Add 'Config.Backoff'.

Author: ewbankkit

aws_config.go

@@ -202,6 +202,12 @@ func resolveRetryer(ctx context.Context, c *Config, awsConfig *aws.Config) {
 
 	var standardOptions []func(*retry.StandardOptions)
 
+	if backoff := c.Backoff; backoff != nil {
+		standardOptions = append(standardOptions, func(so *retry.StandardOptions) {
+			so.Backoff = backoff
+		})
+	}
+
 	if v, found, _ := awsconfig.GetRetryMaxAttempts(ctx, awsConfig.ConfigSources); found && v != 0 {
 		standardOptions = append(standardOptions, func(so *retry.StandardOptions) {
 			so.MaxAttempts = v

internal/config/config.go

@@ -13,6 +13,7 @@ import (
 	"time"
 
 	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/aws/retry"
 	awshttp "github.com/aws/aws-sdk-go-v2/aws/transport/http"
 	"github.com/aws/aws-sdk-go-v2/feature/ec2/imds"
 	"github.com/hashicorp/aws-sdk-go-base/v2/diag"
@@ -34,6 +35,7 @@ type Config struct {
 	APNInfo                        *APNInfo
 	AssumeRole                     *AssumeRole
 	AssumeRoleWithWebIdentity      *AssumeRoleWithWebIdentity
+	Backoff                        retry.BackoffDelayer
 	CallerDocumentationURL         string
 	CallerName                     string
 	CustomCABundle                 string