mirror of https://github.com/poanetwork/gecko.git
59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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package snowman
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import (
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"github.com/ava-labs/gecko/snow/choices"
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"github.com/ava-labs/gecko/snow/consensus/snowball"
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)
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// Tracks the state of a snowman block
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type snowmanBlock struct {
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// pointer to the snowman instance this node is managed by
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sm Consensus
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// block that this node contains. For the genesis, this value will be nil
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blk Block
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// shouldFalter is set to true if this node, and all its descendants received
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// less than Alpha votes
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shouldFalter bool
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// sb is the snowball instance used to decided which child is the canonical
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// child of this block. If this node has not had a child issued under it,
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// this value will be nil
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sb snowball.Consensus
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// children is the set of blocks that have been issued that name this block
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// as their parent. If this node has not had a child issued under it, this value
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// will be nil
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children map[[32]byte]Block
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}
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func (n *snowmanBlock) AddChild(child Block) {
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childID := child.ID()
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childKey := childID.Key()
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// if the snowball instance is nil, this is the first child. So the instance
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// should be initialized.
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if n.sb == nil {
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n.sb = &snowball.Tree{}
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n.sb.Initialize(n.sm.Parameters(), childID)
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n.children = make(map[[32]byte]Block)
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} else {
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n.sb.Add(childID)
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}
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n.children[childKey] = child
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}
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func (n *snowmanBlock) Accepted() bool {
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// if the block is nil, then this is the genesis which is defined as
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// accepted
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if n.blk == nil {
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return true
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}
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return n.blk.Status() == choices.Accepted
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}
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