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authorobscuren <geffobscura@gmail.com>2014-01-24 03:16:52 +0800
committerobscuren <geffobscura@gmail.com>2014-01-24 03:16:52 +0800
commit477e8a7a73820ece05bbb990607a1919d3788960 (patch)
treec13d1d7f709f0934b54ef10377e671446d165db7 /transaction_pool.go
parent3616080db46931202003157bacf10748008bebc0 (diff)
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Rearrange packages
Diffstat (limited to 'transaction_pool.go')
-rw-r--r--transaction_pool.go177
1 files changed, 0 insertions, 177 deletions
diff --git a/transaction_pool.go b/transaction_pool.go
deleted file mode 100644
index b302931de..000000000
--- a/transaction_pool.go
+++ /dev/null
@@ -1,177 +0,0 @@
-package main
-
-import (
- "bytes"
- "container/list"
- "errors"
- "github.com/ethereum/ethutil-go"
- "github.com/ethereum/ethwire-go"
- "log"
- "math/big"
- "sync"
-)
-
-const (
- txPoolQueueSize = 50
-)
-
-func FindTx(pool *list.List, finder func(*ethutil.Transaction, *list.Element) bool) *ethutil.Transaction {
- for e := pool.Front(); e != nil; e = e.Next() {
- if tx, ok := e.Value.(*ethutil.Transaction); ok {
- if finder(tx, e) {
- return tx
- }
- }
- }
-
- return nil
-}
-
-// The tx pool a thread safe transaction pool handler. In order to
-// guarantee a non blocking pool we use a queue channel which can be
-// independently read without needing access to the actual pool. If the
-// pool is being drained or synced for whatever reason the transactions
-// will simple queue up and handled when the mutex is freed.
-type TxPool struct {
- server *Server
- // The mutex for accessing the Tx pool.
- mutex sync.Mutex
- // Queueing channel for reading and writing incoming
- // transactions to
- queueChan chan *ethutil.Transaction
- // Quiting channel
- quit chan bool
-
- pool *list.List
-}
-
-func NewTxPool(s *Server) *TxPool {
- return &TxPool{
- server: s,
- mutex: sync.Mutex{},
- pool: list.New(),
- queueChan: make(chan *ethutil.Transaction, txPoolQueueSize),
- quit: make(chan bool),
- }
-}
-
-// Blocking function. Don't use directly. Use QueueTransaction instead
-func (pool *TxPool) addTransaction(tx *ethutil.Transaction) {
- pool.mutex.Lock()
- pool.pool.PushBack(tx)
- pool.mutex.Unlock()
-
- // Broadcast the transaction to the rest of the peers
- pool.server.Broadcast(ethwire.MsgTxTy, tx.RlpEncode())
-}
-
-// Process transaction validates the Tx and processes funds from the
-// sender to the recipient.
-func (pool *TxPool) processTransaction(tx *ethutil.Transaction) error {
- // Get the last block so we can retrieve the sender and receiver from
- // the merkle trie
- block := pool.server.blockManager.bc.LastBlock
- // Something has gone horribly wrong if this happens
- if block == nil {
- return errors.New("No last block on the block chain")
- }
-
- var sender, receiver *ethutil.Ether
-
- // Get the sender
- data := block.State().Get(string(tx.Sender()))
- // If it doesn't exist create a new account. Of course trying to send funds
- // from this account will fail since it will hold 0 Wei
- if data == "" {
- sender = ethutil.NewEther(big.NewInt(0))
- } else {
- sender = ethutil.NewEtherFromData([]byte(data))
- }
- // Defer the update. Whatever happens it should be persisted
- defer block.State().Update(string(tx.Sender()), string(sender.RlpEncode()))
-
- // Make sure there's enough in the sender's account. Having insufficient
- // funds won't invalidate this transaction but simple ignores it.
- if sender.Amount.Cmp(tx.Value) < 0 {
- if Debug {
- log.Println("Insufficient amount in sender's account. Adding 1 ETH for debug")
- sender.Amount = ethutil.BigPow(10, 18)
- } else {
- return errors.New("Insufficient amount in sender's account")
- }
- }
-
- // Subtract the amount from the senders account
- sender.Amount.Sub(sender.Amount, tx.Value)
- // Increment the nonce making each tx valid only once to prevent replay
- // attacks
- sender.Nonce += 1
-
- // Get the receiver
- data = block.State().Get(tx.Recipient)
- // If the receiver doesn't exist yet, create a new account to which the
- // funds will be send.
- if data == "" {
- receiver = ethutil.NewEther(big.NewInt(0))
- } else {
- receiver = ethutil.NewEtherFromData([]byte(data))
- }
- // Defer the update
- defer block.State().Update(tx.Recipient, string(receiver.RlpEncode()))
-
- // Add the amount to receivers account which should conclude this transaction
- receiver.Amount.Add(receiver.Amount, tx.Value)
-
- return nil
-}
-
-func (pool *TxPool) queueHandler() {
-out:
- for {
- select {
- case tx := <-pool.queueChan:
- hash := tx.Hash()
- foundTx := FindTx(pool.pool, func(tx *ethutil.Transaction, e *list.Element) bool {
- return bytes.Compare(tx.Hash(), hash) == 0
- })
-
- if foundTx != nil {
- break
- }
-
- // Process the transaction
- err := pool.processTransaction(tx)
- if err != nil {
- log.Println("Error processing Tx", err)
- } else {
- // Call blocking version. At this point it
- // doesn't matter since this is a goroutine
- pool.addTransaction(tx)
- }
- case <-pool.quit:
- break out
- }
- }
-}
-
-func (pool *TxPool) QueueTransaction(tx *ethutil.Transaction) {
- pool.queueChan <- tx
-}
-
-func (pool *TxPool) Flush() {
- pool.mutex.Lock()
-
- defer pool.mutex.Unlock()
-}
-
-func (pool *TxPool) Start() {
- go pool.queueHandler()
-}
-
-func (pool *TxPool) Stop() {
- log.Println("[TXP] Stopping...")
-
- close(pool.quit)
-
- pool.Flush()
-}