diff --git a/main.js b/main.js
index 8a0ae13..d96d6e5 100644
--- a/main.js
+++ b/main.js
@@ -19,6 +19,7 @@ module.patchDate = require('./Date').patchDate
 
 // Additional types...
 module.containers = require('./containers')
+module.promise = require('./promise')
 
 
 
diff --git a/package.json b/package.json
index 6b35ba7..e6e2224 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ig-types",
-  "version": "2.0.21",
+  "version": "2.1.0",
   "description": "Generic JavaScript types and type extensions...",
   "main": "main.js",
   "scripts": {
diff --git a/promise.js b/promise.js
new file mode 100644
index 0000000..1950fbe
--- /dev/null
+++ b/promise.js
@@ -0,0 +1,78 @@
+/**********************************************************************
+* 
+*
+*
+**********************************************/  /* c8 ignore next 2 */
+((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
+(function(require){ var module={} // make module AMD/node compatible...
+/*********************************************************************/
+
+var object = require('ig-object')
+
+
+/*********************************************************************/
+
+var CooperativePromise =
+module.CooperativePromise =
+object.Constructor('CooperativePromise', Promise, {
+	// XXX do we actually need this???
+	__promise: null,
+
+	set: function(promise){
+		if(this.__promise === null){
+			// setting a non-promise...
+			if(promise.catch == null && promise.then == null){
+				Object.defineProperty(this, '__promise', {
+					value: false,
+					enumerable: false,
+				})
+				this.__resolve(promise)
+				
+			// setting a promise...
+			} else {
+				Object.defineProperty(this, '__promise', {
+					value: promise,
+					enumerable: false,
+				})
+
+				// connect the base and the set promises...
+				promise.catch(this.__reject.bind(this))
+				promise.then(this.__resolve.bind(this)) }
+
+			// cleanup...
+			delete this.__resolve
+			delete this.__reject
+
+		} else {
+			throw new Error('Setting a cooperative promise twice') } },
+
+	__new__: function(_, func){
+		var methods = {}
+		var obj = Reflect.construct(CooperativePromise.__proto__, [
+			function(resolve, reject){
+				methods.resolve = resolve
+				methods.reject = reject
+				func
+					&& func.call(this, ...arguments)
+			} ], CooperativePromise)
+		// XXX revise...
+		Object.defineProperties(obj, {
+			__resolve: {
+				value: methods.resolve,
+				enumerable: false,
+				configurable: true,
+			},
+			__reject: {
+				value: methods.reject,
+				enumerable: false,
+				configurable: true,
+			},
+		})
+		return obj },
+})
+
+
+
+
+/**********************************************************************
+* vim:set ts=4 sw=4 :                               */ return module })