Initial commit

.ENVRC_EXAMPLE

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+nvmrc=~/.nvm/nvm.sh
+if [ -e $nvmrc ]; then
+  source $nvmrc
+  nvm use
+fi
+
+PATH_add node_modules/.bin

.gitignore

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+.envrc
+
+node_modules
+dist

.nvmrc

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+15.3.0

README.md

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+# Aggregation service
+
+Aggregates transactions signed with a BLS pub/priv key pair, for use with this [BLS Wallet](https://github.com/jzaki/bls-wallet)
+
+
+## Development
+
+Uses yarn, node express, typescript, mysql.
+
+- clone repo
+- yarn install
+- `.envrc` from .ENVRC_EXAMPLE (`direnv` is useful to auto-load)
+- Install/run mysql for your OS (Ubuntu: `apt install mysql-server`, `sudo systemctl start mysql`)
+- 
+
+

package.json

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+{
+  "name": "bls-aggregation-service",
+  "version": "1.0.0",
+  "description": "Signature aggregation service for L2 Ethereum BLS Wallet",
+  "main": "index.js",
+  "scripts": {
+    "build-ts": "tsc",
+    "postinstall": "npm run build-ts",
+    "agg": "node dist/agg.js",
+    "watch-node": "nodemon dist/agg.js",
+    "watch-ts": "tsc -w",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "James Zaki",
+  "license": "MIT",
+  "private": true,
+  "dependencies": {},
+  "devDependencies": {
+    "@types/express": "^4.17.11",
+    "@types/mysql": "^2.15.17",
+    "connect-livereload": "^0.6.1",
+    "express": "^4.17.1",
+    "livereload": "^0.9.1",
+    "mysql": "^2.18.1",
+    "nodemon": "^2.0.7",
+    "path": "^0.12.7",
+    "prettier": "^2.2.1",
+    "tslint": "^6.1.3",
+    "tslint-config-prettier": "^1.18.0",
+    "tslint-plugin-prettier": "^2.3.0",
+    "typescript": "^4.1.3"
+  }
+}

src/agg.ts

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+import express from 'express';
+import { AddressInfo } from 'net';
+import path from 'path';
+
+import mysql from 'mysql';
+
+
+var con = mysql.createConnection({
+  host: "localhost",
+  user: "username",
+  password: "password",
+  // database: "bls_aggregator"
+});
+
+con.connect(function(err) {
+  if (err) throw err;
+  con.query("CREATE DATABASE IF NOT EXISTS bls_aggregator", function (err, result) {
+    if (err) throw err;
+  });
+  con.query("USE bls_aggregator", function (err, result) {
+    if (err) throw err;
+  });
+  con.query("DROP TABLE IF EXISTS bls_aggregator", function(err, result) {
+    if (err) throw err;
+  });
+  con.query("CREATE TABLE IF NOT EXISTS txs( \
+      tx_id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY, \
+      bls_pub_0 INT, \
+      bls_pub_1 INT, \
+      bls_pub_2 INT, \
+      bls_pub_3 INT, \
+      message_0 BINARY(32), \
+      message_1 BINARY(32), \
+      signature INT UNSIGNED, \
+      recipient BINARY(20), \
+      amount BINARY(32) \
+      );", function(err, result) {
+        if (err) throw err;
+  })
+});
+
+const server = express();
+
+const port = 3000;
+server.listen(port, () => {
+  return console.log(`Listening on ${port}`);
+});
+
+server.get('/', (req, res) => {
+  res.send('Post txs to /addTx. Request txs from /latestTxs');
+});
+
+server.post('/addTx', (req, res) => {
+  res.send(`Adding ${req}`);
+  //TODO: store signed tx and bls sig. (incremental aggregation?)
+
+  //TODO: send tx(s) after batch count, or N ms since last send.
+});
+
+
+server.get('/latestTxs', (req, res) => {
+  res.send(`Result: ${req}`);
+  sendTxs();
+});
+
+function sendTxs() {
+  //if less than 3, send as singles, else
+  //TODO: aggregate bls sigs, return: sig, senders, txs, params
+}

tsconfig.json

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+{
+  "compilerOptions": {
+    /* Visit https://aka.ms/tsconfig.json to read more about this file */
+
+    /* Basic Options */
+    // "incremental": true,                   /* Enable incremental compilation */
+    "target": "es5",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
+    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
+    "lib": ["es2015"],                             /* Specify library files to be included in the compilation. */
+    // "allowJs": true,                       /* Allow javascript files to be compiled. */
+    // "checkJs": true,                       /* Report errors in .js files. */
+    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
+    // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
+    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
+   "sourceMap": true,                     /* Generates corresponding '.map' file. */
+    // "outFile": "./",                       /* Concatenate and emit output to single file. */
+    "outDir": "dist",                         /* Redirect output structure to the directory. */
+    "rootDir": "src",                         /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    // "composite": true,                     /* Enable project compilation */
+    // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
+    // "removeComments": true,                /* Do not emit comments to output. */
+    // "noEmit": true,                        /* Do not emit outputs. */
+    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
+    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
+    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+
+    /* Strict Type-Checking Options */
+    "strict": true,                           /* Enable all strict type-checking options. */
+    // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,              /* Enable strict null checks. */
+    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
+    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                /* Report errors on unused locals. */
+    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+    // "noUncheckedIndexedAccess": true,      /* Include 'undefined' in index signature results */
+
+    /* Module Resolution Options */
+    "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
+    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
+    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
+    // "typeRoots": [],                       /* List of folders to include type definitions from. */
+    // "types": [],                           /* Type declaration files to be included in compilation. */
+    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
+    // "allowUmdGlobalAccess": true,          /* Allow accessing UMD globals from modules. */
+
+    /* Source Map Options */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
+    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
+
+    /* Advanced Options */
+    "skipLibCheck": true,                     /* Skip type checking of declaration files. */
+    "forceConsistentCasingInFileNames": true  /* Disallow inconsistently-cased references to the same file. */
+  }
+}

tslint.json

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+{
+    "defaultSeverity": "error",
+    "extends": [
+        "tslint:recommended"
+    ],
+    "jsRules": {},
+    "rules": {
+        "no-console": false
+    },
+    "rulesDirectory": []
+}