Moved Ext ethereum api

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

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 ""
+}