lotus/chain/messagepool/repub.go

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package messagepool
import (
"context"
"sort"
"golang.org/x/xerrors"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/lotus/build"
"github.com/filecoin-project/lotus/chain/messagepool/gasguess"
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"github.com/filecoin-project/lotus/chain/types"
"github.com/ipfs/go-cid"
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)
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const repubMsgLimit = 30
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func (mp *MessagePool) republishPendingMessages() error {
mp.curTsLk.Lock()
ts := mp.curTs
baseFee, err := mp.api.ChainComputeBaseFee(context.TODO(), ts)
if err != nil {
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mp.curTsLk.Unlock()
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return xerrors.Errorf("computing basefee: %w", err)
}
pending := make(map[address.Address]map[uint64]*types.SignedMessage)
mp.lk.Lock()
mp.republished = nil // clear this to avoid races triggering an early republish
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for actor := range mp.localAddrs {
mset, ok := mp.pending[actor]
if !ok {
continue
}
if len(mset.msgs) == 0 {
continue
}
// we need to copy this while holding the lock to avoid races with concurrent modification
pend := make(map[uint64]*types.SignedMessage, len(mset.msgs))
for nonce, m := range mset.msgs {
pend[nonce] = m
}
pending[actor] = pend
}
mp.lk.Unlock()
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mp.curTsLk.Unlock()
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if len(pending) == 0 {
return nil
}
var chains []*msgChain
for actor, mset := range pending {
next := mp.createMessageChains(actor, mset, baseFee, ts)
chains = append(chains, next...)
}
if len(chains) == 0 {
return nil
}
sort.Slice(chains, func(i, j int) bool {
return chains[i].Before(chains[j])
})
// we don't republish negative performing chains; this is an error that will be screamed
// at the user
if chains[0].gasPerf < 0 {
return xerrors.Errorf("skipping republish: all message chains have negative gas performance; best gas performance: %f", chains[0].gasPerf)
}
gasLimit := int64(build.BlockGasLimit)
minGas := int64(gasguess.MinGas)
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var msgs []*types.SignedMessage
for i := 0; i < len(chains); {
chain := chains[i]
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// we can exceed this if we have picked (some) longer chain already
if len(msgs) > repubMsgLimit {
break
}
// there is not enough gas for any message
if gasLimit <= minGas {
break
}
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// we don't republish negative performing chains, as they won't be included in
// a block anyway
if chain.gasPerf < 0 {
break
}
// has the chain been invalidated?
if !chain.valid {
i++
continue
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}
// does it fit in a block?
if chain.gasLimit <= gasLimit {
gasLimit -= chain.gasLimit
msgs = append(msgs, chain.msgs...)
i++
continue
}
// we can't fit the current chain but there is gas to spare
// trim it and push it down
chain.Trim(gasLimit, mp, baseFee, ts, false)
for j := i; j < len(chains)-1; j++ {
if chains[j].Before(chains[j+1]) {
break
}
chains[j], chains[j+1] = chains[j+1], chains[j]
}
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}
count := 0
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log.Infof("republishing %d messages", len(msgs))
for _, m := range msgs {
mb, err := m.Serialize()
if err != nil {
return xerrors.Errorf("cannot serialize message: %w", err)
}
err = mp.api.PubSubPublish(build.MessagesTopic(mp.netName), mb)
if err != nil {
return xerrors.Errorf("cannot publish: %w", err)
}
count++
}
// track most recently republished messages
republished := make(map[cid.Cid]struct{})
for _, m := range msgs[:count] {
republished[m.Cid()] = struct{}{}
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}
mp.lk.Lock()
// update the republished set so that we can trigger early republish from head changes
mp.republished = republished
mp.lk.Unlock()
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return nil
}