func (a *API) FetchAcknowledgement(cid CIDType) (*Acknowledgement, error) {
	if cid == nil || *cid == "" {
		return nil, fmt.Errorf("Invalid acknowledgement CID [none]")
	}

	acknowledgementCID := string(*cid)

	matched, err := regexp.MatchString(config.AcknowledgementCIDRegex, acknowledgementCID)
	if err != nil {
		return nil, err
	}
	if !matched {
		return nil, fmt.Errorf("Invalid acknowledgement CID [%s]", acknowledgementCID)
	}

	result, err := a.Get(acknowledgementCID)
	if err != nil {
		return nil, err
	}

	if a.Debug {
		a.Log.Printf("[DEBUG] acknowledgement fetch, received JSON: %s", string(result))
	}

	acknowledgement := &Acknowledgement{}
	if err := json.Unmarshal(result, acknowledgement); err != nil {
		return nil, err
	}

	return acknowledgement, nil
}
func (a *API) FetchAcknowledgement(cid CIDType) (*Acknowledgement, error) {
	if cid == nil || *cid == "" {
		return nil, fmt.Errorf("Invalid acknowledgement CID [none]")
	}

	acknowledgementCID := string(*cid)

	matched, err := regexp.MatchString(config.AcknowledgementCIDRegex, acknowledgementCID)
	if err != nil {
		return nil, err
	}
	if !matched {
		return nil, fmt.Errorf("Invalid acknowledgement CID [%s]", acknowledgementCID)
	}

	result, err := a.Get(acknowledgementCID)
	if err != nil {
		return nil, err
	}

	if a.Debug {
		a.Log.Printf("[DEBUG] acknowledgement fetch, received JSON: %s", string(result))
	}

	acknowledgement := &Acknowledgement{}
	if err := json.Unmarshal(result, acknowledgement); err != nil {
		return nil, err
	}

	return acknowledgement, nil
}
// FetchAcknowledgement retrieves acknowledgement with passed cid.