126 lines
4.7 KiB
Markdown
126 lines
4.7 KiB
Markdown
# Overview
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DragonX Lightwalletd is a fork of [Hush lightwalletd](https://git.hush.is/hush/lightwalletd) which is itself a fork of [lightwalletd](https://github.com/adityapk00/lightwalletd) originally from Zcash (ZEC).
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It is a backend service that provides a bandwidth-efficient interface to the DragonX blockchain for light wallet clients.
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## Features
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* Support for DragonX (standalone chain with `dragonxd`)
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* Support for transparent addresses
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* Several RPC calls for light clients
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* Lots of perf improvements
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* In-memory cache for Compact Blocks (replaces SQLite)
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* Tx lookups delegated to dragonxd
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* No separate ingestor needed
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## Running your own DragonX lightwalletd
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#### 0. First, install Go
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You will need Go >= 1.13 which you can download from the official [download page](https://golang.org/dl/) or install via your OS package manager.
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This [installation](https://golang.org/doc/install) document shows how to do it on various OS's.
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If you're using Ubuntu or Debian, try:
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```
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$ sudo apt install golang
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```
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#### 1. Run a DragonX node.
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Install the DragonX daemon (`dragonxd`) and CLI (`dragonx-cli`).
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Next, ensure your DRAGONX.conf file (at `~/.hush/DRAGONX/DRAGONX.conf`) has something like the following:
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```
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rpcuser=user-CHANGETHIS
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rpcpassword=pass-CHANGETHIS
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rpcport=21769
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server=1
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txindex=1
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rpcworkqueue=256
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rpcallowip=127.0.0.1
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rpcbind=127.0.0.1
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```
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Then start `dragonxd`. You might need to run with `-reindex` the first time if you are enabling the `txindex` option for the first time. The reindex might take a while.
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#### 2. Compile lightwalletd
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Run the build script.
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```
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make build
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```
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#### 3. Get a TLS certificate and run the Lightwalletd frontend
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First, get a TLS certificate:
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On Ubuntu Linux, **I SUGGEST YOU DO NOT USE SNAPD** and just ```sudo apt install certbot``` and then start on [Step 7 of these instructions by the EFF](https://certbot.eff.org/instructions)
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Next you decide how you want to setup lightwalletd - with (Option A) or without NGINX (Option B).
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##### Option A: "Let's Encrypt" certificate using NGINX as a reverse proxy
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If you running a public-facing server, the easiest way to obtain a certificate is to use a NGINX reverse proxy and get a Let's Encrypt certificate.
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Create a new section for the NGINX reverse proxy:
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```
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server {
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listen 443 ssl http2;
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listen [::]:443 ssl http2;
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server_name your_host.net;
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ssl_certificate /etc/letsencrypt/live/your_host.net/fullchain.pem; # managed by Certbot
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ssl_certificate_key /etc/letsencrypt/live/your_host.net/privkey.pem; # managed by Certbot
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include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
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ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
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location / {
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# Replace localhost:9069 with the address and port of your gRPC server if using a custom port
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grpc_pass grpc://your_host.net:9069;
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}
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}
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```
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Then run the lightwalletd frontend with the following (Note: we use the "-no-tls" option as we are using NGINX as a reverse proxy and letting it handle the TLS authentication for us instead):
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```
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./lightwalletd -bind-addr your_host.net:9069 -conf-file ~/.hush/DRAGONX/DRAGONX.conf -no-tls
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```
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##### Option B: "Let's Encrypt" certificate just using lightwalletd without NGINX
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The other option is to configure lightwalletd to handle its own TLS authentication. Once you have a certificate that you want to use (from a certificate authority), pass the certificate to the frontend as follows:
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```
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./lightwalletd -bind-addr 127.0.0.1:9069 -conf-file ~/.hush/DRAGONX/DRAGONX.conf -tls-cert /etc/letsencrypt/live/YOURWEBSITE/fullchain.pem -tls-key /etc/letsencrypt/live/YOURWEBSITE/privkey.pem
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```
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#### 4. Point a light wallet client to this server
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You should start seeing the frontend ingest and cache the DragonX blocks after ~15 seconds.
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## Lightwalletd Command-line Options
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These are the current different command line options for lightwalletd:
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| CLI option | Default | What it does |
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|------------|:--------------:|------------------------------:|
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| -bind-addr | 127.0.0.1:9069 | address and port to listen on |
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| -tls-cert | blank | the path to a TLS certificate |
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| -tls-key | blank | the path to a TLS key file |
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| -no-tls | false | Disable TLS, serve un-encrypted traffic |
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| -log-file | blank | log file to write to |
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| -log-level | logrus.InfoLevel | log level 1 thru 7 (something from logrus)|
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| -conf-file | blank | conf file to pull RPC creds from |
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| -cache-size| 40000 | number of blocks to hold in the cache |
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## Support
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For support or other questions, join us on [Telegram](https://hush.is/telegram) or join [Telegram Support](https://hush.is/telegram_support).
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## License
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GPLv3 or later
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# Copyright
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2016-2022 The Hush Developers
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2024-2026 The DragonX Developers
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