plugeth/eth/handler_test.go

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2016-04-14 16:18:24 +00:00
// 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 eth
import (
"math/big"
"sort"
"sync"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth/downloader"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
)
var (
// testKey is a private key to use for funding a tester account.
testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
// testAddr is the Ethereum address of the tester account.
testAddr = crypto.PubkeyToAddress(testKey.PublicKey)
)
// testTxPool is a mock transaction pool that blindly accepts all transactions.
// Its goal is to get around setting up a valid statedb for the balance and nonce
// checks.
type testTxPool struct {
pool map[common.Hash]*types.Transaction // Hash map of collected transactions
txFeed event.Feed // Notification feed to allow waiting for inclusion
lock sync.RWMutex // Protects the transaction pool
}
// newTestTxPool creates a mock transaction pool.
func newTestTxPool() *testTxPool {
return &testTxPool{
pool: make(map[common.Hash]*types.Transaction),
}
}
// Has returns an indicator whether txpool has a transaction
// cached with the given hash.
func (p *testTxPool) Has(hash common.Hash) bool {
p.lock.Lock()
defer p.lock.Unlock()
return p.pool[hash] != nil
}
// Get retrieves the transaction from local txpool with given
// tx hash.
func (p *testTxPool) Get(hash common.Hash) *types.Transaction {
p.lock.Lock()
defer p.lock.Unlock()
return p.pool[hash]
}
// AddRemotes appends a batch of transactions to the pool, and notifies any
// listeners if the addition channel is non nil
func (p *testTxPool) AddRemotes(txs []*types.Transaction) []error {
p.lock.Lock()
defer p.lock.Unlock()
for _, tx := range txs {
p.pool[tx.Hash()] = tx
}
p.txFeed.Send(core.NewTxsEvent{Txs: txs})
return make([]error, len(txs))
}
// Pending returns all the transactions known to the pool
func (p *testTxPool) Pending(enforceTips bool) map[common.Address]types.Transactions {
p.lock.RLock()
defer p.lock.RUnlock()
batches := make(map[common.Address]types.Transactions)
for _, tx := range p.pool {
from, _ := types.Sender(types.HomesteadSigner{}, tx)
batches[from] = append(batches[from], tx)
}
for _, batch := range batches {
sort.Sort(types.TxByNonce(batch))
}
return batches
}
// SubscribeNewTxsEvent should return an event subscription of NewTxsEvent and
// send events to the given channel.
func (p *testTxPool) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
return p.txFeed.Subscribe(ch)
}
// testHandler is a live implementation of the Ethereum protocol handler, just
// preinitialized with some sane testing defaults and the transaction pool mocked
// out.
type testHandler struct {
db ethdb.Database
chain *core.BlockChain
txpool *testTxPool
handler *handler
}
// newTestHandler creates a new handler for testing purposes with no blocks.
func newTestHandler() *testHandler {
return newTestHandlerWithBlocks(0)
}
// newTestHandlerWithBlocks creates a new handler for testing purposes, with a
// given number of initial blocks.
func newTestHandlerWithBlocks(blocks int) *testHandler {
// Create a database pre-initialize with a genesis block
db := rawdb.NewMemoryDatabase()
(&core.Genesis{
Config: params.TestChainConfig,
Alloc: core.GenesisAlloc{testAddr: {Balance: big.NewInt(1000000)}},
}).MustCommit(db)
chain, _ := core.NewBlockChain(db, nil, params.TestChainConfig, ethash.NewFaker(), vm.Config{}, nil, nil)
bs, _ := core.GenerateChain(params.TestChainConfig, chain.Genesis(), ethash.NewFaker(), db, blocks, nil)
if _, err := chain.InsertChain(bs); err != nil {
panic(err)
}
txpool := newTestTxPool()
handler, _ := newHandler(&handlerConfig{
Database: db,
Chain: chain,
TxPool: txpool,
Network: 1,
Sync: downloader.FastSync,
BloomCache: 1,
})
handler.Start(1000)
return &testHandler{
db: db,
chain: chain,
txpool: txpool,
handler: handler,
}
}
// close tears down the handler and all its internal constructs.
func (b *testHandler) close() {
b.handler.Stop()
b.chain.Stop()
}