refactor(sia_js): universal JS SDK

sia_js/example/nodejs/index.js

@@ -1,4 +1,4 @@
-import { Seed, UnlockConditions } from "sia_js";
+import { Seed, UnlockConditions, Transaction } from "sia_js";
 
 try {
   const s = Seed.generate(),

sia_js/example/nodejs/package.json

@@ -5,6 +5,7 @@
   "author": "",
   "license": "MIT",
   "description": "",
+  "type":"module",
   "dependencies": {
     "sia_js": "file:../../pkg"
   }

sia_js/scripts/patch.mjs

@@ -0,0 +1,36 @@
+import fs from 'node:fs/promises';
+
+const packageName = 'sia_js';
+const wasmFilename = 'sia_js_bg.wasm';
+const jsFilename = 'sia_js.js';
+
+const rawWasmFile = await fs.readFile(`pkg/${wasmFilename}`);
+const origJsFile = await fs.readFile(`pkg/${jsFilename}`, 'utf8');
+
+const base64 = rawWasmFile.toString('base64');
+
+// Remove NodeJS specific APIs and inline WASM.
+const patchedJsFile = origJsFile
+    // TextEncoder and TextDecoder are globally available in NodeJS and browsers.
+    // inspect and inspect.custom are NodeJS specific APIs, replace with polyfill.
+    .replace('const { TextEncoder, TextDecoder, inspect } = require(`util`);',`
+const inspect = (obj) => JSON.stringify(obj, null, 2); `)
+    .replace('[inspect.custom]', `[Symbol.for('nodejs.util.inspect.custom')]`)
+    // Inline WASM.
+    .replace(`const path = require('path').join(__dirname, '${wasmFilename}');`, '')
+    .replace(`const bytes = require('fs').readFileSync(path);`, `
+const wasmBase64 = '${base64}';
+const bytes = Uint8Array.from(atob(wasmBase64), c => c.charCodeAt(0));`);
+
+await fs.writeFile(`pkg/${jsFilename}`, patchedJsFile);
+
+// Remove WASM files.
+await fs.unlink(`pkg/${wasmFilename}`);
+await fs.unlink(`pkg/${wasmFilename}.d.ts`);
+
+// Remove WASM from .files section of package.json.
+const pkgJsonFile = await fs.readFile('pkg/package.json', 'utf8');
+const pkgJson = JSON.parse(pkgJsonFile);
+pkgJson.name = packageName;
+pkgJson.files = pkgJson.files.filter(file => file !== wasmFilename);
+await fs.writeFile('pkg/package.json', JSON.stringify(pkgJson, null, 2));