Welcome to ERights.Org

Welcome to ERights.org, home of E,the secure distributed persistent languagefor capability-based smart contracting. The ERights Wiki We have moved much of this site to this wiki, and intend to move the remainder. Please check there first. Table of Contents Quick Start for E Language Programming:What’s New? What is E?Smart Contracts: […]

Welcome to ERights.org,
home of
the secure distributed persistent language
for capability-based smart contracting.

The ERights Wiki We have moved much of this site to this wiki, and intend to move the remainder. Please check there first.

Quick Start for E
Language Programming:

E has two
implementations: One based on Java and one based on Common Lisp.


Get E-on-Java. (All licenses
are Mozilla or Mozilla compatible open source licenses.)

E on Common Lisp Project

Kevin Reid’s E-on-CL project now has its own page. (All licenses
are MIT X or similar open source licenses.)

E online!

You don’t need to install E to try it out. Just join the IRC
channel #erights on irc.freenode.net, and type

? 1 + 1
E is described
by two draft books.

Robust Composition:
Towards a Unified Approach to Access Control and Concurrency

MarkM’s dissertation. Explains the rationale, philosophy, and
goals of E and related

E in a Walnut
E in a Walnut

Marc Stiegler’s draft tutorial book on the E
programming language. Now on the ERights
. Tutorial Additional useful introductory material. Quick Reference Card Reminders of some useful patterns you’ve learned. The ERights Wiki We intend to move much of the material currently at this website
into this wiki. Stay tuned. e-lang and
email archives Browse archived discussions of E and Capabilities. Here’s
some actual e-lang discussion as presented by Ping’s experimental
email browsing software. Here’s
a larger example
. An Ode to the Granovetter
Also known as Capability-based Financial Instruments. Explains
the rationale for E from
lambda-calculus concepts up through Smart Contracts. Combex logoCombex,
The for-profit facet of the E
project, featuring CapDesk
— the capability secure desktop, and caplet installation and launching

What’s New?

¬† Highlights of “What’s New?” past.

What is E?

E defines and implements
a pure object model of secure distributed persistent computation.
It has two parts:

ELib provides
the stuff that goes on between objects. Granovetter diagram As a pure-Java library, ELib provides
for inter-process capability-secure
distributed programming. Its cryptographic capability protocol
enables mutually suspicious Java processes to cooperate safely, and
its event-loop concurrency
and promise pipelining enable
high performance
distributed pure-object computing. The E
can be used to express what happens within
an object.
def alice {
    to doSomething() {

The E language provides
a convenient and familiar notation
for the ELib computational model, so you can program in one model
rather than two. Under the covers, this notation expands into Kernel-E,
a minimalist lambda-language much like Scheme or Smalltalk.

Objects written in the E
language are only able to interact with other objects according
to ELib’s semantics, enabling object granularity intra-process
security, including the ability to safely run untrusted mobile code
(such as caplets).

: Patterns of Cooperation without Vulnerability

Smart contract icon

A contract is a mutually agreeable arrangement of rules
among mutually suspicious parties so they may cooperate with limited
risks to each other’s mischief. It is a game both are willing to
play because both expect to win.

A conventional contract is passive paper interpreted at great expense
by lawyers and courts.

A smart contract is written in program code, in which the
logic of the program’s execution enforce the terms of the contract.
Smart contracts reduce costs by orders of magnitude, leading to
a more cooperative world.

Where does E come from?


Related Links

Feedback Please

webmaster-at-erights.org To send me comments directly. Here’s
my public key.
a bug
Please let us know of all problems you find. Thanks! Is this page Valid
If not, please tell me (the webmaster) or report
the bug
. Donations Please help support the E
Project. The best Java IDE We thank IntelliJ for their
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