add priority nodes in farmerbot configs

farmerbot/README.md

@@ -99,6 +99,8 @@ included_nodes: [optional, if no nodes are added then the farmerbot will include
   - "<your node ID to be included, required at least 2>"
 excluded_nodes:
   - "<your node ID to be excluded, optional>"
+priority:
+  - "<your node ID to have a priority in nodes management, optional>"
 never_shutdown_nodes:
   - "<your node ID to be never shutdown, optional>"
 power:

farmerbot/internal/farmerbot.go

@@ -265,6 +265,8 @@ func (f *FarmerBot) iterateOnNodes(ctx context.Context, subConn Substrate) error
 		}
 	}
 
+	farmNodes = addPriorityToNodes(f.state.config.PriorityNodes, farmNodes)
+
 	for _, nodeID := range farmNodes {
 		if slices.Contains(f.state.config.ExcludedNodes, nodeID) {
 			continue
@@ -328,6 +330,31 @@ func (f *FarmerBot) iterateOnNodes(ctx context.Context, subConn Substrate) error
 	return nil
 }
 
+func addPriorityToNodes(priorityNodes, farmNodes []uint32) []uint32 {
+	updatedPriorityNodes := make([]uint32, len(priorityNodes))
+	copy(updatedPriorityNodes, priorityNodes)
+
+	// remove nodes that don't exist in farm from priority nodes
+	for i := 0; i < len(updatedPriorityNodes); i++ {
+		nodeID := updatedPriorityNodes[i]
+		if !slices.Contains(farmNodes, nodeID) {
+			updatedPriorityNodes = slices.Delete(updatedPriorityNodes, i, i+1)
+			i--
+		}
+	}
+
+	// remove priority nodes from farm nodes
+	for i := 0; i < len(farmNodes); i++ {
+		if slices.Contains(updatedPriorityNodes, farmNodes[i]) {
+			farmNodes = slices.Delete(farmNodes, i, i+1)
+			i--
+		}
+	}
+
+	// append priority and the rest of farm nodes
+	return append(updatedPriorityNodes, farmNodes...)
+}
+
 func (f *FarmerBot) addOrUpdateNode(ctx context.Context, subConn Substrate, nodeID uint32) error {
 	neverShutDown := slices.Contains(f.state.config.NeverShutDownNodes, nodeID)
 

farmerbot/internal/farmerbot_test.go

@@ -32,6 +32,7 @@ func TestFarmerbot(t *testing.T) {
 	inputs := Config{
 		FarmID:        1,
 		IncludedNodes: []uint32{1, 2},
+		PriorityNodes: []uint32{2},
 		Power:         power{WakeUpThreshold: 50},
 	}
 
@@ -66,10 +67,10 @@ func TestFarmerbot(t *testing.T) {
 		assert.True(t, errors.Is(err, substrate.ErrNotFound))
 	})
 
-	t.Run("test iterateOnNodes: update nodes and power off extra node (periodic wake up: already on)", func(t *testing.T) {
+	t.Run("test iterateOnNodes: update nodes and power off extra node (respect priority - periodic wake up: already on)", func(t *testing.T) {
 		mockRMBAndSubstrateCalls(ctx, sub, rmb, inputs, true, true, resources, []string{}, false, false)
 
-		sub.EXPECT().SetNodePowerTarget(farmerbot.identity, gomock.Any(), false).Return(types.Hash{}, nil)
+		sub.EXPECT().SetNodePowerTarget(farmerbot.identity, uint32(2), false).Return(types.Hash{}, nil)
 
 		err = farmerbot.iterateOnNodes(ctx, sub)
 		assert.NoError(t, err)

farmerbot/internal/power.go

@@ -180,8 +180,16 @@ func (f *FarmerBot) resourceUsageTooLow(sub Substrate, usedResources, totalResou
 	newTotalResources := totalResources
 	nodesLeftOnline := len(onNodes)
 
+	// use keys to keep nodes order
+	nodesAllowedToShutdownKeys := make([]uint32, 0, len(nodesAllowedToShutdown))
+	for k := range nodesAllowedToShutdown {
+		nodesAllowedToShutdownKeys = append(nodesAllowedToShutdownKeys, k)
+	}
+
 	// shutdown a node if there is more than an unused node (aka keep at least one node online)
-	for _, node := range nodesAllowedToShutdown {
+	for i := 0; i < len(nodesAllowedToShutdown); i++ {
+		node := nodesAllowedToShutdown[nodesAllowedToShutdownKeys[i]]
+
 		if nodesLeftOnline == 1 {
 			break
 		}

farmerbot/internal/state.go

@@ -66,6 +66,8 @@ func fetchNodes(ctx context.Context, sub Substrate, rmbNodeClient RMB, config Co
 		return nil, err
 	}
 
+	farmNodes = addPriorityToNodes(config.PriorityNodes, farmNodes)
+
 	for _, nodeID := range farmNodes {
 		if slices.Contains(config.ExcludedNodes, nodeID) {
 			continue

farmerbot/internal/types.go

@@ -20,6 +20,7 @@ type Config struct {
 	FarmID                  uint32   `yaml:"farm_id"`
 	IncludedNodes           []uint32 `yaml:"included_nodes"`
 	ExcludedNodes           []uint32 `yaml:"excluded_nodes"`
+	PriorityNodes           []uint32 `yaml:"priority_nodes"`
 	NeverShutDownNodes      []uint32 `yaml:"never_shutdown_nodes"`
 	Power                   power    `yaml:"power"`
 	ContinueOnPoweringOnErr bool