Design updates with error handling

spec/strike_me/btc_spec.rb

@@ -44,7 +44,7 @@ RSpec.describe StrikeMe::BTC do
 
   context 'arithmetic' do
     it 'supports multiplication with numbers' do
-      btc1 = described_class.new(234_529)
+      btc1 = described_class.new 234_529
       btc2 = btc1 * 3
       btc3 = btc2 * 2.9
 
@@ -54,14 +54,14 @@ RSpec.describe StrikeMe::BTC do
       expect(btc2).not_to eq btc1
       expect(btc2).not_to eq btc3
 
-      expect(btc1.sats).to eq 234_529
-      expect(btc1).to eq  234_529
-      expect(btc2).to eq  703_587
-      expect(btc3).to eq 2_040_402
+      expect(btc1.sats).to eq   234_529
+      expect(btc1).to      eq   234_529
+      expect(btc2).to      eq   703_587
+      expect(btc3).to      eq 2_040_402
     end
 
     it 'supports division with numbers' do
-      btc1 = described_class.new(34_529)
+      btc1 = described_class.new 34_529
       btc2 = btc1 / 3
       btc3 = btc2 / 2.9
 
@@ -74,7 +74,7 @@ RSpec.describe StrikeMe::BTC do
       expect(btc1.sats).to eq 34_529
       expect(btc1).to eq      34_529
       expect(btc2).to eq      11_509
-      expect(btc3).to eq 3_968
+      expect(btc3).to eq       3_968
     end
 
     it 'supports addition with other BTC objects' do
@@ -89,8 +89,8 @@ RSpec.describe StrikeMe::BTC do
     end
 
     it 'supports subtraction with other BTC objects' do
-      btc1 = described_class.new(34_529)
-      btc2 = described_class.new(2_556)
+      btc1 = described_class.new 34_529
+      btc2 = described_class.new  2_556
       btc3 = btc1 - btc2
 
       expect { btc1 - 23 }.to raise_error StrikeMe::BTC::Error
@@ -101,6 +101,7 @@ RSpec.describe StrikeMe::BTC do
   end
 
   it 'is consistent for small values' do
+    # if floor is used instead of round, the small number 3, multiplied by 100 million can result in 2.99999999 leading to 2
     string = 3.sats.to_s
     expect(string).to eq '0.00000003'
     expect(string.to_f.btc.sats).to eq 3