The file otr.min.js includes: - minified versions of the following otr.js dependencies: otr/dep/bigint.js otr/dep/crypto.js otr/dep/eventemitter.js The following minification tool has been used: yui compressor - minified version of otr.js taken from the project homepage All original files can be retrieved from otr.js repository: https://github.com/arlolra/otr/tree/master/build See the README file of Libervia, or inside otr.min.js itself for licence information.