Union Minister of State for Rural Development Ram Kripal Yadav has said, demonetization has played an effective role to curb black money. Addressing Digi Dhan Mela at Darbhanga in Bihar today, Mr. Yadav said, transparency in payments is being maintained through digital transaction and workers of unorganized sectors are reaping benefits of digital payment. He said, four villages of the district have been digitised and made cashless. He said, the country is fastly moving towards cashless transactions.