examples: fix a few examples.

examples/chain.js

@@ -6,7 +6,7 @@ const chain = new Chain({
   network: 'testnet'
 });
 
-async function main() {
+(async () => {
   let entry;
 
   await chain.open();
@@ -14,6 +14,4 @@ async function main() {
   entry = await chain.getEntry(0);
 
   console.log(entry);
-}
-
-main();
+})();

examples/client.js

@@ -23,44 +23,6 @@ wallet = new HTTP.Wallet({
   apiKey: 'foo'
 });
 
-async function main() {
-  let wdb = node.require('walletdb');
-  let w, acct, hash, balance, tx;
-
-  await node.open();
-
-  w = await wallet.create({ id: 'test' });
-
-  console.log('Wallet:');
-  console.log(w);
-
-  // Fund default account.
-  await fundWallet(wdb, w.account.receiveAddress);
-
-  balance = await wallet.getBalance();
-
-  console.log('Balance:');
-  console.log(balance);
-
-  acct = await wallet.createAccount('foo');
-
-  console.log('Account:');
-  console.log(acct);
-
-  // Send to our new account.
-  hash = await sendTX(acct.receiveAddress, 10000);
-
-  console.log('Sent TX:');
-  console.log(hash);
-
-  tx = await wallet.getTX(hash);
-
-  console.log('Sent TX details:');
-  console.log(tx);
-
-  await callNodeApi();
-}
-
 async function fundWallet(wdb, addr) {
   let tx;
 
@@ -121,4 +83,40 @@ async function callNodeApi() {
   console.log(json);
 }
 
-main();
+(async () => {
+  let wdb = node.require('walletdb');
+  let w, acct, hash, balance, tx;
+
+  await node.open();
+
+  w = await wallet.create({ id: 'test' });
+
+  console.log('Wallet:');
+  console.log(w);
+
+  // Fund default account.
+  await fundWallet(wdb, w.account.receiveAddress);
+
+  balance = await wallet.getBalance();
+
+  console.log('Balance:');
+  console.log(balance);
+
+  acct = await wallet.createAccount('foo');
+
+  console.log('Account:');
+  console.log(acct);
+
+  // Send to our new account.
+  hash = await sendTX(acct.receiveAddress, 10000);
+
+  console.log('Sent TX:');
+  console.log(hash);
+
+  tx = await wallet.getTX(hash);
+
+  console.log('Sent TX details:');
+  console.log(tx);
+
+  await callNodeApi();
+})();

examples/miner.js

@@ -23,7 +23,7 @@ const miner = new Miner({
   workers: workers
 });
 
-async function main() {
+(async () => {
   let tmpl, job, block;
 
   await miner.open();
@@ -44,6 +44,4 @@ async function main() {
 
   console.log('New tip:');
   console.log(chain.tip);
-}
-
-main();
+})();

examples/node.js

@@ -4,12 +4,12 @@ const FullNode = require('bcoin/lib/node/fullnode');
 
 const node = new FullNode({
   network: 'testnet',
-  db: 'memory'
+  db: 'memory',
+  workers: true
 });
 
-async function main() {
+(async () => {
   await node.open();
-
   await node.connect();
 
   node.on('connect', (entry, block) => {
@@ -21,6 +21,4 @@ async function main() {
   });
 
   node.startSync();
-}
-
-main();
+})();

examples/plugin.js

@@ -28,12 +28,13 @@ MyPlugin.prototype.sayPeers = function sayPeers() {
 
 const node = new FullNode({
   network: 'testnet',
-  db: 'memory'
+  db: 'memory',
+  workers: true
 });
 
 node.use(MyPlugin);
 
-async function main() {
+(async () => {
   let plugin = node.require('my-plugin');
 
   await node.open();
@@ -49,6 +50,6 @@ async function main() {
   node.on('tx', (tx) => {
     console.log('%s added to mempool.', tx.txid());
   });
-}
 
-main();
+  node.startSync();
+})();

examples/tx.js

@@ -3,56 +3,58 @@
 const bcoin = require('bcoin');
 const assert = require('assert');
 
-let master = bcoin.hd.generate();
-let key = master.derive('m/44/0/0/0/0');
-let keyring = new bcoin.keyring(key.privateKey);
-let cb = new bcoin.mtx();
+(async () => {
+  let master = bcoin.hd.generate();
+  let key = master.derivePath('m/44/0/0/0/0');
+  let keyring = new bcoin.keyring(key.privateKey);
+  let cb = new bcoin.mtx();
 
-cb.addInput({
-  prevout: new bcoin.outpoint(),
-  script: new bcoin.script(),
-  sequence: 0xffffffff
-});
+  cb.addInput({
+    prevout: new bcoin.outpoint(),
+    script: new bcoin.script(),
+    sequence: 0xffffffff
+  });
 
-// Send 50,000 satoshis to ourselves.
-cb.addOutput({
-  address: keyring.getAddress(),
-  value: 50000
-});
+  // Send 50,000 satoshis to ourselves.
+  cb.addOutput({
+    address: keyring.getAddress(),
+    value: 50000
+  });
 
-// Our available coins.
-let coins = [];
+  // Our available coins.
+  let coins = [];
 
-// Convert the coinbase output to a Coin
-// object and add it to our available coins.
-// In reality you might get these coins from a wallet.
-let coin = bcoin.coin.fromTX(cb, 0, -1);
-coins.push(coin);
+  // Convert the coinbase output to a Coin
+  // object and add it to our available coins.
+  // In reality you might get these coins from a wallet.
+  let coin = bcoin.coin.fromTX(cb, 0, -1);
+  coins.push(coin);
 
-// Create our redeeming transaction.
-let mtx = new bcoin.mtx();
+  // Create our redeeming transaction.
+  let mtx = new bcoin.mtx();
 
-// Send 10,000 satoshis to ourself.
-mtx.addOutput({
-  address: keyring.getAddress(),
-  value: 10000
-});
+  // Send 10,000 satoshis to ourself.
+  mtx.addOutput({
+    address: keyring.getAddress(),
+    value: 10000
+  });
 
-// Now that we've created the output, we can do some coin selection (the output
-// must be added first so we know how much money is needed and also so we can
-// accurately estimate the size for fee calculation).
+  // Now that we've created the output, we can do some coin selection (the output
+  // must be added first so we know how much money is needed and also so we can
+  // accurately estimate the size for fee calculation).
+
+  // Select coins from our array and add inputs.
+  // Calculate fee and add a change output.
+  await mtx.fund(coins, {
+    // Use a rate of 10,000 satoshis per kb.
+    // With the `fullnode` object, you can
+    // use the fee estimator for this instead
+    // of blindly guessing.
+    rate: 10000,
+    // Send the change back to ourselves.
+    changeAddress: keyring.getAddress()
+  });
 
-// Select coins from our array and add inputs.
-// Calculate fee and add a change output.
-mtx.fund(coins, {
-  // Use a rate of 10,000 satoshis per kb.
-  // With the `fullnode` object, you can
-  // use the fee estimator for this instead
-  // of blindly guessing.
-  rate: 10000,
-  // Send the change back to ourselves.
-  changeAddress: keyring.getAddress()
-}).then(() => {
   // Sign input 0
   mtx.sign(keyring);
 
@@ -69,4 +71,7 @@ mtx.fund(coins, {
   assert(tx.verify(mtx.view));
 
   console.log(mtx);
+})().catch((err) => {
+  console.error(err.stack);
+  process.exit(1);
 });

examples/wallet.js

@@ -4,19 +4,18 @@ const random = require('bcoin/lib/crypto/random');
 const WalletDB = require('bcoin/lib/wallet/walletdb');
 const MTX = require('bcoin/lib/primitives/mtx');
 const Outpoint = require('bcoin/lib/primitives/outpoint');
-let walletdb;
 
 function dummy() {
   let hash = random.randomBytes(32).toString('hex');
   return new Outpoint(hash, 0);
 }
 
-walletdb = new WalletDB({
+const walletdb = new WalletDB({
   network: 'testnet',
   db: 'memory'
 });
 
-async function main() {
+(async () => {
   let wallet, acct, mtx, tx, wtx;
 
   await walletdb.open();
@@ -44,6 +43,4 @@ async function main() {
 
   console.log('Added transaction');
   console.log(wtx);
-}
-
-main();
+})();