refactor: prune everything (backport cosmos#11177) (cosmos#11258)

* refactor: prune everything (cosmos#11177)

(cherry picked from commit 75bcf47)

* updates

* updates

* updates

* updates

* updates

Co-authored-by: Aleksandr Bezobchuk <alexanderbez@users.noreply.github.com>
Co-authored-by: Aleksandr Bezobchuk <aleks.bezobchuk@gmail.com>

CHANGELOG.md

@@ -48,6 +48,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
+* (store) [\#11177](https://github.com/cosmos/cosmos-sdk/pull/11177) Update the prune `nothing` strategy to store the last two heights.
 * (store) [\#11117](https://github.com/cosmos/cosmos-sdk/pull/11117) Fix data race in store trace component
 
 ### Improvements

server/config/toml.go

@@ -25,6 +25,7 @@ minimum-gas-prices = "{{ .BaseConfig.MinGasPrices }}"
 # nothing: all historic states will be saved, nothing will be deleted (i.e. archiving node)
 # everything: 2 latest states will be kept; pruning at 10 block intervals.
 # custom: allow pruning options to be manually specified through 'pruning-keep-recent', and 'pruning-interval'
+
 pruning = "{{ .BaseConfig.Pruning }}"
 
 # These are applied if and only if the pruning strategy is custom.

store/types/pruning.go

@@ -0,0 +1,79 @@
+package types
+
+import "fmt"
+
+// Pruning option string constants
+const (
+	PruningOptionDefault    = "default"
+	PruningOptionEverything = "everything"
+	PruningOptionNothing    = "nothing"
+	PruningOptionCustom     = "custom"
+)
+
+var (
+	// PruneDefault defines a pruning strategy where the last 362880 heights are
+	// kept in addition to every 100th and where to-be pruned heights are pruned
+	// at every 10th height. The last 362880 heights are kept assuming the typical
+	// block time is 5s and typical unbonding period is 21 days. If these values
+	// do not match the applications' requirements, use the "custom" option.
+	PruneDefault = NewPruningOptions(362880, 100, 10)
+
+	// PruneEverything defines a pruning strategy where all committed heights are
+	// deleted, storing only the current height and where to-be pruned heights are
+	// pruned at every 10th height.
+	PruneEverything = NewPruningOptions(2, 0, 10)
+
+	// PruneNothing defines a pruning strategy where all heights are kept on disk.
+	PruneNothing = NewPruningOptions(0, 1, 0)
+)
+
+// PruningOptions defines the pruning strategy used when determining which
+// heights are removed from disk when committing state.
+type PruningOptions struct {
+	// KeepRecent defines how many recent heights to keep on disk.
+	KeepRecent uint64
+
+	// KeepEvery defines how many offset heights are kept on disk past KeepRecent.
+	KeepEvery uint64
+
+	// Interval defines when the pruned heights are removed from disk.
+	Interval uint64
+}
+
+func NewPruningOptions(keepRecent, keepEvery, interval uint64) PruningOptions {
+	return PruningOptions{
+		KeepRecent: keepRecent,
+		KeepEvery:  keepEvery,
+		Interval:   interval,
+	}
+}
+
+func (po PruningOptions) Validate() error {
+	if po.KeepEvery == 0 && po.Interval == 0 {
+		return fmt.Errorf("invalid 'Interval' when pruning everything: %d", po.Interval)
+	}
+	if po.KeepEvery == 1 && po.Interval != 0 { // prune nothing
+		return fmt.Errorf("invalid 'Interval' when pruning nothing: %d", po.Interval)
+	}
+	if po.KeepEvery > 1 && po.Interval == 0 {
+		return fmt.Errorf("invalid 'Interval' when pruning: %d", po.Interval)
+	}
+
+	return nil
+}
+
+func NewPruningOptionsFromString(strategy string) PruningOptions {
+	switch strategy {
+	case PruningOptionEverything:
+		return PruneEverything
+
+	case PruningOptionNothing:
+		return PruneNothing
+
+	case PruningOptionDefault:
+		return PruneDefault
+
+	default:
+		return PruneDefault
+	}
+}