Golang Block.BuildTxList方法代码示例

func (ch *Chain) CheckBlock(bl *btc.Block) (er error, dos bool, maybelater bool) {
	// Size limits
	if len(bl.Raw) < 81 || len(bl.Raw) > btc.MAX_BLOCK_SIZE {
		er = errors.New("CheckBlock() : size limits failed")
		dos = true
		return
	}

	if bl.Version() == 0 {
		er = errors.New("CheckBlock() : Block version 0 not allowed")
		dos = true
		return
	}

	// Check timestamp (must not be higher than now +2 hours)
	if int64(bl.BlockTime()) > time.Now().Unix()+2*60*60 {
		er = errors.New("CheckBlock() : block timestamp too far in the future")
		dos = true
		return
	}

	if prv, pres := ch.BlockIndex[bl.Hash.BIdx()]; pres {
		if prv.Parent == nil {
			// This is genesis block
			er = errors.New("Genesis")
			return
		} else {
			er = errors.New("CheckBlock: " + bl.Hash.String() + " already in")
			return
		}
	}

	prevblk, ok := ch.BlockIndex[btc.NewUint256(bl.ParentHash()).BIdx()]
	if !ok {
		er = errors.New("CheckBlock: " + bl.Hash.String() + " parent not found")
		maybelater = true
		return
	}

	height := prevblk.Height + 1

	// Reject the block if it reaches into the chain deeper than our unwind buffer
	if prevblk != ch.BlockTreeEnd && int(ch.BlockTreeEnd.Height)-int(height) >= MovingCheckopintDepth {
		er = errors.New(fmt.Sprint("CheckBlock: btc.Block ", bl.Hash.String(),
			" hooks too deep into the chain: ", height, "/", ch.BlockTreeEnd.Height, " ",
			btc.NewUint256(bl.ParentHash()).String()))
		return
	}

	// Check proof of work
	gnwr := ch.GetNextWorkRequired(prevblk, bl.BlockTime())
	if bl.Bits() != gnwr {
		println("AcceptBlock() : incorrect proof of work ", bl.Bits, " at block", height, " exp:", gnwr)

		// Here is a "solution" for whatever shit there is in testnet3, that nobody can explain me:
		if !ch.testnet() || (height%2016) != 0 {
			er = errors.New("CheckBlock: incorrect proof of work")
			dos = true
			return
		}
	}

	// Count block versions within the Majority Window
	var majority_v2, majority_v3 uint
	n := prevblk
	for cnt := uint(0); cnt < ch.Consensus.Window && n != nil; cnt++ {
		ver := binary.LittleEndian.Uint32(n.BlockHeader[0:4])
		if ver >= 2 {
			majority_v2++
			if ver >= 3 {
				majority_v3++
			}
		}
		n = n.Parent
	}

	if bl.Version() < 2 && majority_v2 >= ch.Consensus.RejectBlock {
		er = errors.New("CheckBlock() : Rejected nVersion=1 block")
		dos = true
		return
	}

	if bl.Version() < 3 && majority_v3 >= ch.Consensus.RejectBlock {
		er = errors.New("CheckBlock() : Rejected nVersion=2 block")
		dos = true
		return
	}

	if bl.Txs == nil {
		er = bl.BuildTxList()
		if er != nil {
			dos = true
			return
		}
	}

	if !bl.Trusted {
		if bl.Version() >= 2 && majority_v2 >= ch.Consensus.EnforceUpgrade {
			var exp []byte
			if height >= 0x800000 {
//.........这里部分代码省略.........

func (ch *Chain) CheckBlock(bl *btc.Block) (er error, dos bool, maybelater bool) {
	// Size limits
	if len(bl.Raw) < 81 || len(bl.Raw) > btc.MAX_BLOCK_SIZE {
		er = errors.New("CheckBlock() : size limits failed")
		dos = true
		return
	}

	// Check timestamp (must not be higher than now +2 hours)
	if int64(bl.BlockTime()) > time.Now().Unix()+2*60*60 {
		er = errors.New("CheckBlock() : block timestamp too far in the future")
		dos = true
		return
	}

	if prv, pres := ch.BlockIndex[bl.Hash.BIdx()]; pres {
		if prv.Parent == nil {
			// This is genesis block
			er = errors.New("Genesis")
			return
		} else {
			er = errors.New("CheckBlock: " + bl.Hash.String() + " already in")
			return
		}
	}

	prevblk, ok := ch.BlockIndex[btc.NewUint256(bl.ParentHash()).BIdx()]
	if !ok {
		er = errors.New("CheckBlock: " + bl.Hash.String() + " parent not found")
		maybelater = true
		return
	}

	// Reject the block if it reaches into the chain deeper than our unwind buffer
	if prevblk != ch.BlockTreeEnd && int(ch.BlockTreeEnd.Height)-int(prevblk.Height+1) >= MovingCheckopintDepth {
		er = errors.New(fmt.Sprint("CheckBlock: btc.Block ", bl.Hash.String(),
			" hooks too deep into the chain: ", prevblk.Height+1, "/", ch.BlockTreeEnd.Height, " ",
			btc.NewUint256(bl.ParentHash()).String()))
		return
	}

	// Check proof of work
	gnwr := ch.GetNextWorkRequired(prevblk, bl.BlockTime())
	if bl.Bits() != gnwr {
		println("AcceptBlock() : incorrect proof of work ", bl.Bits, " at block", prevblk.Height+1,
			" exp:", gnwr)

		// Here is a "solution" for whatever shit there is in testnet3, that nobody can explain me:
		if !ch.testnet() || ((prevblk.Height+1)%2016) != 0 {
			er = errors.New("CheckBlock: incorrect proof of work")
			dos = true
			return
		}
	}

	if bl.Txs == nil {
		er = bl.BuildTxList()
		if er != nil {
			dos = true
			return
		}
	}

	if !bl.Trusted {
		// This is a stupid check, but well, we need to be satoshi compatible
		if len(bl.Txs) == 0 || !bl.Txs[0].IsCoinBase() {
			er = errors.New("CheckBlock() : first tx is not coinbase: " + bl.Hash.String())
			dos = true
			return
		}

		// Check Merkle Root - that's importnant
		if !bytes.Equal(btc.GetMerkel(bl.Txs), bl.MerkleRoot()) {
			er = errors.New("CheckBlock() : Merkle Root mismatch")
			dos = true
			return
		}

		// Check transactions - this is the most time consuming task
		for i := 0; i < len(bl.Txs); i++ {
			er = bl.Txs[i].CheckTransaction()
			if er != nil {
				er = errors.New("CheckBlock() : CheckTransaction failed: " + er.Error())
				dos = true
				return
			}
			if !bl.Txs[i].IsFinal(prevblk.Height+1, bl.BlockTime()) {
				er = errors.New("CheckBlock() : Contains transaction that is not final")
				return
			}
		}
	}

	return
}

func (ch *Chain) PostCheckBlock(bl *btc.Block) (er error) {
	// Size limits
	if len(bl.Raw) < 81 {
		er = errors.New("CheckBlock() : size limits failed low - RPC_Result:bad-blk-length")
		return
	}

	if bl.Txs == nil {
		er = bl.BuildTxList()
		if er != nil {
			return
		}
		if len(bl.OldData) > btc.MAX_BLOCK_SIZE {
			er = errors.New("CheckBlock() : size limits failed high - RPC_Result:bad-blk-length")
			return
		}
	}

	if !bl.Trusted {
		// We need to be satoshi compatible
		if len(bl.Txs) == 0 || !bl.Txs[0].IsCoinBase() {
			er = errors.New("CheckBlock() : first tx is not coinbase: " + bl.Hash.String() + " - RPC_Result:bad-cb-missing")
			return
		}

		// Enforce rule that the coinbase starts with serialized block height
		if bl.Height >= ch.Consensus.BIP34Height {
			var exp [6]byte
			var exp_len int
			binary.LittleEndian.PutUint32(exp[1:5], bl.Height)
			for exp_len = 5; exp_len > 1; exp_len-- {
				if exp[exp_len] != 0 || exp[exp_len-1] >= 0x80 {
					break
				}
			}
			exp[0] = byte(exp_len)
			exp_len++

			if !bytes.HasPrefix(bl.Txs[0].TxIn[0].ScriptSig, exp[:exp_len]) {
				er = errors.New("CheckBlock() : Unexpected block number in coinbase: " + bl.Hash.String() + " - RPC_Result:bad-cb-height")
				return
			}
		}

		// And again...
		for i := 1; i < len(bl.Txs); i++ {
			if bl.Txs[i].IsCoinBase() {
				er = errors.New("CheckBlock() : more than one coinbase: " + bl.Hash.String() + " - RPC_Result:bad-cb-multiple")
				return
			}
		}

		// Check Merkle Root - that's importnant
		merkle, mutated := btc.GetMerkle(bl.Txs)
		if mutated {
			er = errors.New("CheckBlock(): duplicate transaction - RPC_Result:bad-txns-duplicate")
			return
		}

		if !bytes.Equal(merkle, bl.MerkleRoot()) {
			er = errors.New("CheckBlock() : Merkle Root mismatch - RPC_Result:bad-txnmrklroot")
			return
		}
	}

	if bl.BlockTime() >= BIP16SwitchTime {
		bl.VerifyFlags = script.VER_P2SH
	} else {
		bl.VerifyFlags = 0
	}

	if bl.Height >= ch.Consensus.BIP66Height {
		bl.VerifyFlags |= script.VER_DERSIG
	}

	if bl.Height >= ch.Consensus.BIP65Height {
		bl.VerifyFlags |= script.VER_CLTV
	}

	if ch.Consensus.Enforce_CSV != 0 && bl.Height >= ch.Consensus.Enforce_CSV {
		bl.VerifyFlags |= script.VER_CSV
	}

	if ch.Consensus.Enforce_SEGWIT != 0 && bl.Height >= ch.Consensus.Enforce_SEGWIT {
		bl.VerifyFlags |= script.VER_WITNESS | script.VER_NULLDUMMY
	}

	if !bl.Trusted {
		var blockTime uint32
		var had_witness bool

		if (bl.VerifyFlags & script.VER_CSV) != 0 {
			blockTime = bl.MedianPastTime
		} else {
			blockTime = bl.BlockTime()
		}

		// Verify merkle root of witness data
		if (bl.VerifyFlags & script.VER_WITNESS) != 0 {
			var i int
//.........这里部分代码省略.........