-	hash := block.Hash()
-	bc.blocks[hash] = block
-	bc.hashes[len(bc.hashes)-1] = hash
-}
-
-func (bc *BlockCache) Delete(hash common.Hash) {
-	bc.mu.Lock()
-	defer bc.mu.Unlock()
-
-	if _, ok := bc.blocks[hash]; ok {
-		delete(bc.blocks, hash)
-		for i, h := range bc.hashes {
-			if hash == h {
-				bc.hashes = bc.hashes[:i+copy(bc.hashes[i:], bc.hashes[i+1:])]
-				// or ? => bc.hashes = append(bc.hashes[:i], bc.hashes[i+1]...)
-
-				break
-			}
-		}
-	}
-}
-
-func (bc *BlockCache) Get(hash common.Hash) *types.Block {
-	bc.mu.RLock()
-	defer bc.mu.RUnlock()
-
-	if block, haz := bc.blocks[hash]; haz {
-		return block
-	}
-
-	return nil
-}
-
-func (bc *BlockCache) Has(hash common.Hash) bool {
-	bc.mu.RLock()
-	defer bc.mu.RUnlock()
-
-	_, ok := bc.blocks[hash]
-	return ok
-}
-
-func (bc *BlockCache) Each(cb func(int, *types.Block)) {
-	bc.mu.Lock()
-	defer bc.mu.Unlock()
-
-	i := 0
-	for _, block := range bc.blocks {
-		cb(i, block)
-		i++
-	}
-}

core/block_cache_test.go

-// 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 (
-	"math/big"
-	"testing"
-
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/core/types"
-)
-
-func newChain(size int) (chain []*types.Block) {
-	var parentHash common.Hash
-	for i := 0; i < size; i++ {
-		head := &types.Header{ParentHash: parentHash, Number: big.NewInt(int64(i))}
-		block := types.NewBlock(head, nil, nil, nil)
-		chain = append(chain, block)
-		parentHash = block.Hash()
-	}
-	return chain
-}
-
-func insertChainCache(cache *BlockCache, chain []*types.Block) {
-	for _, block := range chain {
-		cache.Push(block)
-	}
-}
-
-func TestNewBlockCache(t *testing.T) {
-	chain := newChain(3)
-	cache := NewBlockCache(2)
-	insertChainCache(cache, chain)
-
-	if cache.hashes[0] != chain[1].Hash() {
-		t.Error("oldest block incorrect")
-	}
-}
-
-func TestInclusion(t *testing.T) {
-	chain := newChain(3)
-	cache := NewBlockCache(3)
-	insertChainCache(cache, chain)
-
-	for _, block := range chain {
-		if b := cache.Get(block.Hash()); b == nil {
-			t.Errorf("getting %x failed", block.Hash())
-		}
-	}
-}
-
-func TestDeletion(t *testing.T) {
-	chain := newChain(3)
-	cache := NewBlockCache(3)
-	insertChainCache(cache, chain)
-
-	cache.Delete(chain[1].Hash())
-
-	if cache.Has(chain[1].Hash()) {
-		t.Errorf("expected %x not to be included")
-	}
-}

core/state/state_object.go

@@ -87,10 +87,6 @@ type StateObject struct {
 	dirty   bool
 }
 
-func (self *StateObject) Reset() {
-	self.storage = make(Storage)
-}
-
 func NewStateObject(address common.Address, db common.Database) *StateObject {
 	object := &StateObject{db: db, address: address, balance: new(big.Int), gasPool: new(big.Int), dirty: true}
 	object.trie = trie.NewSecure((common.Hash{}).Bytes(), db)
@@ -184,14 +180,6 @@ func (self *StateObject) Update() {
 	}
 }
 
-func (c *StateObject) GetInstr(pc *big.Int) *common.Value {
-	if int64(len(c.code)-1) < pc.Int64() {
-		return common.NewValue(0)
-	}
-
-	return common.NewValueFromBytes([]byte{c.code[pc.Int64()]})
-}
-
 func (c *StateObject) AddBalance(amount *big.Int) {
 	c.SetBalance(new(big.Int).Add(c.balance, amount))
 
@@ -268,10 +256,6 @@ func (self *StateObject) Copy() *StateObject {
 	return stateObject
 }
 
-func (self *StateObject) Set(stateObject *StateObject) {
-	*self = *stateObject
-}
-
 //
 // Attribute accessors
 //
@@ -280,20 +264,11 @@ func (self *StateObject) Balance() *big.Int {
 	return self.balance
 }
 
-func (c *StateObject) N() *big.Int {
-	return big.NewInt(int64(c.nonce))
-}
-
 // Returns the address of the contract/account
 func (c *StateObject) Address() common.Address {
 	return c.address
 }
 
-// Returns the initialization Code
-func (c *StateObject) Init() Code {
-	return c.initCode
-}
-
 func (self *StateObject) Trie() *trie.SecureTrie {
 	return self.trie
 }
@@ -311,11 +286,6 @@ func (self *StateObject) SetCode(code []byte) {
 	self.dirty = true
 }
 
-func (self *StateObject) SetInitCode(code []byte) {
-	self.initCode = code
-	self.dirty = true
-}
-
 func (self *StateObject) SetNonce(nonce uint64) {
 	self.nonce = nonce
 	self.dirty = true
@@ -354,19 +324,6 @@ func (c *StateObject) CodeHash() common.Bytes {
 	return crypto.Sha3(c.code)
 }
 
-func (c *StateObject) RlpDecode(data []byte) {
-	decoder := common.NewValueFromBytes(data)
-	c.nonce = decoder.Get(0).Uint()
-	c.balance = decoder.Get(1).BigInt()
-	c.trie = trie.NewSecure(decoder.Get(2).Bytes(), c.db)
-	c.storage = make(map[string]common.Hash)
-	c.gasPool = new(big.Int)
-
-	c.codeHash = decoder.Get(3).Bytes()
-
-	c.code, _ = c.db.Get(c.codeHash)
-}
-
 // Storage change object. Used by the manifest for notifying changes to
 // the sub channels.
 type StorageState struct {

core/state/statedb.go

@@ -18,7 +18,6 @@
 package state
 
 import (
-	"bytes"
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -276,10 +275,6 @@ func (self *StateDB) CreateAccount(addr common.Address) *StateObject {
 // Setting, copying of the state methods
 //
 
-func (s *StateDB) Cmp(other *StateDB) bool {
-	return bytes.Equal(s.trie.Root(), other.trie.Root())
-}
-
 func (self *StateDB) Copy() *StateDB {
 	state := New(common.Hash{}, self.db)
 	state.trie = self.trie
@@ -311,22 +306,6 @@ func (s *StateDB) Root() common.Hash {
 	return common.BytesToHash(s.trie.Root())
 }
 
-func (s *StateDB) Trie() *trie.SecureTrie {
-	return s.trie
-}
-
-// Resets the trie and all siblings
-func (s *StateDB) Reset() {
-	s.trie.Reset()
-
-	// Reset all nested states
-	for _, stateObject := range s.stateObjects {
-		stateObject.Reset()
-	}
-
-	s.Empty()
-}
-
 // Syncs the trie and all siblings
 func (s *StateDB) Sync() {
 	// Sync all nested states

core/types/transaction.go

@@ -33,10 +33,6 @@ import (
 
 var ErrInvalidSig = errors.New("invalid v, r, s values")
 
-func IsContractAddr(addr []byte) bool {
-	return len(addr) == 0
-}
-
 type Transaction struct {
 	data txdata
 	// caches

core/vm/errors.go

@@ -25,20 +25,3 @@ import (
 
 var OutOfGasError = errors.New("Out of gas")
 var DepthError = fmt.Errorf("Max call depth exceeded (%d)", params.CallCreateDepth)
-
-type StackError struct {
-	req, has int
-}
-
-func StackErr(req, has int) StackError {
-	return StackError{req, has}
-}
-
-func (self StackError) Error() string {
-	return fmt.Sprintf("stack error! require %v, have %v", self.req, self.has)
-}
-
-func IsStackErr(err error) bool {
-	_, ok := err.(StackError)
-	return ok
-}