Golang Block.Uncles方法代码示例

// 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 := common.NewList(ptxs)

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

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

func (self *ChainManager) GetUnclesInChain(block *types.Block, length int) (uncles []*types.Header) {
	for i := 0; block != nil && i < length; i++ {
		uncles = append(uncles, block.Uncles()...)
		block = self.GetBlock(block.ParentHash())
	}

	return
}

func NewBlockRes(block *types.Block, fullTx bool) *BlockRes {
	if block == nil {
		return nil
	}

	res := new(BlockRes)
	res.fullTx = fullTx
	res.BlockNumber = newHexNum(block.Number())
	res.BlockHash = newHexData(block.Hash())
	res.ParentHash = newHexData(block.ParentHash())
	res.Nonce = newHexData(block.Nonce())
	res.Sha3Uncles = newHexData(block.UncleHash())
	res.LogsBloom = newHexData(block.Bloom())
	res.TransactionRoot = newHexData(block.TxHash())
	res.StateRoot = newHexData(block.Root())
	res.Miner = newHexData(block.Coinbase())
	res.Difficulty = newHexNum(block.Difficulty())
	res.TotalDifficulty = newHexNum(block.Td)
	res.Size = newHexNum(block.Size().Int64())
	res.ExtraData = newHexData(block.Extra())
	res.GasLimit = newHexNum(block.GasLimit())
	res.GasUsed = newHexNum(block.GasUsed())
	res.UnixTimestamp = newHexNum(block.Time())

	txs := block.Transactions()
	res.Transactions = make([]*TransactionRes, len(txs))
	for i, tx := range txs {
		res.Transactions[i] = NewTransactionRes(tx)
		res.Transactions[i].BlockHash = res.BlockHash
		res.Transactions[i].BlockNumber = res.BlockNumber
		res.Transactions[i].TxIndex = newHexNum(i)
	}

	uncles := block.Uncles()
	res.Uncles = make([]*UncleRes, len(uncles))
	for i, uncle := range uncles {
		res.Uncles[i] = NewUncleRes(uncle)
	}

	return res
}

func (sm *BlockProcessor) VerifyUncles(statedb *state.StateDB, block, parent *types.Block) error {
	uncles := set.New()
	ancestors := make(map[common.Hash]*types.Block)
	for _, ancestor := range sm.bc.GetBlocksFromHash(block.ParentHash(), 7) {
		ancestors[ancestor.Hash()] = ancestor
		// Include ancestors uncles in the uncle set. Uncles must be unique.
		for _, uncle := range ancestor.Uncles() {
			uncles.Add(uncle.Hash())
		}
	}
	ancestors[block.Hash()] = block
	uncles.Add(block.Hash())

	for i, uncle := range block.Uncles() {
		hash := uncle.Hash()
		if uncles.Has(hash) {
			// Error not unique
			return UncleError("uncle[%d](%x) not unique", i, hash[:4])
		}
		uncles.Add(hash)

		if ancestors[hash] != nil {
			branch := fmt.Sprintf("  O - %x\n  |\n", block.Hash())
			for h := range ancestors {
				branch += fmt.Sprintf("  O - %x\n  |\n", h)
			}
			glog.Infoln(branch)
			return UncleError("uncle[%d](%x) is ancestor", i, hash[:4])
		}

		if ancestors[uncle.ParentHash] == nil || uncle.ParentHash == parent.Hash() {
			return UncleError("uncle[%d](%x)'s parent is not ancestor (%x)", i, hash[:4], uncle.ParentHash[0:4])
		}

		if err := ValidateHeader(sm.Pow, uncle, ancestors[uncle.ParentHash], true, true); err != nil {
			return ValidationError(fmt.Sprintf("uncle[%d](%x) header invalid: %v", i, hash[:4], err))
		}
	}

	return nil
}

func (sm *BlockProcessor) processWithParent(block, parent *types.Block) (logs state.Logs, receipts types.Receipts, err error) {
	// Create a new state based on the parent's root (e.g., create copy)
	state := state.New(parent.Root(), sm.chainDb)
	header := block.Header()
	uncles := block.Uncles()
	txs := block.Transactions()

	// Block validation
	if err = ValidateHeader(sm.Pow, header, parent, false, false); err != nil {
		return
	}

	// There can be at most two uncles
	if len(uncles) > 2 {
		return nil, nil, ValidationError("Block can only contain maximum 2 uncles (contained %v)", len(uncles))
	}

	receipts, err = sm.TransitionState(state, parent, block, false)
	if err != nil {
		return
	}

	// Validate the received block's bloom with the one derived from the generated receipts.
	// For valid blocks this should always validate to true.
	rbloom := types.CreateBloom(receipts)
	if rbloom != header.Bloom {
		err = fmt.Errorf("unable to replicate block's bloom=%x", rbloom)
		return
	}

	// The transactions Trie's root (R = (Tr [[i, RLP(T1)], [i, RLP(T2)], ... [n, RLP(Tn)]]))
	// can be used by light clients to make sure they've received the correct Txs
	txSha := types.DeriveSha(txs)
	if txSha != header.TxHash {
		err = fmt.Errorf("invalid transaction root hash. received=%x calculated=%x", header.TxHash, txSha)
		return
	}

	// Tre receipt Trie's root (R = (Tr [[H1, R1], ... [Hn, R1]]))
	receiptSha := types.DeriveSha(receipts)
	if receiptSha != header.ReceiptHash {
		err = fmt.Errorf("invalid receipt root hash. received=%x calculated=%x", header.ReceiptHash, receiptSha)
		return
	}

	// Verify UncleHash before running other uncle validations
	unclesSha := types.CalcUncleHash(uncles)
	if unclesSha != header.UncleHash {
		err = fmt.Errorf("invalid uncles root hash. received=%x calculated=%x", header.UncleHash, unclesSha)
		return
	}

	// Verify uncles
	if err = sm.VerifyUncles(state, block, parent); err != nil {
		return
	}
	// Accumulate static rewards; block reward, uncle's and uncle inclusion.
	AccumulateRewards(state, header, uncles)

	// Commit state objects/accounts to a temporary trie (does not save)
	// used to calculate the state root.
	state.SyncObjects()
	if header.Root != state.Root() {
		err = fmt.Errorf("invalid merkle root. received=%x got=%x", header.Root, state.Root())
		return
	}

	// Sync the current block's state to the database
	state.Sync()

	return state.Logs(), receipts, nil
}