63d1860dc0
Add a full payment and subscription system supporting EasyPay (Alipay/WeChat), Stripe, and direct Alipay/WeChat Pay providers with multi-instance load balancing.
54 lines
1.8 KiB
Go
54 lines
1.8 KiB
Go
package payment
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import (
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"encoding/hex"
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"fmt"
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"log/slog"
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dbent "github.com/Wei-Shaw/sub2api/ent"
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"github.com/Wei-Shaw/sub2api/internal/config"
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"github.com/google/wire"
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)
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// EncryptionKey is a named type for the payment encryption key (AES-256, 32 bytes).
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// Using a named type avoids Wire ambiguity with other []byte parameters.
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type EncryptionKey []byte
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// ProvideEncryptionKey derives the payment encryption key from the TOTP encryption key in config.
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// When the key is empty, nil is returned (payment features that need encryption will be disabled).
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// When the key is non-empty but invalid (bad hex or wrong length), an error is returned
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// to prevent startup with a misconfigured encryption key.
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func ProvideEncryptionKey(cfg *config.Config) (EncryptionKey, error) {
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if cfg.Totp.EncryptionKey == "" {
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slog.Warn("payment encryption key not configured — encrypted payment config will be unavailable")
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return nil, nil
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}
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key, err := hex.DecodeString(cfg.Totp.EncryptionKey)
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if err != nil {
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return nil, fmt.Errorf("invalid payment encryption key (hex decode): %w", err)
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}
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if len(key) != 32 {
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return nil, fmt.Errorf("payment encryption key must be 32 bytes, got %d", len(key))
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}
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return EncryptionKey(key), nil
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}
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// ProvideRegistry creates an empty payment provider registry.
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// Providers are registered at runtime after application startup.
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func ProvideRegistry() *Registry {
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return NewRegistry()
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}
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// ProvideDefaultLoadBalancer creates a DefaultLoadBalancer backed by the ent client.
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func ProvideDefaultLoadBalancer(client *dbent.Client, key EncryptionKey) *DefaultLoadBalancer {
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return NewDefaultLoadBalancer(client, []byte(key))
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}
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// ProviderSet is the Wire provider set for the payment package.
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var ProviderSet = wire.NewSet(
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ProvideEncryptionKey,
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ProvideRegistry,
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ProvideDefaultLoadBalancer,
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wire.Bind(new(LoadBalancer), new(*DefaultLoadBalancer)),
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)
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