README

PEER-AI

About - Peerism API built with Truffle, Node.js, Express.js, Mongoose, MongoDB, Solidity, and Ganache CLI (TestRPC).
Instructions - Setup instructions (for macOS) are provided in the Quick Start Guide shown below.
Usage Capabilities - Use cURL to simulate a HTTP POST request to a Peerism API endpoint (instead of sending a request from the Peerism React Native ÐApp https://github.com/peerism/peer.ai). Alternatively allows triggering Middleware functions individually. API routes use an Express.js Middleware Chain that allow a request to compile the Peerism Smart Contract using Solidity Compiler (Solc) and Ether Pudding, then deploy it to the Ethereum TestRPC test network blockchain and responds with the contract address.

Terminal Tab #1 - Install dependencies including Ganache CLI (TestRPC from the Truffle Suite)
```
nvm install v9.3.0;
nvm use;
nvm use v9.3.0;
yarn install;
npm install -g ganache-cli
```
Terminal Tab #1 - Run MongoDB Server in a separate Terminal tab
```
mongod
```
Terminal Tab #2 - Run Ethereum Client using Ganache CLI (TestRPC).

rm -rf ./db;
mkdir -p db/chaindb;
ganache-cli --account '0x0000000000000000000000000000000000000000000000000000000000000001, 10002471238800000000000' \
  --account '0x0000000000000000000000000000000000000000000000000000000000000002, 10004471238800000000000' \
  --unlock '0x0000000000000000000000000000000000000000000000000000000000000001' \
  --unlock '0x0000000000000000000000000000000000000000000000000000000000000002' \
  --unlock '0x7e5f4552091a69125d5dfcb7b8c2659029395bdf' \
  --unlock '0x2b5ad5c4795c026514f8317c7a215e218dccd6cf' \
  --blocktime 0 \
  --deterministic true \
  --port 8545 \
  --hostname localhost \
  --gasPrice 20000000000 \
  --gasLimit 0x8000000 \
  --debug true \
  --mem true \
  --networkId 1337 \
  --db './db/chaindb'

Terminal Tab #3 - Compile and Deploy Smart Contracts to TestRPC blockchain
- Compile Smart Contracts
  - Option 1: Generates build/contracts/Peerism.sol.js
```
node lib/compileContract.js Peerism
```
  - Option 2: Genertes build/contracts/Peerism.json (DEPRECATED)
```
truffle compile --compile-all;
```
- Deploy Smart Contracts
  - Option 1: Deploy without Truffle
    - Modify Bitcore dependency before running the next command to avoid error Error: More than one instance of bitcore-lib found. Please make sure to require bitcore-lib and check that submodules do not also include their own bitcore-lib dependency., as described here: bitpay/bitcore#1454, by opening node_modules/bitcore-mnemonic/node_modules/bitcore-lib/index.js and commented out the following lines of code to avoid an error.
      bitcore.versionGuard = function(version) { // if (version !== undefined) { // var message = 'More than one instance of bitcore-lib found. ' + // 'Please make sure to require bitcore-lib and check that submodules do' + // ' not also include their own bitcore-lib dependency.'; // throw new Error(message); // } };
```
node lib/deployContract.js Peerism
```
  - Option 2: Deploy with Truffle (DEPRECATED)
```
truffle migrate --reset --network development;
```
  - Note: Watch the deployment transactions being send to the blockchain in Terminal Tab #2
Terminal Tab #3 - Run Tests
```
truffle test;
```
Terminal Tab #4 - Drop the server. Run server, then try cURL requests
```
yarn run drop; yarn run dev;
```

Terminal Tab #4 - Send request to server and receive response for authentication and authorisation to access specific API endpoints.

cURL

Register with email/password. JWT provided in response (i.e. {"token":"xyz"})

curl -v -X POST http://localhost:7000/users/auth/register -d "[email protected]&password=123456&name=Luke" -H "Content-Type: application/x-www-form-urlencoded"
curl -v -X POST http://localhost:7000/users/auth/register -d '{"email":"[email protected]", "password":"123456", "name":"Gavin"}' -H "Content-Type: application/json"

Sign in with email/password. JWT provided in response (i.e. {"token":"xyz"})

curl -v -X POST http://localhost:7000/users/auth -d "[email protected]&password=123456" -H "Content-Type: application/x-www-form-urlencoded"
curl -v -X POST http://localhost:7000/users/auth -d '{"email":"[email protected]", "password":"123456"}' -H "Content-Type: application/json"

Access a restricted endpoint by providing JWT

curl -v -X GET http://localhost:7000/users -H "Content-Type: application/json" -H "Authorization: Bearer <INSERT_TOKEN>"

Create user by providing JWT

curl -v -X POST http://localhost:7000/users/create --data '[{"email":"[email protected]", "name":"Test"}]' -H "Content-Type: application/json" -H "Authorization: JWT <INSERT_TOKEN>"
curl -v -X POST http://localhost:7000/users/create -d "[email protected]&name=Test2" -H "Content-Type: application/x-www-form-urlencoded" -H "Authorization: JWT <INSERT_TOKEN>"

Terminal Tab #4 - Send request to server with Smart Contract Name to be Compiled and Deployed to the Ethereum TestRPC and receive response with the Contract Address.
- cURL
```
curl -v -X POST http://localhost:7000/contracts/generate -d '{"contractName":"Peerism"}' -H "Content-Type: application/json"
```
Terminal Tab #4 - Experiment in REPL
- Use Truffle Console
  - Run Truffle Console
```
truffle console --network development;
```
  - Run commands
```
web3
web3.currentProvider
web3.eth.getBalance('0x7e5f4552091a69125d5dfcb7b8c2659029395bdf')
```
- Attach to EthereumJS TestRPC using Go Ethereum (Geth)
  - Install Geth
  - Start Geth JavaScript console
```
geth attach rpc:http://localhost:8545
```
  - Run commands
```
web3
web3.currentProvider
web3.eth.getBalance('0x7e5f4552091a69125d5dfcb7b8c2659029395bdf')
eth.accounts
```
- Optional: Try to perform RPC calls to Ganache TestRPC using cURL. trufflesuite/ganache#383
Terminal Tab #5 - Run Tests on port 7111
```
yarn run drop; yarn run test-watch
```
Terminal Tab #1 - Drop the database. Seed the database
```
yarn run drop;
yarn run seed;
```

Log

Initial setup
```
git init; touch README.md; touch .gitignore;
code .;
```
- Add boilerplate contents to .gitignore for Node.js

Setup API

yarn init -y; 
yarn add express body-parser;
yarn add nodemon --dev;
touch server.js;

Add boilerplate contents to server.js
Add "dev" in "scripts" section of package.json

Add Mongoose

yarn add mongoose;
mkdir models; touch models/init.js;
touch models/User.js;
touch models/seeds.js;
touch models/drop.js

Create Models for Mongoose
Add boilerplate contents to models
Add scripts to package.json
Run MongoDB Server
```
mongod
```

MongoDB Client

mongo

show dbs
use peerai
show collections
db.users.find({})
db.skills.find({})

Create routes
```
mkdir routes
```
Modify server.js. Add routes/users.js
Add authentication with Passport, Passport-Local, and Passport-Local-Mongoose:
```
yarn add passport passport-local passport-local-mongoose
```
Rename Person and people to User and users
Add User Registration route
Add User Sign in route
Add JWT library to return a token instead of a user
```
yarn add jsonwebtoken;
```
Add Passport JWT library
```
yarn add passport-jwt
```
Add restricted endpoint that requires valid JWT to access
Add Controllers https://developer.mozilla.org/en-US/docs/Learn/Server-side/Express_Nodejs/routes

Add Route Tests

yarn add mocha chai chai-http --dev;
mkdir -p test/routes;
touch test/routes/users_test.js;

Add Model Tests

mkdir test/models;
touch test/models/users_test.js

Add Dotenv library to use different database in development and testing

yarn add lodash;
yarn add dotenv --dev;
touch .sample-env;
echo 'NODE_ENV=development' >> ./.sample-env;

Add Ethereum dependencies including TestRPC
```
yarn add [email protected] [email protected] [email protected] [email protected];
yarn add ethereumjs-testrpc --dev;
yarn add solc ether-pudding --dev;
yarn add truffle-artifactor --dev;
```
- References
  - https://medium.com/@codetractio/try-out-ethereum-using-only-nodejs-and-npm-eabaaaf97c80
  - Smart Contracts without Truffle - https://medium.com/@doart3/ethereum-dapps-without-truffle-compile-deploy-use-it-e6daeefcf919
  - EthereumJS Util - Library for cryptographic hashes for Ethereum addresses - https://github.com/ethereumjs/ethereumjs-util
  - EthereumJS Tx - library to create, edit, and sign Ethereum transactions - https://github.com/ethereumjs/ethereumjs-tx
  - EthereumJS LightWallet - https://github.com/ConsenSys/eth-lightwallet
  - Solc - Compile Solidity Contract - https://www.npmjs.com/package/solc
  - Ether Pudding - Manage Solidity Contracts and Packages - https://www.npmjs.com/package/ether-pudding
  - Truffle Artifactor - replaces Ether Pudding - https://github.com/trufflesuite/truffle-artifactor
  - Reading from JSON files - https://www.codementor.io/codementorteam/how-to-use-json-files-in-node-js-85hndqt32
Problem: Tried to manually compile using Solc with node lib/compileContract.js ConvertLib, which generates ConvertLib.solc.js in build/contracts. However it does not compile MetaCoin.sol, as it returns error 1:27: ParserError: Source "ConvertLib.sol" not found: File not supplied initially.\n ... import "./ConvertLib.sol".
- Solution: Use Truffle to compile Solidity contracts with truffle compile --compile-all

Run shell script in new Terminal tab (copy from https://github.com/ltfschoen/solidity_test/blob/master/testrpc.sh)

rm -rf ./db;
mkdir db && mkdir db/chaindb;
cd ~/code/blockchain/solidity_test; testrpc --account '0x0000000000000000000000000000000000000000000000000000000000000001, 10002471238800000000000' \
  --account '0x0000000000000000000000000000000000000000000000000000000000000002, 10004471238800000000000' \
  --account '0x0000000000000000000000000000000000000000000000000000000000000003, 10004471238800000000000' \
  --account '0x0000000000000000000000000000000000000000000000000000000000000004, 10004471238800000000000' \
  --account '0x0000000000000000000000000000000000000000000000000000000000000005, 10004471238800000000000' \
  --account '0x0000000000000000000000000000000000000000000000000000000000000006, 10004471238800000000000' \
  --account '0x0000000000000000000000000000000000000000000000000000000000000007, 10004471238800000000000' \
  --unlock '0x0000000000000000000000000000000000000000000000000000000000000001' \
  --unlock '0x0000000000000000000000000000000000000000000000000000000000000002' \
  --unlock '0x0000000000000000000000000000000000000000000000000000000000000003' \
  --unlock '0x0000000000000000000000000000000000000000000000000000000000000004' \
  --unlock '0x0000000000000000000000000000000000000000000000000000000000000005' \
  --unlock '0x0000000000000000000000000000000000000000000000000000000000000006' \
  --unlock '0x0000000000000000000000000000000000000000000000000000000000000007' \
  --unlock '0x7e5f4552091a69125d5dfcb7b8c2659029395bdf' \
  --unlock '0x2b5ad5c4795c026514f8317c7a215e218dccd6cf' \
  --blocktime 0 \
  --deterministic true \
  --port 8545 \
  --hostname localhost \
  --gasPrice 20000000000 \
  --gasLimit 1000000 \
  --debug true \
  --mem true \
  --db './db/chaindb'

Install Truffle
```
npm install -g truffle;
truffle init;
```
Run Truffle Unbox in separate directory to get template Metacoin example and move relevant boilerplate contracts and tests into the the root folder
Update package.json tests script to run tests for Smart Contracts and API tests:
```
"test": "truffle test; NODE_ENV=testing mocha --recursive test/**/*_test.js",
```

Remove truffle-config.js and add the following to truffle.js:

module.exports = {
  // http://truffleframework.com/docs/advanced/configuration
  networks: {
    development: {
      host: "localhost",
      port: 8545,
      network_id: "*" // Match any network id
    }
  }
};

Add ethpm.json for EthPM Package Management

{
  "package_name": "truffle-box-peerism-api-node-express",
  "version": "0.0.1",
  "description": "Truffle Box of Peerism API built with Truffle, Node.js, Express.js,
Solidity, Ether Pudding, and Ethereum TestRPC",
  "authors": [
    "Luke Schoen <[email protected]>"
  ],
  "keywords": [
    "ethereum",
    "express.js",
    "node.js",
    "middleware",
    "api"
  ],
  "license": "MIT"
}

References:
- http://truffleframework.com/docs/getting_started/packages-ethpm

Open node_modules/bitcore-mnemonic/node_modules/bitcore-lib/index.js and commented out the following lines of code to avoid an error.

bitcore.versionGuard = function(version) {
  // if (version !== undefined) {
  //   var message = 'More than one instance of bitcore-lib found. ' +
  //     'Please make sure to require bitcore-lib and check that submodules do' +
  //     ' not also include their own bitcore-lib dependency.';
  //   throw new Error(message);
  // }
};

Run Truffle Console experimentation
```
truffle console --network development;
```
Build script for Smart Contract (generates .sol.js file in build/contracts/)
```
mkdir lib;
node lib/compileContract.js Peerism
```
- Alternatively compile with Truffle
Deployment script for Smart Contract
- Reference: https://medium.com/@codetractio/try-out-ethereum-using-only-nodejs-and-npm-eabaaaf97c80
```
touch lib/deployContract.js;
node lib/deployContract.js Peerism;
```
- References:
  - http://truffleframework.com/docs/getting_started/contracts
  - Gas Limits - https://bitcoin.stackexchange.com/questions/39132/what-is-gas-limit-in-ethereum

FAQ

How to understand how to use Passport JWT library?

Refer to the library codebase on Github or in node_modules/jsonwebtoken/ i.e. verify.js
Use breakpoints

Experiment using Node. i.e. Run node then

npm install jsonwebtoken

const JWT = require('jsonwebtoken');
JWT.decode("eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6Imx0ZnNjaG9lbkBnbWFpbC5jb20iLCJpYXQiOjE1MTMwNjY3NTEsImV4cCI6MTUxMzY3MTU1MSwic3ViIjoiNWEyZjkwZmZiNTI5YjI0YzM5MTA1NWM3In0.MkcCR1YD2c21x_WOQObyY-UPAQDWTcooOiO69saUVMI")

References

TODO

Integrate with Peerism React Native app
Integrate Solidity smart contract using TestRPC
Create a Truffle Box
- trufflesuite/truffle#433
- http://truffleframework.com/boxes/
Upgrade to latest Web3 1.0.0 Beta-27 that has been successfully used in https://github.com/ltfschoen/geth-node to deploy a FixedSupplyToken.sol smart contract to a Private Network with Geth

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Name		Name	Last commit message	Last commit date
Latest commit History 27 Commits
config		config
contracts		contracts
controllers		controllers
lib		lib
middleware		middleware
migrations		migrations
models		models
routes		routes
test		test
.gitignore		.gitignore
.nvmrc		.nvmrc
.sample-env		.sample-env
LICENSE		LICENSE
README.md		README.md
app.js		app.js
box-img-lg.png		box-img-lg.png
box-img-sm.png		box-img-sm.png
ethpm.json		ethpm.json
package-lock.json		package-lock.json
package.json		package.json
server.js		server.js
truffle-box.json		truffle-box.json
truffle.js		truffle.js
yarn.lock		yarn.lock

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