hpyhacking/peatio · error

Invalid parameter name '{}' in pattern '{}'

Error message

Invalid parameter name '{}' in pattern '{}'

What it means

Error "Invalid parameter name '{}' in pattern '{}'" thrown in hpyhacking/peatio.

Source

Thrown at app/assets/javascripts/lib/angular-ui-router.js:700

  //    [^{}\\]+                  - anything other than curly braces or backslash
  //    \\.                       - a backslash escape
  //    \{(?:[^{}\\]+|\\.)*\}     - a matched set of curly braces containing other atoms
  var placeholder = /([:*])(\w+)|\{(\w+)(?:\:((?:[^{}\\]+|\\.|\{(?:[^{}\\]+|\\.)*\})+))?\}/g,
      compiled = '^', last = 0, m,
      segments = this.segments = [],
      params = this.params = {};

  /**
   * [Internal] Gets the decoded representation of a value if the value is defined, otherwise, returns the
   * default value, which may be the result of an injectable function.
   */
  function $value(value) {
    /*jshint validthis: true */
    return isDefined(value) ? this.type.decode(value) : $UrlMatcherFactory.$$getDefaultValue(this);
  }

  function addParameter(id, type, config) {
    if (!/^\w+(-+\w+)*$/.test(id)) throw new Error("Invalid parameter name '" + id + "' in pattern '" + pattern + "'");
    if (params[id]) throw new Error("Duplicate parameter name '" + id + "' in pattern '" + pattern + "'");
    params[id] = extend({ type: type || new Type(), $value: $value }, config);
  }

  function quoteRegExp(string, pattern, isOptional) {
    var result = string.replace(/[\\\[\]\^$*+?.()|{}]/g, "\\$&");
    if (!pattern) return result;
    var flag = isOptional ? '?' : '';
    return result + flag + '(' + pattern + ')' + flag;
  }

  function paramConfig(param) {
    if (!config.params || !config.params[param]) return {};
    var cfg = config.params[param];
    return isObject(cfg) ? cfg : { value: cfg };
  }

  this.source = pattern;

View on GitHub (pinned to dab8641137)

Solutions

1. Rename the URL parameter in the pattern to a valid identifier (letters, digits, underscore); remove characters that are not allowed in parameter names.

When it happens

Trigger: Thrown at app/assets/javascripts/lib/angular-ui-router.js:700 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of hpyhacking/peatio@dab8641137 (2026-08-23). Data as JSON: /api/errors/4bb97aca749ad81c. Report an issue: GitHub.