CMC specific endpoints (#603)

* - Added 2 new endpoints to return plain network currency supplies

* Use const mainnet mosaic id

* Linting

* another lint fix

* instead of trimming the fraction, add the dot

* Added parameter to currency circulating endpoint

* Changed to load from network properties

rest/src/plugins/mosaic/mosaicRoutes.js

@@ -22,6 +22,9 @@
 const merkleUtils = require('../../routes/merkleUtils');
 const routeUtils = require('../../routes/routeUtils');
 const catapult = require('catapult-sdk');
+const ini = require('ini');
+const fs = require('fs');
+const util = require('util');
 
 const { PacketType } = catapult.packet;
 
@@ -60,5 +63,25 @@ module.exports = {
 				next();
 			});
 		});
+
+		// CMC specific endpoint
+		const readAndParseNetworkPropertiesFile = () => {
+			const readFile = util.promisify(fs.readFile);
+			return readFile(services.config.apiNode.networkPropertyFilePath, 'utf8')
+				.then(fileData => ini.parse(fileData));
+		};
+
+		server.get('/network/currency/circulating', (req, res, next) => readAndParseNetworkPropertiesFile()
+			.then(propertiesObject => {
+				const currencyId = propertiesObject.chain.currencyMosaicId.replace(/'/g, '').replace('0x', '');
+				const mosaicId = routeUtils.parseArgument({ mosaicId: currencyId }, 'mosaicId', 'uint64hex');
+				return db.mosaicsByIds([mosaicId]).then(response => {
+					const s = response[0].mosaic.supply.toString();
+					const supply = `${s.substring(0, s.length - 6)}.${s.substring(s.length - 6, s.length)}`;
+					res.setHeader('content-type', 'text/plain');
+					res.send(supply);
+					next();
+				});
+			}));
 	}
 };

rest/src/routes/networkRoutes.js

@@ -129,5 +129,17 @@ module.exports = {
 				next();
 			});
 		});
+
+		// CMC specific, only return the plain value of the max mosaic supply
+		server.get('/network/currency/total', (req, res, next) => readAndParseNetworkPropertiesFile()
+			.then(propertiesObject => {
+				const maxSupply = propertiesObject.chain.maxMosaicAtomicUnits.replace(/'/g, '').slice(0, -6);
+				res.setHeader('content-type', 'text/plain');
+				res.send(maxSupply);
+				next();
+			}).catch(() => {
+				res.send(errors.createInvalidArgumentError('there was an error reading the network properties file'));
+				next();
+			}));
 	}
 };

rest/test/plugins/mosaic/mosaic_spec.js

@@ -42,7 +42,8 @@ describe('mosaic plugin', () => {
 			test.assert.assertRoutes(routes, [
 				'/mosaics',
 				'/mosaics/:mosaicId',
-				'/mosaics/:mosaicId/merkle'
+				'/mosaics/:mosaicId/merkle',
+				'/network/currency/circulating'
 			]);
 		});
 

rest/test/routes/allRoutes_spec.js

@@ -69,7 +69,9 @@ describe('all routes', () => {
 
 			'/transactions/:group/:transactionId',
 			'/transactions/:group',
-			'/transactionStatus/:hash'
+			'/transactionStatus/:hash',
+
+			'/network/currency/total'
 		]);
 	});