descovi · January 25, 2021 18:00 · Jan 25, 2021 · Jan 25, 2021 · Jan 25, 2021 · Jan 25, 2021
diff --git a/wei.rb b/wei.rb
@@ -1,6 +1,6 @@
 # Example of usage: 
 # result = WeiConverter.new(1890000000000000000).call
-# Result contain  1.89
+# Result contains 1.89
 
 class WeiConverter
 

diff --git a/wei.rb b/wei.rb
@@ -1,4 +1,6 @@
-# Example: WeiConverter.new(wei_number).call
+# Example of usage: 
+# result = WeiConverter.new(1890000000000000000).call
+# Result contain  1.89
 
 class WeiConverter
 

diff --git a/wei.rb b/wei.rb
@@ -1,4 +1,6 @@
-class Wei
+# Example: WeiConverter.new(wei_number).call
+
+class WeiConverter
 
   UNITS = {
     wei:        1,

diff --git a/wei.rb b/wei.rb
@@ -0,0 +1,40 @@
+class Wei
+
+  UNITS = {
+    wei:        1,
+    kwei:       1000,
+    ada:        1000,
+    femtoether: 1000,
+    mwei:       1000000,
+    babbage:    1000000,
+    picoether:  1000000,
+    gwei:       1000000000,
+    shannon:    1000000000,
+    nanoether:  1000000000,
+    nano:       1000000000,
+    szabo:      1000000000000,
+    microether: 1000000000000,
+    micro:      1000000000000,
+    finney:     1000000000000000,
+    milliether: 1000000000000000,
+    milli:      1000000000000000,
+    ether:      1000000000000000000,
+    eth:        1000000000000000000,
+    kether:     1000000000000000000000,
+    grand:      1000000000000000000000,
+    einstein:   1000000000000000000000,
+    mether:     1000000000000000000000000,
+    gether:     1000000000000000000000000000,
+    tether:     1000000000000000000000000000000
+  }
+
+  def initialize(amount)
+    @amount = amount
+  end
+
+  def call(unit: "ether")
+    return nil if @amount.nil?
+    unit = UNITS[unit.to_sym]
+    (BigDecimal.new(@amount, 16) / BigDecimal.new(unit, 16)).to_s rescue nil
+  end
+end