设备和平台模拟

simulations/platform.js

@@ -0,0 +1,49 @@
+const express = require('express');
+const app = express();
+const Web3 = require('web3');
+const { hashPersonalMessage, addHexPrefix, sha3 } = require('ethereumjs-util');
+
+const hashMessageHex = message => addHexPrefix(hashPersonalMessage(Buffer.from(message)).toString('hex'));
+
+app.use(express.json());
+
+const DeviceManagerArtifact = require('../build/contracts/DeviceManager.json');
+let latestNetwork = DeviceManagerArtifact.networks[Object.keys(DeviceManagerArtifact.networks).reduce((res, curr) => curr > res ? curr : res)];
+
+// Connect to local node
+const web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
+web3.eth.defaultAccount = web3.eth.accounts[0];
+
+// Instance using ABI and contract address
+const deviceManager = web3.eth.contract(DeviceManagerArtifact.abi).at(latestNetwork.address);
+
+// Receive payload and validate on blockchain
+app.post('/receive', function (req, res) {
+  console.log('received payload: ' + JSON.stringify(req.body));
+
+  // Validate message
+  const { deviceId, message, signature } = req.body;
+  let validMessage = deviceManager.isValidEthMessage(deviceId, hashMessageHex(message), signature);
+  console.log('valid message: ' + validMessage);
+
+  // Validate metadata
+  const { metadata, proof } = req.body;
+  let metadataHash = addHexPrefix(sha3(metadata).toString('hex'));
+  let validMetadata = deviceManager.isValidMetadataMember(deviceId, proof, metadataHash);
+  console.log('valid metadata: ' + validMetadata);
+
+  // Validate firmware
+  const { firmware } = req.body;
+  let firmwareHash = addHexPrefix(sha3(firmware).toString('hex'));
+  let validFirmware = deviceManager.isValidFirmwareHash(deviceId, firmwareHash);
+  console.log('valid firmware: ' + validFirmware);
+
+  // Respond back with status
+  res.send({
+    validMessage,
+    validMetadata,
+    validFirmware
+  });
+})
+
+app.listen(1337, () => console.log('Platform simulation listening on port 1337'));