Update/remove Electrum servers and update some currency data (#588)

- Remove a dead LTC Electrum server. jl777/coins@96bc16a
- Remove BCBC currency. Its Electrum servers are down. jl777/coins@ecc60d9
- Update QTUM Electrum servers. jl777/coins@acf8201
- Update BCH Electrum servers. jl777/coins@12726b0

`txversion:4`:
- jl777/coins@7ce1948
- jl777/coins@84e79d1
- jl777/coins@6e70bcd

app/marketmaker/supported-currencies.js

@@ -94,25 +94,6 @@ const supportedCurrencies = [
 		etomic: '0xFf3519eeeEA3e76F1F699CCcE5E23ee0bdDa41aC',
 		rpcport: 80,
 	},
-	{
-		coin: 'BCBC',
-		name: 'Bitcoin@CBC',
-		rpcport: 8340,
-		pubtype: 0,
-		p2shtype: 5,
-		wiftype: 128,
-		txfee: 10000,
-		electrumServers: [
-			{
-				host: 'bsmn0.cleanblockchain.io',
-				port: 50001,
-			},
-			{
-				host: 'bsmn1.cleanblockchain.org',
-				port: 50001,
-			},
-		],
-	},
 	{
 		coin: 'BCH',
 		rpcport: 33333,
@@ -130,9 +111,13 @@ const supportedCurrencies = [
 				port: 50001,
 			},
 			{
-				host: 'wallet.satoshiscoffeehouse.com',
+				host: 'electrum.imaginary.cash',
 				port: 50001,
 			},
+			{
+				host: 'abc1.hsmiths.com',
+				port: 60001,
+			},
 		],
 	},
 	{
@@ -445,6 +430,7 @@ const supportedCurrencies = [
 		name: 'CoinCollect',
 		asset: 'CCL',
 		rpcport: 20849,
+		txversion: 4,
 		electrumServers: [
 			{
 				host: 'electrum1.cipig.net',
@@ -1257,8 +1243,8 @@ const supportedCurrencies = [
 				port: 50001,
 			},
 			{
-				host: 'electrum-ltc.ddns.net',
-				port: 50001,
+				host: 'ltc01.knas.systems',
+				port: 50003,
 			},
 			{
 				host: 'electrum-ltc.wilv.in',
@@ -1707,19 +1693,19 @@ const supportedCurrencies = [
 		txfee: 400000,
 		electrumServers: [
 			{
-				host: 's1.qtum.info',
+				host: 's4.qtum.info',
 				port: 50001,
 			},
 			{
-				host: 's2.qtum.info',
+				host: 's5.qtum.info',
 				port: 50001,
 			},
 			{
-				host: 's3.qtum.info',
+				host: 's7.qtum.info',
 				port: 50001,
 			},
 			{
-				host: 's4.qtum.info',
+				host: 's8.qtum.info',
 				port: 50001,
 			},
 		],
@@ -2066,6 +2052,7 @@ const supportedCurrencies = [
 		name: 'VerusCoin',
 		asset: 'VRSC',
 		rpcport: 27486,
+		txversion: 4,
 		electrumServers: [
 			{
 				host: 'el0.vrsc.0x03.services',
@@ -2254,7 +2241,7 @@ const supportedCurrencies = [
 		pubtype: 184,
 		p2shtype: 189,
 		wiftype: 128,
-		txversion: 3,
+		txversion: 4,
 		txfee: 10000,
 		electrumServers: [
 			{

app/portfolio-util.js

@@ -26,6 +26,12 @@ class IncorrectPasswordError extends Error {
 	}
 }
 
+// Currencies that are removed from the app and should be removed from the user's portfolio
+const removedCurrencies = [
+	'DNR',
+	'BCBC',
+];
+
 const createPortfolio = async ({name, seedPhrase, password}) => {
 	const id = generateId(name);
 	const filePath = idToFilePath(id);
@@ -83,10 +89,9 @@ const migrateEnabledCurrencies = async id => {
 	});
 };
 
-// TODO: Remove this sometime far in the future when everyone has migrated
-const removeDnrCurrency = async id => {
+const removeCurrenciesMigration = async id => {
 	await modifyPortfolio(id, portfolio => {
-		portfolio.currencies = portfolio.currencies.filter(currency => currency !== 'DNR');
+		portfolio.currencies = portfolio.currencies.filter(currency => !removedCurrencies.includes(currency));
 	});
 };
 
@@ -112,7 +117,7 @@ const getPortfolios = async () => {
 		// TODO: Remove this sometime far in the future when everyone has migrated
 		await migrateEnabledCurrencies(portfolio.id);
 
-		await removeDnrCurrency(portfolio.id);
+		await removeCurrenciesMigration(portfolio.id);
 
 		return portfolio;
 	}));

app/renderer/block-explorer.js

@@ -11,7 +11,6 @@ const explorers = new Map(Object.entries({
 	AXE: 'http://207.246.65.114:3001/tx/{txid}',
 	AXO: 'https://axo.kmdexplorer.io/tx/{txid}',
 	BAY: 'https://chainz.cryptoid.info/bay/tx.dws?{txid}',
-	BCBC: 'http://be.cleanblockchain.org/tx/{txid}',
 	BCH: 'https://blockchair.com/bitcoin-cash/transaction/{txid}',
 	BCO: 'https://explorer.bridgecoin.org/tx/{txid}',
 	BDL: 'https://explorer.bitdeal.co.in/tx/{txid}',