chore: use monorepo organization

packages/server/lib/error.js

@@ -0,0 +1,27 @@
+const _ = require('lodash/fp')
+
+const E = function (name) {
+  var CustomErr = function (msg) {
+    this.message = msg || _.startCase(name)
+    this.name = name
+    Error.captureStackTrace(this, CustomErr)
+  }
+  CustomErr.prototype = Object.create(Error.prototype)
+  CustomErr.prototype.constructor = CustomErr
+  CustomErr.code = name
+
+  return CustomErr
+}
+
+module.exports = E
+
+function register (errorName) {
+  E[errorName] = E(errorName)
+}
+
+register('BadNumberError')
+register('NoDataError')
+register('InsufficientFundsError')
+register('StaleTxError')
+register('RatchetError')
+register('NotImplementedError')