path: root/ethpub/pub.go

package ethpub

import (
    "encoding/hex"
    "github.com/ethereum/eth-go/ethchain"
    "github.com/ethereum/eth-go/ethutil"
    "math/big"
    "strings"
    "sync/atomic"
)

type PEthereum struct {
    manager      ethchain.EthManager
    stateManager *ethchain.StateManager
    blockChain   *ethchain.BlockChain
    txPool       *ethchain.TxPool
}

func NewPEthereum(manager ethchain.EthManager) *PEthereum {
    return &PEthereum{
        manager,
        manager.StateManager(),
        manager.BlockChain(),
        manager.TxPool(),
    }
}

func (lib *PEthereum) GetBlock(hexHash string) *PBlock {
    hash := ethutil.FromHex(hexHash)
    block := lib.blockChain.GetBlock(hash)

    return NewPBlock(block)
}

func (lib *PEthereum) GetKey() *PKey {
    keyPair := ethutil.GetKeyRing().Get(0)

    return NewPKey(keyPair)
}

func (lib *PEthereum) GetStateObject(address string) *PStateObject {
    stateObject := lib.stateManager.CurrentState().GetStateObject(ethutil.FromHex(address))
    if stateObject != nil {
        return NewPStateObject(stateObject)
    }

    // See GetStorage for explanation on "nil"
    return NewPStateObject(nil)
}

func (lib *PEthereum) GetPeerCount() int {
    return lib.manager.PeerCount()
}

func (lib *PEthereum) GetPeers() []PPeer {
    var peers []PPeer
    for peer := lib.manager.Peers().Front(); peer != nil; peer = peer.Next() {
        p := peer.Value.(ethchain.Peer)
        // we only want connected peers
        if atomic.LoadInt32(p.Connected()) != 0 {
            peers = append(peers, *NewPPeer(p))
        }
    }

    return peers
}

func (lib *PEthereum) GetIsMining() bool {
    return lib.manager.IsMining()
}

func (lib *PEthereum) GetIsListening() bool {
    return lib.manager.IsListening()
}

func (lib *PEthereum) GetCoinBase() string {
    data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
    keyRing := ethutil.NewValueFromBytes(data)
    key := keyRing.Get(0).Bytes()

    return lib.SecretToAddress(hex.EncodeToString(key))
}

func (lib *PEthereum) GetStorage(address, storageAddress string) string {
    return lib.GetStateObject(address).GetStorage(storageAddress)
}

func (lib *PEthereum) GetTxCountAt(address string) int {
    return lib.GetStateObject(address).Nonce()
}

func (lib *PEthereum) IsContract(address string) bool {
    return lib.GetStateObject(address).IsContract()
}

func (lib *PEthereum) SecretToAddress(key string) string {
    pair, err := ethutil.NewKeyPairFromSec(ethutil.FromHex(key))
    if err != nil {
        return ""
    }

    return ethutil.Hex(pair.Address())
}

func (lib *PEthereum) Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr string) (*PReceipt, error) {
    return lib.createTx(key, recipient, valueStr, gasStr, gasPriceStr, dataStr)
}

func (lib *PEthereum) Create(key, valueStr, gasStr, gasPriceStr, script string) (*PReceipt, error) {
    return lib.createTx(key, "", valueStr, gasStr, gasPriceStr, script)
}

var namereg = ethutil.FromHex("bb5f186604d057c1c5240ca2ae0f6430138ac010")

func GetAddressFromNameReg(stateManager *ethchain.StateManager, name string) []byte {
    recp := new(big.Int).SetBytes([]byte(name))
    object := stateManager.CurrentState().GetStateObject(namereg)
    if object != nil {
        reg := object.GetStorage(recp)

        return reg.Bytes()
    }

    return nil
}

func (lib *PEthereum) createTx(key, recipient, valueStr, gasStr, gasPriceStr, scriptStr string) (*PReceipt, error) {
    var hash []byte
    var contractCreation bool
    if len(recipient) == 0 {
        contractCreation = true
    } else {
        // Check if an address is stored by this address
        addr := GetAddressFromNameReg(lib.stateManager, recipient)
        if len(addr) > 0 {
            hash = addr
        } else {
            hash = ethutil.FromHex(recipient)
        }
    }

    var keyPair *ethutil.KeyPair
    var err error
    if key[0:2] == "0x" {
        keyPair, err = ethutil.NewKeyPairFromSec([]byte(ethutil.FromHex(key[0:2])))
    } else {
        keyPair, err = ethutil.NewKeyPairFromSec([]byte(ethutil.FromHex(key)))
    }

    if err != nil {
        return nil, 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 {
        var script []byte
        var err error
        if ethutil.IsHex(scriptStr) {
            script = ethutil.FromHex(scriptStr)
        } else {
            script, err = ethutil.Compile(scriptStr)
            if err != nil {
                return nil, err
            }
        }

        tx = ethchain.NewContractCreationTx(value, gas, gasPrice, script)
    } else {
        // Just in case it was submitted as a 0x prefixed string
        if len(scriptStr) > 0 && scriptStr[0:2] == "0x" {
            scriptStr = scriptStr[2:len(scriptStr)]
        }

        data := ethutil.StringToByteFunc(scriptStr, 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, gas, gasPrice, data)
    }

    acc := lib.stateManager.TransState().GetStateObject(keyPair.Address())
    tx.Nonce = acc.Nonce
    acc.Nonce += 1
    lib.stateManager.TransState().UpdateStateObject(acc)

    tx.Sign(keyPair.PrivateKey)
    lib.txPool.QueueTransaction(tx)

    if contractCreation {
        ethutil.Config.Log.Infof("Contract addr %x", tx.CreationAddress())
    }

    return NewPReciept(contractCreation, tx.CreationAddress(), tx.Hash(), keyPair.Address()), nil
}