(feat): working trust contract

blockchain/contracts/Trust.sol

+pragma solidity >=0.4.21 <0.6.0;
+
+import '../node_modules/ethr-did-registry/contracts/EthereumDIDRegistry.sol';
+
+contract Trust {
+
+ EthereumDIDRegistry didRegistry;
+
+ struct TrustScore {
+ address from;
+ address to;
+ int8 score;
+ }
+
+ mapping(address => mapping(address => TrustScore)) public scores;
+
+ constructor(address didRegistryAddress) public {
+ didRegistry = EthereumDIDRegistry(didRegistryAddress);
+ }
+
+ // Test function REMOVE THIS
+ function sayHello() public view returns (string) {
+ return "hello";
+ }
+
+ function issueTrustViaDelegate(address from, address to, int8 score) public returns (bool) {
+ bool validated = didRegistry.validDelegate(from, 'DID-JWT', msg.sender);
+ require(validated);
+ _issueTrust(from, to, score);
+ }
+
+ function issueTrust(address to, int8 score) {
+ require(didRegistry.identityOwner(msg.sender) == msg.sender);
+ _issueTrust(msg.sender, to, score);
+ }
+
+ /**
+ * Issue trust (internal)
+ * @param from address
+ * @param to address
+ * @param score int8
+ * @return bool
+ */
+ function _issueTrust(address from, address to, int8 score) internal returns (bool) {
+ TrustScore memory _trustScore = TrustScore(
+ from,
+ to,
+ score
+ );
+
+ scores[from][to] = _trustScore;
+
+ return true;
+ }
+
+ function getTrust(address from, address to) public view returns (int8) {
+ return scores[from][to].score;
+ }
+
+}
\ No newline at end of file

blockchain/package-lock.json

+{
+ "requires": true,
+ "lockfileVersion": 1,
+ "dependencies": {
+ "ethr-did-registry": {
+ "version": "0.0.3",
+ "resolved": "https://registry.npmjs.org/ethr-did-registry/-/ethr-did-registry-0.0.3.tgz",
+ "integrity": "sha512-4BPvMGkxAK9vTduCq6D5b8ZqjteD2cvDIPPriXP6nnmPhWKFSxypo+AFvyQ0omJGa0cGTR+dkdI/8jiF7U/qaw=="
+ }
+ }
+}

blockchain/test/trust.js

+const Trust = artifacts.require("Trust");
+const EthereumDIDRegistry = artifacts.require("EthereumDIDRegistry");
+
+contract("Trust", accounts => {
+ let trust;
+ let didRegistry;
+
+ beforeEach(async () => {
+ didRegistry = await EthereumDIDRegistry.new();
+ trust = await Trust.new(didRegistry.address);
+ });
+
+ it("should say hello", async () => {
+ const say = await trust.sayHello.call();
+ assert.equal(say, "hello");
+ });
+
+ it("should issue trust score", async () => {
+ await trust.issueTrust(accounts[2], 1);
+ assert.equal(await trust.getTrust(accounts[0], accounts[2]), 1);
+ });
+
+ it("should issue a negative trust score", async () => {
+ await trust.issueTrust(accounts[3], -1);
+ assert.equal(await trust.getTrust(accounts[0], accounts[3]), -1);
+ });
+
+ it("should issue multiple trust scores", async () => {
+ await trust.issueTrust(accounts[2], 1);
+ await trust.issueTrust(accounts[3], 1);
+ await trust.issueTrust(accounts[4], -1);
+ await trust.issueTrust(accounts[5], -1);
+ assert.equal(await trust.getTrust(accounts[0], accounts[2]), 1);
+ assert.equal(await trust.getTrust(accounts[0], accounts[3]), 1);
+ assert.equal(await trust.getTrust(accounts[0], accounts[4]), -1);
+ assert.equal(await trust.getTrust(accounts[0], accounts[5]), -1);
+ });
+
+ it("should issue trust score via a delegate", async () => {
+ // accounts[1] is the identity
+ // accounts[1] is also the owner
+ // accounts[2] will become the delegate
+ await didRegistry.addDelegate(
+ accounts[1],
+ web3.utils.fromAscii("DID-JWT"),
+ accounts[2],
+ 86400 * 365,
+ {
+ from: accounts[1]
+ }
+ );
+ await trust.issueTrustViaDelegate(accounts[1], accounts[3], 1, {
+ from: accounts[2]
+ });
+ assert.equal(await trust.getTrust(accounts[1], accounts[3]), 1);
+ });
+});

blockchain/truffle-config.js

@@ -47,33 +47,30 @@ module.exports = {
  // port: 8545, // Standard Ethereum port (default: none)
  // network_id: "*", // Any network (default: none)
  // },
-
  // Another network with more advanced options...
  // advanced: {
-  // port: 8777, // Custom port
-  // network_id: 1342, // Custom network
-  // gas: 8500000, // Gas sent with each transaction (default: ~6700000)
-  // gasPrice: 20000000000, // 20 gwei (in wei) (default: 100 gwei)
-  // from: <address>, // Account to send txs from (default: accounts[0])
-  // websockets: true // Enable EventEmitter interface for web3 (default: false)
+ // port: 8777, // Custom port
+ // network_id: 1342, // Custom network
+ // gas: 8500000, // Gas sent with each transaction (default: ~6700000)
+ // gasPrice: 20000000000, // 20 gwei (in wei) (default: 100 gwei)
+ // from: <address>, // Account to send txs from (default: accounts[0])
+ // websockets: true // Enable EventEmitter interface for web3 (default: false)
  // },
-
  // Useful for deploying to a public network.
  // NB: It's important to wrap the provider as a function.
  // ropsten: {
-  // provider: () => new HDWalletProvider(mnemonic, `https://ropsten.infura.io/v3/YOUR-PROJECT-ID`),
-  // network_id: 3, // Ropsten's id
-  // gas: 5500000, // Ropsten has a lower block limit than mainnet
-  // confirmations: 2, // # of confs to wait between deployments. (default: 0)
-  // timeoutBlocks: 200, // # of blocks before a deployment times out (minimum/default: 50)
-  // skipDryRun: true // Skip dry run before migrations? (default: false for public nets )
+ // provider: () => new HDWalletProvider(mnemonic, `https://ropsten.infura.io/v3/YOUR-PROJECT-ID`),
+ // network_id: 3, // Ropsten's id
+ // gas: 5500000, // Ropsten has a lower block limit than mainnet
+ // confirmations: 2, // # of confs to wait between deployments. (default: 0)
+ // timeoutBlocks: 200, // # of blocks before a deployment times out (minimum/default: 50)
+ // skipDryRun: true // Skip dry run before migrations? (default: false for public nets )
  // },
-
  // Useful for private networks
  // private: {
-  // provider: () => new HDWalletProvider(mnemonic, `https://network.io`),
-  // network_id: 2111, // This network is yours, in the cloud.
-  // production: true // Treats this network as if it was a public net. (default: false)
+ // provider: () => new HDWalletProvider(mnemonic, `https://network.io`),
+ // network_id: 2111, // This network is yours, in the cloud.
+ // production: true // Treats this network as if it was a public net. (default: false)
  // }
  },
 
@@ -85,7 +82,7 @@ module.exports = {
  // Configure your compilers
  compilers: {
  solc: {
- // version: "0.5.1",  // Fetch exact version from solc-bin (default: truffle's version)
+ version: "0.4.24" // Fetch exact version from solc-bin (default: truffle's version)
  // docker: true, // Use "0.5.1" you've installed locally with docker (default: false)
  // settings: { // See the solidity docs for advice about optimization and evmVersion
  // optimizer: {
@@ -96,4 +93,4 @@ module.exports = {
  // }
  }
  }
-}
+};