add MpoolClear api

api/api_full.go

@@ -184,6 +184,9 @@ type FullNode interface {
 	MpoolGetNonce(context.Context, address.Address) (uint64, error)
 	MpoolSub(context.Context) (<-chan MpoolUpdate, error)
 
+	// MpoolClear clears all pending messages from the mpool
+	MpoolClear(context.Context) error
+
 	// MpoolGetConfig returns (a copy of) the current mpool config
 	MpoolGetConfig(context.Context) (*types.MpoolConfig, error)
 	// MpoolSetConfig sets the mpool config to (a copy of) the supplied config

api/apistruct/struct.go

@@ -107,6 +107,8 @@ type FullNodeStruct struct {
 		MpoolSelect func(context.Context, types.TipSetKey, float64) ([]*types.SignedMessage, error) `perm:"read"`
 
 		MpoolPending func(context.Context, types.TipSetKey) ([]*types.SignedMessage, error) `perm:"read"`
+		MpoolClear   func(context.Context) error                                            `perm:"write"`
+
 		MpoolPush        func(context.Context, *types.SignedMessage) (cid.Cid, error)                              `perm:"write"`
 		MpoolPushMessage func(context.Context, *types.Message, *api.MessageSendSpec) (*types.SignedMessage, error) `perm:"sign"`
 		MpoolGetNonce    func(context.Context, address.Address) (uint64, error)                                    `perm:"read"`
@@ -494,6 +496,10 @@ func (c *FullNodeStruct) MpoolPending(ctx context.Context, tsk types.TipSetKey)
 	return c.Internal.MpoolPending(ctx, tsk)
 }
 
+func (c *FullNodeStruct) MpoolClear(ctx context.Context) error {
+	return c.Internal.MpoolClear(ctx)
+}
+
 func (c *FullNodeStruct) MpoolPush(ctx context.Context, smsg *types.SignedMessage) (cid.Cid, error) {
 	return c.Internal.MpoolPush(ctx, smsg)
 }

chain/messagepool/messagepool.go

@@ -973,3 +973,11 @@ func (mp *MessagePool) loadLocal() error {
 
 	return nil
 }
+
+func (mp *MessagePool) Clear() {
+	mp.lk.Lock()
+	defer mp.lk.Unlock()
+
+	mp.pending = make(map[address.Address]*msgSet)
+	mp.republished = nil
+}

node/impl/full/mpool.go

@@ -105,6 +105,11 @@ func (a *MpoolAPI) MpoolPending(ctx context.Context, tsk types.TipSetKey) ([]*ty
 	}
 }
 
+func (a *MpoolAPI) MpoolClear(ctx context.Context) error {
+	a.Mpool.Clear()
+	return nil
+}
+
 func (a *MpoolAPI) MpoolPush(ctx context.Context, smsg *types.SignedMessage) (cid.Cid, error) {
 	return a.Mpool.Push(smsg)
 }