Adding a custom purchase validator / provider

elementalcode · April 23, 2024, 4:15pm

If I were to implement a custom purchase validator… (in this case xsolla)… Can I do the “same” thing as others payments?
This is the facebook one…

github.com

heroiclabs/nakama/blob/master/server/core_purchase.go#L337


      
          			SeenBefore:       p.seenBefore,
          			Environment:      p.environment,
          		})
          	}
          
          	return &api.ValidatePurchaseResponse{
          		ValidatedPurchases: validatedPurchases,
          	}, nil
          }
          
          func ValidatePurchaseFacebookInstant(ctx context.Context, logger *zap.Logger, db *sql.DB, userID uuid.UUID, config *IAPFacebookInstantConfig, signedRequest string, persist bool) (*api.ValidatePurchaseResponse, error) {
          	payment, rawResponse, err := iap.ValidateReceiptFacebookInstant(config.AppSecret, signedRequest)
          	if err != nil {
          		if err != context.Canceled {
          			logger.Error("Error validating Facebook Instant receipt", zap.Error(err))
          		}
          		return nil, err
          	}
          
          	sPurchase := &storagePurchase{
          		userID:        userID,

Assuming I get the network handshake correctly (a function equivalent to what can be found in the iap module)… could I upsert my purchase into the database so I can take advantage of the whole Nakama security features like replay protection and stuff?

I see that upsertPurchase is not exported, but it’s just a db query function that I could recreate on my side. But I know that messing directly with the db is unadviced.

I understand that this is not the ideal way to use nakama and here be dragons

I just want to know if I am missing something more in the purchase validation flow
(Or maybe there is an easier way to add a custom validator )

Thank you for your time!

mofirouz · April 23, 2024, 5:30pm

I think it’s safe, but it can only be known during a PR review if you are willing to upstream your changes.

animeeples · June 17, 2024, 12:55am

Hi @elementalcode,

Did you end up figuring out how to create a custom validator?

Or a way to just manually add a purchase record?

Thank you!

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Adding a custom purchase validator / provider

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