Move config into it's own package.

config/config.go

@@ -0,0 +1,55 @@
+
+package config
+
+import (
+    "io/ioutil"
+    "encoding/json"
+)
+
+const NULL_BLOCK_NUMBER uint32 = 0xffffffff
+
+type RedisConfig struct {
+    Addr string `json:"addr"`
+    Password string `json:"password"`
+    DB int `json:db`
+    CacheID string `json:"cache_id"`
+}
+
+type Config struct {
+    ShipApi string `json:"ship_api"`
+    Api string `json:"api"`
+
+    Redis RedisConfig `json:"redis"`
+
+    IrreversibleOnly bool `json:"irreversible_only"`
+    MaxMessagesInFlight uint32 `json:"max_messages_in_flight"`
+    StartBlockNum uint32 `json:"start_block_num"`
+    EndBlockNum uint32 `json:"end_block_num"`
+}
+
+func Load(filename string) (Config, error) {
+
+    cfg := Config{
+        StartBlockNum: NULL_BLOCK_NUMBER,
+        EndBlockNum: NULL_BLOCK_NUMBER,
+        MaxMessagesInFlight: 10,
+        IrreversibleOnly: false,
+        Redis: RedisConfig{
+            Addr: "localhost:6379",
+            Password: "",
+            DB: 0,
+        },
+    }
+
+    bytes, err := ioutil.ReadFile(filename)
+    if err != nil {
+        return cfg, err
+    }
+
+    err = json.Unmarshal(bytes, &cfg)
+    if err != nil {
+        return cfg, err
+    }
+
+    return cfg, nil
+}