Examples

Running one of the examples:

cargo run --example <name-of-the-example>

The follow examples exist:

echo-dialer will attempt to connect to /ip4/127.0.0.1/tcp/10333, negotiate the /echo/1.0.0 protocol, then send the "hello world" message. Compatible with the echo-server example.
echo-server will listen on /ip4/0.0.0.0/tcp/10333, negotiate the /echo/1.0.0 protocol with each incoming connection, then send back any entering message. Compatible with the echo-dialer example.
ping-client will try to connect to /ip4/127.0.0.1/tcp/4001, which is the default address of your local IPFS node if you're running one. It will then open a substream and ping the node.

How the keys were generated

The keys used in the examples were generated like this:

openssl genrsa -out private.pem 2048
openssl rsa -in private.pem -outform DER -pubout -out public.der
openssl pkcs8 -in private.pem -topk8 -nocrypt -out private.pk8
rm private.pem      # optional