fix: chainbuilder empty first block + use PebbleDB for block and state stores + cosmetics

tools/chainbuilder/README.md

@@ -10,7 +10,7 @@ Use `go` to run the binary as follows:
 go run ./tools/chainbuilder
 ```
 
-This will create a directory with the name `testnode-{chainID}`. All files will be populated and blocks generated based on specified input. You can run a validator on the file system afterwards by calling:
+This will create a directory with the name `testnode-{chainID}`. All files will be populated and blocks generated based on specified input. You can run a validator on the file system afterward by calling:
 
 ```shell
 celestia-appd start --home /path/to/testnode-{chainID}
@@ -19,9 +19,8 @@ celestia-appd start --home /path/to/testnode-{chainID}
 The following are the set of options when generating a chain:
 
 - `num-blocks` the number of blocks to be generated (default: 100)
-- `block-size` the size of the blocks to be generated (default <2MB). This will be a single PFB transaction
-- `square-size` the size of the max square (default: 128)
+- `block-size` the size of the blocks to be generated in bytes (default <2MB). This will be a single PFB transaction
 - `existing-dir` point this to a directory if you want to extend an existing chain rather than create a new one
-- `namespace` allows you to pick a custom v0 namespace. By default "test" will be chosen.
+- `namespace` allows you to pick a custom v0 namespace. By default, "test" will be chosen.
 
 This tool takes roughly 60-70ms per 2MB block.

tools/chainbuilder/main.go

@@ -175,14 +175,14 @@ func Run(ctx context.Context, cfg BuilderConfig, dir string) error {
 	validatorKey := privval.LoadFilePV(tmCfg.PrivValidatorKeyFile(), tmCfg.PrivValidatorStateFile())
 	validatorAddr := validatorKey.Key.Address
 
-	blockDB, err := dbm.NewDB("blockstore", dbm.GoLevelDBBackend, tmCfg.DBDir())
+	blockDB, err := dbm.NewDB("blockstore", dbm.PebbleDBBackend, tmCfg.DBDir())
 	if err != nil {
 		return fmt.Errorf("failed to create block database: %w", err)
 	}
 
 	blockStore := store.NewBlockStore(blockDB)
 
-	stateDB, err := dbm.NewDB("state", dbm.GoLevelDBBackend, tmCfg.DBDir())
+	stateDB, err := dbm.NewDB("state", dbm.PebbleDBBackend, tmCfg.DBDir())
 	if err != nil {
 		return fmt.Errorf("failed to create state database: %w", err)
 	}