Core lightning plugin to intercept HTLCs #101
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| @@ -26,3 +27,6 @@ tide = "0.16.0" | |||
| tracing = "0.1.26" | |||
| tracing-subscriber = { version = "0.3.1", features = [ "env-filter" ] } | |||
| tokio = {version = "1.0", features = ["full"]} | |||
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| # FIXME: kept getting `Error: attempted to set a logger after the logging system was already initialized` | |||
| log = "0.4.17" | |||
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It seemed like tracing and the cln_plugin logging system were in conflict somehow and I couldn't figure out exactly how. This is kind of weird because core-lightning plugins use stdin / stdout for IO and that might have something to do with it ...
| // .with_env_filter( | ||
| // EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("info")), | ||
| // ) | ||
| // .init(); |
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Just commented out the tracing code because we need to figure out how to get this working again and remove the log dependency I added for reasons mentioned above ...
| { | ||
| let workdir = match plugin.option("minimint-cfg").expect("minimint-cfg missing") { | ||
| options::Value::String(workdir) => { | ||
| // FIXME: cln_plugin doesn't yet support optional parameters |
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I'm going to add this to cln_plugin
| .min_final_cltv_expiry(144) | ||
| .payee_pub_key(node_public_key) | ||
| .private_route(gateway_route_hint) | ||
| .build_signed(|hash| self.context.secp.sign_recoverable(hash, &node_secret_key))?; |
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Some of these parameters I just copied from examples in the docs. Don't know exactly what all of them mean ...
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Re-reading #69 I think I still need to initialize the plugin to write RPC requests to stdout instead of the rpc socket ... |
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Yeah, that will make the rpc path in the GW config obsolete since cln will tell you where its RPC socket is on initialization (iirc). |
This is correct. Core-lightning sends this in the "configuration" section of the "init" message that is sent while the plugin is intializing. Problem is that |
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| let mut app = tide::with_state(state); | ||
| app.at("/pay_invoice").post(pay_invoice); | ||
| app.listen("27.0.0.1:8080").await?; |
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I'm going to close this and open a new pull request with the core lightning plugin ... |
TLDR this PR turns
ln_gatewayinto a core-lightning "plugin" so that it can intercept HTLCs using the htlc_accepted hook. In the future this will allow the gateway to buy the preimage from the federation and complete incoming lightning payments. Right now a preimage is hard-coded. I made a new file for this plugin since it's not really done yet ...This PR also creates a new
UserClient::create_invoice(amount)method to create a lightning invoice which will allow the gateway to receive payment and (eventually) figure out which preimage to buy from the federation.Perhaps I should squash commits or break this up into a couple PRs? I'll leave some comments inline ...