Enabled snapshot by default

See PR #529

CHANGELOG.md

@@ -2,6 +2,7 @@
 - Require chain name to be lowercase ([#533](https://github.com/desmos-labs/desmos/pull/533))
 - Improved pagination ([#544](https://github.com/desmos-labs/desmos/pull/544))
 - Renamed `PollData` and `PollAnswer` to `Poll` and `ProvidedAnswer` ([#536]((https://github.com/desmos-labs/desmos/issues/536)))
+- Enabled snapshot by default ([#529](https://github.com/desmos-labs/desmos/pull/529))
 
 # Version 0.17.0
 ## Changes

app/desmos/cmd/init.go

@@ -0,0 +1,39 @@
+package cmd
+
+// DONTCOVER
+
+import (
+	"path/filepath"
+
+	"github.com/spf13/cobra"
+
+	"github.com/cosmos/cosmos-sdk/client"
+	srvconfig "github.com/cosmos/cosmos-sdk/server/config"
+	"github.com/cosmos/cosmos-sdk/types/module"
+	cosmosgenutilcli "github.com/cosmos/cosmos-sdk/x/genutil/client/cli"
+)
+
+// initCmd returns a command that initializes all files needed for Tendermint
+// and the respective application.
+func initCmd(mbm module.BasicManager, defaultNodeHome string) *cobra.Command {
+	cmd := cosmosgenutilcli.InitCmd(mbm, defaultNodeHome)
+	defaultRun := cmd.RunE
+	cmd.RunE = func(cmd *cobra.Command, args []string) error {
+		clientCtx := client.GetClientContextFromCmd(cmd)
+		err := defaultRun(cmd, args)
+		if err != nil {
+			return err
+		}
+		// Set app.toml file
+		appConfig := srvconfig.DefaultConfig()
+		appConfig.Pruning = "custom"
+		appConfig.PruningKeepRecent = "100"
+		appConfig.PruningKeepEvery = "500"
+		appConfig.PruningInterval = "10"
+
+		appConfig.StateSync.SnapshotInterval = 500
+		srvconfig.WriteConfigFile(filepath.Join(clientCtx.HomeDir, "config", "app.toml"), appConfig)
+		return nil
+	}
+	return cmd
+}

app/desmos/cmd/root.go

@@ -89,7 +89,7 @@ func initRootCmd(rootCmd *cobra.Command, encodingConfig params.EncodingConfig) {
 	authclient.Codec = encodingConfig.Marshaler
 
 	rootCmd.AddCommand(
-		cosmosgenutilcli.InitCmd(app.ModuleBasics, app.DefaultNodeHome),
+		initCmd(app.ModuleBasics, app.DefaultNodeHome),
 		cosmosgenutilcli.CollectGenTxsCmd(banktypes.GenesisBalancesIterator{}, app.DefaultNodeHome),
 		genutilcli.MigrationsListCmd(),
 		genutilcli.MigrateGenesisCmd(),

docs/fullnode/overview.md

@@ -25,6 +25,8 @@ Inside Desmos, there are various types of pruning strategies that can be applied
 
 - `everything`: all saved states will be deleted, storing only the current state; pruning at 10 block intervals
 
+- `custom`: allow pruning options to be manually specified through 'pruning-keep-recent', 'pruning-keep-every', and 'pruning-interval'
+
 ### Hardware requirements
 
 You can easily understand how using a pruning strategy of `nothing` will use more disk space than `everything`. For this

docs/fullnode/setup.md

@@ -170,6 +170,31 @@ trust_hash = "E8ED7A890A64986246EEB02D7D8C4A6D497E3B60C0CAFDDE30F2EE385204C314"
 trust_period = "168h0m0s"
 ```
 
+## (Optional) Edit snapshot config
+
+Currently, the `snapshot` feature is enabled by the default. This means that your node will periodically create snapshots of the chain state and make them public, allowing other nodes to quickly join the network by syncing the application state at a given height.
+
+By default, we have set Desmos to take snapshots every 500 blocks, and persist the last 2 snapshots, deleting older ones. If you want to provide other nodes with more (or less) frequent snapshots, you can do this by editing a couple of things inside your `~/.desmos/config/app.toml` file, under the `state-sync` section:
+
+```toml
+# snapshot-interval specifies the block interval at which local state sync snapshots are
+# taken (0 to disable). Must be a multiple of pruning-keep-every.
+snapshot-interval = 500
+
+# snapshot-keep-recent specifies the number of recent snapshots to keep and serve (0 to keep all).
+snapshot-keep-recent = 2
+```
+
+**Note: Make sure that snapshot-interval is a multiple of `pruning-keep-every` in the `base` section**
+
+```toml
+pruning-keep-recent = "100"
+pruning-keep-every = "500"
+pruning-interval = "10"
+```
+
+You can find out more about pruning [here](overview.md#understanding-pruning).
+
 ## (Optional) Change your database backend
 
 If you would like to run your node using [Facebook's RocksDB](https://github.com/facebook/rocksdb) as the database