335 lines
10 KiB
Go
335 lines
10 KiB
Go
package stmgr
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
|
|
"github.com/ipfs/go-cid"
|
|
"golang.org/x/xerrors"
|
|
|
|
"github.com/filecoin-project/go-state-types/abi"
|
|
|
|
"github.com/filecoin-project/lotus/chain/index"
|
|
"github.com/filecoin-project/lotus/chain/store"
|
|
"github.com/filecoin-project/lotus/chain/types"
|
|
)
|
|
|
|
// WaitForMessage blocks until a message appears on chain. It looks backwards in the chain to see if this has already
|
|
// happened, with an optional limit to how many epochs it will search. It guarantees that the message has been on
|
|
// chain for at least confidence epochs without being reverted before returning.
|
|
func (sm *StateManager) WaitForMessage(ctx context.Context, mcid cid.Cid, confidence uint64, lookbackLimit abi.ChainEpoch, allowReplaced bool) (*types.TipSet, *types.MessageReceipt, cid.Cid, error) {
|
|
ctx, cancel := context.WithCancel(ctx)
|
|
defer cancel()
|
|
|
|
msg, err := sm.cs.GetCMessage(ctx, mcid)
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, fmt.Errorf("failed to load message: %w", err)
|
|
}
|
|
|
|
tsub := sm.cs.SubHeadChanges(ctx)
|
|
|
|
head, ok := <-tsub
|
|
if !ok {
|
|
return nil, nil, cid.Undef, fmt.Errorf("SubHeadChanges stream was invalid")
|
|
}
|
|
|
|
if len(head) != 1 {
|
|
return nil, nil, cid.Undef, fmt.Errorf("SubHeadChanges first entry should have been one item")
|
|
}
|
|
|
|
if head[0].Type != store.HCCurrent {
|
|
return nil, nil, cid.Undef, fmt.Errorf("expected current head on SHC stream (got %s)", head[0].Type)
|
|
}
|
|
|
|
r, foundMsg, err := sm.tipsetExecutedMessage(ctx, head[0].Val, mcid, msg.VMMessage(), allowReplaced)
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, err
|
|
}
|
|
|
|
if r != nil {
|
|
return head[0].Val, r, foundMsg, nil
|
|
}
|
|
|
|
var backTs *types.TipSet
|
|
var backRcp *types.MessageReceipt
|
|
var backFm cid.Cid
|
|
backSearchWait := make(chan struct{})
|
|
go func() {
|
|
fts, r, foundMsg, err := sm.searchBackForMsg(ctx, head[0].Val, msg, lookbackLimit, allowReplaced)
|
|
if err != nil {
|
|
log.Warnf("failed to look back through chain for message: %v", err)
|
|
return
|
|
}
|
|
|
|
backTs = fts
|
|
backRcp = r
|
|
backFm = foundMsg
|
|
close(backSearchWait)
|
|
}()
|
|
|
|
var candidateTs *types.TipSet
|
|
var candidateRcp *types.MessageReceipt
|
|
var candidateFm cid.Cid
|
|
heightOfHead := head[0].Val.Height()
|
|
reverts := map[types.TipSetKey]bool{}
|
|
|
|
for {
|
|
select {
|
|
case notif, ok := <-tsub:
|
|
if !ok {
|
|
return nil, nil, cid.Undef, ctx.Err()
|
|
}
|
|
for _, val := range notif {
|
|
switch val.Type {
|
|
case store.HCRevert:
|
|
if val.Val.Equals(candidateTs) {
|
|
candidateTs = nil
|
|
candidateRcp = nil
|
|
candidateFm = cid.Undef
|
|
}
|
|
if backSearchWait != nil {
|
|
reverts[val.Val.Key()] = true
|
|
}
|
|
case store.HCApply:
|
|
if candidateTs != nil && val.Val.Height() >= candidateTs.Height()+abi.ChainEpoch(confidence) {
|
|
return candidateTs, candidateRcp, candidateFm, nil
|
|
}
|
|
r, foundMsg, err := sm.tipsetExecutedMessage(ctx, val.Val, mcid, msg.VMMessage(), allowReplaced)
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, err
|
|
}
|
|
if r != nil {
|
|
if confidence == 0 {
|
|
return val.Val, r, foundMsg, err
|
|
}
|
|
candidateTs = val.Val
|
|
candidateRcp = r
|
|
candidateFm = foundMsg
|
|
}
|
|
heightOfHead = val.Val.Height()
|
|
}
|
|
}
|
|
case <-backSearchWait:
|
|
// check if we found the message in the chain and that is hasn't been reverted since we started searching
|
|
if backTs != nil && !reverts[backTs.Key()] {
|
|
// if head is at or past confidence interval, return immediately
|
|
if heightOfHead >= backTs.Height()+abi.ChainEpoch(confidence) {
|
|
return backTs, backRcp, backFm, nil
|
|
}
|
|
|
|
// wait for confidence interval
|
|
candidateTs = backTs
|
|
candidateRcp = backRcp
|
|
candidateFm = backFm
|
|
}
|
|
reverts = nil
|
|
backSearchWait = nil
|
|
case <-ctx.Done():
|
|
return nil, nil, cid.Undef, ctx.Err()
|
|
}
|
|
}
|
|
}
|
|
|
|
func (sm *StateManager) SearchForMessage(ctx context.Context, head *types.TipSet, mcid cid.Cid, lookbackLimit abi.ChainEpoch, allowReplaced bool) (*types.TipSet, *types.MessageReceipt, cid.Cid, error) {
|
|
msg, err := sm.cs.GetCMessage(ctx, mcid)
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, fmt.Errorf("failed to load message: %w", err)
|
|
}
|
|
|
|
r, foundMsg, err := sm.tipsetExecutedMessage(ctx, head, mcid, msg.VMMessage(), allowReplaced)
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, err
|
|
}
|
|
|
|
if r != nil {
|
|
return head, r, foundMsg, nil
|
|
}
|
|
|
|
fts, r, foundMsg, err := sm.searchForIndexedMsg(ctx, mcid, msg)
|
|
|
|
switch {
|
|
case err == nil:
|
|
return fts, r, foundMsg, nil
|
|
|
|
case errors.Is(err, index.ErrNotFound):
|
|
// ok for the index to have incomplete data
|
|
|
|
default:
|
|
log.Warnf("error searching message index: %s", err)
|
|
}
|
|
|
|
fts, r, foundMsg, err = sm.searchBackForMsg(ctx, head, msg, lookbackLimit, allowReplaced)
|
|
|
|
if err != nil {
|
|
log.Warnf("failed to look back through chain for message %s", mcid)
|
|
return nil, nil, cid.Undef, err
|
|
}
|
|
|
|
if fts == nil {
|
|
return nil, nil, cid.Undef, nil
|
|
}
|
|
|
|
return fts, r, foundMsg, nil
|
|
}
|
|
|
|
func (sm *StateManager) searchForIndexedMsg(ctx context.Context, mcid cid.Cid, m types.ChainMsg) (*types.TipSet, *types.MessageReceipt, cid.Cid, error) {
|
|
minfo, err := sm.msgIndex.GetMsgInfo(ctx, mcid)
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, err
|
|
}
|
|
|
|
// check the height against the current tipset; minimum execution confidence requires that the
|
|
// inclusion tipset height is lower than the current head + 1
|
|
curTs := sm.cs.GetHeaviestTipSet()
|
|
if curTs.Height() <= minfo.Epoch+1 {
|
|
return nil, nil, cid.Undef, xerrors.Errorf("indexed message does not appear before the current tipset; index epoch: %d, current epoch: %d", minfo.Epoch, curTs.Height())
|
|
}
|
|
|
|
// now get the execution tipset
|
|
// TODO optimization: the index should have it implicitly so we can return it in the msginfo.
|
|
xts, err := sm.cs.GetTipsetByHeight(ctx, minfo.Epoch+1, curTs, false)
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, err
|
|
}
|
|
|
|
// check that it is indeed the parent of the inclusion tipset
|
|
parent := xts.Parents()
|
|
parentCid, err := parent.Cid()
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, xerrors.Errorf("error computing tipset cid: %w", err)
|
|
}
|
|
|
|
if !parentCid.Equals(minfo.TipSet) {
|
|
return nil, nil, cid.Undef, xerrors.Errorf("inclusion tipset mismatch: have %s, expected %s", parentCid, minfo.TipSet)
|
|
}
|
|
|
|
r, foundMsg, err := sm.tipsetExecutedMessage(ctx, xts, mcid, m.VMMessage(), false)
|
|
return xts, r, foundMsg, err
|
|
}
|
|
|
|
// searchBackForMsg searches up to limit tipsets backwards from the given
|
|
// tipset for a message receipt.
|
|
// If limit is
|
|
// - 0 then no tipsets are searched
|
|
// - 5 then five tipset are searched
|
|
// - LookbackNoLimit then there is no limit
|
|
func (sm *StateManager) searchBackForMsg(ctx context.Context, from *types.TipSet, m types.ChainMsg, limit abi.ChainEpoch, allowReplaced bool) (*types.TipSet, *types.MessageReceipt, cid.Cid, error) {
|
|
limitHeight := from.Height() - limit
|
|
noLimit := limit == LookbackNoLimit
|
|
|
|
cur := from
|
|
curActor, err := sm.LoadActor(ctx, m.VMMessage().From, cur)
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, xerrors.Errorf("failed to load initital tipset")
|
|
}
|
|
|
|
mFromId, err := sm.LookupID(ctx, m.VMMessage().From, from)
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, xerrors.Errorf("looking up From id address: %w", err)
|
|
}
|
|
|
|
mNonce := m.VMMessage().Nonce
|
|
|
|
for {
|
|
// If we've reached the genesis block, or we've reached the limit of
|
|
// how far back to look
|
|
if cur.Height() == 0 || !noLimit && cur.Height() <= limitHeight {
|
|
// it ain't here!
|
|
return nil, nil, cid.Undef, nil
|
|
}
|
|
|
|
select {
|
|
case <-ctx.Done():
|
|
return nil, nil, cid.Undef, nil
|
|
default:
|
|
}
|
|
|
|
// we either have no messages from the sender, or the latest message we found has a lower nonce than the one being searched for,
|
|
// either way, no reason to lookback, it ain't there
|
|
if curActor == nil || curActor.Nonce == 0 || curActor.Nonce < mNonce {
|
|
return nil, nil, cid.Undef, nil
|
|
}
|
|
|
|
pts, err := sm.cs.LoadTipSet(ctx, cur.Parents())
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, xerrors.Errorf("failed to load tipset during msg wait searchback: %w", err)
|
|
}
|
|
|
|
act, err := sm.LoadActor(ctx, mFromId, pts)
|
|
actorNoExist := errors.Is(err, types.ErrActorNotFound)
|
|
if err != nil && !actorNoExist {
|
|
return nil, nil, cid.Cid{}, xerrors.Errorf("failed to load the actor: %w", err)
|
|
}
|
|
|
|
// check that between cur and parent tipset the nonce fell into range of our message
|
|
if actorNoExist || (curActor.Nonce > mNonce && act.Nonce <= mNonce) {
|
|
r, foundMsg, err := sm.tipsetExecutedMessage(ctx, cur, m.Cid(), m.VMMessage(), allowReplaced)
|
|
if err != nil {
|
|
return nil, nil, cid.Undef, xerrors.Errorf("checking for message execution during lookback: %w", err)
|
|
}
|
|
|
|
if r != nil {
|
|
return cur, r, foundMsg, nil
|
|
}
|
|
}
|
|
|
|
cur = pts
|
|
curActor = act
|
|
}
|
|
}
|
|
|
|
func (sm *StateManager) tipsetExecutedMessage(ctx context.Context, ts *types.TipSet, msg cid.Cid, vmm *types.Message, allowReplaced bool) (*types.MessageReceipt, cid.Cid, error) {
|
|
// The genesis block did not execute any messages
|
|
if ts.Height() == 0 {
|
|
return nil, cid.Undef, nil
|
|
}
|
|
|
|
pts, err := sm.cs.LoadTipSet(ctx, ts.Parents())
|
|
if err != nil {
|
|
return nil, cid.Undef, err
|
|
}
|
|
|
|
cm, err := sm.cs.MessagesForTipset(ctx, pts)
|
|
if err != nil {
|
|
return nil, cid.Undef, err
|
|
}
|
|
|
|
for ii := range cm {
|
|
// iterate in reverse because we going backwards through the chain
|
|
i := len(cm) - ii - 1
|
|
m := cm[i]
|
|
|
|
if m.VMMessage().From == vmm.From { // cheaper to just check origin first
|
|
if m.VMMessage().Nonce == vmm.Nonce {
|
|
if !m.VMMessage().EqualCall(vmm) {
|
|
// this is an entirely different message, fail
|
|
return nil, cid.Undef, xerrors.Errorf("found message with equal nonce as the one we are looking for that is NOT a valid replacement message (F:%s n %d, TS: %s n%d)",
|
|
msg, vmm.Nonce, m.Cid(), m.VMMessage().Nonce)
|
|
}
|
|
|
|
if m.Cid() != msg {
|
|
if !allowReplaced {
|
|
log.Warnw("found message with equal nonce and call params but different CID",
|
|
"wanted", msg, "found", m.Cid(), "nonce", vmm.Nonce, "from", vmm.From)
|
|
return nil, cid.Undef, xerrors.Errorf("found message with equal nonce as the one we are looking for (F:%s n %d, TS: %s n%d)",
|
|
msg, vmm.Nonce, m.Cid(), m.VMMessage().Nonce)
|
|
}
|
|
}
|
|
|
|
pr, err := sm.cs.GetParentReceipt(ctx, ts.Blocks()[0], i)
|
|
if err != nil {
|
|
return nil, cid.Undef, err
|
|
}
|
|
|
|
return pr, m.Cid(), nil
|
|
}
|
|
if m.VMMessage().Nonce < vmm.Nonce {
|
|
return nil, cid.Undef, nil // don't bother looking further
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil, cid.Undef, nil
|
|
}
|