0280fa0264
This commit converts all block height references to int32 instead of int64. The current target block production rate is 10 mins per block which means it will take roughly 40,800 years to reach the maximum height an int32 affords. Even if the target rate were lowered to one block per minute, it would still take roughly another 4,080 years to reach the maximum. In the mean time, there is no reason to use a larger type which results in higher memory and disk space usage. However, for now, in order to avoid having to reserialize a bunch of database information, the heights are still serialized to the database as 8-byte uint64s. This is being mainly being done in preparation for further upcoming infrastructure changes which will use the smaller and more efficient 4-byte serialization in the database as well.
82 lines
2.6 KiB
Go
82 lines
2.6 KiB
Go
// Copyright (c) 2013-2015 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package blockchain
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import "github.com/btcsuite/btcutil"
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// maybeAcceptBlock potentially accepts a block into the memory block chain.
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// It performs several validation checks which depend on its position within
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// the block chain before adding it. The block is expected to have already gone
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// through ProcessBlock before calling this function with it.
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//
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// The flags modify the behavior of this function as follows:
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// - BFDryRun: The memory chain index will not be pruned and no accept
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// notification will be sent since the block is not being accepted.
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//
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// The flags are also passed to checkBlockContext and connectBestChain. See
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// their documentation for how the flags modify their behavior.
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func (b *BlockChain) maybeAcceptBlock(block *btcutil.Block, flags BehaviorFlags) error {
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dryRun := flags&BFDryRun == BFDryRun
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// Get a block node for the block previous to this one. Will be nil
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// if this is the genesis block.
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prevNode, err := b.getPrevNodeFromBlock(block)
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if err != nil {
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log.Errorf("getPrevNodeFromBlock: %v", err)
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return err
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}
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// The height of this block is one more than the referenced previous
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// block.
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blockHeight := int32(0)
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if prevNode != nil {
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blockHeight = prevNode.height + 1
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}
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block.SetHeight(blockHeight)
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// The block must pass all of the validation rules which depend on the
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// position of the block within the block chain.
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err = b.checkBlockContext(block, prevNode, flags)
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if err != nil {
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return err
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}
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// Prune block nodes which are no longer needed before creating
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// a new node.
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if !dryRun {
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err = b.pruneBlockNodes()
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if err != nil {
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return err
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}
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}
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// Create a new block node for the block and add it to the in-memory
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// block chain (could be either a side chain or the main chain).
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blockHeader := &block.MsgBlock().Header
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newNode := newBlockNode(blockHeader, block.Sha(), blockHeight)
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if prevNode != nil {
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newNode.parent = prevNode
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newNode.height = blockHeight
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newNode.workSum.Add(prevNode.workSum, newNode.workSum)
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}
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// Connect the passed block to the chain while respecting proper chain
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// selection according to the chain with the most proof of work. This
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// also handles validation of the transaction scripts.
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err = b.connectBestChain(newNode, block, flags)
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if err != nil {
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return err
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}
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// Notify the caller that the new block was accepted into the block
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// chain. The caller would typically want to react by relaying the
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// inventory to other peers.
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if !dryRun {
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b.sendNotification(NTBlockAccepted, block)
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}
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return nil
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}
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