# p2p chat app with libp2p This program demonstrates a simple p2p chat application. It can work between two peers if 1. Both have a private IP address (same network). 2. At least one of them has a public IP address. Assume if 'A' and 'B' are on different networks host 'A' may or may not have a public IP address but host 'B' has one. Usage: Run `./chat -sp ` on host 'B' where can be any port number. Now run `./chat -d ` on node 'A' [`` is multiaddress of host 'B' which can be obtained from host 'B' console]. ## Build From the `go-libp2p/examples` directory run the following: ``` > cd chat/ > go build ``` ## Usage On node 'B' ``` > ./chat -sp 3001 Run ./chat -d /ip4/127.0.0.1/tcp/3001/p2p/QmdXGaeGiVA745XorV1jr11RHxB9z4fqykm6xCUPX1aTJo 2018/02/27 01:21:32 Got a new stream! > hi (received messages in green colour) > hello (sent messages in white colour) > no ``` On node 'A'. Replace 127.0.0.1 with if node 'B' has one. ``` > ./chat -d /ip4/127.0.0.1/tcp/3001/p2p/QmdXGaeGiVA745XorV1jr11RHxB9z4fqykm6xCUPX1aTJo Run ./chat -d /ip4/127.0.0.1/tcp/3001/p2p/QmdXGaeGiVA745XorV1jr11RHxB9z4fqykm6xCUPX1aTJo This node's multiaddress: /ip4/0.0.0.0/tcp/0/p2p/QmWVx9NwsgaVWMRHNCpesq1WQAw2T3JurjGDNeVNWifPS7 > hi > hello ``` **NOTE: debug mode is enabled by default, debug mode will always generate the same node id (on each node) on every execution. Disable debug using `--debug false` flag while running your executable.** **Note:** If you are looking for an implementation with peer discovery, [chat-with-rendezvous](../chat-with-rendezvous), supports peer discovery using a rendezvous point. ## Authors 1. Abhishek Upperwal