fix: shared renamed to pkg, formatting changes

pkg/plugin/definition/publisher.go

@@ -0,0 +1,16 @@
+package definition
+
+import "context"
+
+// Publisher defines the general publisher interface for messaging plugins.
+type Publisher interface {
+	// Publish sends a message (as a byte slice) using the underlying messaging system.
+	Publish(ctx context.Context, msg []byte) error
+
+	Close() error // Important for releasing resources.
+}
+
+type PublisherProvider interface {
+	// New initializes a new publisher instance with the given configuration.
+	New(ctx context.Context, config map[string]string) (Publisher, error)
+}

pkg/plugin/definition/signVerifier.go

@@ -0,0 +1,22 @@
+package definition
+
+import "context"
+
+// Verifier defines the method for verifying signatures.
+type Verifier interface {
+	// Verify checks the validity of the signature for the given body.
+	Verify(ctx context.Context, body []byte, header []byte, publicKeyBase64 string) (bool, error)
+	Close() error // Close for releasing resources
+}
+
+// VerifierProvider initializes a new Verifier instance with the given config.
+type VerifierProvider interface {
+	// New creates a new Verifier instance based on the provided config.
+	New(ctx context.Context, config map[string]string) (Verifier, func() error, error)
+}
+
+// PublicKeyManager is the interface for key management plugin.
+type PublicKeyManager interface {
+	// PublicKey retrieves the public key for the given subscriberID and keyID.
+	PublicKey(ctx context.Context, subscriberID string, keyID string) (string, error)
+}

pkg/plugin/definition/signer.go

@@ -0,0 +1,24 @@
+package definition
+
+import "context"
+
+// Signer defines the method for signing.
+type Signer interface {
+	// Sign generates a signature for the given body and privateKeyBase64.
+	// The signature is created with the given timestamps: createdAt (signature creation time)
+	// and expiresAt (signature expiration time).
+	Sign(ctx context.Context, body []byte, privateKeyBase64 string, createdAt, expiresAt int64) (string, error)
+	Close() error // Close for releasing resources
+}
+
+// SignerProvider initializes a new signer instance with the given config.
+type SignerProvider interface {
+	// New creates a new signer instance based on the provided config.
+	New(ctx context.Context, config map[string]string) (Signer, func() error, error)
+}
+
+// PrivateKeyManager is the interface for key management plugin.
+type PrivateKeyManager interface {
+	// PrivateKey retrieves the private key for the given subscriberID and keyID.
+	PrivateKey(ctx context.Context, subscriberID string, keyID string) (string, error)
+}