mirror of https://github.com/poanetwork/gecko.git
62 lines
1.6 KiB
Go
62 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 platformvm
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import (
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"github.com/ava-labs/gecko/ids"
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"github.com/ava-labs/gecko/vms/components/core"
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)
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// Abort being accepted results in the proposal of its parent (which must be a proposal block)
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// being rejected.
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type Abort struct {
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DoubleDecisionBlock `serialize:"true"`
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}
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// Verify this block performs a valid state transition.
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//
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// The parent block must be a proposal
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//
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// This function also sets onAcceptDB database if the verification passes.
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func (a *Abort) Verify() error {
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parent, ok := a.parentBlock().(*ProposalBlock)
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// Abort is a decision, so its parent must be a proposal
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if !ok {
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if err := a.Reject(); err == nil {
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if err := a.vm.DB.Commit(); err != nil {
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a.vm.Ctx.Log.Error("error committing Abort block as rejected: %s", err)
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}
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} else {
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a.vm.DB.Abort()
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}
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return errInvalidBlockType
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}
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a.onAcceptDB, a.onAcceptFunc = parent.onAbort()
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a.vm.currentBlocks[a.ID().Key()] = a
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a.parentBlock().addChild(a)
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return nil
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}
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// newAbortBlock returns a new *Abort block where the block's parent, a proposal
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// block, has ID [parentID].
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func (vm *VM) newAbortBlock(parentID ids.ID) *Abort {
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abort := &Abort{DoubleDecisionBlock: DoubleDecisionBlock{CommonDecisionBlock: CommonDecisionBlock{CommonBlock: CommonBlock{
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Block: core.NewBlock(parentID),
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vm: vm,
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}}}}
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// We serialize this block as a Block so that it can be deserialized into a
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// Block
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blk := Block(abort)
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bytes, err := Codec.Marshal(&blk)
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if err != nil {
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return nil
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}
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abort.Block.Initialize(bytes, vm.SnowmanVM)
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return abort
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}
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