Move Big* vars to big.go

common/big.go

@@ -2,6 +2,19 @@ package common
 
 import "math/big"
 
+// Common big integers often used
+var (
+	Big1     = big.NewInt(1)
+	Big2     = big.NewInt(2)
+	Big3     = big.NewInt(3)
+	Big0     = big.NewInt(0)
+	BigTrue  = Big1
+	BigFalse = Big0
+	Big32    = big.NewInt(32)
+	Big256   = big.NewInt(0xff)
+	Big257   = big.NewInt(257)
+)
+
 // Big pow
 //
 // Returns the power of two big integers