readme: examples.

README.md

@@ -114,30 +114,19 @@ var miner = new bcoin.miner({ chain: chain, mempool: mempool });
 
 // Open the miner (initialize the databases, etc).
 // Miner will implicitly call `open` on chain and mempool.
-miner.open(function(err) {
+miner.open().then(function() {
-  if (err)
-    throw err;
-
   // Create a block "attempt".
-  miner.createBlock(function(err, attempt) {
+  return miner.createBlock();
-    if (err)
+}).then(function(attempt) {
-      throw err;
-
   // Mine the block on the worker pool (use mine() for the master process)
-    attempt.mineAsync(function(err, block) {
+  return attempt.mineAsync();
-      if (err)
+}).then(function(block) {
-        throw err;
-
   // Add the block to the chain
-      chain.add(block, function(err) {
+  console.log('Adding %s to the blockchain.', block.rhash);
-        if (err)
-          throw err;
-
-        console.log('Added %s to the blockchain.', block.rhash);
   console.log(block);
-      });
+  return chain.add(block);
-    });
+}).then(function() {
-  });
+  console.log('Added block!');
 });
 ```
 
@@ -157,10 +146,7 @@ var mempool = new bcoin.mempool({ chain: chain });
 var pool = new bcoin.pool({ chain: chain, mempool: mempool, maxPeers: 8 });
 
 // Open the pool (implicitly opens mempool and chain).
-pool.open(function(err) {
+pool.open().then(function() {
-  if (err)
-    throw err;
-
   // Connect, start retrieving and relaying txs
   pool.connect();
 
@@ -204,10 +190,7 @@ var tpool = new bcoin.pool({
   size: 8
 });
 
-tpool.open(function(err) {
+tpool.open().then(function() {
-  if (err)
-    throw err;
-
   // Connect, start retrieving and relaying txs
   tpool.connect();
 
@@ -252,18 +235,11 @@ var pool = new bcoin.pool({
 
 var walletdb = new bcoin.walletdb({ db: 'memory' });
 
-pool.open(function(err) {
+pool.open().then(function() {
-  if (err)
+  return walletdb.open();
-    throw err;
+}).then(function() {
-
+  return walletdb.create();
-  walletdb.open(function(err) {
+}).then(function(wallet) {
-    if (err)
-      throw err;
-
-    walletdb.create(function(err, wallet) {
-      if (err)
-        throw err;
-
   console.log('Created wallet with address %s', wallet.getAddress('base58'));
 
   // Add our address to the spv filter.
@@ -283,8 +259,6 @@ pool.open(function(err) {
     console.log('Balance updated.');
     console.log(bcoin.utils.btc(balance.unconfirmed));
   });
-    });
-  });
 });
 ```
 
@@ -310,10 +284,7 @@ node.on('error', function(err) {
 });
 
 // Start the node
-node.open(function(err) {
+node.open().then(function() {
-  if (err)
-    throw err;
-
   // Create a new wallet (or get an existing one with the same ID)
   var options = {
     id: 'mywallet',
@@ -322,10 +293,8 @@ node.open(function(err) {
     type: 'pubkeyhash'
   };
 
-  node.walletdb.create(options, function(err, wallet) {
+  return node.walletdb.create(options);
-    if (err)
+}).then(function(wallet) {
-      throw err;
-
   console.log('Created wallet with address: %s', wallet.getAddress('base58'));
 
   // Start syncing the blockchain
@@ -342,30 +311,17 @@ node.open(function(err) {
         value: balance.total
       }]
     };
-      wallet.createTX(options, function(err, tx) {
+    wallet.createTX(options).then(function(tx) {
-        if (err)
-          throw err;
-
       // Need to pass our passphrase back in to sign!
-        wallet.sign(tx, 'foo', function(err) {
+      return wallet.sign(tx, 'foo');
-          if (err)
+    }).then(function(tx) {
-            throw err;
-
       console.log('sending tx:');
       console.log(tx);
-
+      return node.sendTX(tx);
-          node.sendTX(tx, function(err) {
+    }).then(function() {
-            if (err) {
-              // Could be a reject
-              // packet or a timeout.
-              return console.log(err);
-            }
       console.log('tx sent!');
     });
   });
-      });
-    });
-  });
 });
 
 node.chain.on('block', function(block) {
@@ -377,12 +333,7 @@ node.mempool.on('tx', function(tx) {
 });
 
 node.chain.on('full', function() {
-  node.mempool.getHistory(function(err, txs) {
+  node.mempool.getHistory().then(console.log);
-    if (err)
-      throw err;
-
-    console.log(txs);
-  });
 });
 ```