waku-org/go-waku

package pb

import (
    "errors"
)

const MaxMetaAttrLength = 64

var (
    ErrMissingPayload      = errors.New("missing Payload field")
    ErrMissingContentTopic = errors.New("missing ContentTopic field")
    ErrInvalidMetaLength   = errors.New("invalid length for Meta field")
)

func (msg *WakuMessage) Validate() error {
    if len(msg.Payload) == 0 {
        return ErrMissingPayload
    }

    if msg.ContentTopic == "" {
        return ErrMissingContentTopic
    }

    if len(msg.Meta) > MaxMetaAttrLength {
        return ErrInvalidMetaLength
    }

    return nil
}