use shopspring/decimal library everywhere

internal/record.go

@@ -1,80 +1,17 @@
 package internal
 
 import (
-	"container/list"
-	"math/big"
 	"time"
+
+	"github.com/shopspring/decimal"
 )
 
 type Record interface {
 	Symbol() string
 	Side() Side
-	Price() *big.Float
-	Quantity() *big.Float
+	Price() decimal.Decimal
+	Quantity() decimal.Decimal
 	Timestamp() time.Time
-	Fees() *big.Float
-	Taxes() *big.Float
-}
-
-type RecordQueue struct {
-	l *list.List
-}
-
-// Push inserts the Record at the back of the queue. If pushing a nil Record then it's a no-op.
-func (rq *RecordQueue) Push(r Record) {
-	if r == nil {
-		return
-	}
-
-	if rq == nil {
-		// This would cause a panic anyway so, we panic with a more meaningful message
-		panic("Push to nil RecordQueue")
-	}
-
-	if rq.l == nil {
-		rq.l = list.New()
-	}
-
-	rq.l.PushBack(r)
-}
-
-// Pop removes and returns the first Record of the queue in the 1st return value. If the list is
-// empty returns false on the 2nd return value, true otherwise.
-func (rq *RecordQueue) Pop() (Record, bool) {
-	el := rq.frontElement()
-	if el == nil {
-		return nil, false
-	}
-
-	val := rq.l.Remove(el)
-
-	return val.(Record), true
-}
-
-// Peek returns the front Record of the queue in the 1st return value. If the list is empty returns
-// false on the 2nd return value, true otherwise.
-func (rq *RecordQueue) Peek() (Record, bool) {
-	el := rq.frontElement()
-	if el == nil {
-		return nil, false
-	}
-
-	return el.Value.(Record), true
-}
-
-func (rq *RecordQueue) frontElement() *list.Element {
-	if rq == nil || rq.l == nil {
-		return nil
-	}
-
-	return rq.l.Front()
-}
-
-// Len returns how many elements are currently on the queue
-func (rq *RecordQueue) Len() int {
-	if rq == nil || rq.l == nil {
-		return 0
-	}
-
-	return rq.l.Len()
+	Fees() decimal.Decimal
+	Taxes() decimal.Decimal
 }