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71 lines
2.4 KiB
Markdown
71 lines
2.4 KiB
Markdown
# Mixnet simulation
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## Aim
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Simulate a local mixnet along with a chat app to publish using mix.
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This is helpful to test any changes while development.
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It includes scripts that run a `4 node` mixnet along with a lightpush service node(without mix) that can be used to test quickly.
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## Simulation Details
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Note that before running the simulation both `wakunode2` and `chat2mix` have to be built.
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```bash
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cd <repo-root-dir>
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make wakunode2
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make chat2mix
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```
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Simulation includes scripts for:
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1. a 4 waku-node mixnet where `node1` is bootstrap node for the other 3 nodes.
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2. scripts to run chat app that publishes using lightpush protocol over the mixnet
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## Usage
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Start the service node with below command, which acts as bootstrap node for all other mix nodes.
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`./run_lp_service_node.sh`
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To run the nodes for mixnet run the 4 node scripts in different terminals as below.
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`./run_mix_node1.sh`
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Look for following 2 log lines to ensure node ran successfully and has also mounted mix protocol.
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```log
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INF 2025-08-01 14:51:05.445+05:30 mounting mix protocol topics="waku node" tid=39996871 file=waku_node.nim:231 nodeId="(listenAddresses: @[\"/ip4/127.0.0.1/tcp/60001/p2p/16Uiu2HAmPiEs2ozjjJF2iN2Pe2FYeMC9w4caRHKYdLdAfjgbWM6o\"], enrUri: \"enr:-NC4QKYtas8STkenlqBTJ3a1TTLzJA2DsGGbFlnxem9aSM2IXm-CSVZULdk2467bAyFnepnt8KP_QlfDzdaMXd_zqtwBgmlkgnY0gmlwhH8AAAGHbWl4LWtleaCdCc5iT3bo9gYmXtucyit96bQXcqbXhL3a-S_6j7p9LIptdWx0aWFkZHJzgIJyc4UAAgEAAIlzZWNwMjU2azGhA6RFtVJVBh0SYOoP8xrgnXSlpiFARmQkF9d8Rn4fSeiog3RjcILqYYN1ZHCCIymFd2FrdTIt\")"
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INF 2025-08-01 14:49:23.467+05:30 Node setup complete topics="wakunode main" tid=39994244 file=wakunode2.nim:104
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```
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Once all the 4 nodes are up without any issues, run the script to start the chat application.
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`./run_chat_app.sh`
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Enter a nickname to be used.
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```bash
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pubsub topic is: /waku/2/rs/2/0
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Choose a nickname >>
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```
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Once you see below log, it means the app is ready for publishing messages over the mixnet.
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```bash
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Welcome, test!
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Listening on
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/ip4/192.168.68.64/tcp/60000/p2p/16Uiu2HAkxDGqix1ifY3wF1ZzojQWRAQEdKP75wn1LJMfoHhfHz57
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ready to publish messages now
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```
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Follow similar instructions to run second instance of chat app.
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Once both the apps run successfully, send a message and check if it is received by the other app.
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You can exit the chat apps by entering `/exit` as below
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```bash
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>> /exit
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quitting...
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```
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