What is correct in respect of jajmani system?

Another variant of this was a system where artisans and individual peasant households entered into a mutually negotiated system of remuneration, most of the time goods for services. The jajmani system or yajman system was an economic system most notably found in villages of India in which lower castes performed various functions for upper castes and received grain or other goods in return. It was an occupational division of labour involving a system of role-relationships that enabled villages to be mostly self-sufficient.