Creating Genesys Cloud Interaction Internal Notes via Go SDK

What You Will Build

• This tutorial builds a Go service that creates internal annotations on Genesys Cloud interactions using the Interaction API.
• It uses the POST /api/v2/interactions/annotations endpoint and the official purecloudplatformclientv2 SDK.
• The implementation covers Go 1.21+ with production-grade validation, metrics tracking, audit logging, and external callback synchronization.

Prerequisites

• OAuth client type: Confidential client (Client Credentials Grant)
• Required OAuth scope: annotation:write
• SDK: github.com/myPureCloud/platform-client-v2-go/platformclientv2 (v2.0.0+)
• Runtime: Go 1.21 or later
• External dependencies: golang.org/x/net/html, time, net/http, sync, context

Authentication Setup

Genesys Cloud requires OAuth 2.0 for all API calls. The Go SDK handles token acquisition and caching automatically when configured with the OAuthClient. You must register a confidential client in the Genesys Cloud Admin portal and grant the annotation:write scope.

package main

import (
	"context"
	"fmt"
	"log"
	"time"

	"github.com/myPureCloud/platform-client-v2-go/platformclientv2"
)

func initGenesysClient(clientID, clientSecret string) (*platformclientv2.Configuration, error) {
	cfg := platformclientv2.NewConfiguration()
	cfg.BasePath = "https://api.mypurecloud.com"
	
	// Initialize OAuth client for token management
	oauthClient := platformclientv2.NewOAuthClient(cfg)
	
	// Request token with required scope
	_, err := oauthClient.ClientCredentials(clientID, clientSecret, []string{"annotation:write"})
	if err != nil {
		return nil, fmt.Errorf("oauth token acquisition failed: %w", err)
	}

	// Enable automatic token refresh
	cfg.OAuthClient = oauthClient
	return cfg, nil
}

The SDK caches the access token in memory and refreshes it before expiration. You do not need to implement manual refresh logic. The configuration object passes the cached token in the Authorization: Bearer <token> header for every subsequent request.

Implementation

Step 1: Initialize Client and Configure Validation Pipeline

Interaction annotations require strict payload validation. Genesys Cloud rejects malformed timestamps, oversized bodies, and unescaped HTML. You must implement a validation pipeline that enforces maximum character limits, sanitizes HTML tags, and verifies RFC3339 timestamp formatting before transmission.

package main

import (
	"errors"
	"regexp"
	"time"
	"unicode/utf8"
)

const (
	MaxNoteLength = 5000
	ValidVisibility = "internal"
)

var htmlTagRegex = regexp.MustCompile(`<[^>]*>`)

func sanitizeNoteBody(rawBody string) (string, error) {
	if len(rawBody) == 0 {
		return "", errors.New("note body cannot be empty")
	}

	// Strip all HTML tags to prevent injection and formatting conflicts
	cleanBody := htmlTagRegex.ReplaceAllString(rawBody, "")
	
	// Enforce maximum character limit using rune count for Unicode safety
	runeCount := utf8.RuneCountInString(cleanBody)
	if runeCount > MaxNoteLength {
		return "", fmt.Errorf("note body exceeds %d character limit (received %d)", MaxNoteLength, runeCount)
	}

	return cleanBody, nil
}

func validateTimestamp(ts string) error {
	_, err := time.Parse(time.RFC3339, ts)
	if err != nil {
		return fmt.Errorf("timestamp must be valid RFC3339 format: %w", err)
	}
	return nil
}

func validateVisibility(scope string) error {
	if scope != ValidVisibility {
		return fmt.Errorf("unsupported visibility scope: %q. Must be %q", scope, ValidVisibility)
	}
	return nil
}

The validation pipeline runs synchronously before network I/O. This prevents wasted bandwidth and protects your application from schema rejection errors. The utf8.RuneCountInString function ensures accurate character counting for multilingual notes.

Step 2: Construct Annotation Payload and Validate Schema

The Interaction API accepts annotations via POST /api/v2/interactions/annotations. The payload requires an interaction UUID, an array of annotation objects, and explicit visibility directives. The Go SDK uses pointer fields for optional parameters, which requires explicit initialization.

package main

import (
	"fmt"

	"github.com/myPureCloud/platform-client-v2-go/platformclientv2"
)

func buildAnnotationPayload(interactionID string, cleanBody string, visibility string) (*platformclientv2.Createinteractionannotationsrequest, error) {
	if err := validateVisibility(visibility); err != nil {
		return nil, err
	}

	req := platformclientv2.NewCreateinteractionannotationsrequest()
	req.SetInteractionId(interactionID)

	annotation := platformclientv2.NewAnnotation()
	annotation.SetType("note")
	annotation.SetBody(cleanBody)
	annotation.SetVisibility(visibility)
	annotation.SetTimestamp(time.Now().UTC().Format(time.RFC3339))

	req.SetAnnotations([]platformclientv2.Annotation{*annotation})
	return req, nil
}

The SDK constructor NewCreateinteractionannotationsrequest() initializes a zero-valued struct. You must call SetInteractionId() explicitly because the SDK treats nil pointers as unprovided fields. The visibility: "internal" directive triggers automatic supervisor notifications in Genesys Cloud. You do not need to manually configure notification routing.

Step 3: Execute Atomic POST and Handle Response

The annotation insertion uses a single atomic POST operation. You must implement retry logic for HTTP 429 rate limit responses and explicit handling for authentication failures. The following block demonstrates the raw HTTP cycle for reference, followed by the SDK implementation with retry logic.

HTTP Request Cycle Reference:

POST /api/v2/interactions/annotations HTTP/1.1
Host: api.mypurecloud.com
Authorization: Bearer eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9...
Content-Type: application/json

{
  "interactionId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "annotations": [
    {
      "type": "note",
      "body": "Customer requested callback within 24 hours.",
      "visibility": "internal",
      "timestamp": "2023-10-27T14:32:00Z"
    }
  ]
}

HTTP Response (201 Created):

{
  "interactionId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "annotations": [
    {
      "id": "98765432-10ab-cdef-1234-567890abcdef",
      "type": "note",
      "body": "Customer requested callback within 24 hours.",
      "visibility": "internal",
      "timestamp": "2023-10-27T14:32:00Z"
    }
  ]
}

SDK Implementation with Retry Logic:

package main

import (
	"context"
	"fmt"
	"net/http"
	"time"

	"github.com/myPureCloud/platform-client-v2-go/platformclientv2"
)

func createAnnotationWithRetry(ctx context.Context, api *platformclientv2.AnnotationApi, req *platformclientv2.Createinteractionannotationsrequest, maxRetries int) (*platformclientv2.Postinteractionsannotationsresponse, error) {
	var lastErr error
	var resp *platformclientv2.Postinteractionsannotationsresponse
	var httpResp *http.Response

	for attempt := 0; attempt <= maxRetries; attempt++ {
		resp, httpResp, lastErr = api.CreateInteractionAnnotations(ctx, req)
		
		if lastErr != nil {
			return nil, fmt.Errorf("sdk error: %w", lastErr)
		}

		switch httpResp.StatusCode {
		case http.StatusCreated:
			return resp, nil
		case http.StatusUnauthorized, http.StatusForbidden:
			return nil, fmt.Errorf("access denied: %d %s", httpResp.StatusCode, httpResp.Status)
		case http.StatusTooManyRequests:
			if attempt == maxRetries {
				return nil, fmt.Errorf("max retries reached for 429 rate limit")
			}
			backoff := time.Duration(attempt+1) * 1 * time.Second
			time.Sleep(backoff)
			continue
		case http.StatusInternalServerError, http.StatusBadGateway, http.StatusServiceUnavailable:
			if attempt == maxRetries {
				return nil, fmt.Errorf("server error after %d attempts: %d", maxRetries, httpResp.StatusCode)
			}
			backoff := time.Duration(attempt+1) * 2 * time.Second
			time.Sleep(backoff)
			continue
		default:
			return nil, fmt.Errorf("unexpected status: %d %s", httpResp.StatusCode, httpResp.Status)
		}
	}

	return nil, lastErr
}

The retry loop implements exponential backoff for 429 and 5xx responses. You must check httpResp.StatusCode explicitly because the SDK returns a populated response object even on non-2xx status codes. The context parameter enables timeout cancellation for long-running deployments.

Step 4: Implement Callback, Metrics, and Audit Logging

Production integrations require observability. You must track latency, success rates, and generate immutable audit logs. The following structure exposes a callback interface for external documentation synchronization and a concurrent-safe metrics tracker.

package main

import (
	"context"
	"fmt"
	"log"
	"sync"
	"time"
)

type ExternalCallback func(interactionID string, annotationID string, success bool, latency time.Duration)

type NoteCreator struct {
	api      *platformclientv2.AnnotationApi
	logger   *log.Logger
	callback ExternalCallback
	metrics  *Metrics
}

type Metrics struct {
	mu            sync.Mutex
	totalAttempts int
	successCount  int
}

func (m *Metrics) RecordAttempt(success bool) {
	m.mu.Lock()
	defer m.mu.Unlock()
	m.totalAttempts++
	if success {
		m.successCount++
	}
}

func (m *Metrics) GetSuccessRate() float64 {
	m.mu.Lock()
	defer m.mu.Unlock()
	if m.totalAttempts == 0 {
		return 0.0
	}
	return float64(m.successCount) / float64(m.totalAttempts)
}

func NewNoteCreator(cfg *platformclientv2.Configuration, callback ExternalCallback) (*NoteCreator, error) {
	api := platformclientv2.NewAnnotationApi(cfg)
	return &NoteCreator{
		api:      api,
		logger:   log.Default(),
		callback: callback,
		metrics:  &Metrics{},
	}, nil
}

func (nc *NoteCreator) CreateInternalNote(ctx context.Context, interactionID, rawBody, visibility string) error {
	startTime := time.Now()
	
	cleanBody, err := sanitizeNoteBody(rawBody)
	if err != nil {
		nc.logger.Printf("validation failed for interaction %s: %v", interactionID, err)
		nc.metrics.RecordAttempt(false)
		return err
	}

	req, err := buildAnnotationPayload(interactionID, cleanBody, visibility)
	if err != nil {
		nc.logger.Printf("payload construction failed: %v", err)
		nc.metrics.RecordAttempt(false)
		return err
	}

	resp, err := createAnnotationWithRetry(ctx, nc.api, req, 3)
	latency := time.Since(startTime)

	success := err == nil
	nc.metrics.RecordAttempt(success)

	annotationID := "unknown"
	if success && len(resp.Annotations) > 0 {
		annotationID = *resp.Annotations[0].Id
	}

	nc.logger.Printf("audit: interaction=%s annotation=%s success=%v latency=%v", interactionID, annotationID, success, latency)

	if nc.callback != nil {
		go nc.callback(interactionID, annotationID, success, latency)
	}

	return err
}

The NoteCreator struct encapsulates the API client, validation pipeline, and observability hooks. The callback executes asynchronously to prevent blocking the main request thread. The audit log prints to standard output but can be routed to a file or message queue by replacing log.Default(). The metrics tracker uses sync.Mutex to prevent race conditions during concurrent note creation.

Complete Working Example

The following script combines authentication, validation, API execution, and observability into a single runnable module. Replace the placeholder credentials with your Genesys Cloud client values.

package main

import (
	"context"
	"fmt"
	"log"
	"os"
	"time"

	"github.com/myPureCloud/platform-client-v2-go/platformclientv2"
)

func main() {
	clientID := os.Getenv("GENESYS_CLIENT_ID")
	clientSecret := os.Getenv("GENESYS_CLIENT_SECRET")
	interactionID := os.Getenv("TARGET_INTERACTION_ID")

	if clientID == "" || clientSecret == "" || interactionID == "" {
		log.Fatal("GENESYS_CLIENT_ID, GENESYS_CLIENT_SECRET, and TARGET_INTERACTION_ID must be set")
	}

	cfg, err := initGenesysClient(clientID, clientSecret)
	if err != nil {
		log.Fatalf("authentication failed: %v", err)
	}

	creator, err := NewNoteCreator(cfg, func(interactionID, annotationID string, success bool, latency time.Duration) {
		fmt.Printf("external_sync: interaction=%s annotation=%s synced=%v latency=%v\n", interactionID, annotationID, success, latency)
	})
	if err != nil {
		log.Fatalf("creator initialization failed: %v", err)
	}

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	rawNote := "<b>Internal review:</b> Customer verified identity via email. Escalated to tier 2."
	err = creator.CreateInternalNote(ctx, interactionID, rawNote, "internal")
	if err != nil {
		log.Fatalf("note creation failed: %v", err)
	}

	fmt.Printf("success rate: %.2f%%\n", creator.metrics.GetSuccessRate()*100)
}

Run the script with go run main.go. The program validates the HTML payload, strips tags, enforces the character limit, executes the atomic POST with retry logic, and triggers the external callback. The success rate prints to standard output after execution.

Common Errors & Debugging

Error: 401 Unauthorized or 403 Forbidden

• Cause: The OAuth token lacks the annotation:write scope, or the client credentials are invalid.
• Fix: Verify the client ID and secret in the Genesys Cloud Admin portal. Ensure the OAuth client configuration explicitly requests annotation:write. Regenerate the token if it expired.
• Code Fix: The initGenesysClient function validates scope during token acquisition. Add cfg.SetOAuthScope([]string{"annotation:write"}) if using a custom token provider.

Error: 422 Unprocessable Entity

• Cause: The annotation body contains invalid characters, exceeds the length limit, or uses an unsupported visibility scope.
• Fix: Run the payload through the sanitizeNoteBody and validateVisibility functions before transmission. Verify the interaction UUID exists in the correct Genesys Cloud organization.
• Code Fix: Check the validation error message returned by sanitizeNoteBody. Truncate or escape the input string before retrying.

Error: 429 Too Many Requests

• Cause: The application exceeded the Genesys Cloud rate limit for annotation creation.
• Fix: Implement exponential backoff. The createAnnotationWithRetry function handles this automatically. Reduce concurrent goroutines if executing bulk operations.
• Code Fix: Increase maxRetries in the retry loop or add a global request limiter using golang.org/x/time/rate.

Error: SDK Pointer Nil Panic

• Cause: The Go SDK returns pointer fields for optional parameters. Dereferencing a nil pointer causes a runtime panic.
• Fix: Always check for nil before dereferencing SDK response fields. Use the SDK’s provided getter methods or inline nil checks.
• Code Fix: Replace *resp.Annotations[0].Id with ptrVal(resp.Annotations[0].Id) where ptrVal safely returns a zero value on nil.

Official References

• Interaction Annotations API Documentation
• Genesys Cloud Go SDK Reference
• OAuth 2.0 Client Credentials Flow
• Annotation Object Schema