Merge branch 'develop' into poc8

9 files changed, 128 insertions, 31 deletions

diff --git a/core/chain_manager.go b/core/chain_manager.go
index f9fb3b3f8..a4ff5cb5c 100644
--- a/core/chain_manager.go
+++ b/core/chain_manager.go
@@ -152,6 +152,16 @@ func (bc *ChainManager) Reset() {
 	bc.TD = ethutil.BigD(ethutil.Config.Db.LastKnownTD())
 }
 
+func (self *ChainManager) Export() []byte {
+	chainlogger.Infoln("exporting", self.CurrentBlock.Number, "blocks")
+
+	blocks := make(types.Blocks, int(self.CurrentBlock.Number.Int64())+1)
+	for block := self.CurrentBlock; block != nil; block = self.GetBlock(block.PrevHash) {
+		blocks[block.Number.Int64()] = block
+	}
+	return ethutil.Encode(blocks)
+}
+
 func (bc *ChainManager) insert(block *types.Block) {
 	encodedBlock := block.RlpEncode()
 	ethutil.Config.Db.Put([]byte("LastBlock"), encodedBlock)
@@ -185,7 +195,6 @@ func (self *ChainManager) GetBlockHashesFromHash(hash []byte, max uint64) (chain
 
 	// XXX Could be optimised by using a different database which only holds hashes (i.e., linked list)
 	for i := uint64(0); i < max; i++ {
-
 		chain = append(chain, block.Hash())
 
 		if block.Number.Cmp(ethutil.Big0) <= 0 {
diff --git a/core/chain_manager_test.go b/core/chain_manager_test.go
index 9a8bc9592..a84e3ff3b 100644
--- a/core/chain_manager_test.go
+++ b/core/chain_manager_test.go
@@ -1 +1,19 @@
 package core
+
+import (
+	"fmt"
+	"path"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/ethutil"
+)
+
+func TestChainInsertions(t *testing.T) {
+	c1, err := ethutil.ReadAllFile(path.Join("..", "_data", "chain1"))
+	if err != nil {
+		fmt.Println(err)
+		t.FailNow()
+	}
+	data1, _ := ethutil.Decode([]byte(c1), 0)
+	fmt.Println(data1)
+}
diff --git a/core/execution.go b/core/execution.go
index a464abc66..827e1ee0e 100644
--- a/core/execution.go
+++ b/core/execution.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/state"
 	"github.com/ethereum/go-ethereum/vm"
 )
@@ -36,38 +35,33 @@ func (self *Execution) exec(code, contextAddr []byte, caller vm.ClosureRef) (ret
 	env := self.vm.Env()
 	chainlogger.Debugf("pre state %x\n", env.State().Root())
 
+	if self.vm.Env().Depth() == vm.MaxCallDepth {
+		// Consume all gas (by not returning it) and return a depth error
+		return nil, vm.DepthError{}
+	}
+
 	from, to := env.State().GetStateObject(caller.Address()), env.State().GetOrNewStateObject(self.address)
 	// Skipping transfer is used on testing for the initial call
 	if !self.SkipTransfer {
 		err = env.Transfer(from, to, self.value)
+		if err != nil {
+			caller.ReturnGas(self.Gas, self.price)
+
+			err = fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, from.Balance)
+			return
+		}
 	}
 
 	snapshot := env.State().Copy()
 	defer func() {
-		if vm.IsDepthErr(err) || vm.IsOOGErr(err) {
+		if /*vm.IsDepthErr(err) ||*/ vm.IsOOGErr(err) {
 			env.State().Set(snapshot)
 		}
 		chainlogger.Debugf("post state %x\n", env.State().Root())
 	}()
 
-	if err != nil {
-		caller.ReturnGas(self.Gas, self.price)
-
-		err = fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, from.Balance)
-	} else {
-		self.object = to
-		// Pre-compiled contracts (address.go) 1, 2 & 3.
-		naddr := ethutil.BigD(contextAddr).Uint64()
-		if p := vm.Precompiled[naddr]; p != nil {
-			if self.Gas.Cmp(p.Gas(len(self.input))) >= 0 {
-				ret = p.Call(self.input)
-				self.vm.Printf("NATIVE_FUNC(%x) => %x", naddr, ret)
-				self.vm.Endl()
-			}
-		} else {
-			ret, err = self.vm.Run(to, caller, code, self.value, self.Gas, self.price, self.input)
-		}
-	}
+	self.object = to
+	ret, err = self.vm.Run(to, caller, code, self.value, self.Gas, self.price, self.input)
 
 	return
 }
diff --git a/ethutil/rlp.go b/ethutil/rlp.go
index 1fff2b28a..157dd4dd9 100644
--- a/ethutil/rlp.go
+++ b/ethutil/rlp.go
@@ -2,8 +2,10 @@ package ethutil
 
 import (
 	"bytes"
+	"encoding/binary"
 	"fmt"
 	"math/big"
+	"reflect"
 )
 
 type RlpEncode interface {
@@ -97,6 +99,14 @@ var (
 	zeroRlp   = big.NewInt(0x0)
 )
 
+func intlen(i int64) (length int) {
+	for i > 0 {
+		i = i >> 8
+		length++
+	}
+	return
+}
+
 func Encode(object interface{}) []byte {
 	var buff bytes.Buffer
 
@@ -168,6 +178,26 @@ func Encode(object interface{}) []byte {
 			}
 			WriteSliceHeader(len(b.Bytes()))
 			buff.Write(b.Bytes())
+		default:
+			// This is how it should have been from the start
+			// needs refactoring (@fjl)
+			v := reflect.ValueOf(t)
+			switch v.Kind() {
+			case reflect.Slice:
+				var b bytes.Buffer
+				for i := 0; i < v.Len(); i++ {
+					b.Write(Encode(v.Index(i).Interface()))
+				}
+
+				blen := b.Len()
+				if blen < 56 {
+					buff.WriteByte(byte(blen) + 0xc0)
+				} else {
+					buff.WriteByte(byte(intlen(int64(blen))) + 0xf7)
+					binary.Write(&buff, binary.BigEndian, int64(blen))
+				}
+				buff.ReadFrom(&b)
+			}
 		}
 	} else {
 		// Empty list for nil
diff --git a/ethutil/rlp_test.go b/ethutil/rlp_test.go
index 90057ab42..ff98d3269 100644
--- a/ethutil/rlp_test.go
+++ b/ethutil/rlp_test.go
@@ -7,6 +7,16 @@ import (
 	"testing"
 )
 
+func TestNonInterfaceSlice(t *testing.T) {
+	vala := []string{"value1", "value2", "value3"}
+	valb := []interface{}{"value1", "value2", "value3"}
+	resa := Encode(vala)
+	resb := Encode(valb)
+	if !bytes.Equal(resa, resb) {
+		t.Errorf("expected []string & []interface{} to be equal")
+	}
+}
+
 func TestRlpValueEncoding(t *testing.T) {
 	val := EmptyValue()
 	val.AppendList().Append(1).Append(2).Append(3)
diff --git a/javascript/javascript_runtime.go b/javascript/javascript_runtime.go
index 169ed509e..af1405049 100644
--- a/javascript/javascript_runtime.go
+++ b/javascript/javascript_runtime.go
@@ -121,6 +121,7 @@ func (self *JSRE) initStdFuncs() {
 	eth.Set("startMining", self.startMining)
 	eth.Set("execBlock", self.execBlock)
 	eth.Set("dump", self.dump)
+	eth.Set("export", self.export)
 }
 
 /*
@@ -236,3 +237,20 @@ func (self *JSRE) execBlock(call otto.FunctionCall) otto.Value {
 
 	return otto.TrueValue()
 }
+
+func (self *JSRE) export(call otto.FunctionCall) otto.Value {
+	fn, err := call.Argument(0).ToString()
+	if err != nil {
+		fmt.Println(err)
+		return otto.FalseValue()
+	}
+
+	data := self.ethereum.ChainManager().Export()
+
+	if err := ethutil.WriteFile(fn, data); err != nil {
+		fmt.Println(err)
+		return otto.FalseValue()
+	}
+
+	return otto.TrueValue()
+}
diff --git a/vm/address.go b/vm/address.go
index be8921a3b..611979c94 100644
--- a/vm/address.go
+++ b/vm/address.go
@@ -11,25 +11,25 @@ type Address interface {
 	Call(in []byte) []byte
 }
 
-type PrecompiledAddress struct {
+type PrecompiledAccount struct {
 	Gas func(l int) *big.Int
 	fn  func(in []byte) []byte
 }
 
-func (self PrecompiledAddress) Call(in []byte) []byte {
+func (self PrecompiledAccount) Call(in []byte) []byte {
 	return self.fn(in)
 }
 
-var Precompiled = map[uint64]*PrecompiledAddress{
-	1: &PrecompiledAddress{func(l int) *big.Int {
+var Precompiled = map[string]*PrecompiledAccount{
+	string(ethutil.LeftPadBytes([]byte{1}, 20)): &PrecompiledAccount{func(l int) *big.Int {
 		return GasEcrecover
 	}, ecrecoverFunc},
-	2: &PrecompiledAddress{func(l int) *big.Int {
+	string(ethutil.LeftPadBytes([]byte{2}, 20)): &PrecompiledAccount{func(l int) *big.Int {
 		n := big.NewInt(int64(l+31)/32 + 1)
 		n.Mul(n, GasSha256)
 		return n
 	}, sha256Func},
-	3: &PrecompiledAddress{func(l int) *big.Int {
+	string(ethutil.LeftPadBytes([]byte{3}, 20)): &PrecompiledAccount{func(l int) *big.Int {
 		n := big.NewInt(int64(l+31)/32 + 1)
 		n.Mul(n, GasRipemd)
 		return n
diff --git a/vm/common.go b/vm/common.go
index 592d44ccd..3d6d377ca 100644
--- a/vm/common.go
+++ b/vm/common.go
@@ -48,7 +48,7 @@ var (
 	S256 = ethutil.S256
 )
 
-const MaxCallDepth = 1025
+const MaxCallDepth = 1024
 
 func calcMemSize(off, l *big.Int) *big.Int {
 	if l.Cmp(ethutil.Big0) == 0 {
diff --git a/vm/vm_debug.go b/vm/vm_debug.go
index 8af1979b1..9da832a79 100644
--- a/vm/vm_debug.go
+++ b/vm/vm_debug.go
@@ -48,9 +48,8 @@ func (self *DebugVm) Run(me, caller ClosureRef, code []byte, value, gas, price *
 	})
 	closure := NewClosure(msg, caller, me, code, gas, price)
 
-	if self.env.Depth() == MaxCallDepth {
-		//closure.UseGas(gas)
-		return closure.Return(nil), DepthError{}
+	if p := Precompiled[string(me.Address())]; p != nil {
+		return self.RunPrecompiled(p, callData, closure)
 	}
 
 	if self.Recoverable {
@@ -941,6 +940,25 @@ func (self *DebugVm) Run(me, caller ClosureRef, code []byte, value, gas, price *
 	}
 }
 
+func (self *DebugVm) RunPrecompiled(p *PrecompiledAccount, callData []byte, closure *Closure) (ret []byte, err error) {
+	gas := p.Gas(len(callData))
+	if closure.UseGas(gas) {
+		ret = p.Call(callData)
+		self.Printf("NATIVE_FUNC => %x", ret)
+		self.Endl()
+
+		return closure.Return(ret), nil
+	} else {
+		self.Endl()
+
+		tmp := new(big.Int).Set(closure.Gas)
+
+		closure.UseGas(closure.Gas)
+
+		return closure.Return(nil), OOG(gas, tmp)
+	}
+}
+
 func (self *DebugVm) Printf(format string, v ...interface{}) VirtualMachine {
 	if self.logTy == LogTyPretty {
 		self.logStr += fmt.Sprintf(format, v...)