Added public interface

3 files changed, 240 insertions, 0 deletions

diff --git a/ethpub/pub.go b/ethpub/pub.go
new file mode 100644
index 000000000..4950f6eb5
--- /dev/null
+++ b/ethpub/pub.go
@@ -0,0 +1,108 @@
+package ethpub
+
+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() *PKey {
+	keyPair, err := ethchain.NewKeyPairFromSec(ethutil.Config.Db.GetKeys()[0].PrivateKey)
+	if err != nil {
+		return nil
+	}
+
+	return NewPKey(keyPair)
+}
+
+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(ethutil.FromHex(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 := ethutil.Compile(initStr)
+		if err != nil {
+			return "", err
+		}
+		mainScript, err := ethutil.Compile(scriptStr)
+		if err != nil {
+			return "", err
+		}
+
+		tx = ethchain.NewContractCreationTx(value, gas, gasPrice, mainScript, initScript)
+	} else {
+		// Just in case it was submitted as a 0x prefixed string
+		if initStr[0:2] == "0x" {
+			initStr = initStr[2:len(initStr)]
+		}
+		tx = ethchain.NewTransactionMessage(hash, value, gas, gasPrice, ethutil.FromHex(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/ethpub/types.go b/ethpub/types.go
new file mode 100644
index 000000000..5e7e4613d
--- /dev/null
+++ b/ethpub/types.go
@@ -0,0 +1,91 @@
+package ethpub
+
+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
+	PrivateKey string
+	PublicKey  string
+}
+
+func NewPKey(key *ethchain.KeyPair) *PKey {
+	return &PKey{ethutil.Hex(key.Address()), ethutil.Hex(key.PrivateKey), ethutil.Hex(key.PublicKey)}
+}
+
+/*
+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 ""
+}
diff --git a/ethutil/script.go b/ethutil/script.go
new file mode 100644
index 000000000..620658025
--- /dev/null
+++ b/ethutil/script.go
@@ -0,0 +1,41 @@
+package ethutil
+
+import (
+	"fmt"
+	"github.com/obscuren/mutan"
+	"strings"
+)
+
+// General compile function
+func Compile(script string) ([]byte, error) {
+	byteCode, errors := mutan.Compile(strings.NewReader(script), false)
+	if len(errors) > 0 {
+		var errs string
+		for _, er := range errors {
+			if er != nil {
+				errs += er.Error()
+			}
+		}
+		return nil, fmt.Errorf("%v", errs)
+	}
+
+	return byteCode, nil
+}
+
+func CompileScript(script string) ([]byte, []byte, error) {
+	// Preprocess
+	mainInput, initInput := mutan.PreProcess(script)
+	// Compile main script
+	mainScript, err := Compile(mainInput)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// Compile init script
+	initScript, err := Compile(initInput)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return mainScript, initScript, nil
+}