Add linter checks to GHA & Fix code to pass lints

Add linter checks to GHA & Fix code to pass lints.
The linters added are:
- whitespace: Tool for detection of leading and trailing whitespace
- gosec: Inspects source code for security problems
- gci: Gci control golang package import order and make it always deterministic
- misspell: Finds commonly misspelled English words in comments
- gomnd: An analyzer to detect magic numbers

The file utils/utils.go is excluded from the checks of gomnd, as uses magic numbers through the code

utils/utils.go

@@ -1,3 +1,4 @@
+//nolint:gomnd
 package utils
 
 import (
@@ -33,9 +34,7 @@ func (fl16 *Float16) BigInt() *big.Int {
 	res := m.Mul(m, exp)
 
 	if e5 != 0 && e.Cmp(big.NewInt(0)) != 0 {
-
 		res.Add(res, exp.Div(exp, big.NewInt(2)))
-
 	}
 	return res
 }
@@ -56,11 +55,9 @@ func floorFix2Float(_f *big.Int) Float16 {
 	s := big.NewInt(0).Rsh(m, 10)
 
 	for s.Cmp(zero) != 0 {
-
 		m.Div(m, ten)
 		s.Rsh(m, 10)
 		e++
-
 	}
 
 	return Float16(m.Int64() | e<<11)
@@ -98,13 +95,11 @@ func NewFloat16(f *big.Int) (Float16, error) {
 	d3 := big.NewInt(0).Abs(fi3.Sub(fi3, f))
 
 	if d.Cmp(d3) == 1 {
-
 		res = fl3
 	}
 
 	// Do rounding check
 	if res.BigInt().Cmp(f) == 0 {
-
 		return res, nil
 	}
 	return res, ErrRoundingLoss

utils/utils_test.go

@@ -8,7 +8,6 @@ import (
 )
 
 func TestConversions(t *testing.T) {
-
 	testVector := map[Float16]string{
 		0x307B: "123000000",
 		0x1DC6: "454500",
@@ -24,7 +23,6 @@ func TestConversions(t *testing.T) {
 	}
 
 	for test := range testVector {
-
 		fix := test.BigInt()
 
 		assert.Equal(t, fix.String(), testVector[test])
@@ -37,13 +35,10 @@ func TestConversions(t *testing.T) {
 
 		fx2 := fl.BigInt()
 		assert.Equal(t, fx2.String(), testVector[test])
-
 	}
-
 }
 
 func TestFloorFix2Float(t *testing.T) {
-
 	testVector := map[string]Float16{
 		"87999990000000000": 0x776f,
 		"87950000000000001": 0x776f,
@@ -52,16 +47,13 @@ func TestFloorFix2Float(t *testing.T) {
 	}
 
 	for test := range testVector {
-
 		bi := big.NewInt(0)
 		bi.SetString(test, 10)
 
 		testFloat := NewFloat16Floor(bi)
 
 		assert.Equal(t, testFloat, testVector[test])
-
 	}
-
 }
 
 func TestConversionLosses(t *testing.T) {
@@ -94,7 +86,6 @@ func TestConversionLosses(t *testing.T) {
 	assert.Equal(t, ErrRoundingLoss, err)
 	c = b.BigInt()
 	assert.NotEqual(t, c, a)
-
 }
 
 func BenchmarkFloat16(b *testing.B) {