Update project structure and build process

libwallet/newop/nts.go

@@ -0,0 +1,51 @@
+package newop
+
+import (
+	"strings"
+
+	"github.com/muun/libwallet/operation"
+)
+
+type SizeForAmount struct {
+	SizeInVByte int64
+	AmountInSat int64
+	Outpoint    string
+}
+
+// NextTransactionSize is a struct used for calculating fees in terms of the
+// unspent outputs required to perform a transaction
+type NextTransactionSize struct {
+	SizeProgression     []SizeForAmount
+	ValidAtOperationHid int64 // Just for debugging reasons
+	ExpectedDebtInSat   int64
+}
+
+func (w *NextTransactionSize) AddSizeForAmount(item *SizeForAmount) {
+	w.SizeProgression = append(w.SizeProgression, *item)
+}
+
+func (w *NextTransactionSize) GetOutpoints() string {
+	var sb strings.Builder
+	for i, sizeForAmount := range w.SizeProgression {
+		sb.WriteString(sizeForAmount.Outpoint)
+		if i != len(w.SizeProgression)-1 { // avoid trailing \n at the end
+			sb.WriteRune('\n')
+		}
+
+	}
+	return sb.String()
+}
+
+func (w *NextTransactionSize) toInternalType() *operation.NextTransactionSize {
+	var sizeProgression []operation.SizeForAmount
+	for _, sizeForAmount := range w.SizeProgression {
+		sizeProgression = append(sizeProgression, operation.SizeForAmount{
+			SizeInVByte: sizeForAmount.SizeInVByte,
+			AmountInSat: sizeForAmount.AmountInSat,
+		})
+	}
+	return &operation.NextTransactionSize{
+		SizeProgression:   sizeProgression,
+		ExpectedDebtInSat: w.ExpectedDebtInSat,
+	}
+}