Moved Ext ethereum api

Moved the external ethereum api which can be used by any 3rd party
application.

2 files changed, 190 insertions, 0 deletions

diff --git a/utils/ethereum.go b/utils/ethereum.go
new file mode 100644
index 000000000..c383c4c91
--- /dev/null
+++ b/utils/ethereum.go
@@ -0,0 +1,107 @@
+package utils
+
+import (
+	"github.com/ethereum/eth-go"
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethutil"
+)
+
+type PEthereum struct {
+	stateManager *ethchain.StateManager
+	blockChain   *ethchain.BlockChain
+	txPool       *ethchain.TxPool
+}
+
+func NewPEthereum(eth *eth.Ethereum) *PEthereum {
+	return &PEthereum{
+		eth.StateManager(),
+		eth.BlockChain(),
+		eth.TxPool(),
+	}
+}
+
+func (lib *PEthereum) GetBlock(hexHash string) *PBlock {
+	hash := ethutil.FromHex(hexHash)
+
+	block := lib.blockChain.GetBlock(hash)
+
+	return &PBlock{Number: int(block.BlockInfo().Number), Hash: ethutil.Hex(block.Hash())}
+}
+
+func (lib *PEthereum) GetKey() string {
+	return ethutil.Hex(ethutil.Config.Db.GetKeys()[0].Address())
+}
+
+func (lib *PEthereum) GetStateObject(address string) *PStateObject {
+	stateObject := lib.stateManager.ProcState().GetContract(ethutil.FromHex(address))
+	if stateObject != nil {
+		return NewPStateObject(stateObject)
+	}
+
+	// See GetStorage for explanation on "nil"
+	return NewPStateObject(nil)
+}
+
+func (lib *PEthereum) Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr string) (string, error) {
+	return lib.createTx(key, recipient, valueStr, gasStr, gasPriceStr, dataStr, "")
+}
+
+func (lib *PEthereum) Create(key, valueStr, gasStr, gasPriceStr, initStr, bodyStr string) (string, error) {
+	return lib.createTx(key, "", valueStr, gasStr, gasPriceStr, initStr, bodyStr)
+}
+
+func (lib *PEthereum) createTx(key, recipient, valueStr, gasStr, gasPriceStr, initStr, scriptStr string) (string, error) {
+	var hash []byte
+	var contractCreation bool
+	if len(recipient) == 0 {
+		contractCreation = true
+	} else {
+		hash = ethutil.FromHex(recipient)
+	}
+
+	keyPair, err := ethchain.NewKeyPairFromSec([]byte(key))
+	if err != nil {
+		return "", err
+	}
+
+	value := ethutil.Big(valueStr)
+	gas := ethutil.Big(gasStr)
+	gasPrice := ethutil.Big(gasPriceStr)
+	var tx *ethchain.Transaction
+	// Compile and assemble the given data
+	if contractCreation {
+		initScript, err := Compile(initStr)
+		if err != nil {
+			return "", err
+		}
+		mainScript, err := Compile(scriptStr)
+		if err != nil {
+			return "", err
+		}
+
+		tx = ethchain.NewContractCreationTx(value, gas, gasPrice, mainScript, initScript)
+	} else {
+		/*
+			lines := strings.Split(dataStr, "\n")
+			var data []byte
+			for _, line := range lines {
+				data = append(data, ethutil.BigToBytes(ethutil.Big(line), 256)...)
+			}
+		*/
+
+		tx = ethchain.NewTransactionMessage(hash, value, gas, gasPrice, []byte(initStr))
+	}
+
+	acc := lib.stateManager.GetAddrState(keyPair.Address())
+	tx.Nonce = acc.Nonce
+	tx.Sign(keyPair.PrivateKey)
+	lib.txPool.QueueTransaction(tx)
+
+	if contractCreation {
+		ethutil.Config.Log.Infof("Contract addr %x", tx.Hash()[12:])
+	} else {
+		ethutil.Config.Log.Infof("Tx hash %x", tx.Hash())
+	}
+
+	return ethutil.Hex(tx.Hash()), nil
+}
diff --git a/utils/types.go b/utils/types.go
new file mode 100644
index 000000000..44264aa5e
--- /dev/null
+++ b/utils/types.go
@@ -0,0 +1,83 @@
+package utils
+
+import (
+	"encoding/hex"
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethutil"
+)
+
+// Block interface exposed to QML
+type PBlock struct {
+	Number int
+	Hash   string
+}
+
+// Creates a new QML Block from a chain block
+func NewPBlock(block *ethchain.Block) *PBlock {
+	info := block.BlockInfo()
+	hash := hex.EncodeToString(block.Hash())
+
+	return &PBlock{Number: int(info.Number), Hash: hash}
+}
+
+type PTx struct {
+	Value, Hash, Address string
+	Contract             bool
+}
+
+func NewPTx(tx *ethchain.Transaction) *PTx {
+	hash := hex.EncodeToString(tx.Hash())
+	sender := hex.EncodeToString(tx.Recipient)
+	isContract := len(tx.Data) > 0
+
+	return &PTx{Hash: hash, Value: ethutil.CurrencyToString(tx.Value), Address: sender, Contract: isContract}
+}
+
+type PKey struct {
+	Address string
+}
+
+type PKeyRing struct {
+	Keys []interface{}
+}
+
+func NewPKeyRing(keys []interface{}) *PKeyRing {
+	return &PKeyRing{Keys: keys}
+}
+
+type PStateObject struct {
+	object *ethchain.StateObject
+}
+
+func NewPStateObject(object *ethchain.StateObject) *PStateObject {
+	return &PStateObject{object: object}
+}
+
+func (c *PStateObject) GetStorage(address string) string {
+	// Because somehow, even if you return nil to QML it
+	// still has some magical object so we can't rely on
+	// undefined or null at the QML side
+	if c.object != nil {
+		val := c.object.GetMem(ethutil.Big("0x" + address))
+
+		return val.BigInt().String()
+	}
+
+	return ""
+}
+
+func (c *PStateObject) Value() string {
+	if c.object != nil {
+		return c.object.Amount.String()
+	}
+
+	return ""
+}
+
+func (c *PStateObject) Address() string {
+	if c.object != nil {
+		return ethutil.Hex(c.object.Address())
+	}
+
+	return ""
+}