Simplified driver example

driver.js

@@ -1,6 +1,8 @@
 "use strict";
 
 let Blockchain = require('./blockchain.js');
+
+// FIXME: Figure out how to remove these imports
 let Block = require('./block.js');
 let Client = require('./client.js');
 let Miner = require('./miner.js');
@@ -10,88 +12,54 @@ let FakeNet = require('./fake-net.js');
 
 console.log("Starting simulation.  This may take a moment...");
 
-
-let fakeNet = new FakeNet();
-
-// Clients
-let alice = new Client({name: "Alice", net: fakeNet});
-let bob = new Client({name: "Bob", net: fakeNet});
-let charlie = new Client({name: "Charlie", net: fakeNet});
-
-// Miners
-let minnie = new Miner({name: "Minnie", net: fakeNet});
-let mickey = new Miner({name: "Mickey", net: fakeNet});
-
 // Creating genesis block
-let genesis = Blockchain.makeGenesis({
+let bc = Blockchain.createInstance({
   blockClass: Block,
+  clientClass: Client,
+  minerClass: Miner,
   transactionClass: Transaction,
-  clientBalanceMap: new Map([
-    [alice, 233],
-    [bob, 99],
-    [charlie, 67],
-    [minnie, 400],
-    [mickey, 300],
-  ]),
+  clients: [
+    {name: 'Alice', amount: 233},
+    {name: 'Bob', amount: 99},
+    {name: 'Charlie', amount: 67},
+    {name: 'Minnie', amount: 400, mining: true},
+    {name: 'Mickey', amount: 300, mining: true},
+  ],
+  net: new FakeNet(),
 });
 
-// Late miner - Donald has more mining power, represented by the miningRounds.
-// (Mickey and Minnie have the default of 2000 rounds).
-let donald = new Miner({name: "Donald", net: fakeNet, startingBlock: genesis, miningRounds: 3000});
-
-function showBalances(client) {
-  console.log(`Alice has ${client.lastBlock.balanceOf(alice.address)} gold.`);
-  console.log(`Bob has ${client.lastBlock.balanceOf(bob.address)} gold.`);
-  console.log(`Charlie has ${client.lastBlock.balanceOf(charlie.address)} gold.`);
-  console.log(`Minnie has ${client.lastBlock.balanceOf(minnie.address)} gold.`);
-  console.log(`Mickey has ${client.lastBlock.balanceOf(mickey.address)} gold.`);
-  console.log(`Donald has ${client.lastBlock.balanceOf(donald.address)} gold.`);
-}
+// Get Alice and Bob
+let [alice, bob] = bc.getClients('Alice', 'Bob');
 
 // Showing the initial balances from Alice's perspective, for no particular reason.
 console.log("Initial balances:");
-showBalances(alice);
+alice.showAllBalances();
 
-fakeNet.register(alice, bob, charlie, minnie, mickey);
-
-// Miners start mining.
-minnie.initialize();
-mickey.initialize();
+// The miners will start mining blocks when start is called.  After 5 seconds,
+// the code will terminate and show the final balances from Alice's perspective.
+bc.start(5000, () => {
+  console.log("Final balances, from Alice's perspective:");
+  alice.showAllBalances();
+});
 
 // Alice transfers some money to Bob.
 console.log(`Alice is transferring 40 gold to ${bob.address}`);
 alice.postTransaction([{ amount: 40, address: bob.address }]);
 
 setTimeout(() => {
+  // Late miner - Donald has more mining power, represented by the miningRounds.
+  // (Mickey and Minnie have the default of 2000 rounds).
+  let donald = new Miner({
+    name: "Donald",
+    startingBlock: bc.genesis,
+    miningRounds: 3000,
+  });
+
   console.log();
   console.log("***Starting a late-to-the-party miner***");
   console.log();
-  fakeNet.register(donald);
+  bc.register(donald);
   donald.initialize();
 }, 2000);
 
-// Print out the final balances after it has been running for some time.
-setTimeout(() => {
-  console.log();
-  console.log(`Minnie has a chain of length ${minnie.currentBlock.chainLength}:`);
-
-  console.log();
-  console.log(`Mickey has a chain of length ${mickey.currentBlock.chainLength}:`);
-
-  console.log();
-  console.log(`Donald has a chain of length ${donald.currentBlock.chainLength}:`);
-
-  console.log();
-  console.log("Final balances (Minnie's perspective):");
-  showBalances(minnie);
-
-  console.log();
-  console.log("Final balances (Alice's perspective):");
-  showBalances(alice);
-
-  console.log();
-  console.log("Final balances (Donald's perspective):");
-  showBalances(donald);
 
-  process.exit(0);
-}, 5000);