Added general Pipe API

6 files changed, 345 insertions, 0 deletions

diff --git a/ethpipe/config.go b/ethpipe/config.go
new file mode 100644
index 000000000..764f5596f
--- /dev/null
+++ b/ethpipe/config.go
@@ -0,0 +1,47 @@
+package ethpipe
+
+import (
+	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/ethutil"
+)
+
+var cnfCtr = ethutil.Hex2Bytes("661005d2720d855f1d9976f88bb10c1a3398c77f")
+
+type object struct {
+	*ethstate.StateObject
+}
+
+func (self object) StorageString(str string) *ethutil.Value {
+	if ethutil.IsHex(str) {
+		return self.Storage(ethutil.Hex2Bytes(str[2:]))
+	} else {
+		return self.Storage(ethutil.RightPadBytes([]byte(str), 32))
+	}
+}
+
+func (self object) Storage(addr []byte) *ethutil.Value {
+	return self.StateObject.GetStorage(ethutil.BigD(addr))
+}
+
+type config struct {
+	pipe *Pipe
+}
+
+func (self *config) Get(name string) object {
+	configCtrl := self.pipe.World().safeGet(cnfCtr)
+	var addr []byte
+
+	switch name {
+	case "NameReg":
+		addr = []byte{0}
+	default:
+		addr = ethutil.RightPadBytes([]byte(name), 32)
+	}
+
+	objectAddr := configCtrl.GetStorage(ethutil.BigD(addr))
+	return object{self.pipe.World().safeGet(objectAddr.Bytes())}
+}
+
+func (self *config) Exist() bool {
+	return self.pipe.World().Get(cnfCtr) != nil
+}
diff --git a/ethpipe/pipe.go b/ethpipe/pipe.go
new file mode 100644
index 000000000..710fc4e7c
--- /dev/null
+++ b/ethpipe/pipe.go
@@ -0,0 +1,135 @@
+package ethpipe
+
+import (
+	"strings"
+
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethcrypto"
+	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/ethereum/eth-go/ethvm"
+)
+
+var logger = ethlog.NewLogger("PIPE")
+
+type Pipe struct {
+	obj          ethchain.EthManager
+	stateManager *ethchain.StateManager
+	blockChain   *ethchain.BlockChain
+	world        *world
+}
+
+func New(obj ethchain.EthManager) *Pipe {
+	pipe := &Pipe{
+		obj:          obj,
+		stateManager: obj.StateManager(),
+		blockChain:   obj.BlockChain(),
+	}
+	pipe.world = NewWorld(pipe)
+
+	return pipe
+}
+
+func (self *Pipe) Balance(addr []byte) *ethutil.Value {
+	return ethutil.NewValue(self.World().safeGet(addr).Balance)
+}
+
+func (self *Pipe) Nonce(addr []byte) uint64 {
+	return self.World().safeGet(addr).Nonce
+}
+
+func (self *Pipe) Execute(addr []byte, data []byte, value, gas, price *ethutil.Value) ([]byte, error) {
+	return self.ExecuteObject(self.World().safeGet(addr), data, value, gas, price)
+}
+
+func (self *Pipe) ExecuteObject(object *ethstate.StateObject, data []byte, value, gas, price *ethutil.Value) ([]byte, error) {
+	var (
+		initiator = ethstate.NewStateObject([]byte{0})
+		state     = self.World().State().Copy()
+		block     = self.blockChain.CurrentBlock
+	)
+
+	vm := ethvm.New(NewEnv(state, block, value.BigInt(), initiator.Address()))
+
+	closure := ethvm.NewClosure(initiator, object, object.Code, gas.BigInt(), price.BigInt())
+	ret, _, err := closure.Call(vm, data)
+
+	return ret, err
+}
+
+func (self *Pipe) Block(hash []byte) *ethchain.Block {
+	return self.blockChain.GetBlock(hash)
+}
+
+func (self *Pipe) Storage(addr, storageAddr []byte) *ethutil.Value {
+	return self.World().safeGet(addr).GetStorage(ethutil.BigD(storageAddr))
+}
+
+func (self *Pipe) ToAddress(priv []byte) []byte {
+	pair, err := ethcrypto.NewKeyPairFromSec(priv)
+	if err != nil {
+		return nil
+	}
+
+	return pair.Address()
+}
+
+func (self *Pipe) TransactString(key *ethcrypto.KeyPair, rec string, value, gas, price *ethutil.Value, data []byte) error {
+	// Check if an address is stored by this address
+	var hash []byte
+	addr := self.World().Config().Get("NameReg").StorageString(rec).Bytes()
+	if len(addr) > 0 {
+		hash = addr
+	} else if ethutil.IsHex(rec) {
+		hash = ethutil.Hex2Bytes(rec[2:])
+	} else {
+		hash = ethutil.Hex2Bytes(rec)
+	}
+
+	return self.Transact(key, hash, value, gas, price, data)
+}
+
+func (self *Pipe) Transact(key *ethcrypto.KeyPair, rec []byte, value, gas, price *ethutil.Value, data []byte) error {
+	var hash []byte
+	var contractCreation bool
+	if rec == nil {
+		contractCreation = true
+	}
+
+	var tx *ethchain.Transaction
+	// Compile and assemble the given data
+	if contractCreation {
+		script, err := ethutil.Compile(string(data), false)
+		if err != nil {
+			return err
+		}
+
+		tx = ethchain.NewContractCreationTx(value.BigInt(), gas.BigInt(), price.BigInt(), script)
+	} else {
+		data := ethutil.StringToByteFunc(string(data), func(s string) (ret []byte) {
+			slice := strings.Split(s, "\n")
+			for _, dataItem := range slice {
+				d := ethutil.FormatData(dataItem)
+				ret = append(ret, d...)
+			}
+			return
+		})
+
+		tx = ethchain.NewTransactionMessage(hash, value.BigInt(), gas.BigInt(), price.BigInt(), data)
+	}
+
+	acc := self.stateManager.TransState().GetOrNewStateObject(key.Address())
+	tx.Nonce = acc.Nonce
+	acc.Nonce += 1
+	self.stateManager.TransState().UpdateStateObject(acc)
+
+	tx.Sign(key.PrivateKey)
+	self.obj.TxPool().QueueTransaction(tx)
+
+	if contractCreation {
+		logger.Infof("Contract addr %x", tx.CreationAddress())
+	}
+
+	return nil
+}
diff --git a/ethpipe/pipe_test.go b/ethpipe/pipe_test.go
new file mode 100644
index 000000000..d0b8ef948
--- /dev/null
+++ b/ethpipe/pipe_test.go
@@ -0,0 +1,57 @@
+package ethpipe
+
+import (
+	"testing"
+
+	"github.com/ethereum/eth-go/ethcrypto"
+	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/ethutil"
+)
+
+func Val(v interface{}) *ethutil.Value {
+	return ethutil.NewValue(v)
+}
+
+func TestNew(t *testing.T) {
+	pipe := New(nil)
+
+	var addr, privy, recp, data []byte
+	var object *ethstate.StateObject
+	var key *ethcrypto.KeyPair
+
+	world := pipe.World()
+	world.Get(addr)
+	world.Coinbase()
+	world.IsMining()
+	world.IsListening()
+	world.State()
+	peers := world.Peers()
+	peers.Len()
+
+	// Shortcut functions
+	pipe.Balance(addr)
+	pipe.Nonce(addr)
+	pipe.Block(addr)
+	pipe.Storage(addr, addr)
+	pipe.ToAddress(privy)
+	// Doesn't change state
+	pipe.Execute(addr, nil, Val(0), Val(1000000), Val(10))
+	// Doesn't change state
+	pipe.ExecuteObject(object, nil, Val(0), Val(1000000), Val(10))
+
+	conf := world.Config()
+	namereg := conf.Get("NameReg")
+	namereg.Storage(addr)
+
+	var err error
+	// Transact
+	err = pipe.Transact(key, recp, ethutil.NewValue(0), ethutil.NewValue(0), ethutil.NewValue(0), nil)
+	if err != nil {
+		t.Error(err)
+	}
+	// Create
+	err = pipe.Transact(key, nil, ethutil.NewValue(0), ethutil.NewValue(0), ethutil.NewValue(0), data)
+	if err != nil {
+		t.Error(err)
+	}
+}
diff --git a/ethpipe/vm_env.go b/ethpipe/vm_env.go
new file mode 100644
index 000000000..c06a2a763
--- /dev/null
+++ b/ethpipe/vm_env.go
@@ -0,0 +1,33 @@
+package ethpipe
+
+import (
+	"math/big"
+
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethstate"
+)
+
+type VMEnv struct {
+	state  *ethstate.State
+	block  *ethchain.Block
+	value  *big.Int
+	sender []byte
+}
+
+func NewEnv(state *ethstate.State, block *ethchain.Block, value *big.Int, sender []byte) *VMEnv {
+	return &VMEnv{
+		state:  state,
+		block:  block,
+		value:  value,
+		sender: sender,
+	}
+}
+
+func (self *VMEnv) Origin() []byte         { return self.sender }
+func (self *VMEnv) BlockNumber() *big.Int  { return self.block.Number }
+func (self *VMEnv) PrevHash() []byte       { return self.block.PrevHash }
+func (self *VMEnv) Coinbase() []byte       { return self.block.Coinbase }
+func (self *VMEnv) Time() int64            { return self.block.Time }
+func (self *VMEnv) Difficulty() *big.Int   { return self.block.Difficulty }
+func (self *VMEnv) Value() *big.Int        { return self.value }
+func (self *VMEnv) State() *ethstate.State { return self.state }
diff --git a/ethpipe/world.go b/ethpipe/world.go
new file mode 100644
index 000000000..507391521
--- /dev/null
+++ b/ethpipe/world.go
@@ -0,0 +1,60 @@
+package ethpipe
+
+import (
+	"container/list"
+
+	"github.com/ethereum/eth-go/ethstate"
+)
+
+type world struct {
+	pipe *Pipe
+	cfg  *config
+}
+
+func NewWorld(pipe *Pipe) *world {
+	world := &world{pipe, nil}
+	world.cfg = &config{pipe}
+
+	return world
+}
+
+func (self *Pipe) World() *world {
+	return self.world
+}
+
+func (self *world) State() *ethstate.State {
+	return self.pipe.stateManager.CurrentState()
+}
+
+func (self *world) Get(addr []byte) *ethstate.StateObject {
+	return self.State().GetStateObject(addr)
+}
+
+func (self *world) safeGet(addr []byte) *ethstate.StateObject {
+	object := self.Get(addr)
+	if object != nil {
+		return object
+	}
+
+	return ethstate.NewStateObject(addr)
+}
+
+func (self *world) Coinbase() *ethstate.StateObject {
+	return nil
+}
+
+func (self *world) IsMining() bool {
+	return self.pipe.obj.IsMining()
+}
+
+func (self *world) IsListening() bool {
+	return self.pipe.obj.IsListening()
+}
+
+func (self *world) Peers() *list.List {
+	return self.obj.Peers()
+}
+
+func (self *world) Config() *config {
+	return self.cfg
+}
diff --git a/ethutil/value.go b/ethutil/value.go
index 3128cd724..2233b978c 100644
--- a/ethutil/value.go
+++ b/ethutil/value.go
@@ -122,6 +122,14 @@ func (val *Value) Bytes() []byte {
 	return []byte{}
 }
 
+func (val *Value) Err() error {
+	if err, ok := val.Val.(error); ok {
+		return err
+	}
+
+	return nil
+}
+
 func (val *Value) Slice() []interface{} {
 	if d, ok := val.Val.([]interface{}); ok {
 		return d
@@ -157,6 +165,11 @@ func (val *Value) IsStr() bool {
 	return val.Type() == reflect.String
 }
 
+func (self *Value) IsErr() bool {
+	_, ok := self.Val.(error)
+	return ok
+}
+
 // Special list checking function. Something is considered
 // a list if it's of type []interface{}. The list is usually
 // used in conjunction with rlp decoded streams.