config/validator: add some validation methods.

lib/node/config.js

@@ -284,17 +284,88 @@ Config.prototype.num = function num(key, fallback) {
 
   if (typeof value !== 'string') {
     if (typeof value !== 'number')
-      throw new Error(key + ' must be a string.');
+      throw new Error(key + ' must be a positive integer.');
     return value;
   }
 
   if (!/^\d+$/.test(value))
-    throw new Error(key + ' must be a number.');
+    throw new Error(key + ' must be a positive integer.');
 
   value = parseInt(value, 10);
 
   if (!isFinite(value))
-    throw new Error(key + ' must be a number.');
+    throw new Error(key + ' must be a positive integer.');
+
+  return value;
+};
+
+/**
+ * Get a config option (as a float).
+ * @param {String} key
+ * @param {Object?} fallback
+ * @returns {Number|null}
+ */
+
+Config.prototype.flt = function flt(key, fallback) {
+  var value = this.get(key);
+
+  if (fallback === undefined)
+    fallback = null;
+
+  if (value === null)
+    return fallback;
+
+  if (typeof value !== 'string') {
+    if (typeof value !== 'number')
+      throw new Error(key + ' must be a float.');
+    return value;
+  }
+
+  if (!/^\d*(?:\.\d*)?$/.test(value))
+    throw new Error(key + ' must be a float.');
+
+  value = parseFloat(value);
+
+  if (!isFinite(value))
+    throw new Error(key + ' must be a float.');
+
+  return value;
+};
+
+/**
+ * Get a value (as a satoshi number or btc string).
+ * @param {String} key
+ * @param {Object?} fallback
+ * @returns {Number|null}
+ */
+
+Config.prototype.amt = function amt(key, fallback) {
+  var value = this.get(key);
+
+  if (fallback === undefined)
+    fallback = null;
+
+  if (value === null)
+    return fallback;
+
+  if (typeof value !== 'string') {
+    if (typeof value !== 'number')
+      throw new Error(key + ' must be an amount.');
+    return value;
+  }
+
+  if (!/^\d+(\.\d{0,8})?$/.test(value))
+    throw new Error(key + ' must be an amount.');
+
+  value = parseFloat(value);
+
+  if (!isFinite(value))
+    throw new Error(key + ' must be an amount.');
+
+  value *= 1e8;
+
+  if (value % 1 !== 0 || value < 0 || value > 0x1fffffffffffff)
+    throw new Error(key + ' must be an amount (uint64).');
 
   return value;
 };

lib/utils/validator.js

@@ -153,6 +153,39 @@ Validator.prototype.num = function num(key, fallback) {
   return value;
 };
 
+/**
+ * Get a value (as a number).
+ * @param {String} key
+ * @param {Object?} fallback
+ * @returns {Number|null}
+ */
+
+Validator.prototype.flt = function flt(key, fallback) {
+  var value = this.get(key);
+
+  if (fallback === undefined)
+    fallback = null;
+
+  if (value === null)
+    return fallback;
+
+  if (typeof value !== 'string') {
+    if (typeof value !== 'number')
+      throw new ValidationError(fmt(key) + ' must be a float.');
+    return value;
+  }
+
+  if (!/^\d*(?:\.\d*)?$/.test(value))
+    throw new ValidationError(fmt(key) + ' must be a float.');
+
+  value = parseFloat(value);
+
+  if (!isFinite(value))
+    throw new ValidationError(fmt(key) + ' must be a float.');
+
+  return value;
+};
+
 /**
  * Get a value (as a uint32).
  * @param {String} key
@@ -259,22 +292,22 @@ Validator.prototype.amt = function amt(key, fallback) {
 
   if (typeof value !== 'string') {
     if (typeof value !== 'number')
-      throw new ValidationError(fmt(key) + ' must be a number.');
+      throw new ValidationError(fmt(key) + ' must be an amount.');
     return value;
   }
 
   if (!/^\d+(\.\d{0,8})?$/.test(value))
-    throw new ValidationError(fmt(key) + ' must be a number.');
+    throw new ValidationError(fmt(key) + ' must be an amount.');
 
   value = parseFloat(value);
 
   if (!isFinite(value))
-    throw new ValidationError(fmt(key) + ' must be a number.');
+    throw new ValidationError(fmt(key) + ' must be an amount.');
 
   value *= 1e8;
 
   if (value % 1 !== 0 || value < 0 || value > 0x1fffffffffffff)
-    throw new ValidationError(fmt(key) + ' must be a uint64.');
+    throw new ValidationError(fmt(key) + ' must be an amount (uint64).');
 
   return value;
 };
@@ -298,7 +331,7 @@ Validator.prototype.btc = function btc(key, fallback) {
   value *= 1e8;
 
   if (value % 1 !== 0 || value < 0 || value > 0x1fffffffffffff)
-    throw new ValidationError(fmt(key) + ' must be a uint64.');
+    throw new ValidationError(fmt(key) + ' must be a btc float (uint64).');
 
   return value;
 };