blockchain: Remove unused block node removal func.

This removes the removeBlockNode function since it is no longer used
after the addition of CLTV removed block node pruning.
This commit is contained in:
Dave Collins 2017-02-01 11:14:30 -06:00
parent 0d0f50c464
commit d552176e1d
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@ -615,44 +615,6 @@ func (b *BlockChain) ancestorNode(node *blockNode, height int32) (*blockNode, er
return iterNode, nil
}
// removeBlockNode removes the passed block node from the memory chain by
// unlinking all of its children and removing it from the the node and
// dependency indices.
//
// This function MUST be called with the chain state lock held (for writes).
func (b *BlockChain) removeBlockNode(node *blockNode) error {
if node.parent != nil {
return AssertError(fmt.Sprintf("removeBlockNode must be "+
"called with a node at the front of the chain - node %v",
node.hash))
}
// Remove the node from the node index.
delete(b.index, *node.hash)
// Unlink all of the node's children.
for _, child := range node.children {
child.parent = nil
}
node.children = nil
// Remove the reference from the dependency index.
prevHash := node.parentHash
if children, ok := b.depNodes[*prevHash]; ok {
// Find the node amongst the children of the
// dependencies for the parent hash and remove it.
b.depNodes[*prevHash] = removeChildNode(children, node)
// Remove the map entry altogether if there are no
// longer any nodes which depend on the parent hash.
if len(b.depNodes[*prevHash]) == 0 {
delete(b.depNodes, *prevHash)
}
}
return nil
}
// calcPastMedianTime calculates the median time of the previous few blocks
// prior to, and including, the passed block node. It is primarily used to
// validate new blocks have sane timestamps.