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atomic-swap/docs/bootnode.md
2023-04-24 17:23:28 -04:00

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# Bootnode
The swap daemon uses a p2p network to discover offer-makers to do a swap with, and also the
run the actual swap protocol. A node must know addresses of nodes already in the network to
join the network. These nodes are often publicly posted and referred to as bootnodes.
Bootnodes act as an entry-point into the p2p network.
This repo comes with a `bootnode` program that runs only the p2p components of a swap node,
and thus can be used as a lightweight bootnode.
## Requirements
- see [build instructions](./build.md) for installation requirements.
## Build and run
To build and run the bootnode binary:
```bash
make build-all
./bin/bootnode --env ENVIRONMENT
```
`ENVIRONMENT` is one of `mainnet`, `stagenet`, or `dev`.
To get the p2p addresses of the bootnode:
```bash
./bin/swapcli addresses
```
You can then distribute these addresses for other swap nodes to connect to.
## Docker
1. Ensure docker is installed on your machine.
2. Build the docker image:
```bash
make docker-images
```
3. For an example of how to run `bootnode` with docker on mainnet:
```bash
SWAPD_ENV=mainnet ./scripts/docker-bootnode/run-docker-image.sh
```
This runs `swapd` on mainnet. The container name is `bootnode-mainnet`.
By default, `SWAPD_ENV` is currently set to `stagenet`, so be sure to set the environment variable to run on mainnet.
You can interact with it by running `swapcli` inside the container:
```bash
docker exec CONTAINER_NAME_OR_ID swapcli SUBCOMMAND ...
```