Golang factoid.Transaction類代碼示例

// This is the Baby of Asset tracking!  We get the current height of our block
// and we go through each entry, unmarshalling it and building a "block".  We
// then process that block.
//
// We process transactions in our chain, and maintain a balance of our assets.
//
func (fs *AssetState) LoadState() error {

	// First we need to build our list of blocks going back.
	var blklist []factom.EBlock

	// Get me a chain head...
	blkmr, err := factom.GetChainHead(hex.EncodeToString(fs.ChainID()))
	if err != nil {
		return err
	}
	blk, err := factom.GetEBlock(blkmr.ChainHead)

	for {
		if blk.Header.BlockSequenceNumber < fs.nextblockheight {
			break
		}
		blklist = append(blklist, *blk)
		if blk.Header.BlockSequenceNumber == 0 {
			break
		}
		nblk, err := factom.GetEBlock(blk.Header.PrevKeyMR)
		if err != nil {
			fmt.Println("Error Reading Entry blocks")
			time.Sleep(time.Second)
			continue
		}
		blk = nblk
	}

	// Now process blocks forward

	for i := len(blklist) - 1; i >= 0; i-- {
		for _, entry := range blklist[i].EntryList {
			transEntry, err := factom.GetEntry(entry.EntryHash)
			t := new(fct.Transaction)
			transdata, err := hex.DecodeString(transEntry.Content)
			if err != nil {
				continue
			} // Ignore bad entries.
			err = t.UnmarshalBinary(transdata)
			if err != nil {
				continue
			} // Ignore bad entries.
			fs.AddTransaction(t)
		}
	}

	return nil
}

// New Transaction:  key --
// We create a new transaction, and track it with the user supplied key.  The
// user can then use this key to make subsequent calls to add inputs, outputs,
// and to sign. Then they can submit the transaction.
//
// When the transaction is submitted, we clear it from our working memory.
// Multiple transactions can be under construction at one time, but they need
// their own keys. Once a transaction is either submitted or deleted, the key
// can be reused.
func (Import) Execute(state IState, args []string) error {

	if len(args) != 3 {
		return fmt.Errorf("Invalid Parameters")
	}
	key := args[1]
	filename := args[2]

	if _, err := os.Stat(filename); err != nil {
		return fmt.Errorf("Could not find the input file %s", filename)
	}

	{ // Doing a bit of variable scope management here, since I want t later.
		t := state.GetFS().GetDB().GetRaw([]byte(fct.DB_BUILD_TRANS), []byte(key))
		if t != nil {
			return fmt.Errorf("That transaction already exists.  Specify a new one, or delete this one.")
		}
	}

	data, err := ioutil.ReadFile(filename)
	var hexdata []byte
	for _, b := range data {
		if b > 32 {
			hexdata = append(hexdata, b)
		}
	}

	bdata, err := hex.DecodeString(string(hexdata))
	if err != nil {
		return err
	}

	t := new(fct.Transaction)
	err = t.UnmarshalBinary(bdata)
	if err != nil {
		return err
	}

	state.GetFS().GetDB().PutRaw([]byte(fct.DB_BUILD_TRANS), []byte(key), t)

	fmt.Println("Transaction", filename, "has been imported")
	return nil
}

// This routine generates the Coinbase.  This is a fixed amount to be
// paid to the federated servers.
//
// Currently we are paying just a few fixed addresses.
//
func GetCoinbase(ftime uint64) fct.ITransaction {

	if false && adrs == nil {
		var w wallet.ISCWallet
		w = new(wallet.SCWallet)
		w.Init()

		adrs = make([]fct.IAddress, addressCnt)
		for i := 0; i < addressCnt; i++ {
			adr, _ := w.GenerateFctAddress([]byte("adr"+string(i)), 1, 1)
			adrs[i] = adr
		}
	}

	coinbase := new(fct.Transaction)
	coinbase.SetMilliTimestamp(ftime)

	for _, adr := range adrs {
		coinbase.AddOutput(adr, amount) // add specified amount
	}

	return coinbase
}

// Run a simulation of Transactions and blocks designed to test a pseudo random transaction set.
// If randomize = 0, then we will use the clock to seed the random number generator, and print the
// 64 bit seed used.  If randomize is set to some value, we use that vaule (allowing us to repeat
// tests if we like.
func Test_create_genesis_FactoidState(test *testing.T) {
	randomize := int64(0)
	numBlocks := 5
	numTransactions := 2 // Maximum Transactions
	maxIn := 1
	maxOut := 1
	if testing.Short() {
		fmt.Print("\nDoing Short Tests\n")
		numBlocks = 5
		numTransactions = 20
		maxIn = 5
		maxOut = 5
	}

	if randomize == 0 {
		randomize = time.Now().UnixNano()
		rand.Seed(randomize)
		randomize = rand.Int63()
		rand.Seed(randomize)
	} else {
		rand.Seed(randomize)
	}

	fmt.Println("Randomize Seed Used: ", randomize)

	cp.CP.AddUpdate(
		"Test Parms",
		"status", // Category
		fmt.Sprintf("Number of Blocks %d Max number Transactions %d",
			numBlocks, numTransactions),
		fmt.Sprintf("Randomize Seed: %v", randomize),
		0)

	// Use Bolt DB
	if !testing.Short() {
		fs.SetDB(new(database.MapDB))
		fs.GetDB().Init()
		db := stateinit.GetDatabase("./fct_test.db")
		fs.GetDB().SetPersist(db)
		fs.GetDB().SetBacker(db)

		fs.GetDB().DoNotPersist(fct.DB_F_BALANCES)
		fs.GetDB().DoNotPersist(fct.DB_EC_BALANCES)
		fs.GetDB().DoNotPersist(fct.DB_BUILD_TRANS)
		fs.GetDB().DoNotCache(fct.DB_FACTOID_BLOCKS)
		fs.GetDB().DoNotCache(fct.DB_BAD_TRANS)
		fs.GetDB().DoNotCache(fct.DB_TRANSACTIONS)
	} else {
		fs.SetDB(new(database.MapDB))
		fs.GetDB().Init()
	}
	// Make the coinbase very generous
	block.UpdateAmount(10000000)

	// Set the price for Factoids
	fs.SetFactoshisPerEC(100000)
	err := fs.LoadState()
	if err != nil {
		fmt.Println("Faid to initialize: ", err)
		os.Exit(1)
	}
	pre := fs.GetTransactionBlock(fs.GetCurrentBlock().GetPrevKeyMR())
	if !bytes.Equal(pre.GetHash().Bytes(), fs.GetCurrentBlock().GetPrevKeyMR().Bytes()) {
		fmt.Printf("Something is ill!")
		test.Fail()
		return
	}

	// Print the Genesis Block.  If we don't know the past, then print it.
	past := fs.GetTransactionBlock(pre.GetPrevKeyMR())
	if past == nil {
		for _, trans := range pre.GetTransactions() {
			PrtTrans(trans)
		}
	}

	if err != nil {
		fct.Prtln("Failed to load:", err)
		test.Fail()
		return
	}

	var max, min, maxblk int
	min = 100000
	// Create a number of blocks (i)
	for i := 0; i < numBlocks; i++ {

		fmt.Println("Block", fs.GetCurrentBlock().GetDBHeight())

		PrtTrans(fs.GetCurrentBlock().GetTransactions()[0])

		thisRunLimit := (rand.Int() % numTransactions) + 1

		cp.CP.AddUpdate(
			"This Block",
			"status", // Category
//.........這裏部分代碼省略.........

// UnmarshalBinary assumes that the Binary is all good.  We do error
// out if there isn't enough data, or the transaction is too large.
func (b *FBlock) UnmarshalBinaryData(data []byte) (newdata []byte, err error) {

	// To catch memory errors, I capture the panic and turn it into
	// a reported error.
	defer func() {
		if r := recover(); r != nil {
			err = fmt.Errorf("Error unmarshalling transaction: %v", r)
		}
	}()

	// To capture the panic, my code needs to be in a function.  So I'm
	// creating one here, and call it at the end of this function.
	if bytes.Compare(data[:fct.ADDRESS_LENGTH], fct.FACTOID_CHAINID[:]) != 0 {
		return nil, fmt.Errorf("Block does not begin with the Factoid ChainID")
	}
	data = data[32:]

	b.BodyMR = new(fct.Hash)
	data, err = b.BodyMR.UnmarshalBinaryData(data)
	if err != nil {
		return nil, err
	}

	b.PrevKeyMR = new(fct.Hash)
	data, err = b.PrevKeyMR.UnmarshalBinaryData(data)
	if err != nil {
		return nil, err
	}

	b.PrevLedgerKeyMR = new(fct.Hash)
	data, err = b.PrevLedgerKeyMR.UnmarshalBinaryData(data)
	if err != nil {
		return nil, err
	}

	b.ExchRate, data = binary.BigEndian.Uint64(data[0:8]), data[8:]
	b.DBHeight, data = binary.BigEndian.Uint32(data[0:4]), data[4:]

	skip, data := fct.DecodeVarInt(data) // Skip the Expansion Header, if any, since
	data = data[skip:]                   // we don't know what to do with it.

	cnt, data := binary.BigEndian.Uint32(data[0:4]), data[4:]

	data = data[4:] // Just skip the size... We don't really need it.

	b.Transactions = make([]fct.ITransaction, cnt, cnt)
	for i, _ := range b.endOfPeriod {
		b.endOfPeriod[i] = 0
	}
	var periodMark = 0
	for i := uint32(0); i < cnt; i++ {

		for data[0] == fct.MARKER {
			b.endOfPeriod[periodMark] = int(i)
			data = data[1:]
			periodMark++
		}

		trans := new(fct.Transaction)
		data, err = trans.UnmarshalBinaryData(data)
		if err != nil {
			return nil, fmt.Errorf("Failed to unmarshal a transaction in block.\n" + err.Error())
		}
		b.Transactions[i] = trans
	}

	return data, nil

}

func (w *SCWallet) CreateTransaction(time uint64) fct.ITransaction {
	t := new(fct.Transaction)
	t.SetMilliTimestamp(time)
	return t
}

func Test_create_genesis_FactoidState(test *testing.T) {
	fmt.Print("\033[2J")

	numBlocks := 5000
	numTransactions := 500
	maxIn := 5
	maxOut := 20
	if testing.Short() {
		fmt.Print("\nDoing Short Tests\n")
		numBlocks = 5
		numTransactions = 20
		maxIn = 5
		maxOut = 5
	}

	// Use Bolt DB
	if !testing.Short() {
		fs.SetDB(new(database.MapDB))
		fs.GetDB().Init()
		db := stateinit.GetDatabase("/tmp/fct_test.db")
		fs.GetDB().SetPersist(db)
		fs.GetDB().SetBacker(db)

		fs.GetDB().DoNotPersist(fct.DB_F_BALANCES)
		fs.GetDB().DoNotPersist(fct.DB_EC_BALANCES)
		fs.GetDB().DoNotPersist(fct.DB_BUILD_TRANS)
		fs.GetDB().DoNotCache(fct.DB_FACTOID_BLOCKS)
		fs.GetDB().DoNotCache(fct.DB_BAD_TRANS)
		fs.GetDB().DoNotCache(fct.DB_TRANSACTIONS)
	} else {
		fs.SetDB(new(database.MapDB))
		fs.GetDB().Init()
	}
	// Set the price for Factoids
	fs.SetFactoshisPerEC(100000)
	err := fs.LoadState()
	if err != nil {
		fct.Prtln("Failed to load:", err)
		test.Fail()
		return
	}
	fs.ProcessEndOfBlock()

	// Make the coinbase very generous
	block.UpdateAmount(100000000000)

	var cnt, max, min, maxblk int
	min = 100000
	// Create a number of blocks (i)
	for i := 0; i < numBlocks; i++ {

		periodMark := 1
		// Create a new block
		for j := cnt; cnt < j+numTransactions; { // Execute for some number RECORDED transactions

			if periodMark <= 10 && cnt%(numTransactions/10) == 0 {
				fs.EndOfPeriod(periodMark)
				periodMark++
			}

			tx := fs.newTransaction(maxIn, maxOut)

			addtest := true
			flip := rand.Int() % 100
			if rand.Int()%100 < 5 { // Mess up the timestamp on 5 percent of the transactions
				addtest = false
				blkts := uint64(fs.GetCurrentBlock().GetCoinbaseTimestamp())
				if flip < 49 { // Flip a coin
					tx.SetMilliTimestamp(blkts - uint64(fct.TRANSACTION_PRIOR_LIMIT) - 1)
					fs.stats.errors["trans too early"] += 1
					fs.stats.full["trans too early"] = "trans too early"
				} else {
					tx.SetMilliTimestamp(blkts + uint64(fct.TRANSACTION_POST_LIMIT) + 1)
					fs.stats.errors["trans too late"] += 1
					fs.stats.full["trans too late"] = "trans too late"
				}
				fs.twallet.SignInputs(tx)
			}

			// Test Marshal/UnMarshal
			m, err := tx.MarshalBinary()
			if err != nil {
				fmt.Println("\n Failed to Marshal: ", err)
				test.Fail()
				return
			}
			if len(m) > max {
				fmt.Print("\033[33;0H")
				max = len(m)
				fmt.Println("Max Transaction", cnt, "is", len(m), "Bytes long. ",
					len(tx.GetInputs()), "inputs and",
					len(tx.GetOutputs()), "outputs and",
					len(tx.GetECOutputs()), "ecoutputs                       ")
				fmt.Print("\033[41;0H")
			}
			if len(m) < min {
				fmt.Print("\033[34;0H")
				min = len(m)
				fmt.Println("Min Transaction", cnt, "is", len(m), "Bytes long. ",
					len(tx.GetInputs()), "inputs and",
//.........這裏部分代碼省略.........