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issuer.go
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issuer.go
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// Copyright (C) 2019-2022, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package snowman
import (
"context"
"github.com/MetalBlockchain/metalgo/ids"
"github.com/MetalBlockchain/metalgo/snow/consensus/snowman"
"github.com/MetalBlockchain/metalgo/utils/set"
)
// issuer issues [blk] into to consensus after its dependencies are met.
type issuer struct {
t *Transitive
blk snowman.Block
abandoned bool
deps set.Set[ids.ID]
}
func (i *issuer) Dependencies() set.Set[ids.ID] {
return i.deps
}
// Mark that a dependency has been met
func (i *issuer) Fulfill(ctx context.Context, id ids.ID) {
i.deps.Remove(id)
i.Update(ctx)
}
// Abandon the attempt to issue [i.block]
func (i *issuer) Abandon(ctx context.Context, _ ids.ID) {
if !i.abandoned {
blkID := i.blk.ID()
i.t.removeFromPending(i.blk)
i.t.addToNonVerifieds(i.blk)
i.t.blocked.Abandon(ctx, blkID)
// Tracks performance statistics
i.t.metrics.numRequests.Set(float64(i.t.blkReqs.Len()))
i.t.metrics.numBlocked.Set(float64(len(i.t.pending)))
i.t.metrics.numBlockers.Set(float64(i.t.blocked.Len()))
}
i.abandoned = true
}
func (i *issuer) Update(ctx context.Context) {
if i.abandoned || i.deps.Len() != 0 || i.t.errs.Errored() {
return
}
// Issue the block into consensus
i.t.errs.Add(i.t.deliver(ctx, i.blk))
}