package transaction

import (
	"errors"
	"fmt"
)

var (
	ErrNotFound       = errors.New("transaction record not found")
	ErrActiveExists   = errors.New("an unfinished transaction already exists")
	ErrStepConflict   = errors.New("step key already refers to different intent")
	ErrStepNotPending = errors.New("step is not waiting for an execution result")
)

// ActiveTransactionError 告知调用方当前阻塞新请求的事务。
type ActiveTransactionError struct {
	TransactionID string
}

func (e *ActiveTransactionError) Error() string {
	return fmt.Sprintf("%s: %s", ErrActiveExists, e.TransactionID)
}

func (e *ActiveTransactionError) Unwrap() error {
	return ErrActiveExists
}