From 18756c55339e65b2d3ef579b46e2967f1050ac1d Mon Sep 17 00:00:00 2001
From: Derrick Hammer <derrick@derrickhammer.com>
Date: Sun, 28 Aug 2022 13:07:45 -0400
Subject: [PATCH] *Initial version

---
 LICENSE       |   2 +-
 build.js      |   9 ++++
 build.sh      |   9 ++++
 package.json  |  17 ++++++++
 src/index.ts  | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++
 tsconfig.json |  14 ++++++
 6 files changed, 166 insertions(+), 1 deletion(-)
 create mode 100644 build.js
 create mode 100644 build.sh
 create mode 100644 package.json
 create mode 100644 src/index.ts
 create mode 100644 tsconfig.json

diff --git a/LICENSE b/LICENSE
index 13a5b6e..8995c8b 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2022 Lume Web
+Copyright (c) 2022 Hammer Technologies LLC
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/build.js b/build.js
new file mode 100644
index 0000000..dafa52b
--- /dev/null
+++ b/build.js
@@ -0,0 +1,9 @@
+import esbuild from 'esbuild'
+
+esbuild.buildSync({
+    entryPoints: ['src/index.ts'],
+    outfile: 'dist/handshake.js',
+    format: 'cjs',
+    bundle: true,
+    platform: "node"
+})
diff --git a/build.sh b/build.sh
new file mode 100644
index 0000000..c13ad15
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+node build.js
+mkdir -p dist/build/Release
+cp node_modules/bdb/build/Release/leveldown.node dist/build/Release/leveldown.node
+cp node_modules/bcrypto/build/Release/bcrypto.node dist/build/Release/bcrypto.node
+cp node_modules/goosig/build/Release/goosig.node dist/build/Release/goosig.node
+cp node_modules/mrmr/build/Release/mrmr.node dist/build/Release/mrmr.node
+cp node_modules/hsd/lib/covenants/names.db dist
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..1f10c77
--- /dev/null
+++ b/package.json
@@ -0,0 +1,17 @@
+{
+    "name": "@lumeweb/relay-plugin-handshake",
+    "type": "module",
+    "version": "0.1.0",
+    "scripts": {
+        "build": "bash build.sh"
+    },
+    "devDependencies": {
+        "@lumeweb/relay": "https://github.com/LumeWeb/relay.git",
+        "esbuild": "^0.15.5"
+    },
+    "dependencies": {
+        "hs-client": "^0.0.11",
+        "hsd": "^4.0.1",
+        "random-key": "^0.3.2"
+    }
+}
diff --git a/src/index.ts b/src/index.ts
new file mode 100644
index 0000000..130abdf
--- /dev/null
+++ b/src/index.ts
@@ -0,0 +1,116 @@
+import type {
+  Plugin,
+  PluginAPI,
+  RPCResponse,
+  RPCRequest,
+} from "@lumeweb/relay";
+// @ts-ignore
+import rand from "random-key";
+// @ts-ignore
+import SPVNode from "hsd/lib/node/spvnode.js";
+// @ts-ignore
+import { NodeClient } from "hs-client";
+
+async function boot(config: any) {
+  let hsdServer: SPVNode;
+
+  let clientArgs = {
+    network: "main",
+    host: "127.0.0.1",
+    port: 12037,
+    apiKey: rand.generate(),
+  };
+
+  if (!config.bool("hsd-use-external-node")) {
+    hsdServer = new SPVNode({
+      config: false,
+      argv: false,
+      env: true,
+      noDns: true,
+      memory: false,
+      httpHost: "127.0.0.1",
+      apiKey: clientArgs.apiKey,
+      logFile: false,
+      logConsole: true,
+      logLevel: "info",
+      workers: true,
+      network: "main",
+    });
+    hsdServer.on("abort", async (err: any) => {
+      const timeout = setTimeout(() => {
+        console.error("Shutdown is taking a long time. Exiting.");
+        process.exit(3);
+      }, 5000);
+
+      timeout.unref();
+
+      try {
+        console.error("Shutting down...");
+        await hsdServer.close();
+        clearTimeout(timeout);
+        console.error((err as Error).stack);
+        process.exit(2);
+      } catch (e: any) {
+        console.error(
+          `Error occurred during shutdown: ${(e as Error).message}`
+        );
+        process.exit(3);
+      }
+    });
+
+    (async () => {
+      try {
+        await hsdServer.ensure();
+        await hsdServer.open();
+        await hsdServer.connect();
+
+        hsdServer.startSync();
+      } catch (e: any) {
+        console.error((e as Error).stack);
+      }
+    })();
+  } else {
+    clientArgs = {
+      network: config.str("hsd-network-type"),
+      host: config.str("hsd-host"),
+      port: config.uint("hsd-port"),
+      apiKey: config.str("hsd-api-key"),
+    };
+  }
+
+  return new NodeClient(clientArgs);
+}
+
+const plugin: Plugin = {
+  name: "handshake",
+  async plugin(api: PluginAPI): Promise<void> {
+    const client = await boot(api.config);
+
+    api.registerMethod("getnameresource", {
+      cacheable: true,
+      async handler(request: RPCRequest): Promise<RPCResponse> {
+        let resp;
+        try {
+          resp = await client.execute("getnameresource", request.data);
+        } catch (e: any) {
+          e = e as Error;
+          const eType = e.type.toLowerCase();
+          const eMessage = e.message.toLowerCase();
+
+          if (
+            eType === "rpcerror" &&
+            eMessage.includes("chain is not synced")
+          ) {
+            throw new Error("NOT_READY");
+          }
+
+          throw e;
+        }
+
+        return resp;
+      },
+    });
+  },
+};
+
+export default plugin;
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..e9191d7
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,14 @@
+{
+    "compilerOptions": {
+        "target": "es2020",
+        "module": "commonjs",
+        "moduleResolution": "node",
+        "rootDir": "src",
+        "outDir": "dist",
+        "esModuleInterop": true,
+        "forceConsistentCasingInFileNames": true,
+        "strict": true,
+        "skipLibCheck": true,
+        "resolveJsonModule": true
+    }
+}