Enriching Genesys Cloud Data Actions API Real-Time Records with Go

What You Will Build

• A Go service that constructs and executes Genesys Cloud Data Actions payloads containing record references, attribute matrices, and GraphQL fetch directives.
• The implementation uses the Genesys Cloud REST API surface (/api/v2/dataactions/{id}/execute, /api/v2/oauth/token, /api/v2/platform/webhooks) with explicit timeout, retry, and validation logic.
• The programming language covered is Go 1.21+, utilizing net/http, context, encoding/json, log/slog, and github.com/santhosh-tekuri/jsonschema/v5.

Prerequisites

• OAuth 2.0 Client Credentials flow with a Genesys Cloud API client configured for dataactions:execute, dataactions:read, webhooks:write, and oauth:auth scopes.
• Genesys Cloud API v2 endpoints. No proprietary SDK is required; raw HTTP calls are used for maximum transparency and control.
• Go 1.21 or later installed on the host system.
• External dependencies managed via go get github.com/santhosh-tekuri/jsonschema/v5 and standard library packages only.

Authentication Setup

Genesys Cloud requires a bearer token for every API call. The client credentials flow returns a short-lived token that must be cached and refreshed before expiration. The following code handles token acquisition, in-memory caching, and automatic retry on 429 rate limits.

package main

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

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

type TokenCache struct {
	Token     string
	ExpiresAt time.Time
}

var cache TokenCache

func fetchToken(ctx context.Context, client *http.Client) (string, error) {
	if cache.Token != "" && time.Now().Before(cache.ExpiresAt.Add(-30*time.Second)) {
		return cache.Token, nil
	}

	payload := map[string]string{
		"grant_type": "client_credentials",
		"client_id":  os.Getenv("GENESYS_CLIENT_ID"),
		"client_secret": os.Getenv("GENESYS_CLIENT_SECRET"),
		"scope":      "dataactions:execute dataactions:read webhooks:write",
	}

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

	req, err := http.NewRequestWithContext(ctx, http.MethodPost, "https://api.mypurecloud.com/api/v2/oauth/token", bytes.NewBuffer(jsonBody))
	if err != nil {
		return "", fmt.Errorf("token request creation failed: %w", err)
	}
	req.Header.Set("Content-Type", "application/json")

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

	if resp.StatusCode == http.StatusTooManyRequests {
		retryAfter := 5
		if ra := resp.Header.Get("Retry-After"); ra != "" {
			fmt.Sscanf(ra, "%d", &retryAfter)
		}
		time.Sleep(time.Duration(retryAfter) * time.Second)
		return fetchToken(ctx, client)
	}

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

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

	cache.Token = tokenResp.AccessToken
	cache.ExpiresAt = time.Now().Add(time.Duration(tokenResp.ExpiresIn) * time.Second)
	return cache.Token, nil
}

Implementation

Step 1: Construct Enrichment Payload with Record Reference, Attribute Matrix, and Fetch Directive

The Data Actions API expects a JSON body containing interaction context. The payload must include a record reference, an attribute matrix for field mapping, and a fetch directive that specifies the external data source. The fetch directive here contains a GraphQL query string that the Data Action will forward to an external GraphQL endpoint.

type EnrichmentPayload struct {
	RecordReference map[string]string `json:"recordReference"`
	AttributeMatrix map[string]any    `json:"attributeMatrix"`
	FetchDirective  map[string]string `json:"fetchDirective"`
}

func buildEnrichmentPayload(interactionID string, externalGraphQLURL string) EnrichmentPayload {
	return EnrichmentPayload{
		RecordReference: map[string]string{
			"interactionId": interactionID,
			"sourceSystem":  "genesys-cloud",
			"timestamp":     time.Now().UTC().Format(time.RFC3339),
		},
		AttributeMatrix: map[string]any{
			"customerEmail": "${interaction.attributes.email}",
			"sessionId":     "${interaction.id}",
			"channelType":   "voice",
		},
		FetchDirective: map[string]string{
			"endpoint": externalGraphQLURL,
			"method":   "POST",
			"query": `{
				enrichment(input: {email: "${customerEmail}"}) {
					customerId
					tier
					riskScore
					lastInteraction
				}
			}`,
		},
	}
}

Step 2: Validate Schemas Against Network Constraints and Timeout Limits

Before execution, the payload must pass schema validation. Network constraints and timeout limits are enforced via Go’s context and http.Client. The timeout duration must not exceed Genesys Cloud’s maximum execution window (typically 15 seconds for real-time actions).

import (
	"github.com/santhosh-tekuri/jsonschema/v5"
)

var payloadSchema = `
{
  "type": "object",
  "required": ["recordReference", "attributeMatrix", "fetchDirective"],
  "properties": {
    "recordReference": {"type": "object"},
    "attributeMatrix": {"type": "object"},
    "fetchDirective": {
      "type": "object",
      "required": ["endpoint", "method", "query"],
      "properties": {
        "endpoint": {"type": "string", "format": "uri"},
        "method": {"type": "string", "enum": ["GET", "POST"]},
        "query": {"type": "string", "minLength": 1}
      }
    }
  }
}
`

func validatePayload(payload EnrichmentPayload) error {
	compiled, err := jsonschema.CompileString("payload.json", payloadSchema)
	if err != nil {
		return fmt.Errorf("schema compilation failed: %w", err)
	}

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

	var decoder json.Decoder
	decoder = json.NewDecoder(bytes.NewReader(jsonData))
	if err := compiled.Validate(decoder); err != nil {
		return fmt.Errorf("payload validation failed: %w", err)
	}
	return nil
}

func createSecureClient(maxTimeout time.Duration) *http.Client {
	if maxTimeout > 15*time.Second {
		maxTimeout = 15 * time.Second
	}
	return &http.Client{
		Timeout: maxTimeout,
		Transport: &http.Transport{
			MaxIdleConns:        10,
			IdleConnTimeout:     30 * time.Second,
			TLSHandshakeTimeout: 5 * time.Second,
		},
	}
}

Step 3: Execute Data Action with GraphQL Query Construction and Response Parsing

The Data Action execution uses an atomic GET operation to fetch the external GraphQL schema for verification, then performs a POST to /api/v2/dataactions/{id}/execute. The response parsing extracts the enriched fields and applies automatic field update triggers with safe iteration bounds.

type DataActionResponse struct {
	Data map[string]any `json:"data"`
	Meta map[string]any `json:"meta"`
}

func fetchGraphQLSchema(ctx context.Context, client *http.Client, endpoint string) error {
	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
	if err != nil {
		return fmt.Errorf("schema request creation failed: %w", err)
	}
	req.Header.Set("Accept", "application/json")

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

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

func executeDataAction(ctx context.Context, client *http.Client, token string, actionID string, payload EnrichmentPayload) (DataActionResponse, error) {
	jsonBody, err := json.Marshal(payload)
	if err != nil {
		return DataActionResponse{}, fmt.Errorf("execute payload marshal failed: %w", err)
	}

	endpoint := fmt.Sprintf("https://api.mypurecloud.com/api/v2/dataactions/%s/execute", actionID)
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint, bytes.NewBuffer(jsonBody))
	if err != nil {
		return DataActionResponse{}, fmt.Errorf("execute request creation failed: %w", err)
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", "Bearer "+token)

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

	if resp.StatusCode == http.StatusTooManyRequests {
		time.Sleep(2 * time.Second)
		return executeDataAction(ctx, client, token, actionID, payload)
	}

	if resp.StatusCode != http.StatusOK {
		return DataActionResponse{}, fmt.Errorf("execute failed with status %d", resp.StatusCode)
	}

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

func applyFieldUpdates(response DataActionResponse, maxIterations int) map[string]any {
	updates := make(map[string]any)
	if response.Data == nil {
		return updates
	}

	safeIter := 0
	for key, value := range response.Data {
		if safeIter >= maxIterations {
			break
		}
		if strVal, ok := value.(string); ok && len(strVal) > 0 {
			updates[key] = strVal
		}
		safeIter++
	}
	return updates
}

Step 4: Implement Data Freshness, Schema Drift Verification, and Metrics Tracking

Real-time enrichment requires data freshness validation and schema drift detection. The following logic checks timestamps against a staleness threshold, verifies expected fields exist in the response, tracks latency and success rates, and generates structured audit logs.

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

type Metrics struct {
	LatencySum  float64
	SuccessCount int64
	FailureCount int64
}

func (m *Metrics) RecordLatency(ms float64) {
	atomic.AddFloat64(&m.LatencySum, ms)
}

func (m *Metrics) RecordSuccess() {
	atomic.AddInt64(&m.SuccessCount, 1)
}

func (m *Metrics) RecordFailure() {
	atomic.AddInt64(&m.FailureCount, 1)
}

type AuditEntry struct {
	Timestamp string      `json:"timestamp"`
	ActionID  string      `json:"actionId"`
	Status    string      `json:"status"`
	LatencyMs float64     `json:"latencyMs"`
	Fields    map[string]any `json:"fields"`
}

func verifyDataFreshness(recordRef map[string]string, maxAge time.Duration) error {
	tsStr := recordRef["timestamp"]
	ts, err := time.Parse(time.RFC3339, tsStr)
	if err != nil {
		return fmt.Errorf("timestamp parse failed: %w", err)
	}
	if time.Since(ts) > maxAge {
		return fmt.Errorf("data stale by %v", time.Since(ts))
	}
	return nil
}

func verifySchemaDrift(response DataActionResponse, expectedFields []string) error {
	if response.Data == nil {
		return fmt.Errorf("response data is nil")
	}
	for _, field := range expectedFields {
		if _, exists := response.Data[field]; !exists {
			return fmt.Errorf("schema drift detected: missing field %s", field)
		}
	}
	return nil
}

func generateAuditLog(actionID string, status string, latencyMs float64, fields map[string]any) AuditEntry {
	return AuditEntry{
		Timestamp: time.Now().UTC().Format(time.RFC3339),
		ActionID:  actionID,
		Status:    status,
		LatencyMs: latencyMs,
		Fields:    fields,
	}
}

func syncToDataLake(ctx context.Context, client *http.Client, token string, webhookURL string, audit AuditEntry) error {
	jsonBody, _ := json.Marshal(audit)
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, webhookURL, bytes.NewBuffer(jsonBody))
	if err != nil {
		return fmt.Errorf("webhook request creation failed: %w", err)
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", "Bearer "+token)

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

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

Step 5: Expose Record Enricher Service for Automated Genesys Cloud Management

The final component wraps the logic in an HTTP server that accepts enrichment requests, applies validation, executes the Data Action, tracks metrics, and returns structured results. This exposes a programmatic interface for automated Genesys Cloud management.

type EnrichRequest struct {
	InteractionID string `json:"interactionId"`
	ActionID      string `json:"actionId"`
	ExternalURL   string `json:"externalUrl"`
}

type EnrichResponse struct {
	Success  bool           `json:"success"`
	Updates  map[string]any `json:"updates"`
	Audit    AuditEntry     `json:"audit"`
	Metrics  Metrics        `json:"metrics"`
}

var globalMetrics Metrics

func handleEnrich(w http.ResponseWriter, r *http.Request) {
	var req EnrichRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "invalid request body", http.StatusBadRequest)
		return
	}

	ctx, cancel := context.WithTimeout(r.Context(), 14*time.Second)
	defer cancel()

	client := createSecureClient(14 * time.Second)
	token, err := fetchToken(ctx, client)
	if err != nil {
		http.Error(w, "authentication failed", http.StatusUnauthorized)
		return
	}

	payload := buildEnrichmentPayload(req.InteractionID, req.ExternalURL)
	if err := validatePayload(payload); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	if err := verifyDataFreshness(payload.RecordReference, 5*time.Minute); err != nil {
		http.Error(w, err.Error(), http.StatusGone)
		return
	}

	if err := fetchGraphQLSchema(ctx, client, req.ExternalURL); err != nil {
		http.Error(w, "graphql schema verification failed", http.StatusBadGateway)
		return
	}

	start := time.Now()
	resp, err := executeDataAction(ctx, client, token, req.ActionID, payload)
	latency := float64(time.Since(start).Milliseconds())

	if err != nil {
		globalMetrics.RecordFailure()
		audit := generateAuditLog(req.ActionID, "failed", latency, nil)
		syncToDataLake(ctx, client, token, os.Getenv("DATA_LAKE_WEBHOOK"), audit)
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	if err := verifySchemaDrift(resp, []string{"customerId", "tier", "riskScore"}); err != nil {
		globalMetrics.RecordFailure()
		audit := generateAuditLog(req.ActionID, "schema_drift", latency, resp.Data)
		syncToDataLake(ctx, client, token, os.Getenv("DATA_LAKE_WEBHOOK"), audit)
		http.Error(w, err.Error(), http.StatusConflict)
		return
	}

	updates := applyFieldUpdates(resp, 10)
	globalMetrics.RecordLatency(latency)
	globalMetrics.RecordSuccess()

	audit := generateAuditLog(req.ActionID, "success", latency, updates)
	syncToDataLake(ctx, client, token, os.Getenv("DATA_LAKE_WEBHOOK"), audit)

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(EnrichResponse{
		Success: true,
		Updates: updates,
		Audit:   audit,
		Metrics: globalMetrics,
	})
}

func main() {
	http.HandleFunc("/enrich", handleEnrich)
	slog.Info("enricher service listening on :8080")
	http.ListenAndServe(":8080", nil)
}

Complete Working Example

The following module combines all components into a runnable service. Set the environment variables GENESYS_CLIENT_ID, GENESYS_CLIENT_SECRET, and DATA_LAKE_WEBHOOK before execution.

package main

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"log/slog"
	"net/http"
	"os"
	"time"

	"github.com/santhosh-tekuri/jsonschema/v5"
)

// Models and types from previous steps are included here for completeness
type OAuthTokenResponse struct {
	AccessToken string `json:"access_token"`
	ExpiresIn   int    `json:"expires_in"`
	TokenType   string `json:"token_type"`
}

type TokenCache struct {
	Token     string
	ExpiresAt time.Time
}

var cache TokenCache

type EnrichmentPayload struct {
	RecordReference map[string]string `json:"recordReference"`
	AttributeMatrix map[string]any    `json:"attributeMatrix"`
	FetchDirective  map[string]string `json:"fetchDirective"`
}

type DataActionResponse struct {
	Data map[string]any `json:"data"`
	Meta map[string]any `json:"meta"`
}

type Metrics struct {
	LatencySum   float64
	SuccessCount int64
	FailureCount int64
}

type AuditEntry struct {
	Timestamp string         `json:"timestamp"`
	ActionID  string         `json:"actionId"`
	Status    string         `json:"status"`
	LatencyMs float64        `json:"latencyMs"`
	Fields    map[string]any `json:"fields"`
}

type EnrichRequest struct {
	InteractionID string `json:"interactionId"`
	ActionID      string `json:"actionId"`
	ExternalURL   string `json:"externalUrl"`
}

type EnrichResponse struct {
	Success bool           `json:"success"`
	Updates map[string]any `json:"updates"`
	Audit   AuditEntry     `json:"audit"`
	Metrics Metrics        `json:"metrics"`
}

var globalMetrics Metrics

var payloadSchema = `
{
  "type": "object",
  "required": ["recordReference", "attributeMatrix", "fetchDirective"],
  "properties": {
    "recordReference": {"type": "object"},
    "attributeMatrix": {"type": "object"},
    "fetchDirective": {
      "type": "object",
      "required": ["endpoint", "method", "query"],
      "properties": {
        "endpoint": {"type": "string", "format": "uri"},
        "method": {"type": "string", "enum": ["GET", "POST"]},
        "query": {"type": "string", "minLength": 1}
      }
    }
  }
}
`

func fetchToken(ctx context.Context, client *http.Client) (string, error) {
	if cache.Token != "" && time.Now().Before(cache.ExpiresAt.Add(-30*time.Second)) {
		return cache.Token, nil
	}

	payload := map[string]string{
		"grant_type":    "client_credentials",
		"client_id":     os.Getenv("GENESYS_CLIENT_ID"),
		"client_secret": os.Getenv("GENESYS_CLIENT_SECRET"),
		"scope":         "dataactions:execute dataactions:read webhooks:write",
	}

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

	req, err := http.NewRequestWithContext(ctx, http.MethodPost, "https://api.mypurecloud.com/api/v2/oauth/token", bytes.NewBuffer(jsonBody))
	if err != nil {
		return "", fmt.Errorf("token request creation failed: %w", err)
	}
	req.Header.Set("Content-Type", "application/json")

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

	if resp.StatusCode == http.StatusTooManyRequests {
		retryAfter := 5
		if ra := resp.Header.Get("Retry-After"); ra != "" {
			fmt.Sscanf(ra, "%d", &retryAfter)
		}
		time.Sleep(time.Duration(retryAfter) * time.Second)
		return fetchToken(ctx, client)
	}

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

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

	cache.Token = tokenResp.AccessToken
	cache.ExpiresAt = time.Now().Add(time.Duration(tokenResp.ExpiresIn) * time.Second)
	return cache.Token, nil
}

func buildEnrichmentPayload(interactionID string, externalGraphQLURL string) EnrichmentPayload {
	return EnrichmentPayload{
		RecordReference: map[string]string{
			"interactionId": interactionID,
			"sourceSystem":  "genesys-cloud",
			"timestamp":     time.Now().UTC().Format(time.RFC3339),
		},
		AttributeMatrix: map[string]any{
			"customerEmail": "${interaction.attributes.email}",
			"sessionId":     "${interaction.id}",
			"channelType":   "voice",
		},
		FetchDirective: map[string]string{
			"endpoint": externalGraphQLURL,
			"method":   "POST",
			"query": `{
				enrichment(input: {email: "${customerEmail}"}) {
					customerId
					tier
					riskScore
					lastInteraction
				}
			}`,
		},
	}
}

func validatePayload(payload EnrichmentPayload) error {
	compiled, err := jsonschema.CompileString("payload.json", payloadSchema)
	if err != nil {
		return fmt.Errorf("schema compilation failed: %w", err)
	}

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

	var decoder json.Decoder
	decoder = json.NewDecoder(bytes.NewReader(jsonData))
	if err := compiled.Validate(decoder); err != nil {
		return fmt.Errorf("payload validation failed: %w", err)
	}
	return nil
}

func createSecureClient(maxTimeout time.Duration) *http.Client {
	if maxTimeout > 15*time.Second {
		maxTimeout = 15 * time.Second
	}
	return &http.Client{
		Timeout: maxTimeout,
		Transport: &http.Transport{
			MaxIdleConns:        10,
			IdleConnTimeout:     30 * time.Second,
			TLSHandshakeTimeout: 5 * time.Second,
		},
	}
}

func fetchGraphQLSchema(ctx context.Context, client *http.Client, endpoint string) error {
	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
	if err != nil {
		return fmt.Errorf("schema request creation failed: %w", err)
	}
	req.Header.Set("Accept", "application/json")

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

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

func executeDataAction(ctx context.Context, client *http.Client, token string, actionID string, payload EnrichmentPayload) (DataActionResponse, error) {
	jsonBody, err := json.Marshal(payload)
	if err != nil {
		return DataActionResponse{}, fmt.Errorf("execute payload marshal failed: %w", err)
	}

	endpoint := fmt.Sprintf("https://api.mypurecloud.com/api/v2/dataactions/%s/execute", actionID)
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint, bytes.NewBuffer(jsonBody))
	if err != nil {
		return DataActionResponse{}, fmt.Errorf("execute request creation failed: %w", err)
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", "Bearer "+token)

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

	if resp.StatusCode == http.StatusTooManyRequests {
		time.Sleep(2 * time.Second)
		return executeDataAction(ctx, client, token, actionID, payload)
	}

	if resp.StatusCode != http.StatusOK {
		return DataActionResponse{}, fmt.Errorf("execute failed with status %d", resp.StatusCode)
	}

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

func applyFieldUpdates(response DataActionResponse, maxIterations int) map[string]any {
	updates := make(map[string]any)
	if response.Data == nil {
		return updates
	}

	safeIter := 0
	for key, value := range response.Data {
		if safeIter >= maxIterations {
			break
		}
		if strVal, ok := value.(string); ok && len(strVal) > 0 {
			updates[key] = strVal
		}
		safeIter++
	}
	return updates
}

func verifyDataFreshness(recordRef map[string]string, maxAge time.Duration) error {
	tsStr := recordRef["timestamp"]
	ts, err := time.Parse(time.RFC3339, tsStr)
	if err != nil {
		return fmt.Errorf("timestamp parse failed: %w", err)
	}
	if time.Since(ts) > maxAge {
		return fmt.Errorf("data stale by %v", time.Since(ts))
	}
	return nil
}

func verifySchemaDrift(response DataActionResponse, expectedFields []string) error {
	if response.Data == nil {
		return fmt.Errorf("response data is nil")
	}
	for _, field := range expectedFields {
		if _, exists := response.Data[field]; !exists {
			return fmt.Errorf("schema drift detected: missing field %s", field)
		}
	}
	return nil
}

func generateAuditLog(actionID string, status string, latencyMs float64, fields map[string]any) AuditEntry {
	return AuditEntry{
		Timestamp: time.Now().UTC().Format(time.RFC3339),
		ActionID:  actionID,
		Status:    status,
		LatencyMs: latencyMs,
		Fields:    fields,
	}
}

func syncToDataLake(ctx context.Context, client *http.Client, token string, webhookURL string, audit AuditEntry) error {
	jsonBody, _ := json.Marshal(audit)
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, webhookURL, bytes.NewBuffer(jsonBody))
	if err != nil {
		return fmt.Errorf("webhook request creation failed: %w", err)
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", "Bearer "+token)

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

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

func handleEnrich(w http.ResponseWriter, r *http.Request) {
	var req EnrichRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "invalid request body", http.StatusBadRequest)
		return
	}

	ctx, cancel := context.WithTimeout(r.Context(), 14*time.Second)
	defer cancel()

	client := createSecureClient(14 * time.Second)
	token, err := fetchToken(ctx, client)
	if err != nil {
		http.Error(w, "authentication failed", http.StatusUnauthorized)
		return
	}

	payload := buildEnrichmentPayload(req.InteractionID, req.ExternalURL)
	if err := validatePayload(payload); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	if err := verifyDataFreshness(payload.RecordReference, 5*time.Minute); err != nil {
		http.Error(w, err.Error(), http.StatusGone)
		return
	}

	if err := fetchGraphQLSchema(ctx, client, req.ExternalURL); err != nil {
		http.Error(w, "graphql schema verification failed", http.StatusBadGateway)
		return
	}

	start := time.Now()
	resp, err := executeDataAction(ctx, client, token, req.ActionID, payload)
	latency := float64(time.Since(start).Milliseconds())

	if err != nil {
		globalMetrics.FailureCount++
		audit := generateAuditLog(req.ActionID, "failed", latency, nil)
		syncToDataLake(ctx, client, token, os.Getenv("DATA_LAKE_WEBHOOK"), audit)
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	if err := verifySchemaDrift(resp, []string{"customerId", "tier", "riskScore"}); err != nil {
		globalMetrics.FailureCount++
		audit := generateAuditLog(req.ActionID, "schema_drift", latency, resp.Data)
		syncToDataLake(ctx, client, token, os.Getenv("DATA_LAKE_WEBHOOK"), audit)
		http.Error(w, err.Error(), http.StatusConflict)
		return
	}

	updates := applyFieldUpdates(resp, 10)
	globalMetrics.LatencySum += latency
	globalMetrics.SuccessCount++

	audit := generateAuditLog(req.ActionID, "success", latency, updates)
	syncToDataLake(ctx, client, token, os.Getenv("DATA_LAKE_WEBHOOK"), audit)

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(EnrichResponse{
		Success: true,
		Updates: updates,
		Audit:   audit,
		Metrics: globalMetrics,
	})
}

func main() {
	http.HandleFunc("/enrich", handleEnrich)
	slog.Info("enricher service listening on :8080")
	http.ListenAndServe(":8080", nil)
}

Common Errors & Debugging

Error: 429 Too Many Requests

• Cause: Genesys Cloud enforces rate limits per client ID and per endpoint. Rapid enrichment requests trigger throttling.
• Fix: Implement exponential backoff and read the Retry-After header. The token fetch and execution functions already include retry logic. Increase the delay interval if cascading failures occur.
• Code Fix: The fetchToken and executeDataAction functions check resp.StatusCode == http.StatusTooManyRequests and sleep before retrying.

Error: 401 Unauthorized or 403 Forbidden

• Cause: Missing or expired OAuth token, or insufficient scopes. The Data Actions API requires dataactions:execute and dataactions:read. Webhook registration requires webhooks:write.
• Fix: Verify the client credentials and scope string in the token payload. Ensure the token cache expires before the actual JWT expiration.
• Code Fix: The fetchToken function caches tokens and refreshes them 30 seconds before expiration. The scope string explicitly includes all required permissions.

Error: Schema Drift or Missing Fields

• Cause: The external GraphQL endpoint changed its response structure, or the Data Action configuration no longer matches the expected payload shape.
• Fix: Run verifySchemaDrift against a whitelist of required fields. Update the attribute matrix or fetch directive to match the new schema.
• Code Fix: The verifySchemaDrift function iterates over expected fields and returns a conflict error if any are missing. The service returns HTTP 409 to trigger schema reconciliation.

Error: 502 Bad Gateway or Timeout

• Cause: The external GraphQL endpoint is unreachable, or the Data Action execution exceeds the 15-second Genesys Cloud limit.
• Fix: Reduce payload size, optimize the GraphQL query to fetch only required fields, and ensure the external endpoint responds within 10 seconds.
• Code Fix: The createSecureClient function caps the timeout at 15 seconds. The context.WithTimeout in the handler enforces strict execution boundaries.

Official References

• Genesys Cloud Data Actions API Documentation
• Genesys Cloud OAuth 2.0 Authentication Guide
• Genesys Cloud Webhooks API Reference
• Go Standard Library net/http Documentation
• JSON Schema Validation in Go