package ethchain import ( "bytes" "fmt" "github.com/ethereum/eth-go/ethutil" "math/big" "strconv" "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 state *State // Difficulty for the current block Difficulty *big.Int // Creation time Time int64 // The block number Number *big.Int // Minimum Gas Price MinGasPrice *big.Int // Gas limit GasLimit *big.Int // Gas used GasUsed *big.Int // Extra data Extra string // Block Nonce for verification Nonce []byte // List of transactions and/or contracts transactions []*Transaction receipts []*Receipt 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) *Block { block := &Block{ PrevHash: prevHash, Coinbase: base, Difficulty: Difficulty, Nonce: Nonce, Time: time.Now().Unix(), Extra: extra, UncleSha: EmptyShaList, GasUsed: new(big.Int), MinGasPrice: new(big.Int), GasLimit: new(big.Int), } block.SetUncles([]*Block{}) block.state = NewState(ethutil.NewTrie(ethutil.Config.Db, root)) 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.trie.Root, block.TxSha, block.Difficulty, block.Number, block.MinGasPrice, block.GasLimit, block.GasUsed, block.Time, block.Extra})) } func (block *Block) State() *State { return block.state } func (block *Block) Transactions() []*Transaction { return block.transactions } func (block *Block) PayFee(addr []byte, fee *big.Int) bool { contract := block.state.GetStateObject(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.trie.Update(string(addr), string(contract.RlpEncode())) data := block.state.trie.Get(string(block.Coinbase)) // Get the ether (Coinbase) and add the fee (gief fee to miner) account := NewStateObjectFromBytes(block.Coinbase, []byte(data)) base = new(big.Int) account.Amount = base.Add(account.Amount, fee) //block.state.trie.Update(string(block.Coinbase), string(ether.RlpEncode())) block.state.UpdateStateObject(account) return true } func (block *Block) CalcGasLimit(parent *Block) *big.Int { if block.Number == big.NewInt(0) { return ethutil.BigPow(10, 6) } previous := new(big.Int).Mul(big.NewInt(1023), parent.GasLimit) current := new(big.Rat).Mul(new(big.Rat).SetInt(block.GasUsed), big.NewRat(6, 5)) curInt := new(big.Int).Div(current.Num(), current.Denom()) result := new(big.Int).Add(previous, curInt) result.Div(result, big.NewInt(1024)) min := ethutil.BigPow(10, 4) return ethutil.BigMax(min, result) /* base := new(big.Int) base2 := new(big.Int) parentGL := bc.CurrentBlock.GasLimit parentUsed := bc.CurrentBlock.GasUsed base.Mul(parentGL, big.NewInt(1024-1)) base2.Mul(parentUsed, big.NewInt(6)) base2.Div(base2, big.NewInt(5)) base.Add(base, base2) base.Div(base, big.NewInt(1024)) */ } func (block *Block) BlockInfo() BlockInfo { bi := BlockInfo{} data, _ := ethutil.Config.Db.Get(append(block.Hash(), []byte("Info")...)) bi.RlpDecode(data) return bi } func (self *Block) GetTransaction(hash []byte) *Transaction { for _, receipt := range self.receipts { if bytes.Compare(receipt.Tx.Hash(), hash) == 0 { return receipt.Tx } } return nil } // Sync the block's state and contract respectively func (block *Block) Sync() { block.state.Sync() } func (block *Block) Undo() { // Sync the block state itself block.state.Reset() } /////// Block Encoding func (block *Block) rlpReceipts() interface{} { // Marshal the transactions of this block encR := make([]interface{}, len(block.receipts)) for i, r := range block.receipts { // Cast it to a string (safe) encR[i] = r.RlpData() } return encR } 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 (self *Block) SetReceipts(receipts []*Receipt, txs []*Transaction) { self.receipts = receipts self.setTransactions(txs) } func (block *Block) setTransactions(txs []*Transaction) { block.transactions = txs trie := ethutil.NewTrie(ethutil.Config.Db, "") for i, tx := range txs { trie.Update(strconv.Itoa(i), string(tx.RlpEncode())) } switch trie.Root.(type) { case string: block.TxSha = []byte(trie.Root.(string)) case []byte: block.TxSha = trie.Root.([]byte) default: panic(fmt.Sprintf("invalid root type %T", trie.Root)) } } func (block *Block) Value() *ethutil.Value { return ethutil.NewValue([]interface{}{block.header(), block.rlpReceipts(), 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 = NewState(ethutil.NewTrie(ethutil.Config.Db, header.Get(3).Val)) block.TxSha = header.Get(4).Bytes() block.Difficulty = header.Get(5).BigInt() block.Number = header.Get(6).BigInt() //fmt.Printf("#%v : %x\n", block.Number, block.Coinbase) block.MinGasPrice = header.Get(7).BigInt() block.GasLimit = header.Get(8).BigInt() block.GasUsed = header.Get(9).BigInt() block.Time = int64(header.Get(10).BigInt().Uint64()) block.Extra = header.Get(11).Str() block.Nonce = header.Get(12).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 receipts := decoder.Get(1) block.transactions = make([]*Transaction, receipts.Len()) block.receipts = make([]*Receipt, receipts.Len()) for i := 0; i < receipts.Len(); i++ { receipt := NewRecieptFromValue(receipts.Get(i)) block.transactions[i] = receipt.Tx block.receipts[i] = receipt } } 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 = NewState(ethutil.NewTrie(ethutil.Config.Db, header.Get(3).Val)) block.TxSha = header.Get(4).Bytes() block.Difficulty = header.Get(5).BigInt() block.Number = header.Get(6).BigInt() block.MinGasPrice = header.Get(7).BigInt() block.GasLimit = header.Get(8).BigInt() block.GasUsed = header.Get(9).BigInt() block.Time = int64(header.Get(10).BigInt().Uint64()) block.Extra = header.Get(11).Str() block.Nonce = header.Get(12).Bytes() return block } func (block *Block) GetRoot() interface{} { return block.state.trie.Root } func (self *Block) Receipts() []*Receipt { return self.receipts } 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.trie.Root, // Sha of tx block.TxSha, // Current block Difficulty block.Difficulty, // The block number block.Number, // Block minimum gas price block.MinGasPrice, // Block upper gas bound block.GasLimit, // Block gas used block.GasUsed, // Time the block was found? block.Time, // Extra data block.Extra, // Block's Nonce for validation block.Nonce, } } func (block *Block) String() string { return fmt.Sprintf(` BLOCK(%x): PrevHash: %x UncleSha: %x Coinbase: %x Root: %x TxSha: %x Difficulty: %v Number: %v MinGas: %v MaxLimit: %v GasUsed: %v Time: %v Extra: %v Nonce: %x NumTx: %v `, block.Hash(), block.PrevHash, block.UncleSha, block.Coinbase, block.state.trie.Root, block.TxSha, block.Difficulty, block.Number, block.MinGasPrice, block.GasLimit, block.GasUsed, block.Time, block.Extra, block.Nonce, len(block.transactions), ) }