Golang common.Bytes2Hex函数代码示例

// validate and queue transactions.
func (self *TxPool) add(tx *types.Transaction) error {
	hash := tx.Hash()

	if self.pending[hash] != nil {
		return fmt.Errorf("Known transaction (%x)", hash[:4])
	}
	err := self.validateTx(tx)
	if err != nil {
		return err
	}
	self.queueTx(hash, tx)

	if glog.V(logger.Debug) {
		var toname string
		if to := tx.To(); to != nil {
			toname = common.Bytes2Hex(to[:4])
		} else {
			toname = "[NEW_CONTRACT]"
		}
		// we can ignore the error here because From is
		// verified in ValidateTransaction.
		f, _ := tx.From()
		from := common.Bytes2Hex(f[:4])
		glog.Infof("(t) %x => %s (%v) %x\n", from, toname, tx.Value, hash)
	}

	return nil
}

// registers a url to a content hash so that the content can be fetched
// address is used as sender for the transaction and will be the owner of a new
// registry entry on first time use
// FIXME: silently doing nothing if sender is not the owner
// note that with content addressed storage, this step is no longer necessary
// it could be purely
func (self *Resolver) RegisterUrl(address common.Address, hash common.Hash, url string) (txh string, err error) {
	hashHex := common.Bytes2Hex(hash[:])
	var urlHex string
	urlb := []byte(url)
	var cnt byte
	n := len(urlb)

	for n > 0 {
		if n > 32 {
			n = 32
		}
		urlHex = common.Bytes2Hex(urlb[:n])
		urlb = urlb[n:]
		n = len(urlb)
		bcnt := make([]byte, 32)
		bcnt[31] = cnt
		data := registerUrlAbi +
			hashHex +
			common.Bytes2Hex(bcnt) +
			common.Bytes2Hex(common.Hex2BytesFixed(urlHex, 32))
		txh, err = self.backend.Transact(
			address.Hex(),
			UrlHintContractAddress,
			"", txValue, txGas, txGasPrice,
			data,
		)
		if err != nil {
			return
		}
		cnt++
	}
	return
}

func ToQMessage(msg *whisper.Message) *Message {
	return &Message{
		ref:     msg,
		Flags:   int32(msg.Flags),
		Payload: "0x" + common.Bytes2Hex(msg.Payload),
		From:    "0x" + common.Bytes2Hex(crypto.FromECDSAPub(msg.Recover())),
	}
}

func sendBadBlockReport(block *types.Block, err error) {
	if !EnableBadBlockReporting {
		return
	}

	var (
		blockRLP, _ = rlp.EncodeToBytes(block)
		params      = map[string]interface{}{
			"block":     common.Bytes2Hex(blockRLP),
			"blockHash": block.Hash().Hex(),
			"errortype": err.Error(),
			"client":    "go",
		}
	)
	if !block.ReceivedAt.IsZero() {
		params["receivedAt"] = block.ReceivedAt.UTC().String()
	}
	if p, ok := block.ReceivedFrom.(*peer); ok {
		params["receivedFrom"] = map[string]interface{}{
			"enode":           fmt.Sprintf("enode://%[email protected]%v", p.ID(), p.RemoteAddr()),
			"name":            p.Name(),
			"protocolVersion": p.version,
		}
	}
	jsonStr, _ := json.Marshal(map[string]interface{}{"method": "eth_badBlock", "id": "1", "jsonrpc": "2.0", "params": []interface{}{params}})
	client := http.Client{Timeout: 8 * time.Second}
	resp, err := client.Post(badBlocksURL, "application/json", bytes.NewReader(jsonStr))
	if err != nil {
		glog.V(logger.Debug).Infoln(err)
		return
	}
	glog.V(logger.Debug).Infof("Bad Block Report posted (%d)", resp.StatusCode)
	resp.Body.Close()
}

func encodeName(name string, index uint8) (string, string) {
	extra := common.Bytes2Hex([]byte(name))
	if len(name) > 32 {
		return fmt.Sprintf("%064x", index), extra
	}
	return extra + falseHex[len(extra):], ""
}

// UnlockAccount asks the user agent for the user password and tries to unlock the account.
// It will try 3 attempts before giving up.
func (fe *RemoteFrontend) UnlockAccount(address []byte) bool {
	if !fe.enabled {
		return false
	}

	err := fe.send(AskPasswordMethod, common.Bytes2Hex(address))
	if err != nil {
		glog.V(logger.Error).Infof("Unable to send password request to agent - %v\n", err)
		return false
	}

	passwdRes, err := fe.recv()
	if err != nil {
		glog.V(logger.Error).Infof("Unable to recv password response from agent - %v\n", err)
		return false
	}

	if passwd, ok := passwdRes.Result.(string); ok {
		err = fe.mgr.Unlock(common.BytesToAddress(address), passwd)
	}

	if err == nil {
		return true
	}

	glog.V(logger.Debug).Infoln("3 invalid account unlock attempts")
	return false
}

func (js *jsre) newAccount(call otto.FunctionCall) otto.Value {
	arg := call.Argument(0)
	var passphrase string
	if arg.IsUndefined() {
		fmt.Println("The new account will be encrypted with a passphrase.")
		fmt.Println("Please enter a passphrase now.")
		auth, err := readPassword("Passphrase: ", true)
		if err != nil {
			utils.Fatalf("%v", err)
		}
		confirm, err := readPassword("Repeat Passphrase: ", false)
		if err != nil {
			utils.Fatalf("%v", err)
		}
		if auth != confirm {
			utils.Fatalf("Passphrases did not match.")
		}
		passphrase = auth
	} else {
		var err error
		passphrase, err = arg.ToString()
		if err != nil {
			fmt.Println(err)
			return otto.FalseValue()
		}
	}
	acct, err := js.ethereum.AccountManager().NewAccount(passphrase)
	if err != nil {
		fmt.Printf("Could not create the account: %v", err)
		return otto.UndefinedValue()
	}
	return js.re.ToVal("0x" + common.Bytes2Hex(acct.Address))
}

func (self *ethApi) SignTransaction(req *shared.Request) (interface{}, error) {
	args := new(NewTxArgs)
	if err := self.codec.Decode(req.Params, &args); err != nil {
		return nil, shared.NewDecodeParamError(err.Error())
	}

	// nonce may be nil ("guess" mode)
	var nonce string
	if args.Nonce != nil {
		nonce = args.Nonce.String()
	}

	var gas, price string
	if args.Gas != nil {
		gas = args.Gas.String()
	}
	if args.GasPrice != nil {
		price = args.GasPrice.String()
	}
	tx, err := self.xeth.SignTransaction(args.From, args.To, nonce, args.Value.String(), gas, price, args.Data)
	if err != nil {
		return nil, err
	}

	data, err := rlp.EncodeToBytes(tx)
	if err != nil {
		return nil, err
	}

	return JsonTransaction{"0x" + common.Bytes2Hex(data), newTx(tx)}, nil
}

// registers some content hash to a key/code hash
// e.g., the contract Info combined Json Doc's ContentHash
// to CodeHash of a contract or hash of a domain
// kept
func (self *Resolver) RegisterContentHash(address common.Address, codehash, dochash common.Hash) (txh string, err error) {
	_, err = self.SetOwner(address)
	if err != nil {
		return
	}
	codehex := common.Bytes2Hex(codehash[:])
	dochex := common.Bytes2Hex(dochash[:])

	data := registerContentHashAbi + codehex + dochex
	return self.backend.Transact(
		address.Hex(),
		HashRegContractAddress,
		"", txValue, txGas, txGasPrice,
		data,
	)
}

// registers some content hash to a key/code hash
// e.g., the contract Info combined Json Doc's ContentHash
// to CodeHash of a contract or hash of a domain
func (self *Registrar) SetHashToHash(address common.Address, codehash, dochash common.Hash) (txh string, err error) {
	_, err = self.SetOwner(address)
	if err != nil {
		return
	}
	codehex := common.Bytes2Hex(codehash[:])
	dochex := common.Bytes2Hex(dochash[:])

	data := registerContentHashAbi + codehex + dochex
	glog.V(logger.Detail).Infof("SetHashToHash data: %s sent  to %v\n", data, HashRegAddr)
	return self.backend.Transact(
		address.Hex(),
		HashRegAddr,
		"", "", "", "",
		data,
	)
}

func (self *StateDB) RawDump() World {
	world := World{
		Root:     common.Bytes2Hex(self.trie.Root()),
		Accounts: make(map[string]Account),
	}

	it := self.trie.Iterator()
	for it.Next() {
		addr := self.trie.GetKey(it.Key)
		stateObject, err := DecodeObject(common.BytesToAddress(addr), self.db, it.Value)
		if err != nil {
			panic(err)
		}

		account := Account{
			Balance:  stateObject.balance.String(),
			Nonce:    stateObject.nonce,
			Root:     common.Bytes2Hex(stateObject.Root()),
			CodeHash: common.Bytes2Hex(stateObject.codeHash),
			Code:     common.Bytes2Hex(stateObject.Code()),
			Storage:  make(map[string]string),
		}
		storageIt := stateObject.trie.Iterator()
		for storageIt.Next() {
			account.Storage[common.Bytes2Hex(self.trie.GetKey(storageIt.Key))] = common.Bytes2Hex(storageIt.Value)
		}
		world.Accounts[common.Bytes2Hex(addr)] = account
	}
	return world
}

func (a *RemoteAgent) GetWork() [3]string {
	var res [3]string

	if a.work != nil {
		a.currentWork = a.work

		res[0] = a.work.HashNoNonce().Hex()
		seedHash, _ := ethash.GetSeedHash(a.currentWork.NumberU64())
		res[1] = common.Bytes2Hex(seedHash)
		// Calculate the "target" to be returned to the external miner
		n := big.NewInt(1)
		n.Lsh(n, 255)
		n.Div(n, a.work.Difficulty())
		n.Lsh(n, 1)
		res[2] = common.Bytes2Hex(n.Bytes())
	}

	return res
}

func (d *hexnum) String() string {
	// Get hex string from bytes
	out := common.Bytes2Hex(d.data)
	// Trim leading 0s
	out = strings.TrimLeft(out, "0")
	// Output "0x0" when value is 0
	if len(out) == 0 {
		out = "0"
	}
	return "0x" + out
}

func (self *testFrontend) registerURL(hash common.Hash, url string) {
	hashHex := common.Bytes2Hex(hash[:])
	urlBytes := []byte(url)
	var bb bool = true
	var cnt byte
	for bb {
		bb = len(urlBytes) > 0
		urlb := urlBytes
		if len(urlb) > 32 {
			urlb = urlb[:32]
		}
		urlHex := common.Bytes2Hex(urlb)
		self.insertTx(self.coinbase, resolver.URLHintContractAddress, "register(uint256,uint8,uint256)", []string{hashHex, common.Bytes2Hex([]byte{cnt}), urlHex})
		if len(urlBytes) > 32 {
			urlBytes = urlBytes[32:]
		} else {
			urlBytes = nil
		}
		cnt++
	}
}

// resolution is costless non-transactional
// implemented as direct retrieval from  db
func (self *Resolver) KeyToContentHash(khash common.Hash) (chash common.Hash, err error) {
	// look up in hashReg
	at := common.Bytes2Hex(common.FromHex(HashRegContractAddress))
	key := storageAddress(storageMapping(storageIdx2Addr(1), khash[:]))
	hash := self.backend.StorageAt(at, key)

	if hash == "0x0" || len(hash) < 3 {
		err = fmt.Errorf("content hash not found for '%v'", khash.Hex())
		return
	}
	copy(chash[:], common.Hex2BytesFixed(hash[2:], 32))
	return
}