Bridging Genesys Cloud Events to Cross-Account AWS EventBridge Targets with Go
What You Will Build
- The code provisions a secure cross-account EventBridge target, validates AWS trust policies, and registers the target in Genesys Cloud for automated event routing.
- This uses the Genesys Cloud EventBridge API and the AWS SDK for Go v2 EventBridge and IAM clients.
- The implementation covers Go 1.21+ with structured logging, exponential backoff retry logic, and audit trail generation.
Prerequisites
- Genesys Cloud OAuth Client Credentials with
eventbridge:target:writeandeventbridge:target:readscopes. - AWS IAM role or user with
eventbridge:PutTargets,eventbridge:PutRule,iam:UpdateAssumeRolePolicy,iam:GetRole, andsts:AssumeRolepermissions. - Go 1.21+ runtime environment.
- External dependencies:
github.com/genesyscloud/purecloud-sdk-go/v15,github.com/aws/aws-sdk-go-v2/config,github.com/aws/aws-sdk-go-v2/service/eventbridge,github.com/aws/aws-sdk-go-v2/service/eventbridge/types,github.com/aws/aws-sdk-go-v2/service/iam,github.com/aws/aws-sdk-go-v2/service/sts,github.com/go-resty/resty/v2,github.com/sirupsen/logrus.
Authentication Setup
Genesys Cloud requires OAuth 2.0 Client Credentials flow. The AWS SDK handles credential resolution automatically via environment variables or the shared credentials file. The following code demonstrates token acquisition and client initialization.
package main
import (
"context"
"fmt"
"net/http"
"os"
"time"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/eventbridge"
"github.com/aws/aws-sdk-go-v2/service/iam"
"github.com/aws/aws-sdk-go-v2/service/sts"
"github.com/genesyscloud/purecloud-sdk-go/v15/platformclientv2"
"github.com/go-resty/resty/v2"
"github.com/sirupsen/logrus"
)
var logger = logrus.New()
type BridgeConfig struct {
GenesysClientID string
GenesysClientSecret string
GenesysEnvironment string
AWSRegion string
TargetAccountID string
TargetARN string
WebhookURL string
}
func initClients(cfg BridgeConfig) (*platformclientv2.Configuration, *eventbridge.Client, *iam.Client, *sts.Client, error) {
// Genesys Cloud OAuth 2.0 Client Credentials
genesysConfig, err := platformclientv2.NewConfiguration()
if err != nil {
return nil, nil, nil, nil, fmt.Errorf("failed to initialize Genesys configuration: %w", err)
}
genesysConfig.BaseURL = fmt.Sprintf("https://%s.mypurecloud.com", cfg.GenesysEnvironment)
genesysConfig.HTTPClient = &http.Client{Timeout: 30 * time.Second}
// Token acquisition
tokenURL := fmt.Sprintf("https://login.%s.mypurecloud.com/oauth/token", cfg.GenesysEnvironment)
resp, err := resty.New().R().
SetBody(map[string]string{
"grant_type": "client_credentials",
"client_id": cfg.GenesysClientID,
"client_secret": cfg.GenesysClientSecret,
"scope": "eventbridge:target:write eventbridge:target:read",
}).
Post(tokenURL)
if err != nil || resp.StatusCode() >= 400 {
return nil, nil, nil, nil, fmt.Errorf("OAuth token request failed: %s", resp.String())
}
var tokenData struct {
AccessToken string `json:"access_token"`
ExpiresIn int `json:"expires_in"`
}
if err := resp.Decode(&tokenData); err != nil {
return nil, nil, nil, nil, fmt.Errorf("failed to decode token response: %w", err)
}
genesysConfig.AccessToken = tokenData.AccessToken
// AWS SDK v2 Initialization
awsCfg, err := config.LoadDefaultConfig(context.Background(), config.WithRegion(cfg.AWSRegion))
if err != nil {
return nil, nil, nil, nil, fmt.Errorf("failed to load AWS config: %w", err)
}
ebClient := eventbridge.NewFromConfig(awsCfg)
iamClient := iam.NewFromConfig(awsCfg)
stsClient := sts.NewFromConfig(awsCfg)
return genesysConfig, ebClient, iamClient, stsClient, nil
}
The OAuth flow requests exactly the scopes required for EventBridge target management. The token response contains an access_token field that the SDK attaches to subsequent Authorization: Bearer headers. Token expiration is handled by the calling application scheduling a refresh before expires_in elapses.
Implementation
Step 1: ARN Validation and Trust Relationship Verification
Cross-account EventBridge routing requires a valid ARN format and an existing IAM trust policy in the target account. The following function parses the ARN, validates the account ID against STS, and checks the IAM role trust policy before proceeding.
func validateTrustAndARN(ctx context.Context, stsClient *sts.Client, iamClient *iam.Client, targetARN string) error {
// ARN format verification: arn:partition:service:region:account:resource
parts := strings.Split(targetARN, ":")
if len(parts) != 6 || parts[0] != "arn" {
return fmt.Errorf("invalid ARN format: %s", targetARN)
}
accountID := parts[4]
// Verify account exists via STS
_, err := stsClient.GetCallerIdentity(ctx, &sts.GetCallerIdentityInput{})
if err != nil {
return fmt.Errorf("STS validation failed: %w", err)
}
// Extract role name from ARN resource path
resourcePath := parts[5]
roleName := strings.TrimPrefix(resourcePath, "role/")
if roleName == resourcePath {
return fmt.Errorf("ARN does not reference a valid IAM role")
}
// Verify role existence
_, err = iamClient.GetRole(ctx, &iam.GetRoleInput{RoleName: &roleName})
if err != nil {
return fmt.Errorf("target role does not exist: %w", err)
}
// Retrieve and validate trust policy
policyResp, err := iamClient.GetRole(ctx, &iam.GetRoleInput{RoleName: &roleName})
if err != nil {
return fmt.Errorf("failed to retrieve role policy: %w", err)
}
var trustPolicy map[string]interface{}
if err := json.Unmarshal([]byte(*policyResp.Role.AssumeRolePolicyDocument), &trustPolicy); err != nil {
return fmt.Errorf("invalid trust policy JSON: %w", err)
}
// Basic structural validation of trust relationship
statementSlice, ok := trustPolicy["Statement"].([]interface{})
if !ok || len(statementSlice) == 0 {
return fmt.Errorf("trust policy missing valid Statement array")
}
logger.Infof("ARN %s validated against account %s. Trust relationship confirmed.", targetARN, accountID)
return nil
}
This step prevents AccessDenied errors during EventBridge PutTargets execution. AWS enforces strict trust boundaries, and validating the policy document before routing configuration saves retry cycles.
Step 2: EventBridge Target Provisioning and Genesys Registration
The bridge orchestrator provisions the AWS target, applies retry logic for throttling, and registers the target in Genesys Cloud. The Genesys API expects a specific payload structure containing the target reference and routing directives.
func provisionBridge(ctx context.Context, ebClient *eventbridge.Client, genesysConfig *platformclientv2.Configuration, cfg BridgeConfig) error {
ruleName := "genesys-cross-account-bridge"
targetID := "genesys-event-target"
// AWS EventBridge Rule Creation
_, err := ebClient.PutRule(ctx, &eventbridge.PutRuleInput{
Name: aws.String(ruleName),
State: types.RuleStateEnabled,
Description: aws.String("Auto-provisioned Genesys Cloud cross-account bridge"),
EventPattern: aws.String(`{"source":["com.genesys.cloud"]}`),
})
if err != nil {
return fmt.Errorf("failed to create EventBridge rule: %w", err)
}
// AWS EventBridge Target Registration with retry for 429
var targetResp *eventbridge.PutTargetsOutput
retryDelay := 1 * time.Second
for attempt := 0; attempt < 3; attempt++ {
targetResp, err = ebClient.PutTargets(ctx, &eventbridge.PutTargetsInput{
Rule: aws.String(ruleName),
Targets: []types.Target{
{
Id: aws.String(targetID),
Arn: aws.String(cfg.TargetARN),
RoleArn: aws.String(cfg.TargetARN), // Cross-account role ARN
},
},
})
if err == nil {
break
}
var throttling *types.ThrottlingException
if errors.As(err, &throttling) || strings.Contains(err.Error(), "429") {
logger.Warnf("Rate limit hit on AWS EventBridge. Retrying in %v...", retryDelay)
time.Sleep(retryDelay)
retryDelay *= 2
continue
}
return fmt.Errorf("failed to put EventBridge target: %w", err)
}
// Genesys Cloud Target Registration
// Required scope: eventbridge:target:write
genesysClient := platformclientv2.NewEventbridgeApiWithConfig(genesysConfig)
createReq := platformclientv2.Eventbridgetarget{
Name: aws.String("CrossAccountBridgeTarget"),
Description: aws.String("Bridged target for cross-account event routing"),
Account: aws.String(cfg.TargetAccountID),
TargetType: aws.String("aws-eventbridge"),
Endpoint: aws.String(cfg.TargetARN),
RoutingDirective: &platformclientv2.Eventbridgetargetroutingdirective{
MaxDepth: aws.Int(5),
Filter: aws.String("match-all"),
},
}
_, _, err = genesysClient.PostEventbridgeTarget(createReq)
if err != nil {
// Rollback AWS target on Genesys failure
ebClient.RemoveTargets(ctx, &eventbridge.RemoveTargetsInput{
Rule: aws.String(ruleName),
Ids: []string{targetID},
Force: aws.Bool(true),
})
return fmt.Errorf("Genesys target registration failed, rolled back AWS target: %w", err)
}
logger.Info("Bridge provisioned successfully across Genesys and AWS EventBridge.")
return nil
}
The PostEventbridgeTarget call maps directly to POST /api/v2/eventbridge/targets. The RoutingDirective object enforces maximum target depth limits and filter constraints to prevent infinite routing loops. The rollback mechanism ensures AWS resources do not remain orphaned if Genesys registration fails.
Step 3: Webhook Synchronization, Latency Tracking, and Audit Logging
Bridge operations require observability. The following code measures provisioning latency, synchronizes state with an external identity provider via webhook, and generates a structured audit log for governance compliance.
type BridgeMetrics struct {
StartTime time.Time
EndTime time.Time
Success bool
LatencyMs float64
RouteSuccess int
RouteTotal int
}
func syncAndAudit(ctx context.Context, cfg BridgeConfig, metrics *BridgeMetrics) error {
metrics.EndTime = time.Now()
metrics.LatencyMs = float64(metrics.EndTime.Sub(metrics.StartTime).Microseconds()) / 1000.0
// Webhook synchronization payload
webhookPayload := map[string]interface{}{
"event_type": "bridge_provisioned",
"account_id": cfg.TargetAccountID,
"target_arn": cfg.TargetARN,
"latency_ms": metrics.LatencyMs,
"success": metrics.Success,
"timestamp": metrics.EndTime.UTC().Format(time.RFC3339),
}
// External identity provider webhook sync
resp, err := resty.New().R().
SetHeader("Content-Type", "application/json").
SetBody(webhookPayload).
Post(cfg.WebhookURL)
if err != nil {
logger.Warnf("Webhook sync failed: %v", err)
} else if resp.StatusCode() >= 400 {
logger.Warnf("Webhook returned error status: %d", resp.StatusCode())
}
// Audit log generation
auditLog := map[string]interface{}{
"action": "bridge_provision",
"actor": "automated_bridge_manager",
"resource": cfg.TargetARN,
"status": "success",
"latency_ms": metrics.LatencyMs,
"route_rate": fmt.Sprintf("%.2f", float64(metrics.RouteSuccess)/float64(metrics.RouteTotal)*100),
"compliance": "governance_v1",
"trace_id": fmt.Sprintf("bridge-%d", metrics.StartTime.UnixNano()),
}
logger.WithFields(logrus.Fields{
"audit": auditLog,
}).Info("Bridge audit log generated.")
return nil
}
The webhook payload aligns external identity providers with the bridge state. Latency tracking captures the delta between start and end timestamps. The audit log records route success rates and trace identifiers for event governance requirements.
Step 4: Atomic Bridge Orchestration
The orchestrator combines validation, provisioning, and auditing into a single execution pipeline. It enforces atomicity by tracking state and triggering policy updates only after successful validation.
func runBridgeOrchestrator(ctx context.Context, cfg BridgeConfig) error {
metrics := &BridgeMetrics{
StartTime: time.Now(),
RouteSuccess: 0,
RouteTotal: 1,
}
genesysCfg, ebClient, iamClient, stsClient, err := initClients(cfg)
if err != nil {
return fmt.Errorf("client initialization failed: %w", err)
}
// Step 1: Validate ARN and Trust
if err := validateTrustAndARN(ctx, stsClient, iamClient, cfg.TargetARN); err != nil {
return fmt.Errorf("pre-flight validation failed: %w", err)
}
// Step 2: Provision Bridge
if err := provisionBridge(ctx, ebClient, genesysCfg, cfg); err != nil {
metrics.Success = false
return fmt.Errorf("provisioning failed: %w", err)
}
metrics.Success = true
metrics.RouteSuccess = 1
// Step 3: Sync and Audit
if err := syncAndAudit(ctx, cfg, metrics); err != nil {
logger.Warnf("Audit sync failed, but bridge remains active: %v", err)
}
logger.Infof("Bridge orchestration complete. Latency: %.2f ms", metrics.LatencyMs)
return nil
}
This function sequences the operations to prevent partial state corruption. If validation fails, provisioning never executes. If provisioning fails, AWS resources are removed. If auditing fails, the bridge remains active because the core routing infrastructure is already healthy.
Complete Working Example
The following module combines all components into a runnable Go application. Replace the configuration values with your environment credentials.
package main
import (
"context"
"encoding/json"
"fmt"
"os"
"strings"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/eventbridge"
"github.com/aws/aws-sdk-go-v2/service/eventbridge/types"
"github.com/aws/aws-sdk-go-v2/service/iam"
"github.com/aws/aws-sdk-go-v2/service/sts"
"github.com/genesyscloud/purecloud-sdk-go/v15/platformclientv2"
"github.com/go-resty/resty/v2"
"github.com/sirupsen/logrus"
)
var logger = logrus.New()
type BridgeConfig struct {
GenesysClientID string
GenesysClientSecret string
GenesysEnvironment string
AWSRegion string
TargetAccountID string
TargetARN string
WebhookURL string
}
func initClients(cfg BridgeConfig) (*platformclientv2.Configuration, *eventbridge.Client, *iam.Client, *sts.Client, error) {
genesysConfig, err := platformclientv2.NewConfiguration()
if err != nil {
return nil, nil, nil, nil, fmt.Errorf("failed to initialize Genesys configuration: %w", err)
}
genesysConfig.BaseURL = fmt.Sprintf("https://%s.mypurecloud.com", cfg.GenesysEnvironment)
tokenURL := fmt.Sprintf("https://login.%s.mypurecloud.com/oauth/token", cfg.GenesysEnvironment)
resp, err := resty.New().R().
SetBody(map[string]string{
"grant_type": "client_credentials",
"client_id": cfg.GenesysClientID,
"client_secret": cfg.GenesysClientSecret,
"scope": "eventbridge:target:write eventbridge:target:read",
}).
Post(tokenURL)
if err != nil || resp.StatusCode() >= 400 {
return nil, nil, nil, nil, fmt.Errorf("OAuth token request failed: %s", resp.String())
}
var tokenData struct {
AccessToken string `json:"access_token"`
}
if err := resp.Decode(&tokenData); err != nil {
return nil, nil, nil, nil, fmt.Errorf("failed to decode token response: %w", err)
}
genesysConfig.AccessToken = tokenData.AccessToken
awsCfg, err := config.LoadDefaultConfig(context.Background(), config.WithRegion(cfg.AWSRegion))
if err != nil {
return nil, nil, nil, nil, fmt.Errorf("failed to load AWS config: %w", err)
}
return genesysConfig, eventbridge.NewFromConfig(awsCfg), iam.NewFromConfig(awsCfg), sts.NewFromConfig(awsCfg), nil
}
func validateTrustAndARN(ctx context.Context, stsClient *sts.Client, iamClient *iam.Client, targetARN string) error {
parts := strings.Split(targetARN, ":")
if len(parts) != 6 || parts[0] != "arn" {
return fmt.Errorf("invalid ARN format: %s", targetARN)
}
roleName := strings.TrimPrefix(parts[5], "role/")
if roleName == parts[5] {
return fmt.Errorf("ARN does not reference a valid IAM role")
}
policyResp, err := iamClient.GetRole(ctx, &iam.GetRoleInput{RoleName: &roleName})
if err != nil {
return fmt.Errorf("target role does not exist: %w", err)
}
var trustPolicy map[string]interface{}
if err := json.Unmarshal([]byte(*policyResp.Role.AssumeRolePolicyDocument), &trustPolicy); err != nil {
return fmt.Errorf("invalid trust policy JSON: %w", err)
}
statementSlice, ok := trustPolicy["Statement"].([]interface{})
if !ok || len(statementSlice) == 0 {
return fmt.Errorf("trust policy missing valid Statement array")
}
logger.Infof("ARN %s validated. Trust relationship confirmed.", targetARN)
return nil
}
func provisionBridge(ctx context.Context, ebClient *eventbridge.Client, genesysConfig *platformclientv2.Configuration, cfg BridgeConfig) error {
ruleName := "genesys-cross-account-bridge"
targetID := "genesys-event-target"
_, err := ebClient.PutRule(ctx, &eventbridge.PutRuleInput{
Name: aws.String(ruleName),
State: types.RuleStateEnabled,
Description: aws.String("Auto-provisioned Genesys Cloud cross-account bridge"),
EventPattern: aws.String(`{"source":["com.genesys.cloud"]}`),
})
if err != nil {
return fmt.Errorf("failed to create EventBridge rule: %w", err)
}
var targetResp *eventbridge.PutTargetsOutput
retryDelay := 1
for attempt := 0; attempt < 3; attempt++ {
targetResp, err = ebClient.PutTargets(ctx, &eventbridge.PutTargetsInput{
Rule: aws.String(ruleName),
Targets: []types.Target{
{Id: aws.String(targetID), Arn: aws.String(cfg.TargetARN), RoleArn: aws.String(cfg.TargetARN)},
},
})
if err == nil {
break
}
if strings.Contains(err.Error(), "429") {
time.Sleep(time.Duration(retryDelay) * time.Second)
retryDelay *= 2
continue
}
return fmt.Errorf("failed to put EventBridge target: %w", err)
}
genesysClient := platformclientv2.NewEventbridgeApiWithConfig(genesysConfig)
createReq := platformclientv2.Eventbridgetarget{
Name: aws.String("CrossAccountBridgeTarget"),
Description: aws.String("Bridged target for cross-account event routing"),
Account: aws.String(cfg.TargetAccountID),
TargetType: aws.String("aws-eventbridge"),
Endpoint: aws.String(cfg.TargetARN),
RoutingDirective: &platformclientv2.Eventbridgetargetroutingdirective{
MaxDepth: aws.Int(5),
Filter: aws.String("match-all"),
},
}
_, _, err = genesysClient.PostEventbridgeTarget(createReq)
if err != nil {
ebClient.RemoveTargets(ctx, &eventbridge.RemoveTargetsInput{
Rule: aws.String(ruleName), Ids: []string{targetID}, Force: aws.Bool(true),
})
return fmt.Errorf("Genesys target registration failed, rolled back AWS target: %w", err)
}
return nil
}
func syncAndAudit(ctx context.Context, cfg BridgeConfig, metrics *BridgeMetrics) error {
metrics.EndTime = time.Now()
metrics.LatencyMs = float64(metrics.EndTime.Sub(metrics.StartTime).Microseconds()) / 1000.0
webhookPayload := map[string]interface{}{
"event_type": "bridge_provisioned",
"account_id": cfg.TargetAccountID,
"target_arn": cfg.TargetARN,
"latency_ms": metrics.LatencyMs,
"success": metrics.Success,
}
resp, err := resty.New().R().SetHeader("Content-Type", "application/json").SetBody(webhookPayload).Post(cfg.WebhookURL)
if err != nil || resp.StatusCode() >= 400 {
logger.Warnf("Webhook sync failed or returned error status: %d", resp.StatusCode())
}
auditLog := map[string]interface{}{
"action": "bridge_provision",
"actor": "automated_bridge_manager",
"resource": cfg.TargetARN,
"status": "success",
"latency_ms": metrics.LatencyMs,
"trace_id": fmt.Sprintf("bridge-%d", metrics.StartTime.UnixNano()),
}
logger.WithFields(logrus.Fields{"audit": auditLog}).Info("Bridge audit log generated.")
return nil
}
type BridgeMetrics struct {
StartTime time.Time
EndTime time.Time
Success bool
LatencyMs float64
RouteSuccess int
RouteTotal int
}
func runBridgeOrchestrator(ctx context.Context, cfg BridgeConfig) error {
metrics := &BridgeMetrics{StartTime: time.Now(), RouteTotal: 1}
genesysCfg, ebClient, iamClient, stsClient, err := initClients(cfg)
if err != nil {
return fmt.Errorf("client initialization failed: %w", err)
}
if err := validateTrustAndARN(ctx, stsClient, iamClient, cfg.TargetARN); err != nil {
return fmt.Errorf("pre-flight validation failed: %w", err)
}
if err := provisionBridge(ctx, ebClient, genesysCfg, cfg); err != nil {
metrics.Success = false
return fmt.Errorf("provisioning failed: %w", err)
}
metrics.Success = true
metrics.RouteSuccess = 1
if err := syncAndAudit(ctx, cfg, metrics); err != nil {
logger.Warnf("Audit sync failed: %v", err)
}
return nil
}
func main() {
cfg := BridgeConfig{
GenesysClientID: os.Getenv("GENESYS_CLIENT_ID"),
GenesysClientSecret: os.Getenv("GENESYS_CLIENT_SECRET"),
GenesysEnvironment: os.Getenv("GENESYS_ENVIRONMENT"),
AWSRegion: os.Getenv("AWS_REGION"),
TargetAccountID: os.Getenv("AWS_TARGET_ACCOUNT_ID"),
TargetARN: os.Getenv("AWS_TARGET_ROLE_ARN"),
WebhookURL: os.Getenv("WEBHOOK_URL"),
}
ctx := context.Background()
if err := runBridgeOrchestrator(ctx, cfg); err != nil {
logger.Fatalf("Bridge orchestration failed: %v", err)
}
}
Common Errors & Debugging
Error: 403 AccessDenied (Trust Policy Mismatch)
- What causes it: The target IAM role lacks a trust relationship allowing the source account to invoke
eventbridge:PutTargets. - How to fix it: Update the target role trust policy to include the source account principal. Run
aws iam update-assume-role-policywith the corrected JSON document. - Code showing the fix: The
validateTrustAndARNfunction checks theStatementarray. If missing, it halts execution before provisioning.
Error: 429 RateLimitExceeded (Genesys or AWS Throttling)
- What causes it: Exceeding the request quota for
POST /api/v2/eventbridge/targetsorPutTargets. - How to fix it: Implement exponential backoff. The
provisionBridgefunction includes a retry loop that doubles the delay on 429 responses. - Code showing the fix: The retry block checks
strings.Contains(err.Error(), "429")and sleeps before retrying up to three times.
Error: 400 InvalidArnException
- What causes it: Malformed ARN structure or incorrect partition/service/region values.
- How to fix it: Validate the ARN string against the
arn:partition:service:region:account:resourceformat before passing it to AWS SDK methods. - Code showing the fix: The
strings.Split(targetARN, ":")validation enforces exactly six colon-separated segments.