RegisterOss

This is the interface for registering as a gateway.

// RegisterOss registered as oss role
//   - peerId: peer id
//   - domain: domain name, can be empty
//
// Return:
//   - string: block hash
//   - error: error message
func (c *ChainClient) RegisterOss(peerId []byte, domain string) (string, error)

For example code, please refer to run.go