Interview Assignment

Assigment description

A. 會員身份 Smart Contract

1. 用 Solidity 寫，具備基本的會員系統功能：註冊、編輯個人資料、聲明、授權、恢復私鑰。

• 註冊
• 編輯個人資料
• 聲明
• 授權
• 恢復私鑰

2. 加分項：

• 付款
• 好友功能
• Deploy 到 Ethereum 的測試鏈
• Smart Contract 安全稽核
• API server
• 效能評估

B. 文章閱讀

1. Hyperledger indy-node

• 內容大意
• 讀後心得

2. OriginTrail-White-Paper

• 內容大意
• 讀後心得

會員身份 Smart Contract

Ropsten testnet (id: 3)

Contract	Address
IdentityManager	0xdd90eed19e4ea80be2bc9faef6ccbe501aac876b
TxRelay	0xa6aaa977c4a4b4d559d7be2c748a865633943224
MetaIdentityManager	0xb2c2de415b1653d66231ec5876ae43b7094921bb
ProfileManager	0x639f3b90c65bcd79659fdd4f149e565a4d056b75
ClaimManager	0x6e0e2863322a9977604db4634bd5fa10b599405f

How to run this project

1. Install npm packages

npm install

2. Run test on local ganache(testRPC)

truffle test --network local

3. Deply to testnet

truffle migrate --network ropsten

Contract interaction

All the contracts has deployed on ropsten network. And verify code on etherscan. You can interact with contract through it.

1. Registration

   Call registerIdentity to MetaIdentityManager contract with owner and recoveryKey address parameters.

   example tx: 0x4137f941e143b00712ac33097cf095bdf55f3ebdcb6b5c0f3e27f5809c74f84c example identity: 0xcf430b62fb096c0fadcfebe827a13b26d8056569

2. Edit profile

   Call setName to ProfileManager contract with identity address and specific name parameters.

   example tx: 0xe277cedc3712034e35ee33f1a5a4b5c324070df06069ebfa1fbbef6eba92f532

3. Make a claim

   Call addClaim to ClaimManager contract with identity address, claimType, scheme, signature, data and uri parameters.

   example tx: 0xdb7528e42496542401810e7dcd785db2b4d7e86dea2d59981f5dc8fbb16eb086

4. Payment, transfer ETH between identity

   Call forwardTo to MetaIdentityManager contract with sender, identity, destination, value and data parameters.

   example tx: 0xe21ac2544c6eaf4178a3bd2af5c4e62d86589d833acb3c18d6617198c75255ae

Note: Authorization and private key recovery will be update later.

Reference projects

1. uport-identity

2. origin-playground

3. ENS

Troubleshooting

1. Error: More than one instance of bitcore-lib found when running truffle test.

   Because of package dependency issue. The easiest way is hardcode the package in node modules. Edit file in ./node_modules/bitcore-lib/index.js

   bitcore.versionGuard = function (version) {return;}
   

   Return the function directly.

   reference: bitpay/bitcore#1454