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52 lines
1.7 KiB
Markdown
52 lines
1.7 KiB
Markdown
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# p2p chat app with libp2p
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This program demonstrates a simple p2p chat application. It can work between two peers if
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1. Both have a private IP address (same network).
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2. At least one of them has a public IP address.
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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.
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Usage: Run `./chat -sp <SOURCE_PORT>` on host 'B' where <SOURCE_PORT> can be any port number. Now run `./chat -d <MULTIADDR_B>` on node 'A' [`<MULTIADDR_B>` is multiaddress of host 'B' which can be obtained from host 'B' console].
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## Build
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From the `go-libp2p/examples` directory run the following:
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```
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> cd chat/
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> go build
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```
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## Usage
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On node 'B'
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```
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> ./chat -sp 3001
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Run ./chat -d /ip4/127.0.0.1/tcp/3001/p2p/QmdXGaeGiVA745XorV1jr11RHxB9z4fqykm6xCUPX1aTJo
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2018/02/27 01:21:32 Got a new stream!
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> hi (received messages in green colour)
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> hello (sent messages in white colour)
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> no
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```
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On node 'A'. Replace 127.0.0.1 with <PUBLIC_IP> if node 'B' has one.
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```
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> ./chat -d /ip4/127.0.0.1/tcp/3001/p2p/QmdXGaeGiVA745XorV1jr11RHxB9z4fqykm6xCUPX1aTJo
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Run ./chat -d /ip4/127.0.0.1/tcp/3001/p2p/QmdXGaeGiVA745XorV1jr11RHxB9z4fqykm6xCUPX1aTJo
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This node's multiaddress:
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/ip4/0.0.0.0/tcp/0/p2p/QmWVx9NwsgaVWMRHNCpesq1WQAw2T3JurjGDNeVNWifPS7
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> hi
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> hello
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```
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**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.**
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**Note:** If you are looking for an implementation with peer discovery, [chat-with-rendezvous](../chat-with-rendezvous), supports peer discovery using a rendezvous point.
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## Authors
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1. Abhishek Upperwal
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