From 0ed1a8b50a9b9726cd57a2731d0405f6949c6188 Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Fri, 31 Oct 2014 14:30:08 +0100
Subject: ethpipe => xeth (eXtended ETHereum)

---
 xeth/pipe.go | 175 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 175 insertions(+)
 create mode 100644 xeth/pipe.go

(limited to 'xeth/pipe.go')

diff --git a/xeth/pipe.go b/xeth/pipe.go
new file mode 100644
index 000000000..f2759d660
--- /dev/null
+++ b/xeth/pipe.go
@@ -0,0 +1,175 @@
+package xeth
+
+/*
+ * eXtended ETHereum
+ */
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/ethereum/go-ethereum/chain"
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/ethstate"
+	"github.com/ethereum/go-ethereum/ethutil"
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/vm"
+)
+
+var pipelogger = logger.NewLogger("XETH")
+
+type VmVars struct {
+	State *ethstate.State
+}
+
+type XEth struct {
+	obj          chain.EthManager
+	stateManager *chain.StateManager
+	blockChain   *chain.ChainManager
+	world        *World
+
+	Vm VmVars
+}
+
+func New(obj chain.EthManager) *XEth {
+	pipe := &XEth{
+		obj:          obj,
+		stateManager: obj.StateManager(),
+		blockChain:   obj.ChainManager(),
+	}
+	pipe.world = NewWorld(pipe)
+
+	return pipe
+}
+
+func (self *XEth) Balance(addr []byte) *ethutil.Value {
+	return ethutil.NewValue(self.World().safeGet(addr).Balance)
+}
+
+func (self *XEth) Nonce(addr []byte) uint64 {
+	return self.World().safeGet(addr).Nonce
+}
+
+func (self *XEth) Execute(addr []byte, data []byte, value, gas, price *ethutil.Value) ([]byte, error) {
+	return self.ExecuteObject(&Object{self.World().safeGet(addr)}, data, value, gas, price)
+}
+
+func (self *XEth) ExecuteObject(object *Object, data []byte, value, gas, price *ethutil.Value) ([]byte, error) {
+	var (
+		initiator = ethstate.NewStateObject(self.obj.KeyManager().KeyPair().Address())
+		block     = self.blockChain.CurrentBlock
+	)
+
+	self.Vm.State = self.World().State().Copy()
+
+	evm := vm.New(NewEnv(self.Vm.State, block, value.BigInt(), initiator.Address()), vm.Type(ethutil.Config.VmType))
+
+	msg := vm.NewExecution(evm, object.Address(), data, gas.BigInt(), price.BigInt(), value.BigInt())
+	ret, err := msg.Exec(object.Address(), initiator)
+
+	fmt.Println("returned from call", ret, err)
+
+	return ret, err
+}
+
+func (self *XEth) Block(hash []byte) *chain.Block {
+	return self.blockChain.GetBlock(hash)
+}
+
+func (self *XEth) Storage(addr, storageAddr []byte) *ethutil.Value {
+	return self.World().safeGet(addr).GetStorage(ethutil.BigD(storageAddr))
+}
+
+func (self *XEth) ToAddress(priv []byte) []byte {
+	pair, err := crypto.NewKeyPairFromSec(priv)
+	if err != nil {
+		return nil
+	}
+
+	return pair.Address()
+}
+
+func (self *XEth) Exists(addr []byte) bool {
+	return self.World().Get(addr) != nil
+}
+
+func (self *XEth) TransactString(key *crypto.KeyPair, rec string, value, gas, price *ethutil.Value, data []byte) ([]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 *XEth) Transact(key *crypto.KeyPair, rec []byte, value, gas, price *ethutil.Value, data []byte) ([]byte, error) {
+	var hash []byte
+	var contractCreation bool
+	if rec == nil {
+		contractCreation = true
+	}
+
+	var tx *chain.Transaction
+	// Compile and assemble the given data
+	if contractCreation {
+		script, err := ethutil.Compile(string(data), false)
+		if err != nil {
+			return nil, err
+		}
+
+		tx = chain.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 = chain.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 {
+		addr := tx.CreationAddress(self.World().State())
+		pipelogger.Infof("Contract addr %x\n", addr)
+
+		return addr, nil
+	}
+
+	return tx.Hash(), nil
+}
+
+func (self *XEth) PushTx(tx *chain.Transaction) ([]byte, error) {
+	self.obj.TxPool().QueueTransaction(tx)
+	if tx.Recipient == nil {
+		addr := tx.CreationAddress(self.World().State())
+		pipelogger.Infof("Contract addr %x\n", addr)
+		return addr, nil
+	}
+	return tx.Hash(), nil
+}
+
+func (self *XEth) CompileMutan(code string) ([]byte, error) {
+	data, err := ethutil.Compile(code, false)
+	if err != nil {
+		return nil, err
+	}
+
+	return data, nil
+}
-- 
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