Go SDK

go get github.com/rahvis/email/SDK/go

package main
 
import (
    "context"
    "fmt"
    "log"
    "os"
 
    workonward "github.com/rahvis/email/SDK/go"
)
 
func main() {
    client, err := workonward.NewClient(os.Getenv("WORKONWARD_API_KEY"))
    if err != nil {
        log.Fatal(err)
    }
 
    result, err := client.Send(context.Background(), "user@example.com", workonward.SendOptions{
        Attribs: map[string]string{"first_name": "Ada"},
    })
    if err != nil {
        log.Fatal(err)
    }
 
    fmt.Println(result.MessageID, result.Engine)
}

result, err := client.SendBatch(
    context.Background(),
    []string{"ada@example.com", "grace@example.com"},
    workonward.SendOptions{
        Attribs: map[string]string{"campaign": "launch"},
    },
)
if err != nil {
    log.Fatal(err)
}
fmt.Println(result.Accepted, result.MessageIDs)

retry := workonward.DefaultRetryConfig()
retry.MaxRetries = 2
 
client, err := workonward.NewClient(
    os.Getenv("WORKONWARD_API_KEY"),
    workonward.WithBaseURL("https://mail.gitdate.ink/api"),
    workonward.WithTimeout(10*time.Second),
    workonward.WithRetryConfig(retry),
    workonward.WithHeader("X-Request-Source", "billing-service"),
)

_, err := client.Send(ctx, "user@example.com", workonward.SendOptions{})
if err != nil {
    switch e := err.(type) {
    case *workonward.AuthenticationError:
        log.Printf("API key rejected: %d", e.Code)
    case *workonward.InvalidRecipientError:
        log.Printf("bad recipient: %s", e.Message)
    default:
        log.Printf("send failed: %v", err)
    }
}