Merge branch 'release/0.9.23'

7 files changed, 197 insertions, 71 deletions

diff --git a/cmd/geth/admin.go b/cmd/geth/admin.go
index ebdf3512a..4c8f110e4 100644
--- a/cmd/geth/admin.go
+++ b/cmd/geth/admin.go
@@ -8,6 +8,7 @@ import (
 	"strconv"
 	"time"
 
+	"github.com/ethereum/ethash"
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/common"
@@ -35,6 +36,7 @@ func (js *jsre) adminBindings() {
 	eth := ethO.Object()
 	eth.Set("pendingTransactions", js.pendingTransactions)
 	eth.Set("resend", js.resend)
+	eth.Set("sign", js.sign)
 
 	js.re.Set("admin", struct{}{})
 	t, _ := js.re.Get("admin")
@@ -72,6 +74,9 @@ func (js *jsre) adminBindings() {
 	miner.Set("hashrate", js.hashrate)
 	miner.Set("setExtra", js.setExtra)
 	miner.Set("setGasPrice", js.setGasPrice)
+	miner.Set("startAutoDAG", js.startAutoDAG)
+	miner.Set("stopAutoDAG", js.stopAutoDAG)
+	miner.Set("makeDAG", js.makeDAG)
 
 	admin.Set("debug", struct{}{})
 	t, _ = admin.Get("debug")
@@ -177,6 +182,30 @@ func (js *jsre) resend(call otto.FunctionCall) otto.Value {
 	return otto.FalseValue()
 }
 
+func (js *jsre) sign(call otto.FunctionCall) otto.Value {
+	if len(call.ArgumentList) != 2 {
+		fmt.Println("requires 2 arguments: eth.sign(signer, data)")
+		return otto.UndefinedValue()
+	}
+	signer, err := call.Argument(0).ToString()
+	if err != nil {
+		fmt.Println(err)
+		return otto.UndefinedValue()
+	}
+
+	data, err := call.Argument(1).ToString()
+	if err != nil {
+		fmt.Println(err)
+		return otto.UndefinedValue()
+	}
+	v, err := js.xeth.Sign(signer, data, false)
+	if err != nil {
+		fmt.Println(err)
+		return otto.UndefinedValue()
+	}
+	return js.re.ToVal(v)
+}
+
 func (js *jsre) debugBlock(call otto.FunctionCall) otto.Value {
 	block, err := js.getBlock(call)
 	if err != nil {
@@ -253,6 +282,30 @@ func (js *jsre) hashrate(otto.FunctionCall) otto.Value {
 	return js.re.ToVal(js.ethereum.Miner().HashRate())
 }
 
+func (js *jsre) makeDAG(call otto.FunctionCall) otto.Value {
+	blockNumber, err := call.Argument(1).ToInteger()
+	if err != nil {
+		fmt.Println(err)
+		return otto.FalseValue()
+	}
+
+	err = ethash.MakeDAG(uint64(blockNumber), "")
+	if err != nil {
+		return otto.FalseValue()
+	}
+	return otto.TrueValue()
+}
+
+func (js *jsre) startAutoDAG(otto.FunctionCall) otto.Value {
+	js.ethereum.StartAutoDAG()
+	return otto.TrueValue()
+}
+
+func (js *jsre) stopAutoDAG(otto.FunctionCall) otto.Value {
+	js.ethereum.StopAutoDAG()
+	return otto.TrueValue()
+}
+
 func (js *jsre) backtrace(call otto.FunctionCall) otto.Value {
 	tracestr, err := call.Argument(0).ToString()
 	if err != nil {
@@ -291,6 +344,9 @@ func (js *jsre) startMining(call otto.FunctionCall) otto.Value {
 		threads = int64(js.ethereum.MinerThreads)
 	}
 
+	// switch on DAG autogeneration when miner starts
+	js.ethereum.StartAutoDAG()
+
 	err = js.ethereum.StartMining(int(threads))
 	if err != nil {
 		fmt.Println(err)
@@ -302,6 +358,7 @@ func (js *jsre) startMining(call otto.FunctionCall) otto.Value {
 
 func (js *jsre) stopMining(call otto.FunctionCall) otto.Value {
 	js.ethereum.StopMining()
+	js.ethereum.StopAutoDAG()
 	return otto.TrueValue()
 }
 
@@ -383,7 +440,7 @@ func (js *jsre) unlock(call otto.FunctionCall) otto.Value {
 	var passphrase string
 	if arg.IsUndefined() {
 		fmt.Println("Please enter a passphrase now.")
-		passphrase, err = readPassword("Passphrase: ", true)
+		passphrase, err = utils.PromptPassword("Passphrase: ", true)
 		if err != nil {
 			fmt.Println(err)
 			return otto.FalseValue()
@@ -410,12 +467,12 @@ func (js *jsre) newAccount(call otto.FunctionCall) otto.Value {
 	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)
+		auth, err := utils.PromptPassword("Passphrase: ", true)
 		if err != nil {
 			fmt.Println(err)
 			return otto.FalseValue()
 		}
-		confirm, err := readPassword("Repeat Passphrase: ", false)
+		confirm, err := utils.PromptPassword("Repeat Passphrase: ", false)
 		if err != nil {
 			fmt.Println(err)
 			return otto.FalseValue()
diff --git a/cmd/geth/info_test.json b/cmd/geth/info_test.json
index 1e0c271ac..63f2163a9 100644
--- a/cmd/geth/info_test.json
+++ b/cmd/geth/info_test.json
@@ -1 +1 @@
-{"code":"605280600c6000396000f3006000357c010000000000000000000000000000000000000000000000000000000090048063c6888fa114602e57005b60376004356041565b8060005260206000f35b6000600782029050604d565b91905056","info":{"abiDefinition":[{"constant":false,"inputs":[{"name":"a","type":"uint256"}],"name":"multiply","outputs":[{"name":"d","type":"uint256"}],"type":"function"}],"compilerVersion":"0.9.17","developerDoc":{"methods":{}},"language":"Solidity","languageVersion":"0","source":"contract test {\n   /// @notice Will multiply `a` by 7.\n   function multiply(uint a) returns(uint d) {\n       return a * 7;\n   }\n}\n","userDoc":{"methods":{"multiply(uint256)":{"notice":"Will multiply `a` by 7."}}}}}
\ No newline at end of file
+{"code":"0x605880600c6000396000f3006000357c010000000000000000000000000000000000000000000000000000000090048063c6888fa114602e57005b603d6004803590602001506047565b8060005260206000f35b60006007820290506053565b91905056","info":{"abiDefinition":[{"constant":false,"inputs":[{"name":"a","type":"uint256"}],"name":"multiply","outputs":[{"name":"d","type":"uint256"}],"type":"function"}],"compilerVersion":"0.9.23","developerDoc":{"methods":{}},"language":"Solidity","languageVersion":"0","source":"contract test {\n   /// @notice Will multiply `a` by 7.\n   function multiply(uint a) returns(uint d) {\n       return a * 7;\n   }\n}\n","userDoc":{"methods":{"multiply(uint256)":{"notice":"Will multiply `a` by 7."}}}}}
\ No newline at end of file
diff --git a/cmd/geth/js.go b/cmd/geth/js.go
index 4ddb3bd9c..f99051a1e 100644
--- a/cmd/geth/js.go
+++ b/cmd/geth/js.go
@@ -71,7 +71,7 @@ type jsre struct {
 	prompter
 }
 
-func newJSRE(ethereum *eth.Ethereum, libPath, solcPath, corsDomain string, interactive bool, f xeth.Frontend) *jsre {
+func newJSRE(ethereum *eth.Ethereum, libPath, corsDomain string, interactive bool, f xeth.Frontend) *jsre {
 	js := &jsre{ethereum: ethereum, ps1: "> "}
 	// set default cors domain used by startRpc from CLI flag
 	js.corsDomain = corsDomain
@@ -81,7 +81,6 @@ func newJSRE(ethereum *eth.Ethereum, libPath, solcPath, corsDomain string, inter
 	js.xeth = xeth.New(ethereum, f)
 	js.wait = js.xeth.UpdateState()
 	// update state in separare forever blocks
-	js.xeth.SetSolc(solcPath)
 	js.re = re.New(libPath)
 	js.apiBindings(f)
 	js.adminBindings()
diff --git a/cmd/geth/js_test.go b/cmd/geth/js_test.go
index e02e8f704..41e1034e9 100644
--- a/cmd/geth/js_test.go
+++ b/cmd/geth/js_test.go
@@ -24,7 +24,7 @@ import (
 
 const (
 	testSolcPath = ""
-	solcVersion  = "0.9.17"
+	solcVersion  = "0.9.23"
 
 	testKey     = "e6fab74a43941f82d89cb7faa408e227cdad3153c4720e540e855c19b15e6674"
 	testAddress = "0x8605cdbbdb6d264aa742e77020dcbc58fcdce182"
@@ -34,6 +34,7 @@ const (
 )
 
 var (
+	versionRE   = regexp.MustCompile(strconv.Quote(`"compilerVersion":"` + solcVersion + `"`))
 	testGenesis = `{"` + testAddress[2:] + `": {"balance": "` + testBalance + `"}}`
 )
 
@@ -75,6 +76,7 @@ func testJEthRE(t *testing.T) (string, *testjethre, *eth.Ethereum) {
 		AccountManager: am,
 		MaxPeers:       0,
 		Name:           "test",
+		SolcPath:       testSolcPath,
 	})
 	if err != nil {
 		t.Fatal("%v", err)
@@ -101,7 +103,7 @@ func testJEthRE(t *testing.T) (string, *testjethre, *eth.Ethereum) {
 		t.Errorf("Error creating DocServer: %v", err)
 	}
 	tf := &testjethre{ds: ds, stateDb: ethereum.ChainManager().State().Copy()}
-	repl := newJSRE(ethereum, assetPath, testSolcPath, "", false, tf)
+	repl := newJSRE(ethereum, assetPath, "", false, tf)
 	tf.jsre = repl
 	return tmp, tf, ethereum
 }
@@ -172,6 +174,8 @@ func TestBlockChain(t *testing.T) {
 	tmpfile := filepath.Join(extmp, "export.chain")
 	tmpfileq := strconv.Quote(tmpfile)
 
+	ethereum.ChainManager().Reset()
+
 	checkEvalJSON(t, repl, `admin.export(`+tmpfileq+`)`, `true`)
 	if _, err := os.Stat(tmpfile); err != nil {
 		t.Fatal(err)
@@ -226,11 +230,11 @@ func TestSignature(t *testing.T) {
 	defer ethereum.Stop()
 	defer os.RemoveAll(tmp)
 
-	val, err := repl.re.Run(`eth.sign({from: "` + testAddress + `", data: "` + testHash + `"})`)
+	val, err := repl.re.Run(`eth.sign("` + testAddress + `", "` + testHash + `")`)
 
 	// This is a very preliminary test, lacking actual signature verification
 	if err != nil {
-		t.Errorf("Error runnig js: %v", err)
+		t.Errorf("Error running js: %v", err)
 		return
 	}
 	output := val.String()
@@ -244,7 +248,6 @@ func TestSignature(t *testing.T) {
 }
 
 func TestContract(t *testing.T) {
-	t.Skip()
 
 	tmp, repl, ethereum := testJEthRE(t)
 	if err := ethereum.Start(); err != nil {
@@ -257,7 +260,9 @@ func TestContract(t *testing.T) {
 	var txc uint64
 	coinbase := common.HexToAddress(testAddress)
 	resolver.New(repl.xeth).CreateContracts(coinbase)
+	// time.Sleep(1000 * time.Millisecond)
 
+	// checkEvalJSON(t, repl, `eth.getBlock("pending", true).transactions.length`, `2`)
 	source := `contract test {\n` +
 		"   /// @notice Will multiply `a` by 7." + `\n` +
 		`   function multiply(uint a) returns(uint d) {\n` +
@@ -277,10 +282,9 @@ func TestContract(t *testing.T) {
 	// if solc is found with right version, test it, otherwise read from file
 	sol, err := compiler.New("")
 	if err != nil {
-		t.Logf("solc not found: skipping compiler test")
+		t.Logf("solc not found: mocking contract compilation step")
 	} else if sol.Version() != solcVersion {
-		err = fmt.Errorf("solc wrong version found (%v, expect %v): skipping compiler test", sol.Version(), solcVersion)
-		t.Log(err)
+		t.Logf("WARNING: solc different version found (%v, test written for %v, may need to update)", sol.Version(), solcVersion)
 	}
 
 	if err != nil {
@@ -293,10 +297,10 @@ func TestContract(t *testing.T) {
 			t.Errorf("%v", err)
 		}
 	} else {
-		checkEvalJSON(t, repl, `contract = eth.compile.solidity(source)`, string(contractInfo))
+		checkEvalJSON(t, repl, `contract = eth.compile.solidity(source).test`, string(contractInfo))
 	}
 
-	checkEvalJSON(t, repl, `contract.code`, `"605280600c6000396000f3006000357c010000000000000000000000000000000000000000000000000000000090048063c6888fa114602e57005b60376004356041565b8060005260206000f35b6000600782029050604d565b91905056"`)
+	checkEvalJSON(t, repl, `contract.code`, `"0x605880600c6000396000f3006000357c010000000000000000000000000000000000000000000000000000000090048063c6888fa114602e57005b603d6004803590602001506047565b8060005260206000f35b60006007820290506053565b91905056"`)
 
 	checkEvalJSON(
 		t, repl,
@@ -306,15 +310,16 @@ func TestContract(t *testing.T) {
 
 	callSetup := `abiDef = JSON.parse('[{"constant":false,"inputs":[{"name":"a","type":"uint256"}],"name":"multiply","outputs":[{"name":"d","type":"uint256"}],"type":"function"}]');
 Multiply7 = eth.contract(abiDef);
-multiply7 = new Multiply7(contractaddress);
+multiply7 = Multiply7.at(contractaddress);
 `
-
+	// time.Sleep(1500 * time.Millisecond)
 	_, err = repl.re.Run(callSetup)
 	if err != nil {
-		t.Errorf("unexpected error registering, got %v", err)
+		t.Errorf("unexpected error setting up contract, got %v", err)
 	}
 
-	// updatespec
+	// checkEvalJSON(t, repl, `eth.getBlock("pending", true).transactions.length`, `3`)
+
 	// why is this sometimes failing?
 	// checkEvalJSON(t, repl, `multiply7.multiply.call(6)`, `42`)
 	expNotice := ""
@@ -322,20 +327,23 @@ multiply7 = new Multiply7(contractaddress);
 		t.Errorf("incorrect confirmation message: expected %v, got %v", expNotice, repl.lastConfirm)
 	}
 
-	// why 0?
-	checkEvalJSON(t, repl, `eth.getBlock("pending", true).transactions.length`, `0`)
-
 	txc, repl.xeth = repl.xeth.ApplyTestTxs(repl.stateDb, coinbase, txc)
 
 	checkEvalJSON(t, repl, `admin.contractInfo.start()`, `true`)
 	checkEvalJSON(t, repl, `multiply7.multiply.sendTransaction(6, { from: primary, gas: "1000000", gasPrice: "100000" })`, `undefined`)
-	expNotice = `About to submit transaction (no NatSpec info found for contract: content hash not found for '0x4a6c99e127191d2ee302e42182c338344b39a37a47cdbb17ab0f26b6802eb4d1'): {"params":[{"to":"0x5dcaace5982778b409c524873b319667eba5d074","data": "0xc6888fa10000000000000000000000000000000000000000000000000000000000000006"}]}`
+	expNotice = `About to submit transaction (no NatSpec info found for contract: content hash not found for '0x87e2802265838c7f14bb69eecd2112911af6767907a702eeaa445239fb20711b'): {"params":[{"to":"0x5dcaace5982778b409c524873b319667eba5d074","data": "0xc6888fa10000000000000000000000000000000000000000000000000000000000000006"}]}`
 	if repl.lastConfirm != expNotice {
 		t.Errorf("incorrect confirmation message: expected %v, got %v", expNotice, repl.lastConfirm)
 	}
 
+	var contenthash = `"0x86d2b7cf1e72e9a7a3f8d96601f0151742a2f780f1526414304fbe413dc7f9bd"`
+	if sol != nil {
+		modContractInfo := versionRE.ReplaceAll(contractInfo, []byte(`"compilerVersion":"`+sol.Version()+`"`))
+		_ = modContractInfo
+		// contenthash = crypto.Sha3(modContractInfo)
+	}
 	checkEvalJSON(t, repl, `filename = "/tmp/info.json"`, `"/tmp/info.json"`)
-	checkEvalJSON(t, repl, `contenthash = admin.contractInfo.register(primary, contractaddress, contract, filename)`, `"0x0d067e2dd99a4d8f0c0279738b17130dd415a89f24a23f0e7cf68c546ae3089d"`)
+	checkEvalJSON(t, repl, `contenthash = admin.contractInfo.register(primary, contractaddress, contract, filename)`, contenthash)
 	checkEvalJSON(t, repl, `admin.contractInfo.registerUrl(primary, contenthash, "file://"+filename)`, `true`)
 	if err != nil {
 		t.Errorf("unexpected error registering, got %v", err)
diff --git a/cmd/geth/main.go b/cmd/geth/main.go
index 3f3af2b64..513b405ff 100644
--- a/cmd/geth/main.go
+++ b/cmd/geth/main.go
@@ -21,7 +21,6 @@
 package main
 
 import (
-	"bufio"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -44,13 +43,12 @@ import (
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/mattn/go-colorable"
 	"github.com/mattn/go-isatty"
-	"github.com/peterh/liner"
 )
 import _ "net/http/pprof"
 
 const (
 	ClientIdentifier = "Geth"
-	Version          = "0.9.22"
+	Version          = "0.9.23"
 )
 
 var (
@@ -101,7 +99,15 @@ The output of this command is supposed to be machine-readable.
 					Usage:  "import ethereum presale wallet",
 				},
 			},
-		},
+			Description: `
+
+    get wallet import /path/to/my/presale.wallet
+
+will prompt for your password and imports your ether presale account.
+It can be used non-interactively with the --password option taking a
+passwordfile as argument containing the wallet password in plaintext.
+
+`},
 		{
 			Action: accountList,
 			Name:   "account",
@@ -111,7 +117,7 @@ The output of this command is supposed to be machine-readable.
 Manage accounts lets you create new accounts, list all existing accounts,
 import a private key into a new account.
 
-'account help' shows a list of subcommands or help for one subcommand.
+'            help' shows a list of subcommands or help for one subcommand.
 
 It supports interactive mode, when you are prompted for password as well as
 non-interactive mode where passwords are supplied via a given password file.
@@ -230,6 +236,11 @@ JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Conso
 			Name:   "upgradedb",
 			Usage:  "upgrade chainblock database",
 		},
+		{
+			Action: removeDb,
+			Name:   "removedb",
+			Usage:  "Remove blockchain and state databases",
+		},
 	}
 	app.Flags = []cli.Flag{
 		utils.IdentityFlag,
@@ -246,6 +257,7 @@ JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Conso
 		utils.GasPriceFlag,
 		utils.MinerThreadsFlag,
 		utils.MiningEnabledFlag,
+		utils.AutoDAGFlag,
 		utils.NATFlag,
 		utils.NatspecEnabledFlag,
 		utils.NodeKeyFileFlag,
@@ -323,7 +335,6 @@ func console(ctx *cli.Context) {
 	repl := newJSRE(
 		ethereum,
 		ctx.String(utils.JSpathFlag.Name),
-		ctx.String(utils.SolcPathFlag.Name),
 		ctx.GlobalString(utils.RPCCORSDomainFlag.Name),
 		true,
 		nil,
@@ -345,7 +356,6 @@ func execJSFiles(ctx *cli.Context) {
 	repl := newJSRE(
 		ethereum,
 		ctx.String(utils.JSpathFlag.Name),
-		ctx.String(utils.SolcPathFlag.Name),
 		ctx.GlobalString(utils.RPCCORSDomainFlag.Name),
 		false,
 		nil,
@@ -361,12 +371,20 @@ func execJSFiles(ctx *cli.Context) {
 func unlockAccount(ctx *cli.Context, am *accounts.Manager, account string) (passphrase string) {
 	var err error
 	// Load startup keys. XXX we are going to need a different format
-	// Attempt to unlock the account
-	passphrase = getPassPhrase(ctx, "", false)
+
 	if len(account) == 0 {
 		utils.Fatalf("Invalid account address '%s'", account)
 	}
-	err = am.Unlock(common.HexToAddress(account), passphrase)
+	// Attempt to unlock the account 3 times
+	attempts := 3
+	for tries := 0; tries < attempts; tries++ {
+		msg := fmt.Sprintf("Unlocking account %s...%s | Attempt %d/%d", account[:8], account[len(account)-6:], tries+1, attempts)
+		passphrase = getPassPhrase(ctx, msg, false)
+		err = am.Unlock(common.HexToAddress(account), passphrase)
+		if err == nil {
+			break
+		}
+	}
 	if err != nil {
 		utils.Fatalf("Unlock account failed '%v'", err)
 	}
@@ -381,15 +399,18 @@ func startEth(ctx *cli.Context, eth *eth.Ethereum) {
 	am := eth.AccountManager()
 
 	account := ctx.GlobalString(utils.UnlockedAccountFlag.Name)
-	if len(account) > 0 {
-		if account == "primary" {
-			primaryAcc, err := am.Primary()
-			if err != nil {
-				utils.Fatalf("no primary account: %v", err)
+	accounts := strings.Split(account, " ")
+	for _, account := range accounts {
+		if len(account) > 0 {
+			if account == "primary" {
+				primaryAcc, err := am.Primary()
+				if err != nil {
+					utils.Fatalf("no primary account: %v", err)
+				}
+				account = primaryAcc.Hex()
 			}
-			account = primaryAcc.Hex()
+			unlockAccount(ctx, am, account)
 		}
-		unlockAccount(ctx, am, account)
 	}
 	// Start auxiliary services if enabled.
 	if ctx.GlobalBool(utils.RPCEnabledFlag.Name) {
@@ -421,12 +442,12 @@ func getPassPhrase(ctx *cli.Context, desc string, confirmation bool) (passphrase
 	passfile := ctx.GlobalString(utils.PasswordFileFlag.Name)
 	if len(passfile) == 0 {
 		fmt.Println(desc)
-		auth, err := readPassword("Passphrase: ", true)
+		auth, err := utils.PromptPassword("Passphrase: ", true)
 		if err != nil {
 			utils.Fatalf("%v", err)
 		}
 		if confirmation {
-			confirm, err := readPassword("Repeat Passphrase: ", false)
+			confirm, err := utils.PromptPassword("Repeat Passphrase: ", false)
 			if err != nil {
 				utils.Fatalf("%v", err)
 			}
@@ -543,6 +564,25 @@ func exportchain(ctx *cli.Context) {
 	return
 }
 
+func removeDb(ctx *cli.Context) {
+	confirm, err := utils.PromptConfirm("Remove local databases?")
+	if err != nil {
+		utils.Fatalf("%v", err)
+	}
+
+	if confirm {
+		fmt.Println("Removing chain and state databases...")
+		start := time.Now()
+
+		os.RemoveAll(filepath.Join(ctx.GlobalString(utils.DataDirFlag.Name), "blockchain"))
+		os.RemoveAll(filepath.Join(ctx.GlobalString(utils.DataDirFlag.Name), "state"))
+
+		fmt.Printf("Removed in %v\n", time.Since(start))
+	} else {
+		fmt.Println("Operation aborted")
+	}
+}
+
 func upgradeDb(ctx *cli.Context) {
 	fmt.Println("Upgrade blockchain DB")
 
@@ -574,6 +614,7 @@ func upgradeDb(ctx *cli.Context) {
 	ethereum.ExtraDb().Close()
 
 	os.RemoveAll(filepath.Join(ctx.GlobalString(utils.DataDirFlag.Name), "blockchain"))
+	os.RemoveAll(filepath.Join(ctx.GlobalString(utils.DataDirFlag.Name), "state"))
 
 	ethereum, err = eth.New(cfg)
 	if err != nil {
@@ -665,18 +706,3 @@ func hashish(x string) bool {
 	_, err := strconv.Atoi(x)
 	return err != nil
 }
-
-func readPassword(prompt string, warnTerm bool) (string, error) {
-	if liner.TerminalSupported() {
-		lr := liner.NewLiner()
-		defer lr.Close()
-		return lr.PasswordPrompt(prompt)
-	}
-	if warnTerm {
-		fmt.Println("!! Unsupported terminal, password will be echoed.")
-	}
-	fmt.Print(prompt)
-	input, err := bufio.NewReader(os.Stdin).ReadString('\n')
-	fmt.Println()
-	return input, err
-}
diff --git a/cmd/utils/cmd.go b/cmd/utils/cmd.go
index fb55a64af..39b4e46da 100644
--- a/cmd/utils/cmd.go
+++ b/cmd/utils/cmd.go
@@ -22,11 +22,13 @@
 package utils
 
 import (
+	"bufio"
 	"fmt"
 	"io"
 	"os"
 	"os/signal"
 	"regexp"
+	"strings"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core"
@@ -35,6 +37,7 @@ import (
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/logger/glog"
 	"github.com/ethereum/go-ethereum/rlp"
+	"github.com/peterh/liner"
 )
 
 var interruptCallbacks = []func(os.Signal){}
@@ -71,18 +74,45 @@ func openLogFile(Datadir string, filename string) *os.File {
 	return file
 }
 
-func confirm(message string) bool {
-	fmt.Println(message, "Are you sure? (y/n)")
-	var r string
-	fmt.Scanln(&r)
-	for ; ; fmt.Scanln(&r) {
-		if r == "n" || r == "y" {
-			break
-		} else {
-			fmt.Printf("Yes or no? (%s)", r)
-		}
+func PromptConfirm(prompt string) (bool, error) {
+	var (
+		input string
+		err   error
+	)
+	prompt = prompt + " [y/N] "
+
+	if liner.TerminalSupported() {
+		lr := liner.NewLiner()
+		defer lr.Close()
+		input, err = lr.Prompt(prompt)
+	} else {
+		fmt.Print(prompt)
+		input, err = bufio.NewReader(os.Stdin).ReadString('\n')
+		fmt.Println()
+	}
+
+	if len(input) > 0 && strings.ToUpper(input[:1]) == "Y" {
+		return true, nil
+	} else {
+		return false, nil
+	}
+
+	return false, err
+}
+
+func PromptPassword(prompt string, warnTerm bool) (string, error) {
+	if liner.TerminalSupported() {
+		lr := liner.NewLiner()
+		defer lr.Close()
+		return lr.PasswordPrompt(prompt)
+	}
+	if warnTerm {
+		fmt.Println("!! Unsupported terminal, password will be echoed.")
 	}
-	return r == "y"
+	fmt.Print(prompt)
+	input, err := bufio.NewReader(os.Stdin).ReadString('\n')
+	fmt.Println()
+	return input, err
 }
 
 func initDataDir(Datadir string) {
diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index 6ec4fdc55..cb774aa5b 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -112,6 +112,10 @@ var (
 		Name:  "mine",
 		Usage: "Enable mining",
 	}
+	AutoDAGFlag = cli.BoolFlag{
+		Name:  "autodag",
+		Usage: "Enable automatic DAG pregeneration",
+	}
 	EtherbaseFlag = cli.StringFlag{
 		Name:  "etherbase",
 		Usage: "Public address for block mining rewards. By default the address of your primary account is used",
@@ -313,6 +317,8 @@ func MakeEthConfig(clientID, version string, ctx *cli.Context) *eth.Config {
 		Dial:               true,
 		BootNodes:          ctx.GlobalString(BootnodesFlag.Name),
 		GasPrice:           common.String2Big(ctx.GlobalString(GasPriceFlag.Name)),
+		SolcPath:           ctx.GlobalString(SolcPathFlag.Name),
+		AutoDAG:            ctx.GlobalBool(AutoDAGFlag.Name) || ctx.GlobalBool(MiningEnabledFlag.Name),
 	}
 
 }
@@ -336,8 +342,8 @@ func GetChain(ctx *cli.Context) (*core.ChainManager, common.Database, common.Dat
 	}
 
 	eventMux := new(event.TypeMux)
-	chainManager := core.NewChainManager(blockDb, stateDb, eventMux)
 	pow := ethash.New()
+	chainManager := core.NewChainManager(blockDb, stateDb, pow, eventMux)
 	txPool := core.NewTxPool(eventMux, chainManager.State, chainManager.GasLimit)
 	blockProcessor := core.NewBlockProcessor(stateDb, extraDb, pow, txPool, chainManager, eventMux)
 	chainManager.SetProcessor(blockProcessor)