package ethchain
import (
"fmt"
"github.com/ethereum/eth-go/ethutil"
"math/big"
"time"
)
type BlockInfo struct {
Number uint64
Hash []byte
Parent []byte
}
func (bi *BlockInfo) RlpDecode(data []byte) {
decoder := ethutil.NewValueFromBytes(data)
bi.Number = decoder.Get(0).Uint()
bi.Hash = decoder.Get(1).Bytes()
bi.Parent = decoder.Get(2).Bytes()
}
func (bi *BlockInfo) RlpEncode() []byte {
return ethutil.Encode([]interface{}{bi.Number, bi.Hash, bi.Parent})
}
type Block struct {
// Hash to the previous block
PrevHash []byte
// Uncles of this block
Uncles []*Block
UncleSha []byte
// The coin base address
Coinbase []byte
// Block Trie state
state *ethutil.Trie
// Difficulty for the current block
Difficulty *big.Int
// Creation time
Time int64
// Extra data
Extra string
// Block Nonce for verification
Nonce []byte
// List of transactions and/or contracts
transactions []*Transaction
TxSha []byte
}
// New block takes a raw encoded string
// XXX DEPRICATED
func NewBlockFromData(raw []byte) *Block {
return NewBlockFromBytes(raw)
}
func NewBlockFromBytes(raw []byte) *Block {
block := &Block{}
block.RlpDecode(raw)
return block
}
// New block takes a raw encoded string
func NewBlockFromRlpValue(rlpValue *ethutil.Value) *Block {
block := &Block{}
block.RlpValueDecode(rlpValue)
return block
}
func CreateBlock(root interface{},
prevHash []byte,
base []byte,
Difficulty *big.Int,
Nonce []byte,
extra string,
txes []*Transaction) *Block {
block := &Block{
// Slice of transactions to include in this block
transactions: txes,
PrevHash: prevHash,
Coinbase: base,
Difficulty: Difficulty,
Nonce: Nonce,
Time: time.Now().Unix(),
Extra: extra,
UncleSha: EmptyShaList,
}
block.SetTransactions(txes)
block.SetUncles([]*Block{})
block.state = ethutil.NewTrie(ethutil.Config.Db, root)
for _, tx := range txes {
block.MakeContract(tx)
}
return block
}
// Returns a hash of the block
func (block *Block) Hash() []byte {
return ethutil.Sha3Bin(block.Value().Encode())
}
func (block *Block) HashNoNonce() []byte {
return ethutil.Sha3Bin(ethutil.Encode([]interface{}{block.PrevHash, block.UncleSha, block.Coinbase, block.state.Root, block.TxSha, block.Difficulty, block.Time, block.Extra}))
}
func (block *Block) PrintHash() {
fmt.Println(block)
fmt.Println(ethutil.NewValue(ethutil.Encode([]interface{}{block.PrevHash, block.UncleSha, block.Coinbase, block.state.Root, block.TxSha, block.Difficulty, block.Time, block.Extra, block.Nonce})))
}
func (block *Block) State() *ethutil.Trie {
return block.state
}
func (block *Block) Transactions() []*Transaction {
return block.transactions
}
func (block *Block) GetContract(addr []byte) *Contract {
data := block.state.Get(string(addr))
if data == "" {
return nil
}
contract := &Contract{}
contract.RlpDecode([]byte(data))
return contract
}
func (block *Block) UpdateContract(addr []byte, contract *Contract) {
// Make sure the state is synced
contract.State().Sync()
block.state.Update(string(addr), string(contract.RlpEncode()))
}
func (block *Block) GetAddr(addr []byte) *Address {
var address *Address
data := block.State().Get(string(addr))
if data == "" {
address = NewAddress(big.NewInt(0))
} else {
address = NewAddressFromData([]byte(data))
}
return address
}
func (block *Block) UpdateAddr(addr []byte, address *Address) {
block.state.Update(string(addr), string(address.RlpEncode()))
}
func (block *Block) PayFee(addr []byte, fee *big.Int) bool {
contract := block.GetContract(addr)
// If we can't pay the fee return
if contract == nil || contract.Amount.Cmp(fee) < 0 /* amount < fee */ {
fmt.Println("Contract has insufficient funds", contract.Amount, fee)
return false
}
base := new(big.Int)
contract.Amount = base.Sub(contract.Amount, fee)
block.state.Update(string(addr), string(contract.RlpEncode()))
data := block.state.Get(string(block.Coinbase))
// Get the ether (Coinbase) and add the fee (gief fee to miner)
ether := NewAddressFromData([]byte(data))
base = new(big.Int)
ether.Amount = base.Add(ether.Amount, fee)
block.state.Update(string(block.Coinbase), string(ether.RlpEncode()))
return true
}
func (block *Block) BlockInfo() BlockInfo {
bi := BlockInfo{}
data, _ := ethutil.Config.Db.Get(append(block.Hash(), []byte("Info")...))
bi.RlpDecode(data)
return bi
}
func (block *Block) MakeContract(tx *Transaction) {
// Create contract if there's no recipient
if tx.IsContract() {
addr := tx.Hash()
value := tx.Value
contract := NewContract(value, []byte(""))
block.state.Update(string(addr), string(contract.RlpEncode()))
for i, val := range tx.Data {
contract.state.Update(string(ethutil.NumberToBytes(uint64(i), 32)), val)
}
block.UpdateContract(addr, contract)
}
}
/////// Block Encoding
func (block *Block) encodedUncles() interface{} {
uncles := make([]interface{}, len(block.Uncles))
for i, uncle := range block.Uncles {
uncles[i] = uncle.RlpEncode()
}
return uncles
}
func (block *Block) encodedTxs() interface{} {
// Marshal the transactions of this block
encTx := make([]interface{}, len(block.transactions))
for i, tx := range block.transactions {
// Cast it to a string (safe)
encTx[i] = tx.RlpData()
}
return encTx
}
func (block *Block) rlpTxs() interface{} {
// Marshal the transactions of this block
encTx := make([]interface{}, len(block.transactions))
for i, tx := range block.transactions {
// Cast it to a string (safe)
encTx[i] = tx.RlpData()
}
return encTx
}
func (block *Block) rlpUncles() interface{} {
// Marshal the transactions of this block
uncles := make([]interface{}, len(block.Uncles))
for i, uncle := range block.Uncles {
// Cast it to a string (safe)
uncles[i] = uncle.header()
}
return uncles
}
func (block *Block) SetUncles(uncles []*Block) {
block.Uncles = uncles
// Sha of the concatenated uncles
block.UncleSha = ethutil.Sha3Bin(ethutil.Encode(block.rlpUncles()))
}
func (block *Block) SetTransactions(txs []*Transaction) {
block.transactions = txs
block.TxSha = ethutil.Sha3Bin(ethutil.Encode(block.rlpTxs()))
}
func (block *Block) Value() *ethutil.Value {
return ethutil.NewValue([]interface{}{block.header(), block.rlpTxs(), block.rlpUncles()})
}
func (block *Block) RlpEncode() []byte {
// Encode a slice interface which contains the header and the list of
// transactions.
return block.Value().Encode()
}
func (block *Block) RlpDecode(data []byte) {
rlpValue := ethutil.NewValueFromBytes(data)
block.RlpValueDecode(rlpValue)
}
func (block *Block) RlpValueDecode(decoder *ethutil.Value) {
header := decoder.Get(0)
block.PrevHash = header.Get(0).Bytes()
block.UncleSha = header.Get(1).Bytes()
block.Coinbase = header.Get(2).Bytes()
block.state = ethutil.NewTrie(ethutil.Config.Db, header.Get(3).Val)
block.TxSha = header.Get(4).Bytes()
block.Difficulty = header.Get(5).BigInt()
block.Time = int64(header.Get(6).BigInt().Uint64())
block.Extra = header.Get(7).Str()
block.Nonce = header.Get(8).Bytes()
// Tx list might be empty if this is an uncle. Uncles only have their
// header set.
if decoder.Get(1).IsNil() == false { // Yes explicitness
txes := decoder.Get(1)
block.transactions = make([]*Transaction, txes.Len())
for i := 0; i < txes.Len(); i++ {
tx := NewTransactionFromValue(txes.Get(i))
block.transactions[i] = tx
/*
if ethutil.Config.Debug {
ethutil.Config.Db.Put(tx.Hash(), ethutil.Encode(tx))
}
*/
}
}
if decoder.Get(2).IsNil() == false { // Yes explicitness
uncles := decoder.Get(2)
block.Uncles = make([]*Block, uncles.Len())
for i := 0; i < uncles.Len(); i++ {
block.Uncles[i] = NewUncleBlockFromValue(uncles.Get(i))
}
}
}
func NewUncleBlockFromValue(header *ethutil.Value) *Block {
block := &Block{}
block.PrevHash = header.Get(0).Bytes()
block.UncleSha = header.Get(1).Bytes()
block.Coinbase = header.Get(2).Bytes()
block.state = ethutil.NewTrie(ethutil.Config.Db, header.Get(3).Val)
block.TxSha = header.Get(4).Bytes()
block.Difficulty = header.Get(5).BigInt()
block.Time = int64(header.Get(6).BigInt().Uint64())
block.Extra = header.Get(7).Str()
block.Nonce = header.Get(8).Bytes()
return block
}
func (block *Block) String() string {
return fmt.Sprintf("Block(%x):\nPrevHash:%x\nUncleSha:%x\nCoinbase:%x\nRoot:%x\nTxSha:%x\nDiff:%v\nTime:%d\nNonce:%x", block.Hash(), block.PrevHash, block.UncleSha, block.Coinbase, block.state.Root, block.TxSha, block.Difficulty, block.Time, block.Nonce)
}
//////////// UNEXPORTED /////////////////
func (block *Block) header() []interface{} {
return []interface{}{
// Sha of the previous block
block.PrevHash,
// Sha of uncles
block.UncleSha,
// Coinbase address
block.Coinbase,
// root state
block.state.Root,
// Sha of tx
block.TxSha,
// Current block Difficulty
block.Difficulty,
// Time the block was found?
block.Time,
// Extra data
block.Extra,
// Block's Nonce for validation
block.Nonce,
}
}
