mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-25 12:57:17 +00:00
387 lines
8.9 KiB
Go
387 lines
8.9 KiB
Go
package ethchain
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import (
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"bytes"
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"fmt"
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"math/big"
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_ "strconv"
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"time"
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"github.com/ethereum/eth-go/ethcrypto"
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"github.com/ethereum/eth-go/ethstate"
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"github.com/ethereum/eth-go/ethtrie"
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"github.com/ethereum/eth-go/ethutil"
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)
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type BlockInfo struct {
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Number uint64
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Hash []byte
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Parent []byte
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}
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func (bi *BlockInfo) RlpDecode(data []byte) {
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decoder := ethutil.NewValueFromBytes(data)
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bi.Number = decoder.Get(0).Uint()
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bi.Hash = decoder.Get(1).Bytes()
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bi.Parent = decoder.Get(2).Bytes()
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}
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func (bi *BlockInfo) RlpEncode() []byte {
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return ethutil.Encode([]interface{}{bi.Number, bi.Hash, bi.Parent})
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}
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type Block struct {
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// Hash to the previous block
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PrevHash []byte
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// Uncles of this block
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Uncles []*Block
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UncleSha []byte
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// The coin base address
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Coinbase []byte
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// Block Trie state
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//state *ethutil.Trie
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state *ethstate.State
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// Difficulty for the current block
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Difficulty *big.Int
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// Creation time
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Time int64
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// The block number
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Number *big.Int
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// Minimum Gas Price
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MinGasPrice *big.Int
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// Gas limit
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GasLimit *big.Int
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// Gas used
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GasUsed *big.Int
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// Extra data
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Extra string
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// Block Nonce for verification
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Nonce []byte
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// List of transactions and/or contracts
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transactions []*Transaction
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receipts []*Receipt
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TxSha []byte
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}
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func NewBlockFromBytes(raw []byte) *Block {
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block := &Block{}
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block.RlpDecode(raw)
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return block
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}
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// New block takes a raw encoded string
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func NewBlockFromRlpValue(rlpValue *ethutil.Value) *Block {
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block := &Block{}
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block.RlpValueDecode(rlpValue)
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return block
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}
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func CreateBlock(root interface{},
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prevHash []byte,
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base []byte,
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Difficulty *big.Int,
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Nonce []byte,
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extra string) *Block {
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block := &Block{
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PrevHash: prevHash,
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Coinbase: base,
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Difficulty: Difficulty,
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Nonce: Nonce,
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Time: time.Now().Unix(),
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Extra: extra,
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UncleSha: EmptyShaList,
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GasUsed: new(big.Int),
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MinGasPrice: new(big.Int),
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GasLimit: new(big.Int),
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}
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block.SetUncles([]*Block{})
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block.state = ethstate.New(ethtrie.New(ethutil.Config.Db, root))
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return block
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}
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// Returns a hash of the block
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func (block *Block) Hash() []byte {
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return ethcrypto.Sha3Bin(block.Value().Encode())
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}
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func (block *Block) HashNoNonce() []byte {
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return ethcrypto.Sha3Bin(ethutil.Encode([]interface{}{block.PrevHash,
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block.UncleSha, block.Coinbase, block.state.Trie.Root,
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block.TxSha, block.Difficulty, block.Number, block.MinGasPrice,
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block.GasLimit, block.GasUsed, block.Time, block.Extra}))
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}
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func (block *Block) State() *ethstate.State {
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return block.state
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}
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func (block *Block) Transactions() []*Transaction {
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return block.transactions
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}
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func (block *Block) CalcGasLimit(parent *Block) *big.Int {
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if block.Number.Cmp(big.NewInt(0)) == 0 {
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return ethutil.BigPow(10, 6)
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}
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// ((1024-1) * parent.gasLimit + (gasUsed * 6 / 5)) / 1024
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previous := new(big.Int).Mul(big.NewInt(1024-1), parent.GasLimit)
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current := new(big.Rat).Mul(new(big.Rat).SetInt(parent.GasUsed), big.NewRat(6, 5))
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curInt := new(big.Int).Div(current.Num(), current.Denom())
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result := new(big.Int).Add(previous, curInt)
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result.Div(result, big.NewInt(1024))
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min := big.NewInt(125000)
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return ethutil.BigMax(min, result)
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}
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func (block *Block) BlockInfo() BlockInfo {
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bi := BlockInfo{}
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data, _ := ethutil.Config.Db.Get(append(block.Hash(), []byte("Info")...))
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bi.RlpDecode(data)
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return bi
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}
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func (self *Block) GetTransaction(hash []byte) *Transaction {
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for _, receipt := range self.receipts {
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if bytes.Compare(receipt.Tx.Hash(), hash) == 0 {
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return receipt.Tx
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}
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}
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return nil
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}
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// Sync the block's state and contract respectively
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func (block *Block) Sync() {
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block.state.Sync()
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}
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func (block *Block) Undo() {
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// Sync the block state itself
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block.state.Reset()
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}
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/////// Block Encoding
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func (block *Block) rlpReceipts() interface{} {
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// Marshal the transactions of this block
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encR := make([]interface{}, len(block.receipts))
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for i, r := range block.receipts {
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// Cast it to a string (safe)
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encR[i] = r.RlpData()
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}
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return encR
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}
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func (block *Block) rlpUncles() interface{} {
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// Marshal the transactions of this block
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uncles := make([]interface{}, len(block.Uncles))
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for i, uncle := range block.Uncles {
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// Cast it to a string (safe)
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uncles[i] = uncle.header()
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}
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return uncles
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}
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func (block *Block) SetUncles(uncles []*Block) {
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block.Uncles = uncles
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// Sha of the concatenated uncles
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block.UncleSha = ethcrypto.Sha3Bin(ethutil.Encode(block.rlpUncles()))
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}
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func (self *Block) SetReceipts(receipts []*Receipt, txs []*Transaction) {
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self.receipts = receipts
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self.setTransactions(txs)
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}
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func (block *Block) setTransactions(txs []*Transaction) {
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block.transactions = txs
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}
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func CreateTxSha(receipts Receipts) (sha []byte) {
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trie := ethtrie.New(ethutil.Config.Db, "")
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for i, receipt := range receipts {
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trie.Update(string(ethutil.NewValue(i).Encode()), string(ethutil.NewValue(receipt.RlpData()).Encode()))
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}
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switch trie.Root.(type) {
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case string:
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sha = []byte(trie.Root.(string))
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case []byte:
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sha = trie.Root.([]byte)
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default:
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panic(fmt.Sprintf("invalid root type %T", trie.Root))
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}
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return sha
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}
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func (self *Block) SetTxHash(receipts Receipts) {
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self.TxSha = CreateTxSha(receipts)
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}
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func (block *Block) Value() *ethutil.Value {
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return ethutil.NewValue([]interface{}{block.header(), block.rlpReceipts(), block.rlpUncles()})
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}
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func (block *Block) RlpEncode() []byte {
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// Encode a slice interface which contains the header and the list of
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// transactions.
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return block.Value().Encode()
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}
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func (block *Block) RlpDecode(data []byte) {
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rlpValue := ethutil.NewValueFromBytes(data)
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block.RlpValueDecode(rlpValue)
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}
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func (block *Block) RlpValueDecode(decoder *ethutil.Value) {
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header := decoder.Get(0)
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block.PrevHash = header.Get(0).Bytes()
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block.UncleSha = header.Get(1).Bytes()
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block.Coinbase = header.Get(2).Bytes()
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block.state = ethstate.New(ethtrie.New(ethutil.Config.Db, header.Get(3).Val))
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block.TxSha = header.Get(4).Bytes()
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block.Difficulty = header.Get(5).BigInt()
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block.Number = header.Get(6).BigInt()
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//fmt.Printf("#%v : %x\n", block.Number, block.Coinbase)
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block.MinGasPrice = header.Get(7).BigInt()
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block.GasLimit = header.Get(8).BigInt()
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block.GasUsed = header.Get(9).BigInt()
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block.Time = int64(header.Get(10).BigInt().Uint64())
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block.Extra = header.Get(11).Str()
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block.Nonce = header.Get(12).Bytes()
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// Tx list might be empty if this is an uncle. Uncles only have their
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// header set.
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if decoder.Get(1).IsNil() == false { // Yes explicitness
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receipts := decoder.Get(1)
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block.transactions = make([]*Transaction, receipts.Len())
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block.receipts = make([]*Receipt, receipts.Len())
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for i := 0; i < receipts.Len(); i++ {
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receipt := NewRecieptFromValue(receipts.Get(i))
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block.transactions[i] = receipt.Tx
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block.receipts[i] = receipt
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}
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}
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if decoder.Get(2).IsNil() == false { // Yes explicitness
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uncles := decoder.Get(2)
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block.Uncles = make([]*Block, uncles.Len())
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for i := 0; i < uncles.Len(); i++ {
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block.Uncles[i] = NewUncleBlockFromValue(uncles.Get(i))
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}
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}
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}
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func NewUncleBlockFromValue(header *ethutil.Value) *Block {
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block := &Block{}
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block.PrevHash = header.Get(0).Bytes()
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block.UncleSha = header.Get(1).Bytes()
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block.Coinbase = header.Get(2).Bytes()
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block.state = ethstate.New(ethtrie.New(ethutil.Config.Db, header.Get(3).Val))
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block.TxSha = header.Get(4).Bytes()
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block.Difficulty = header.Get(5).BigInt()
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block.Number = header.Get(6).BigInt()
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block.MinGasPrice = header.Get(7).BigInt()
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block.GasLimit = header.Get(8).BigInt()
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block.GasUsed = header.Get(9).BigInt()
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block.Time = int64(header.Get(10).BigInt().Uint64())
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block.Extra = header.Get(11).Str()
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block.Nonce = header.Get(12).Bytes()
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return block
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}
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func (block *Block) GetRoot() interface{} {
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return block.state.Trie.Root
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}
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func (self *Block) Receipts() []*Receipt {
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return self.receipts
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}
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func (block *Block) header() []interface{} {
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return []interface{}{
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// Sha of the previous block
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block.PrevHash,
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// Sha of uncles
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block.UncleSha,
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// Coinbase address
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block.Coinbase,
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// root state
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block.state.Trie.Root,
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// Sha of tx
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block.TxSha,
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// Current block Difficulty
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block.Difficulty,
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// The block number
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block.Number,
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// Block minimum gas price
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block.MinGasPrice,
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// Block upper gas bound
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block.GasLimit,
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// Block gas used
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block.GasUsed,
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// Time the block was found?
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block.Time,
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// Extra data
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block.Extra,
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// Block's Nonce for validation
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block.Nonce,
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}
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}
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func (block *Block) String() string {
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return fmt.Sprintf(`
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BLOCK(%x):
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PrevHash: %x
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UncleSha: %x
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Coinbase: %x
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Root: %x
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TxSha: %x
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Difficulty: %v
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Number: %v
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MinGas: %v
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MaxLimit: %v
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GasUsed: %v
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Time: %v
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Extra: %v
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Nonce: %x
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NumTx: %v
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`,
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block.Hash(),
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block.PrevHash,
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block.UncleSha,
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block.Coinbase,
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block.state.Trie.Root,
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block.TxSha,
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block.Difficulty,
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block.Number,
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block.MinGasPrice,
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block.GasLimit,
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block.GasUsed,
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block.Time,
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block.Extra,
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block.Nonce,
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len(block.transactions),
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)
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}
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