♻️ Refactor payment services

pkg/internal/services/payment.go

@@ -0,0 +1,50 @@
+package services
+
+import (
+	"fmt"
+
+	"git.solsynth.dev/hypernet/wallet/pkg/internal/database"
+	"git.solsynth.dev/hypernet/wallet/pkg/internal/models"
+	"github.com/shopspring/decimal"
+)
+
+func MakeTransaction(amount float64, remark string, payer, payee *models.Wallet) (models.Transaction, error) {
+	transaction := models.Transaction{
+		Amount: decimal.NewFromFloat(amount),
+		Remark: remark,
+	}
+	if payer != nil {
+		transaction.PayerID = &payer.ID
+	}
+	if payee != nil {
+		transaction.PayeeID = &payee.ID
+	}
+
+	tx := database.C.Begin()
+
+	if err := tx.Create(&transaction).Error; err != nil {
+		tx.Rollback()
+		return transaction, err
+	}
+
+	if payer != nil {
+		payer.Balance = payer.Balance.Sub(transaction.Amount)
+		if err := tx.Model(payer).
+			Updates(&models.Wallet{Balance: payer.Balance}).Error; err != nil {
+			tx.Rollback()
+			return transaction, fmt.Errorf("failed to update payer wallet balance: %w", err)
+		}
+	}
+	if payee != nil {
+		payee.Balance = payee.Balance.Add(transaction.Amount)
+		if err := tx.Model(payee).
+			Updates(&models.Wallet{Balance: payee.Balance}).Error; err != nil {
+			tx.Rollback()
+			return transaction, fmt.Errorf("failed to update payee wallet balance: %w", err)
+		}
+	}
+
+	tx.Commit()
+
+	return transaction, nil
+}