// NewInProcRPCClient will start a new RPC server for the given node and returns a client to interact with it. func NewInProcRPCClient(stack *node.Node) *inProcClient { server := rpc.NewServer() offered := stack.APIs() for _, api := range offered { server.RegisterName(api.Namespace, api.Service) } web3 := node.NewPublicWeb3API(stack) server.RegisterName("web3", web3) var ethereum *eth.Ethereum if err := stack.Service(ðereum); err == nil { net := eth.NewPublicNetAPI(stack.Server(), ethereum.NetVersion()) server.RegisterName("net", net) } else { glog.V(logger.Warn).Infof("%v\n", err) } buf := &buf{ requests: make(chan []byte), responses: make(chan []byte), } client := &inProcClient{ server: server, buf: buf, } go func() { server.ServeCodec(rpc.NewJSONCodec(client.buf)) }() return client }
func main() { // Parse and handle the command line flags flag.Parse() log15.Root().SetHandler(log15.LvlFilterHandler(log15.Lvl(*loglevelFlag), log15.StderrHandler)) datadir := *datadirFlag if datadir == "" { datadir = filepath.Join(os.Getenv("HOME"), ".etherapis") } if err := os.MkdirAll(datadir, 0700); err != nil { log15.Crit("Failed to create data directory: %v", err) return } // Assemble and start the Ethereum client log15.Info("Booting Ethereum client...") client, err := geth.New(datadir, geth.TestNet) if err != nil { log15.Crit("Failed to create Ethereum client", "error", err) return } if err := client.Start(); err != nil { log15.Crit("Failed to start Ethereum client", "error", err) return } api, err := client.Attach() if err != nil { log15.Crit("Failed to attach to node", "error", err) return } // Wait for network connectivity and monitor synchronization log15.Info("Searching for network peers...") server := client.Stack().Server() for len(server.Peers()) == 0 { time.Sleep(100 * time.Millisecond) } go monitorSync(api) // Make sure we're at least semi recent on the chain before continuing waitSync(*syncFlag, api) var eth *eth.Ethereum err = client.Stack().Service(ð) if err != nil { log15.Crit("Failed to fetch eth service", "error", err) return } contract, err := channels.Fetch(eth.ChainDb(), eth.EventMux(), eth.BlockChain()) if err != nil { log15.Crit("Failed to get contract", "error", err) return } // Depending on the flags, execute different things switch { case *signFlag != "": var message struct { Provider string Nonce uint64 Amount uint64 } if err := json.Unmarshal([]byte(*signFlag), &message); err != nil { log15.Crit("Failed to decode data", "error", err) return } fmt.Println(message) accounts, err := eth.AccountManager().Accounts() if err != nil { log15.Crit("Failed retrieving accounts", "err", err) } if len(accounts) == 0 { log15.Crit("Signing data requires at least one account", "len", len(accounts)) return } account := accounts[0] from := account.Address to := common.HexToAddress(message.Provider) hash := contract.Call("getHash", from, to, message.Nonce, message.Amount).([]byte) log15.Info("getting hash", "hash", common.ToHex(hash)) eth.AccountManager().Unlock(from, "") sig, err := eth.AccountManager().Sign(account, hash) if err != nil { log15.Crit("signing vailed", "err", err) return } log15.Info("generated signature", "sig", common.ToHex(sig)) return case *importFlag != "": // Account import, parse the provided .json file and ensure it's proper manager := eth.AccountManager() account, err := manager.Import(*importFlag, "") if err != nil { log15.Crit("Failed to import specified account", "path", *importFlag, "error", err) return } state, _ := eth.BlockChain().State() log15.Info("Account successfully imported", "account", fmt.Sprintf("0x%x", account.Address), "balance", state.GetBalance(account.Address)) return case *accountsFlag: // Account listing requested, print all accounts and balances accounts, err := eth.AccountManager().Accounts() if err != nil || len(accounts) == 0 { log15.Crit("Failed to retrieve account", "accounts", len(accounts), "error", err) return } state, _ := eth.BlockChain().State() for i, account := range accounts { balance := float64(new(big.Int).Div(state.GetBalance(account.Address), common.Finney).Int64()) / 1000 fmt.Printf("Account #%d: %f ether (http://testnet.etherscan.io/address/0x%x)\n", i, balance, account.Address) } return case *accGenFlag > 0: // We're generating and dumping demo accounts var nonce uint64 var bank accounts.Account if *accLiveFlag { // If we want to fund generated accounts, make sure we can accounts, err := eth.AccountManager().Accounts() if err != nil || len(accounts) == 0 { log15.Crit("Failed to retrieve funding account", "accounts", len(accounts), "error", err) return } bank = accounts[0] if err := eth.AccountManager().Unlock(bank.Address, "gophergala"); err != nil { log15.Crit("Failed to unlock funding account", "account", fmt.Sprintf("0x%x", bank.Address), "error", err) return } state, _ := eth.BlockChain().State() nonce = state.GetNonce(bank.Address) log15.Info("Funding demo accounts with", "bank", fmt.Sprintf("0x%x", bank.Address), "nonce", nonce) } // Start generating the actual accounts log15.Info("Generating demo accounts", "count", *accGenFlag) for i := 0; i < *accGenFlag; i++ { // Generate a new account account, err := eth.AccountManager().NewAccount("pass") if err != nil { log15.Crit("Failed to generate new account", "error", err) return } // Export it's private key keyPath := fmt.Sprintf("0x%x.key", account.Address) if err := eth.AccountManager().Export(keyPath, account.Address, "pass"); err != nil { log15.Crit("Failed to export account", "account", fmt.Sprintf("0x%x", account.Address), "error", err) return } // Clean up so it doesn't clutter out accounts if err := eth.AccountManager().DeleteAccount(account.Address, "pass"); err != nil { log15.Crit("Failed to delete account", "account", fmt.Sprintf("0x%x", account.Address), "error", err) return } // If we're just testing, stop here if !*accLiveFlag { log15.Info("Account generated and exported", "path", keyPath) continue } // Oh boy, live accounts, send some ether to it and upload to the faucet allowance := new(big.Int).Mul(big.NewInt(10), common.Ether) price := new(big.Int).Mul(big.NewInt(50), common.Shannon) tx := types.NewTransaction(nonce, account.Address, allowance, big.NewInt(21000), price, nil) sig, err := eth.AccountManager().Sign(bank, tx.SigHash().Bytes()) if err != nil { log15.Crit("Failed to sign funding transaction", "error", err) return } stx, err := tx.WithSignature(sig) if err != nil { log15.Crit("Failed to assemble funding transaction", "error", err) return } if err := eth.TxPool().Add(stx); err != nil { log15.Crit("Failed to execute transfer", "error", err) return } nonce++ log15.Info("Account successfully funded", "account", fmt.Sprintf("0x%x", account.Address)) // Upload the account to the faucet server key, err := ioutil.ReadFile(keyPath) if err != nil { log15.Crit("Failed to load private key", "error", err) return } res, err := http.Get("https://etherapis.appspot.com/faucet/fund?key=" + string(key)) if err != nil { log15.Crit("Failed to upload private key to faucet", "error", err) return } res.Body.Close() log15.Info("Account uploaded to faucet", "account", fmt.Sprintf("0x%x", account.Address)) os.Remove(keyPath) } // Just wait a bit to ensure transactions get propagated into the network log15.Info("Sleeping to ensure transaction propagation") time.Sleep(10 * time.Second) return case len(*queryFlag) > 0: // Check whether any of our accounts are subscribed to this particular service accounts, err := eth.AccountManager().Accounts() if err != nil || len(accounts) == 0 { log15.Crit("Failed to retrieve account", "accounts", len(accounts), "error", err) return } provider := common.HexToAddress(*queryFlag) log15.Info("Checking subscription status", "service", fmt.Sprintf("0x%x", provider)) for i, account := range accounts { // Check if a subscription exists if !contract.Exists(account.Address, provider) { fmt.Printf("Account #%d: [0x%x]: not subscribed.\n", i, account.Address) continue } // Retrieve the current balance on the subscription ethers := contract.Call("getChannelValue", contract.ChannelId(account.Address, provider)).(*big.Int) funds := float64(new(big.Int).Div(ethers, common.Finney).Int64()) / 1000 fmt.Printf("Account #%d: [0x%x]: subscribed, with %v ether(s) left.\n", i, account.Address, funds) } return case len(*subToFlag) > 0: // Subscription requested, make sure all the details are provided accounts, err := eth.AccountManager().Accounts() if err != nil || len(accounts) < *subAccFlag { log15.Crit("Failed to retrieve account", "accounts", len(accounts), "requested", *subAccFlag, "error", err) return } account := accounts[*subAccFlag] // Check if a subscription exists provider := common.HexToAddress(*subToFlag) if contract.Exists(account.Address, provider) { log15.Error("Account already subscribed", "index", *subAccFlag, "account", fmt.Sprintf("0x%x", account.Address), "service", fmt.Sprintf("0x%x", provider)) return } // Try to subscribe and wait until it completes keystore := client.Keystore() key, err := keystore.GetKey(account.Address, "") if err != nil { log15.Crit("Failed to unlock account", "account", fmt.Sprintf("0x%x", account.Address), "error", err) return } amount := new(big.Int).Mul(big.NewInt(int64(1000000000**subFundFlag)), common.Shannon) log15.Info("Subscribing to new payment channel", "account", fmt.Sprintf("0x%x", account.Address), "service", fmt.Sprintf("0x%x", provider), "ethers", *subFundFlag) pend := make(chan *channels.Channel) tx, err := contract.NewChannel(key.PrivateKey, provider, amount, big.NewInt(1), func(sub *channels.Channel) { pend <- sub }) if err != nil { log15.Crit("Failed to create subscription", "error", err) return } if err := eth.TxPool().Add(tx); err != nil { log15.Crit("Failed to execute subscription", "error", err) return } log15.Info("Waiting for subscription to be finalized...", "tx", tx) log15.Info("Successfully subscribed", "channel", fmt.Sprintf("%x", (<-pend).Id)) return } if *testFlag { accounts, err := eth.AccountManager().Accounts() if err != nil { log15.Crit("Failed retrieving accounts", "err", err) } if len(accounts) < 2 { log15.Crit("Test vectors requires at least 2 accounts", "len", len(accounts)) return } log15.Info("Attempting channel test vectors...") from := accounts[0].Address eth.AccountManager().Unlock(from, "") to := accounts[0].Address log15.Info("making channel name...", "from", from.Hex(), "to", to.Hex(), "ID", contract.ChannelId(from, to).Hex()) log15.Info("checking existence...", "exists", contract.Exists(from, to)) amount := big.NewInt(1) hash := contract.Call("getHash", from, to, 0, amount).([]byte) log15.Info("signing data", "to", to.Hex(), "amount", amount, "hash", common.ToHex(hash)) sig, err := eth.AccountManager().Sign(accounts[0], hash) if err != nil { log15.Crit("signing vailed", "err", err) return } log15.Info("verifying signature", "sig", common.ToHex(sig)) if contract.ValidateSig(from, to, 0, amount, sig) { log15.Info("signature was valid and was verified by the EVM") } else { log15.Crit("signature was invalid") return } log15.Info("verifying payment", "sig", common.ToHex(sig)) if valid, _ := contract.Verify(from, to, 0, amount, sig); valid { log15.Info("payment was valid and was verified by the EVM") } else { log15.Crit("payment was invalid") return } log15.Info("verifying invalid payment", "nonce", 1) if valid, _ := contract.Verify(from, to, 1, amount, sig); valid { log15.Crit("payment was valid") return } else { log15.Info("payment was invalid") } } // If we're running a proxy, start processing external requests if *proxyFlag != "" { // Subscription requested, make sure all the details are provided accounts, err := eth.AccountManager().Accounts() if err != nil || len(accounts) < *subAccFlag { log15.Crit("Failed to retrieve account", "accounts", len(accounts), "requested", *subAccFlag, "error", err) return } account := accounts[*subAccFlag] if err := eth.AccountManager().Unlock(account.Address, ""); err != nil { log15.Crit("Failed to unlock provider account", "account", fmt.Sprintf("0x%x", account.Address), "error", err) return } log15.Info("Setuping vault...", "owner", account.Address.Hex()) // Create the payment vault to hold the various authorizations vault := proxy.NewVault(NewCharger(account, eth.TxPool(), contract, eth.AccountManager())) vault.AutoCharge(*chargeFlag) for i, config := range strings.Split(*proxyFlag, ",") { // Split the proxy configuration parts := strings.Split(config, ":") if len(parts) != 3 { log15.Crit("Invalid proxy config", "config", config) return } extPort, err := strconv.Atoi(parts[0]) if err != nil || extPort < 0 || extPort > 65535 { log15.Crit("Invalid external port number", "port", parts[0]) return } intPort, err := strconv.Atoi(parts[1]) if err != nil || intPort < 0 || intPort > 65535 { log15.Crit("Invalid internal port number", "port", parts[1]) return } var kind proxy.ProxyType switch strings.ToLower(parts[2]) { case "call": kind = proxy.CallProxy case "data": kind = proxy.DataProxy default: log15.Crit("Unsupported proxy type", "type", parts[2], "allowed", []string{"call", "data"}) return } // Create and start the new proxy gateway := proxy.New(i, extPort, intPort, kind, contract, vault) go func() { if err := gateway.Start(); err != nil { log15.Crit("Failed to start proxy", "error", err) os.Exit(-1) } }() } // Wait indefinitely, for now at least for { time.Sleep(time.Second) } } // Clean up for now log15.Info("Terminating Ethereum client...") if err := client.Stop(); err != nil { log15.Crit("Failed to terminate Ethereum client", "error", err) return } }