Golang ethutil.Encode函數代碼示例

func NewBlockChain(ethereum EthManager) *BlockChain {
	bc := &BlockChain{}
	bc.genesisBlock = NewBlockFromData(ethutil.Encode(Genesis))

	bc.setLastBlock()

	return bc
}

// State object encoding methods
func (c *StateObject) RlpEncode() []byte {
	var root interface{}
	if c.State != nil {
		root = c.State.Trie.Root
	} else {
		root = ""
	}

	return ethutil.Encode([]interface{}{c.Nonce, c.Balance, root, ethcrypto.Sha3Bin(c.Code)})
}

func (tx *Transaction) Hash() []byte {
	data := make([]interface{}, len(tx.Data))
	for i, val := range tx.Data {
		data[i] = val
	}

	preEnc := []interface{}{
		tx.Nonce,
		tx.Recipient,
		tx.Value,
		data,
	}

	return ethutil.Sha3Bin(ethutil.Encode(preEnc))
}

func MakeContract(tx *Transaction, state *State) *Contract {
	// Create contract if there's no recipient
	if tx.IsContract() {
		addr := tx.Hash()[12:]

		value := tx.Value
		contract := NewContract(value, []byte(""))
		state.trie.Update(string(addr), string(contract.RlpEncode()))
		for i, val := range tx.Data {
			if len(val) > 0 {
				bytNum := ethutil.BigToBytes(big.NewInt(int64(i)), 256)
				contract.state.trie.Update(string(bytNum), string(ethutil.Encode(val)))
			}
		}
		state.trie.Update(string(addr), string(contract.RlpEncode()))

		return contract
	}

	return nil
}

func (i *Console) ParseInput(input string) bool {
	scanner := bufio.NewScanner(strings.NewReader(input))
	scanner.Split(bufio.ScanWords)

	count := 0
	var tokens []string
	for scanner.Scan() {
		count++
		tokens = append(tokens, scanner.Text())
	}
	if err := scanner.Err(); err != nil {
		fmt.Fprintln(os.Stderr, "reading input:", err)
	}

	if len(tokens) == 0 {
		return true
	}

	err := i.ValidateInput(tokens[0], count-1)
	if err != nil {
		fmt.Println(err)
	} else {
		switch tokens[0] {
		case "update":
			i.trie.Update(tokens[1], tokens[2])

			i.PrintRoot()
		case "get":
			fmt.Println(i.trie.Get(tokens[1]))
		case "root":
			i.PrintRoot()
		case "rawroot":
			fmt.Println(i.trie.Root)
		case "print":
			i.db.Print()
		case "dag":
			fmt.Println(ethchain.DaggerVerify(ethutil.Big(tokens[1]), // hash
				ethutil.BigPow(2, 36),   // diff
				ethutil.Big(tokens[2]))) // nonce
		case "decode":
			value := ethutil.NewValueFromBytes([]byte(tokens[1]))
			fmt.Println(value)
		case "getaddr":
			encoded, _ := hex.DecodeString(tokens[1])
			addr := i.ethereum.BlockManager.BlockChain().CurrentBlock.GetAddr(encoded)
			fmt.Println("addr:", addr)
		case "block":
			encoded, _ := hex.DecodeString(tokens[1])
			block := i.ethereum.BlockManager.BlockChain().GetBlock(encoded)
			fmt.Println(block)
		case "say":
			i.ethereum.Broadcast(ethwire.MsgTalkTy, []interface{}{tokens[1]})
		case "addp":
			i.ethereum.ConnectToPeer(tokens[1])
		case "pcount":
			fmt.Println("peers:", i.ethereum.Peers().Len())
		case "encode":
			fmt.Printf("%q\n", ethutil.Encode(tokens[1]))
		case "tx":
			recipient, err := hex.DecodeString(tokens[1])
			if err != nil {
				fmt.Println("recipient err:", err)
			} else {
				tx := ethchain.NewTransaction(recipient, ethutil.Big(tokens[2]), []string{""})
				data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
				keyRing := ethutil.NewValueFromBytes(data)
				tx.Sign(keyRing.Get(0).Bytes())
				fmt.Printf("%x\n", tx.Hash())
				i.ethereum.TxPool.QueueTransaction(tx)
			}

		case "gettx":
			addr, _ := hex.DecodeString(tokens[1])
			data, _ := ethutil.Config.Db.Get(addr)
			if len(data) != 0 {
				decoder := ethutil.NewValueFromBytes(data)
				fmt.Println(decoder)
			} else {
				fmt.Println("gettx: tx not found")
			}
		case "contract":
			contract := ethchain.NewTransaction([]byte{}, ethutil.Big(tokens[1]), []string{"PUSH", "1234"})
			fmt.Printf("%x\n", contract.Hash())

			i.ethereum.TxPool.QueueTransaction(contract)
		case "exit", "quit", "q":
			return false
		case "help":
			fmt.Printf("COMMANDS:\n" +
				"\033[1m= DB =\033[0m\n" +
				"update KEY VALUE - Updates/Creates a new value for the given key\n" +
				"get KEY - Retrieves the given key\n" +
				"root - Prints the hex encoded merkle root\n" +
				"rawroot - Prints the raw merkle root\n" +
				"block HASH - Prints the block\n" +
				"getaddr ADDR - Prints the account associated with the address\n" +
				"\033[1m= Dagger =\033[0m\n" +
				"dag HASH NONCE - Verifies a nonce with the given hash with dagger\n" +
				"\033[1m= Encoding =\033[0m\n" +
				"decode STR\n" +
//.........這裏部分代碼省略.........

func (a *Account) RlpEncode() []byte {
	return ethutil.Encode([]interface{}{a.Amount, a.Nonce})
}

package ethchain

import (
	"github.com/ethereum/eth-go/ethutil"
	"math/big"
)

/*
 * This is the special genesis block.
 */

var ZeroHash256 = make([]byte, 32)
var ZeroHash160 = make([]byte, 20)
var EmptyShaList = ethutil.Sha3Bin(ethutil.Encode([]interface{}{}))

var GenesisHeader = []interface{}{
	// Previous hash (none)
	//"",
	ZeroHash256,
	// Sha of uncles
	ethutil.Sha3Bin(ethutil.Encode([]interface{}{})),
	// Coinbase
	ZeroHash160,
	// Root state
	"",
	// Sha of transactions
	//EmptyShaList,
	ethutil.Sha3Bin(ethutil.Encode([]interface{}{})),
	// Difficulty
	ethutil.BigPow(2, 22),
	// Time

func (bi *BlockInfo) RlpEncode() []byte {
	return ethutil.Encode([]interface{}{bi.Number, bi.Hash, bi.Parent})
}

func (block *Block) SetTransactions(txs []*Transaction) {
	block.transactions = txs

	block.TxSha = ethutil.Sha3Bin(ethutil.Encode(block.rlpTxs()))
}

func (block *Block) SetUncles(uncles []*Block) {
	block.Uncles = uncles

	// Sha of the concatenated uncles
	block.UncleSha = ethutil.Sha3Bin(ethutil.Encode(block.rlpUncles()))
}

func (block *Block) PrintHash() {
	fmt.Println(block)
	fmt.Println(ethutil.NewValue(ethutil.Encode([]interface{}{block.PrevHash, block.UncleSha, block.Coinbase, block.state.trie.Root, block.TxSha, block.Difficulty, block.Time, block.Extra, block.Nonce})))
}

func (block *Block) HashNoNonce() []byte {
	return ethutil.Sha3Bin(ethutil.Encode([]interface{}{block.PrevHash, block.UncleSha, block.Coinbase, block.state.trie.Root, block.TxSha, block.Difficulty, block.Time, block.Extra}))
}

func (block *Block) HashNoNonce() []byte {
	return ethcrypto.Sha3Bin(ethutil.Encode([]interface{}{block.PrevHash,
		block.UncleSha, block.Coinbase, block.state.Trie.Root,
		block.TxSha, block.Difficulty, block.Number, block.MinGasPrice,
		block.GasLimit, block.GasUsed, block.Time, block.Extra}))
}

func (c *Contract) RlpEncode() []byte {
	return ethutil.Encode([]interface{}{c.Amount, c.Nonce, c.state.trie.Root})
}