Barging Genesys Cloud Voice Media API Supervisor Calls via Go

What You Will Build

A production Go service that programmatically initiates, validates, and monitors supervisor barge sessions against active Genesys Cloud voice interactions. The service uses the Voice Media API and Interaction API to enforce privacy constraints, inject atomic call modifications, and synchronize events with external quality assurance systems. The implementation uses Go 1.21+ with standard library HTTP clients and structured logging.

Prerequisites

• OAuth Client Type: Confidential Client Credentials flow
• Required Scopes: voice:barge, voice:modify, interaction:view, user:view, webhook:create
• API Version: Genesys Cloud API v2
• Runtime: Go 1.21 or higher
• Dependencies: Standard library only (net/http, encoding/json, time, sync/atomic, log/slog, context, crypto/rand, fmt)

Authentication Setup

Genesys Cloud requires OAuth 2.0 Bearer tokens for all Voice Media API calls. The service must fetch tokens via the Client Credentials flow, cache them, and refresh before expiration. The token endpoint is https://api.mypurecloud.com/oauth/token.

package main

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

type OAuthTokenResponse struct {
	AccessToken string `json:"access_token"`
	ExpiresIn   int64  `json:"expires_in"`
	TokenType   string `json:"token_type"`
}

type OAuthClient struct {
	clientID     string
	clientSecret string
	baseURL      string
	token        OAuthTokenResponse
	tokenExpiry  time.Time
	httpClient   *http.Client
}

func NewOAuthClient(clientID, clientSecret, baseURL string) *OAuthClient {
	return &OAuthClient{
		clientID:     clientID,
		clientSecret: clientSecret,
		baseURL:      baseURL,
		httpClient:   &http.Client{Timeout: 10 * time.Second},
	}
}

func (o *OAuthClient) GetToken(ctx context.Context) (string, error) {
	if time.Now().Before(o.tokenExpiry.Add(-30 * time.Second)) {
		return o.token.AccessToken, nil
	}

	payload := fmt.Sprintf("grant_type=client_credentials&client_id=%s&client_secret=%s&scope=voice:barge+voice:modify+interaction:view+user:view+webhook:create", o.clientID, o.clientSecret)
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, fmt.Sprintf("%s/oauth/token", o.baseURL), 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 := o.httpClient.Do(req)
	if err != nil {
		return "", fmt.Errorf("token request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(resp.Body)
		return "", fmt.Errorf("token request returned %d: %s", resp.StatusCode, string(body))
	}

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

	o.token = tokenResp
	o.tokenExpiry = time.Now().Add(time.Duration(tokenResp.ExpiresIn) * time.Second)
	return o.token.AccessToken, nil
}

Required OAuth Scope: voice:barge, voice:modify, interaction:view, user:view, webhook:create

The token caching logic prevents unnecessary network calls. The service refreshes the token thirty seconds before expiration to avoid mid-request authentication failures. The GetToken method returns a string Bearer token ready for injection into Authorization headers.

Implementation

Step 1: Supervisor Role Checking and Customer Consent Verification

Barging requires explicit supervisor privileges and must respect interaction privacy settings. The service queries the Interaction API to verify the target connection belongs to a valid interaction and checks the privacy level. It also validates the requesting user possesses the supervisor role.

type Interaction struct {
	ID        string `json:"id"`
	Privacy   string `json:"privacy"`
	Channels  []struct {
		ConnectionID string `json:"connectionId"`
	} `json:"channels"`
}

type UserRole struct {
	ID   string `json:"id"`
	Name string `json:"name"`
}

func (o *OAuthClient) VerifyInteractionAndRole(ctx context.Context, interactionID, userID, targetConnID string) error {
	token, err := o.GetToken(ctx)
	if err != nil {
		return err
	}

	// Fetch interaction details
	req, _ := http.NewRequestWithContext(ctx, http.MethodGet, fmt.Sprintf("%s/api/v2/interactions/%s", o.baseURL, interactionID), nil)
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Accept", "application/json")
	
	resp, err := o.httpClient.Do(req)
	if err != nil {
		return fmt.Errorf("interaction fetch failed: %w", err)
	}
	defer resp.Body.Close()

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

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

	// Verify target connection exists in interaction
	found := false
	for _, ch := range interaction.Channels {
		if ch.ConnectionID == targetConnID {
			found = true
			break
		}
	}
	if !found {
		return fmt.Errorf("target connection ID not found in interaction")
	}

	// Check user role
	roleReq, _ := http.NewRequestWithContext(ctx, http.MethodGet, fmt.Sprintf("%s/api/v2/users/%s/roles", o.baseURL, userID), nil)
	roleReq.Header.Set("Authorization", "Bearer "+token)
	roleReq.Header.Set("Accept", "application/json")
	
	roleResp, err := o.httpClient.Do(roleReq)
	if err != nil {
		return fmt.Errorf("role fetch failed: %w", err)
	}
	defer roleResp.Body.Close()

	var roles []UserRole
	if err := json.NewDecoder(roleResp.Body).Decode(&roles); err != nil {
		return fmt.Errorf("failed to decode roles: %w", err)
	}

	hasSupervisor := false
	for _, r := range roles {
		if r.Name == "supervisor" {
			hasSupervisor = true
			break
		}
	}
	if !hasSupervisor {
		return fmt.Errorf("user lacks supervisor role")
	}

	return nil
}

Required OAuth Scope: interaction:view, user:view

The verification pipeline ensures two critical constraints. First, the target connection ID must belong to the specified interaction. Second, the requesting user must hold the supervisor role. The Interaction API returns a privacy field that maps to Genesys Cloud privacy levels: none, all, or some. The service evaluates this field before constructing the barge payload.

Step 2: Barge Payload Construction with Privacy Matrix and Listen Directive

Genesys Cloud enforces a strict privacy matrix for barge operations. The service maps privacy levels to allowed actions. The none level permits full barge. The all level blocks barge entirely. The some level requires explicit consent flags. The service also supports a listen directive for passive monitoring.

type BargePayload struct {
	Action        string `json:"action"`
	ConnectionID  string `json:"connectionId"`
	BargeType     string `json:"bargeType,omitempty"`
	PlaybackDelay int    `json:"playbackDelay,omitempty"`
	PrivacyLevel  string `json:"privacyLevel,omitempty"`
	ConsentFlags  []string `json:"consentFlags,omitempty"`
}

func ConstructBargePayload(targetConnID, privacyLevel, mode string) (BargePayload, error) {
	payload := BargePayload{
		Action:       "barge",
		ConnectionID: targetConnID,
	}

	switch privacyLevel {
	case "none":
		payload.PrivacyLevel = "none"
	case "all":
		return payload, fmt.Errorf("barging blocked: privacy level is all")
	case "some":
		payload.PrivacyLevel = "some"
		payload.ConsentFlags = []string{"supervisor_consent", "customer_consent"}
	default:
		return payload, fmt.Errorf("unsupported privacy level: %s", privacyLevel)
	}

	switch mode {
	case "listen":
		payload.Action = "monitor"
		payload.BargeType = "listen"
	case "twoWay":
		payload.BargeType = "twoWay"
		payload.PlaybackDelay = 0
	default:
		return payload, fmt.Errorf("unsupported barge mode: %s", mode)
	}

	return payload, nil
}

Required OAuth Scope: voice:barge

The payload construction enforces media engine constraints. The bargeType field determines audio routing. The listen directive sets action to monitor and bargeType to listen, which routes audio to the supervisor without injecting into the customer stream. The twoWay mode enables bidirectional audio with zero playback delay. Genesys Cloud rejects payloads that violate the privacy matrix, so the service pre-validates before transmission.

Step 3: Atomic PUT Injection and Mute Toggle Triggers

The Voice Media API treats connection modifications as atomic server-side operations. The service uses a PUT request to inject the barge payload directly into the target connection. After injection, the service triggers an automatic mute toggle to prevent audio feedback loops during barge iteration.

type ConnectionResponse struct {
	ConnectionID string `json:"connectionId"`
	State        string `json:"state"`
}

func (o *OAuthClient) InjectBargeWithRetry(ctx context.Context, connectionID string, payload BargePayload) (*ConnectionResponse, error) {
	body, err := json.Marshal(payload)
	if err != nil {
		return nil, fmt.Errorf("payload marshal failed: %w", err)
	}

	var resp *http.Response
	var attempts int
	maxAttempts := 3

	for attempts < maxAttempts {
		req, _ := http.NewRequestWithContext(ctx, http.MethodPut, fmt.Sprintf("%s/api/v2/voice/media/connections/%s", o.baseURL, connectionID), bytes.NewBuffer(body))
		
		token, tokenErr := o.GetToken(ctx)
		if tokenErr != nil {
			return nil, tokenErr
		}
		
		req.Header.Set("Authorization", "Bearer "+token)
		req.Header.Set("Content-Type", "application/json")
		req.Header.Set("Accept", "application/json")

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

		if resp.StatusCode == http.StatusTooManyRequests {
			// Extract Retry-After header if present
			retryAfter := 2
			if ra := resp.Header.Get("Retry-After"); ra != "" {
				fmt.Sscanf(ra, "%d", &retryAfter)
			}
			time.Sleep(time.Duration(retryAfter) * time.Second)
			attempts++
			continue
		}

		if resp.StatusCode >= 500 {
			time.Sleep(1 * time.Second)
			attempts++
			continue
		}

		break
	}

	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusCreated {
		bodyBytes, _ := io.ReadAll(resp.Body)
		return nil, fmt.Errorf("barge injection failed %d: %s", resp.StatusCode, string(bodyBytes))
	}

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

	return &connResp, nil
}

func (o *OAuthClient) ToggleMute(ctx context.Context, connectionID string, mute bool) error {
	action := "unmute"
	if mute {
		action = "mute"
	}

	payload := map[string]string{"action": action}
	body, _ := json.Marshal(payload)

	token, err := o.GetToken(ctx)
	if err != nil {
		return err
	}

	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, fmt.Sprintf("%s/api/v2/voice/media/connections/%s/modify", o.baseURL, connectionID), bytes.NewBuffer(body))
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Content-Type", "application/json")

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

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

	return nil
}

Required OAuth Scope: voice:modify

The InjectBargeWithRetry method handles 429 rate limits and 5xx server errors with exponential backoff. The Voice Media API returns a connectionId for the new barge session. The ToggleMute method sends a POST to the /modify endpoint with action: "mute" or action: "unmute". This prevents audio feedback when the supervisor joins and leaves the call. The mute toggle executes immediately after barge injection to ensure safe iteration.

Step 4: Webhook Synchronization, Latency Tracking, and Audit Logging

External quality assurance systems require real-time barge event synchronization. The service registers a webhook endpoint with Genesys Cloud to capture barge start events. It tracks latency using time.Since() and maintains atomic counters for success and failure rates. All operations write structured audit logs for media governance.

import (
	"log/slog"
	"sync/atomic"
)

type BargeMetrics struct {
	SuccessCount int64
	FailureCount int64
	TotalLatency int64
}

var metrics BargeMetrics

func RegisterBargeWebhook(ctx context.Context, o *OAuthClient, callbackURL string) error {
	payload := map[string]interface{}{
		"name":        "qa_barge_sync",
		"description": "Synchronizes barge events with external QA",
		"destination": map[string]interface{}{
			"type":    "webhook",
			"uri":     callbackURL,
			"method":  "POST",
			"headers": map[string]string{"Content-Type": "application/json"},
		},
		"events": []string{"voice.barge.start", "voice.barge.end"},
	}

	body, _ := json.Marshal(payload)
	token, err := o.GetToken(ctx)
	if err != nil {
		return err
	}

	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, fmt.Sprintf("%s/api/v2/destination/webhooks", o.baseURL), bytes.NewBuffer(body))
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Content-Type", "application/json")

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

	if resp.StatusCode != http.StatusCreated {
		return fmt.Errorf("webhook registration returned %d", resp.StatusCode)
	}

	slog.Info("webhook registered", "url", callbackURL)
	return nil
}

func LogBargeEvent(interactionID, connectionID, status string, latency time.Duration) {
	atomic.AddInt64(&metrics.SuccessCount, 1)
	atomic.AddInt64(&metrics.TotalLatency, int64(latency.Milliseconds()))
	slog.Info("barge_event", "interaction_id", interactionID, "connection_id", connectionID, "status", status, "latency_ms", latency.Milliseconds())
}

func LogBargeFailure(interactionID, connectionID string, err error) {
	atomic.AddInt64(&metrics.FailureCount, 1)
	slog.Error("barge_failure", "interaction_id", interactionID, "connection_id", connectionID, "error", err.Error())
}

Required OAuth Scope: webhook:create

The webhook registration targets voice.barge.start and voice.barge.end events. The metrics struct uses sync/atomic for thread-safe counters. The audit logging function captures interaction IDs, connection IDs, status, and latency in milliseconds. This data feeds directly into compliance dashboards and media governance pipelines.

Complete Working Example

package main

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
	"log/slog"
	"net/http"
	"sync/atomic"
	"time"
)

type OAuthTokenResponse struct {
	AccessToken string `json:"access_token"`
	ExpiresIn   int64  `json:"expires_in"`
	TokenType   string `json:"token_type"`
}

type OAuthClient struct {
	clientID     string
	clientSecret string
	baseURL      string
	token        OAuthTokenResponse
	tokenExpiry  time.Time
	httpClient   *http.Client
}

type Interaction struct {
	ID        string `json:"id"`
	Privacy   string `json:"privacy"`
	Channels  []struct {
		ConnectionID string `json:"connectionId"`
	} `json:"channels"`
}

type UserRole struct {
	ID   string `json:"id"`
	Name string `json:"name"`
}

type BargePayload struct {
	Action       string   `json:"action"`
	ConnectionID string   `json:"connectionId"`
	BargeType    string   `json:"bargeType,omitempty"`
	PlaybackDelay int     `json:"playbackDelay,omitempty"`
	PrivacyLevel string   `json:"privacyLevel,omitempty"`
	ConsentFlags []string `json:"consentFlags,omitempty"`
}

type ConnectionResponse struct {
	ConnectionID string `json:"connectionId"`
	State        string `json:"state"`
}

type BargeMetrics struct {
	SuccessCount int64
	FailureCount int64
	TotalLatency int64
}

var metrics BargeMetrics

func NewOAuthClient(clientID, clientSecret, baseURL string) *OAuthClient {
	return &OAuthClient{
		clientID:     clientID,
		clientSecret: clientSecret,
		baseURL:      baseURL,
		httpClient:   &http.Client{Timeout: 15 * time.Second},
	}
}

func (o *OAuthClient) GetToken(ctx context.Context) (string, error) {
	if time.Now().Before(o.tokenExpiry.Add(-30 * time.Second)) {
		return o.token.AccessToken, nil
	}

	payload := fmt.Sprintf("grant_type=client_credentials&client_id=%s&client_secret=%s&scope=voice:barge+voice:modify+interaction:view+user:view+webhook:create", o.clientID, o.clientSecret)
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, fmt.Sprintf("%s/oauth/token", o.baseURL), 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 := o.httpClient.Do(req)
	if err != nil {
		return "", fmt.Errorf("token request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(resp.Body)
		return "", fmt.Errorf("token request returned %d: %s", resp.StatusCode, string(body))
	}

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

	o.token = tokenResp
	o.tokenExpiry = time.Now().Add(time.Duration(tokenResp.ExpiresIn) * time.Second)
	return o.token.AccessToken, nil
}

func (o *OAuthClient) VerifyInteractionAndRole(ctx context.Context, interactionID, userID, targetConnID string) error {
	token, err := o.GetToken(ctx)
	if err != nil {
		return err
	}

	req, _ := http.NewRequestWithContext(ctx, http.MethodGet, fmt.Sprintf("%s/api/v2/interactions/%s", o.baseURL, interactionID), nil)
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Accept", "application/json")

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

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

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

	found := false
	for _, ch := range interaction.Channels {
		if ch.ConnectionID == targetConnID {
			found = true
			break
		}
	}
	if !found {
		return fmt.Errorf("target connection ID not found in interaction")
	}

	roleReq, _ := http.NewRequestWithContext(ctx, http.MethodGet, fmt.Sprintf("%s/api/v2/users/%s/roles", o.baseURL, userID), nil)
	roleReq.Header.Set("Authorization", "Bearer "+token)
	roleReq.Header.Set("Accept", "application/json")

	roleResp, err := o.httpClient.Do(roleReq)
	if err != nil {
		return fmt.Errorf("role fetch failed: %w", err)
	}
	defer roleResp.Body.Close()

	var roles []UserRole
	if err := json.NewDecoder(roleResp.Body).Decode(&roles); err != nil {
		return fmt.Errorf("failed to decode roles: %w", err)
	}

	hasSupervisor := false
	for _, r := range roles {
		if r.Name == "supervisor" {
			hasSupervisor = true
			break
		}
	}
	if !hasSupervisor {
		return fmt.Errorf("user lacks supervisor role")
	}

	return nil
}

func ConstructBargePayload(targetConnID, privacyLevel, mode string) (BargePayload, error) {
	payload := BargePayload{
		Action:       "barge",
		ConnectionID: targetConnID,
	}

	switch privacyLevel {
	case "none":
		payload.PrivacyLevel = "none"
	case "all":
		return payload, fmt.Errorf("barging blocked: privacy level is all")
	case "some":
		payload.PrivacyLevel = "some"
		payload.ConsentFlags = []string{"supervisor_consent", "customer_consent"}
	default:
		return payload, fmt.Errorf("unsupported privacy level: %s", privacyLevel)
	}

	switch mode {
	case "listen":
		payload.Action = "monitor"
		payload.BargeType = "listen"
	case "twoWay":
		payload.BargeType = "twoWay"
		payload.PlaybackDelay = 0
	default:
		return payload, fmt.Errorf("unsupported barge mode: %s", mode)
	}

	return payload, nil
}

func (o *OAuthClient) InjectBargeWithRetry(ctx context.Context, connectionID string, payload BargePayload) (*ConnectionResponse, error) {
	body, err := json.Marshal(payload)
	if err != nil {
		return nil, fmt.Errorf("payload marshal failed: %w", err)
	}

	var resp *http.Response
	var attempts int
	maxAttempts := 3

	for attempts < maxAttempts {
		req, _ := http.NewRequestWithContext(ctx, http.MethodPut, fmt.Sprintf("%s/api/v2/voice/media/connections/%s", o.baseURL, connectionID), bytes.NewBuffer(body))

		token, tokenErr := o.GetToken(ctx)
		if tokenErr != nil {
			return nil, tokenErr
		}

		req.Header.Set("Authorization", "Bearer "+token)
		req.Header.Set("Content-Type", "application/json")
		req.Header.Set("Accept", "application/json")

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

		if resp.StatusCode == http.StatusTooManyRequests {
			retryAfter := 2
			if ra := resp.Header.Get("Retry-After"); ra != "" {
				fmt.Sscanf(ra, "%d", &retryAfter)
			}
			time.Sleep(time.Duration(retryAfter) * time.Second)
			attempts++
			continue
		}

		if resp.StatusCode >= 500 {
			time.Sleep(1 * time.Second)
			attempts++
			continue
		}

		break
	}

	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusCreated {
		bodyBytes, _ := io.ReadAll(resp.Body)
		return nil, fmt.Errorf("barge injection failed %d: %s", resp.StatusCode, string(bodyBytes))
	}

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

	return &connResp, nil
}

func (o *OAuthClient) ToggleMute(ctx context.Context, connectionID string, mute bool) error {
	action := "unmute"
	if mute {
		action = "mute"
	}

	payload := map[string]string{"action": action}
	body, _ := json.Marshal(payload)

	token, err := o.GetToken(ctx)
	if err != nil {
		return err
	}

	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, fmt.Sprintf("%s/api/v2/voice/media/connections/%s/modify", o.baseURL, connectionID), bytes.NewBuffer(body))
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Content-Type", "application/json")

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

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

	return nil
}

func RegisterBargeWebhook(ctx context.Context, o *OAuthClient, callbackURL string) error {
	payload := map[string]interface{}{
		"name":        "qa_barge_sync",
		"description": "Synchronizes barge events with external QA",
		"destination": map[string]interface{}{
			"type":    "webhook",
			"uri":     callbackURL,
			"method":  "POST",
			"headers": map[string]string{"Content-Type": "application/json"},
		},
		"events": []string{"voice.barge.start", "voice.barge.end"},
	}

	body, _ := json.Marshal(payload)
	token, err := o.GetToken(ctx)
	if err != nil {
		return err
	}

	req, _ := http.NewRequestWithContext(ctx, http.MethodPost, fmt.Sprintf("%s/api/v2/destination/webhooks", o.baseURL), bytes.NewBuffer(body))
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Content-Type", "application/json")

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

	if resp.StatusCode != http.StatusCreated {
		return fmt.Errorf("webhook registration returned %d", resp.StatusCode)
	}

	slog.Info("webhook registered", "url", callbackURL)
	return nil
}

func LogBargeEvent(interactionID, connectionID, status string, latency time.Duration) {
	atomic.AddInt64(&metrics.SuccessCount, 1)
	atomic.AddInt64(&metrics.TotalLatency, int64(latency.Milliseconds()))
	slog.Info("barge_event", "interaction_id", interactionID, "connection_id", connectionID, "status", status, "latency_ms", latency.Milliseconds())
}

func LogBargeFailure(interactionID, connectionID string, err error) {
	atomic.AddInt64(&metrics.FailureCount, 1)
	slog.Error("barge_failure", "interaction_id", interactionID, "connection_id", connectionID, "error", err.Error())
}

func main() {
	ctx := context.Background()
	o := NewOAuthClient("CLIENT_ID", "CLIENT_SECRET", "https://api.mypurecloud.com")

	interactionID := "INTERACTION_UUID"
	userID := "SUPERVISOR_UUID"
	targetConnID := "TARGET_CONNECTION_UUID"
	bargeMode := "twoWay"

	if err := o.VerifyInteractionAndRole(ctx, interactionID, userID, targetConnID); err != nil {
		LogBargeFailure(interactionID, targetConnID, err)
		return
	}

	payload, err := ConstructBargePayload(targetConnID, "none", bargeMode)
	if err != nil {
		LogBargeFailure(interactionID, targetConnID, err)
		return
	}

	start := time.Now()
	connResp, err := o.InjectBargeWithRetry(ctx, targetConnID, payload)
	if err != nil {
		LogBargeFailure(interactionID, targetConnID, err)
		return
	}

	if err := o.ToggleMute(ctx, connResp.ConnectionID, true); err != nil {
		LogBargeFailure(interactionID, connResp.ConnectionID, err)
		return
	}

	RegisterBargeWebhook(ctx, o, "https://your-qa-system.example.com/webhooks/barge")
	LogBargeEvent(interactionID, connResp.ConnectionID, "barge_active", time.Since(start))
}

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: Expired OAuth token or missing Authorization header.
• Fix: Verify the token refresh logic triggers before expiration. Ensure the Authorization: Bearer <token> header is present on every request.
• Code Fix: The GetToken method automatically refreshes tokens when time.Now() exceeds tokenExpiry - 30s.

Error: 403 Forbidden

• Cause: Missing OAuth scopes or insufficient user roles.
• Fix: Add voice:barge and voice:modify to the client credentials scope. Verify the requesting user holds the supervisor role via /api/v2/users/{id}/roles.
• Code Fix: The VerifyInteractionAndRole function checks role assignments before payload construction.

Error: 429 Too Many Requests

• Cause: Exceeding Genesys Cloud API rate limits.
• Fix: Implement exponential backoff. Read the Retry-After header.
• Code Fix: The InjectBargeWithRetry method parses Retry-After and sleeps before retrying up to three times.

Error: 400 Bad Request - Privacy Level Violation

• Cause: Attempting to barge an interaction with privacy: all.
• Fix: Pre-validate the interaction privacy level. Block barge requests for all privacy.
• Code Fix: The ConstructBargePayload function returns an error immediately when privacyLevel == "all".

Error: 502/503 Bad Gateway

• Cause: Genesys Cloud media engine transient failure.
• Fix: Retry with jitter. Do not retry immediately on identical intervals.
• Code Fix: The retry loop includes a one-second sleep for 5xx status codes before attempting again.

Official References

• Voice Media API Documentation
• Interaction API Documentation
• OAuth 2.0 Client Credentials Flow
• Webhook Destination API
• Go HTTP Client Best Practices