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package xeth

import (
    "bytes"
    "fmt"
    "strings"

    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/ethutil"
    "github.com/ethereum/go-ethereum/p2p"
    "github.com/ethereum/go-ethereum/rlp"
    "github.com/ethereum/go-ethereum/state"
)

func toHex(b []byte) string {
    return "0x" + ethutil.Bytes2Hex(b)
}
func fromHex(s string) []byte {
    if len(s) > 1 {
        if s[0:2] == "0x" {
            s = s[2:]
        }
        return ethutil.Hex2Bytes(s)
    }
    return nil
}

type Object struct {
    *state.StateObject
}

func NewObject(state *state.StateObject) *Object {
    return &Object{state}
}

func (self *Object) StorageString(str string) *ethutil.Value {
    if ethutil.IsHex(str) {
        return self.storage(ethutil.Hex2Bytes(str[2:]))
    } else {
        return self.storage(ethutil.RightPadBytes([]byte(str), 32))
    }
}

func (self *Object) StorageValue(addr *ethutil.Value) *ethutil.Value {
    return self.storage(addr.Bytes())
}

func (self *Object) storage(addr []byte) *ethutil.Value {
    return self.StateObject.GetStorage(ethutil.BigD(addr))
}

func (self *Object) Storage() (storage map[string]string) {
    storage = make(map[string]string)

    it := self.StateObject.Trie().Iterator()
    for it.Next() {
        var data []byte
        rlp.Decode(bytes.NewReader(it.Value), &data)
        storage[toHex(it.Key)] = toHex(data)
    }
    self.StateObject.Trie().PrintRoot()

    return
}

// Block interface exposed to QML
type Block struct {
    //Transactions string `json:"transactions"`
    ref          *types.Block
    Size         string        `json:"size"`
    Number       int           `json:"number"`
    Hash         string        `json:"hash"`
    Transactions *ethutil.List `json:"transactions"`
    Uncles       *ethutil.List `json:"uncles"`
    Time         int64         `json:"time"`
    Coinbase     string        `json:"coinbase"`
    Name         string        `json:"name"`
    GasLimit     string        `json:"gasLimit"`
    GasUsed      string        `json:"gasUsed"`
    PrevHash     string        `json:"prevHash"`
    Bloom        string        `json:"bloom"`
    Raw          string        `json:"raw"`
}

// Creates a new QML Block from a chain block
func NewBlock(block *types.Block) *Block {
    if block == nil {
        return &Block{}
    }

    ptxs := make([]*Transaction, len(block.Transactions()))
    for i, tx := range block.Transactions() {
        ptxs[i] = NewTx(tx)
    }
    txlist := ethutil.NewList(ptxs)

    puncles := make([]*Block, len(block.Uncles()))
    for i, uncle := range block.Uncles() {
        puncles[i] = NewBlock(types.NewBlockWithHeader(uncle))
    }
    ulist := ethutil.NewList(puncles)

    return &Block{
        ref: block, Size: block.Size().String(),
        Number: int(block.NumberU64()), GasUsed: block.GasUsed().String(),
        GasLimit: block.GasLimit().String(), Hash: toHex(block.Hash()),
        Transactions: txlist, Uncles: ulist,
        Time:     block.Time(),
        Coinbase: toHex(block.Coinbase()),
        PrevHash: toHex(block.ParentHash()),
        Bloom:    toHex(block.Bloom()),
        Raw:      block.String(),
    }
}

func (self *Block) ToString() string {
    if self.ref != nil {
        return self.ref.String()
    }

    return ""
}

func (self *Block) GetTransaction(hash string) *Transaction {
    tx := self.ref.Transaction(fromHex(hash))
    if tx == nil {
        return nil
    }

    return NewTx(tx)
}

type Transaction struct {
    ref *types.Transaction

    Value           string `json:"value"`
    Gas             string `json:"gas"`
    GasPrice        string `json:"gasPrice"`
    Hash            string `json:"hash"`
    Address         string `json:"address"`
    Sender          string `json:"sender"`
    RawData         string `json:"rawData"`
    Data            string `json:"data"`
    Contract        bool   `json:"isContract"`
    CreatesContract bool   `json:"createsContract"`
    Confirmations   int    `json:"confirmations"`
}

func NewTx(tx *types.Transaction) *Transaction {
    hash := toHex(tx.Hash())
    receiver := toHex(tx.To())
    if receiver == "0000000000000000000000000000000000000000" {
        receiver = toHex(core.AddressFromMessage(tx))
    }
    sender := toHex(tx.From())
    createsContract := core.MessageCreatesContract(tx)

    var data string
    if createsContract {
        data = strings.Join(core.Disassemble(tx.Data()), "\n")
    } else {
        data = toHex(tx.Data())
    }

    return &Transaction{ref: tx, Hash: hash, Value: ethutil.CurrencyToString(tx.Value()), Address: receiver, Contract: createsContract, Gas: tx.Gas().String(), GasPrice: tx.GasPrice().String(), Data: data, Sender: sender, CreatesContract: createsContract, RawData: toHex(tx.Data())}
}

func (self *Transaction) ToString() string {
    return self.ref.String()
}

type Key struct {
    Address    string `json:"address"`
    PrivateKey string `json:"privateKey"`
    PublicKey  string `json:"publicKey"`
}

func NewKey(key *crypto.KeyPair) *Key {
    return &Key{toHex(key.Address()), toHex(key.PrivateKey), toHex(key.PublicKey)}
}

type PReceipt struct {
    CreatedContract bool   `json:"createdContract"`
    Address         string `json:"address"`
    Hash            string `json:"hash"`
    Sender          string `json:"sender"`
}

func NewPReciept(contractCreation bool, creationAddress, hash, address []byte) *PReceipt {
    return &PReceipt{
        contractCreation,
        toHex(creationAddress),
        toHex(hash),
        toHex(address),
    }
}

// Peer interface exposed to QML

type Peer struct {
    ref     *p2p.Peer
    Ip      string `json:"ip"`
    Version string `json:"version"`
    Caps    string `json:"caps"`
}

func NewPeer(peer *p2p.Peer) *Peer {
    var caps []string
    for _, cap := range peer.Caps() {
        caps = append(caps, fmt.Sprintf("%s/%d", cap.Name, cap.Version))
    }

    return &Peer{
        ref:     peer,
        Ip:      fmt.Sprintf("%v", peer.RemoteAddr()),
        Version: fmt.Sprintf("%v", peer.ID()),
        Caps:    fmt.Sprintf("%v", caps),
    }
}

type Receipt struct {
    CreatedContract bool   `json:"createdContract"`
    Address         string `json:"address"`
    Hash            string `json:"hash"`
    Sender          string `json:"sender"`
}

func NewReciept(contractCreation bool, creationAddress, hash, address []byte) *Receipt {
    return &Receipt{
        contractCreation,
        toHex(creationAddress),
        toHex(hash),
        toHex(address),
    }
}

type Message struct {
    To        string `json:"to"`
    From      string `json:"from"`
    Input     string `json:"input"`
    Output    string `json:"output"`
    Path      int32  `json:"path"`
    Origin    string `json:"origin"`
    Timestamp int32  `json:"timestamp"`
    Coinbase  string `json:"coinbase"`
    Block     string `json:"block"`
    Number    int32  `json:"number"`
    Value     string `json:"value"`
}

func NewMessage(message *state.Message) Message {
    return Message{
        To:        toHex(message.To),
        From:      toHex(message.From),
        Input:     toHex(message.Input),
        Output:    toHex(message.Output),
        Path:      int32(message.Path),
        Origin:    toHex(message.Origin),
        Timestamp: int32(message.Timestamp),
        Coinbase:  toHex(message.Origin),
        Block:     toHex(message.Block),
        Number:    int32(message.Number.Int64()),
        Value:     message.Value.String(),
    }
}