Archiving Genesys Cloud Closed Cases via Interaction API with Go

What You Will Build

A production-ready Go service that transitions closed cases to archived state, validates payloads against retention constraints and size limits, handles compression and storage-tier logic, synchronizes with external archives via webhooks, and tracks latency and audit logs. This implementation uses the Genesys Cloud Interaction API and the official Go SDK. The tutorial covers Go 1.21+ with explicit error handling, retry logic, and observability patterns.

Prerequisites

• OAuth 2.0 Client Credentials flow with scopes: v2:interaction:read, v2:interaction:write
• Genesys Cloud Go SDK: github.com/MyPureCloud/platform-client-v2-go v1.0+
• Go 1.21+ runtime
• External dependencies: github.com/google/uuid, github.com/pkg/errors, compress/gzip (standard library)
• Access to a Genesys Cloud organization with Interaction API enabled and webhook delivery configured

Authentication Setup

Genesys Cloud uses OAuth 2.0 Client Credentials for server-to-server integration. The token endpoint is /oauth/token. You must cache the token and refresh before expiration. The following implementation uses a thread-safe token cache with automatic refresh logic.

package main

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"sync"
	"time"
)

type OAuthConfig struct {
	ClientID     string
	ClientSecret string
	BaseURL      string
}

type TokenResponse struct {
	AccessToken string `json:"access_token"`
	ExpiresIn   int    `json:"expires_in"`
	TokenType   string `json:"token_type"`
}

type TokenCache struct {
	mu          sync.RWMutex
	token       string
	expiresAt   time.Time
	config      OAuthConfig
	httpClient  *http.Client
}

func NewTokenCache(config OAuthConfig) *TokenCache {
	return &TokenCache{
		config:     config,
		httpClient: &http.Client{Timeout: 10 * time.Second},
	}
}

func (c *TokenCache) GetToken(ctx context.Context) (string, error) {
	c.mu.RLock()
	if time.Now().Before(c.expiresAt) && c.token != "" {
		token := c.token
		c.mu.RUnlock()
		return token, nil
	}
	c.mu.RUnlock()

	return c.refreshToken(ctx)
}

func (c *TokenCache) refreshToken(ctx context.Context) (string, error) {
	payload := fmt.Sprintf(
		"grant_type=client_credentials&client_id=%s&client_secret=%s",
		c.config.ClientID, c.config.ClientSecret,
	)

	req, err := http.NewRequestWithContext(ctx, http.MethodPost, c.config.BaseURL+"/oauth/token", bytes.NewBufferString(payload))
	if err != nil {
		return "", fmt.Errorf("failed to create token request: %w", err)
	}
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")

	resp, err := c.httpClient.Do(req)
	if err != nil {
		return "", fmt.Errorf("token request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return "", fmt.Errorf("token request returned status %d", resp.StatusCode)
	}

	var tokenResp TokenResponse
	if err := json.NewDecoder(resp.Body).Decode(&tokenResp); err != nil {
		return "", fmt.Errorf("failed to decode token response: %w", err)
	}

	c.mu.Lock()
	c.token = tokenResp.AccessToken
	c.expiresAt = time.Now().Add(time.Duration(tokenResp.ExpiresIn-30) * time.Second)
	c.mu.Unlock()

	return c.token, nil
}

Implementation

Step 1: Initialize SDK and OAuth Context

The official Genesys Cloud Go SDK requires a configured Configuration object and an ApiClient. You must attach the OAuth token to the configuration before making API calls. The SDK handles pagination and serialization automatically.

import (
	"github.com/MyPureCloud/platform-client-v2-go/platformclientv2"
	"github.com/MyPureCloud/platform-client-v2-go/platformclientv2/configuration"
)

func InitGenesysClient(ctx context.Context, tokenCache *TokenCache, env string) (*platformclientv2.ApiClient, error) {
	token, err := tokenCache.GetToken(ctx)
	if err != nil {
		return nil, fmt.Errorf("oauth token retrieval failed: %w", err)
	}

	cfg, err := configuration.NewConfiguration()
	if err != nil {
		return nil, fmt.Errorf("sdk configuration failed: %w", err)
	}

	cfg.SetBasePath(fmt.Sprintf("https://%s.mypurecloud.com", env))
	cfg.SetAccessToken(token)

	apiClient, err := platformclientv2.NewApiClient(cfg)
	if err != nil {
		return nil, fmt.Errorf("api client initialization failed: %w", err)
	}

	return apiClient, nil
}

Step 2: Construct Archiving Payloads with Case Reference and Data Matrix

Genesys Cloud interactions use a structured lifecycle. To archive a closed case, you must transition its state using POST /api/v2/interactions/{id}/transitions. The case-ref maps to the interaction ID. The data-matrix maps to interaction classifications and metadata. The store directive maps to the transition type and target state.

type ArchivePayload struct {
	CaseRef       string                 `json:"case_ref"`
	DataMatrix    map[string]interface{} `json:"data_matrix"`
	StoreDirective string               `json:"store_directive"`
	EncryptionKey string               `json:"encryption_key"`
}

func BuildArchiveTransition(interactionID string, classifications map[string]interface{}) platformclientv2.Transition {
	return platformclientv2.Transition{
		Type: platformclientv2.PtrString("state"),
		Target: platformclientv2.PtrString("archived"),
		Classifications: &classifications,
		Metadata: map[string]interface{}{
			"archive_trigger": "automated_lifecycle",
			"timestamp":       time.Now().UTC().Format(time.RFC3339),
		},
	}
}

Step 3: Validate Against Retention Constraints and Maximum Archive Size

Before submitting the transition, you must validate the payload against retention policies and size limits. Genesys Cloud enforces a maximum interaction size of approximately 1 MB. You must calculate compressed size and verify encryption keys for compliance.

func ValidateArchivePayload(payload ArchivePayload, maxBytes int64) error {
	if payload.CaseRef == "" {
		return fmt.Errorf("case_ref is required")
	}

	if payload.StoreDirective != "archived" && payload.StoreDirective != "purged" {
		return fmt.Errorf("invalid store_directive: %s", payload.StoreDirective)
	}

	if payload.EncryptionKey == "" {
		return fmt.Errorf("encryption_key is required for long-term compliance")
	}

	// Simulate compression calculation for storage-tier evaluation
	var buf bytes.Buffer
	gz := gzip.NewWriter(&buf)
	encoder := json.NewEncoder(gz)
	if err := encoder.Encode(payload); err != nil {
		return fmt.Errorf("payload serialization failed: %w", err)
	}
	if err := gz.Close(); err != nil {
		return fmt.Errorf("compression failed: %w", err)
	}

	compressedSize := int64(buf.Len())
	if compressedSize > maxBytes {
		return fmt.Errorf("payload exceeds maximum-archive-size limit: %d/%d bytes", compressedSize, maxBytes)
	}

	return nil
}

Step 4: Atomic HTTP POST with Retry and Storage Tier Evaluation

The Interaction API returns 429 Too Many Requests under high load. You must implement exponential backoff. The following function executes the transition atomically, tracks latency, and evaluates storage tier readiness based on response headers.

type ArchiveResult struct {
	Success      bool
	LatencyMs    float64
	StorageTier  string
	ErrorMessage string
}

func ExecuteArchiveTransition(ctx context.Context, apiClient *platformclientv2.ApiClient, interactionID string, transition platformclientv2.Transition) ArchiveResult {
	start := time.Now()
	api := platformclientv2.NewInteractionApi(apiClient)

	maxRetries := 3
	for attempt := 0; attempt <= maxRetries; attempt++ {
		result, httpResponse, err := api.PostInteractionTransition(interactionID, transition)
		latency := time.Since(start).Milliseconds()

		if err != nil {
			if httpResponse != nil && httpResponse.StatusCode == 429 {
				backoff := time.Duration(attempt+1) * time.Second * 2
				time.Sleep(backoff)
				continue
			}
			return ArchiveResult{
				Success:      false,
				LatencyMs:    float64(latency),
				ErrorMessage: fmt.Sprintf("transition failed: %v", err),
			}
		}

		// Evaluate storage tier from response headers
		tier := httpResponse.Header.Get("X-Genesys-Storage-Tier")
		if tier == "" {
			tier = "default"
		}

		// Verify response contains expected state
		if result != nil && result.State != nil && *result.State == "archived" {
			return ArchiveResult{
				Success:     true,
				LatencyMs:   float64(latency),
				StorageTier: tier,
			}
		}

		return ArchiveResult{
			Success:      false,
			LatencyMs:    float64(latency),
			StorageTier:  tier,
			ErrorMessage: "unexpected response state",
		}
	}

	return ArchiveResult{
		Success:      false,
		LatencyMs:    float64(time.Since(start).Milliseconds()),
		ErrorMessage: "max retries exceeded",
	}
}

Step 5: Synchronize with External Archive and Generate Audit Logs

After successful archival, you must synchronize the event with an external archive system via webhook and generate an immutable audit log. The following implementation handles incomplete-data checking, webhook delivery, and structured logging.

type AuditLog struct {
	Timestamp    string                 `json:"timestamp"`
	CaseRef      string                 `json:"case_ref"`
	Action       string                 `json:"action"`
	Status       string                 `json:"status"`
	LatencyMs    float64                `json:"latency_ms"`
	StorageTier  string                 `json:"storage_tier"`
	Checksum     string                 `json:"checksum"`
}

func SyncAndLog(ctx context.Context, httpClient *http.Client, webhookURL string, logPath string, payload ArchivePayload, result ArchiveResult) error {
	// Incomplete-data checking
	if result.Success && (payload.CaseRef == "" || result.LatencyMs == 0) {
		return fmt.Errorf("incomplete-data detected during sync pipeline")
	}

	audit := AuditLog{
		Timestamp:   time.Now().UTC().Format(time.RFC3339),
		CaseRef:     payload.CaseRef,
		Action:      "archive_transition",
		Status:      map[bool]string{true: "success", false: "failure"}[result.Success],
		LatencyMs:   result.LatencyMs,
		StorageTier: result.StorageTier,
		Checksum:    fmt.Sprintf("%x", md5.Sum([]byte(payload.CaseRef+result.ErrorMessage))),
	}

	// Write audit log
	f, err := os.OpenFile(logPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
	if err != nil {
		return fmt.Errorf("audit log write failed: %w", err)
	}
	defer f.Close()

	if err := json.NewEncoder(f).Encode(audit); err != nil {
		return fmt.Errorf("audit log serialization failed: %w", err)
	}

	// Webhook synchronization
	webhookPayload := map[string]interface{}{
		"event_type": "case.purged",
		"case_id":    payload.CaseRef,
		"archive_id": uuid.New().String(),
		"status":     audit.Status,
		"timestamp":  audit.Timestamp,
	}

	reqBody, err := json.Marshal(webhookPayload)
	if err != nil {
		return fmt.Errorf("webhook payload marshal failed: %w", err)
	}

	req, err := http.NewRequestWithContext(ctx, http.MethodPost, webhookURL, bytes.NewBuffer(reqBody))
	if err != nil {
		return fmt.Errorf("webhook request creation failed: %w", err)
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("X-Archive-Source", "genesys-automated")

	resp, err := httpClient.Do(req)
	if err != nil {
		return fmt.Errorf("webhook delivery failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return fmt.Errorf("webhook returned status %d", resp.StatusCode)
	}

	return nil
}

Complete Working Example

The following script combines all components into a single executable service. It initializes OAuth, retrieves a closed interaction, validates the archive payload, executes the transition with retry logic, synchronizes via webhook, and writes audit logs. Replace the placeholder credentials and endpoints before execution.

package main

import (
	"bytes"
	"context"
	"crypto/md5"
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"time"

	"github.com/MyPureCloud/platform-client-v2-go/platformclientv2"
	"github.com/google/uuid"
)

func main() {
	ctx := context.Background()

	// Configuration
	oauthConfig := OAuthConfig{
		ClientID:     "YOUR_CLIENT_ID",
		ClientSecret: "YOUR_CLIENT_SECRET",
		BaseURL:      "https://api.mypurecloud.com",
	}
	env := "us-east-1"
	interactionID := "YOUR_INTERACTION_ID"
	webhookURL := "https://your-external-archive.example.com/webhooks/case-purged"
	logPath := "archive_audit.log"
	maxArchiveSize := int64(1048576) // 1 MB

	// Initialize components
	tokenCache := NewTokenCache(oauthConfig)
	apiClient, err := InitGenesysClient(ctx, tokenCache, env)
	if err != nil {
		fmt.Fprintf(os.Stderr, "SDK init failed: %v\n", err)
		os.Exit(1)
	}

	httpClient := &http.Client{Timeout: 15 * time.Second}

	// Build payload
	classifications := map[string]interface{}{
		"case_type":    "support_ticket",
		"priority":     "high",
		"resolution":   "resolved_via_kb",
		"closed_date":  time.Now().UTC().Format(time.RFC3339),
	}

	transition := BuildArchiveTransition(interactionID, classifications)
	payload := ArchivePayload{
		CaseRef:        interactionID,
		DataMatrix:     classifications,
		StoreDirective: "archived",
		EncryptionKey:  "AES256-GCM-PROD-KEY-001",
	}

	// Validate
	if err := ValidateArchivePayload(payload, maxArchiveSize); err != nil {
		fmt.Fprintf(os.Stderr, "Validation failed: %v\n", err)
		os.Exit(1)
	}

	// Execute transition
	result := ExecuteArchiveTransition(ctx, apiClient, interactionID, transition)
	if !result.Success {
		fmt.Fprintf(os.Stderr, "Archive transition failed: %s\n", result.ErrorMessage)
	}

	// Sync and log
	if err := SyncAndLog(ctx, httpClient, webhookURL, logPath, payload, result); err != nil {
		fmt.Fprintf(os.Stderr, "Sync/logging failed: %v\n", err)
		os.Exit(1)
	}

	fmt.Println("Archive workflow completed successfully.")
}

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: Expired OAuth token or invalid client credentials.
• Fix: Verify ClientID and ClientSecret match the Genesys Cloud security profile. Ensure the token cache refreshes before expiration. The GetToken method subtracts 30 seconds from expires_in to prevent edge-case expiration during API calls.
• Code fix: Check the OAuth response body for error_description. Rotate credentials if compromised.

Error: 403 Forbidden

• Cause: Missing OAuth scopes or insufficient user permissions.
• Fix: Grant v2:interaction:read and v2:interaction:write scopes to the OAuth client. Assign the service user the Interaction Administrator or Custom Role with interaction transition permissions.
• Code fix: Verify the configuration.SetAccessToken() call receives a non-empty string. Log the scope claim from the decoded JWT if debugging.

Error: 429 Too Many Requests

• Cause: Rate limit exceeded on the Interaction API.
• Fix: The ExecuteArchiveTransition function implements exponential backoff. Increase maxRetries or add jitter if processing bulk archives. Queue requests using a worker pool instead of fan-out concurrency.
• Code fix: Monitor the Retry-After header. The current implementation uses fixed backoff for simplicity. Replace with header-driven delays in production.

Error: 400 Bad Request

• Cause: Invalid transition target, missing required fields, or payload exceeds size limits.
• Fix: Validate StoreDirective matches allowed lifecycle states. Ensure DataMatrix contains valid classification keys. Verify compression size does not exceed maximum-archive-size.
• Code fix: Parse the Genesys Cloud error response body. It returns a errors array with field-level validation messages.

Official References

• Genesys Cloud Interaction API Documentation
• Platform Client V2 Go SDK
• OAuth 2.0 Client Credentials Flow
• Interaction Lifecycle and Transitions