From c4d5e8a7ab12239f380a438046e6e994f0253ab3 Mon Sep 17 00:00:00 2001
From: Eduard S <eduard@iden3.io>
Date: Fri, 26 Feb 2021 13:09:13 +0100
Subject: [PATCH] WIP

---
 cli/node/main.go | 10 ++++++----
 config/config.go | 24 ++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/cli/node/main.go b/cli/node/main.go
index b95e141..d7bf69d 100644
--- a/cli/node/main.go
+++ b/cli/node/main.go
@@ -144,10 +144,15 @@ func cmdRun(c *cli.Context) error {
 }
 
 func cmdServeAPI(c *cli.Context) error {
-	cfg, err := parseCli(c)
+	cfgPath := c.String(flagCfg)
+	cfg, err := config.LoadAPIServer(cfgPath)
 	if err != nil {
+		if err := cli.ShowAppHelp(c); err != nil {
+			panic(err)
+		}
 		return tracerr.Wrap(fmt.Errorf("error parsing flags and config: %w", err))
 	}
+
 	node, err := node.NewNode(cfg.mode, cfg.node)
 	if err != nil {
 		return tracerr.Wrap(fmt.Errorf("error starting node: %w", err))
@@ -261,9 +266,6 @@ func getConfig(c *cli.Context) (*Config, error) {
 	var cfg Config
 	mode := c.String(flagMode)
 	nodeCfgPath := c.String(flagCfg)
-	if nodeCfgPath == "" {
-		return nil, tracerr.Wrap(fmt.Errorf("required flag \"%v\" not set", flagCfg))
-	}
 	var err error
 	switch mode {
 	case modeSync:
diff --git a/config/config.go b/config/config.go
index 463807c..f517497 100644
--- a/config/config.go
+++ b/config/config.go
@@ -338,6 +338,17 @@ type APIServer struct {
 			Coordinator bool
 		} `validate:"required"`
 	} `validate:"required"`
+	L2DB struct {
+		// MaxTxs is the maximum number of pending L2Txs that can be
+		// stored in the pool.  Once this number of pending L2Txs is
+		// reached, inserts to the pool will be denied until some of
+		// the pending txs are forged.
+		MaxTxs uint32 `validate:"required"`
+		// MinFeeUSD is the minimum fee in USD that a tx must pay in
+		// order to be accepted into the pool.  Txs with lower than
+		// minimum fee will be rejected at the API level.
+		MinFeeUSD float64
+	} `validate:"required"`
 	Debug NodeDebug `validate:"required"`
 }
 
@@ -382,3 +393,16 @@ func LoadNode(path string) (*Node, error) {
 	}
 	return &cfg, nil
 }
+
+// LoadAPIServer loads the APIServer configuration from path.
+func LoadAPIServer(path string) (*APIServer, error) {
+	var cfg APIServer
+	if err := Load(path, &cfg); err != nil {
+		return nil, tracerr.Wrap(fmt.Errorf("error loading apiServer configuration file: %w", err))
+	}
+	validate := validator.New()
+	if err := validate.Struct(cfg); err != nil {
+		return nil, tracerr.Wrap(fmt.Errorf("error validating configuration file: %w", err))
+	}
+	return &cfg, nil
+}