Added general Pipe API

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
+}