Union members are due to stop work for 24 hours starting Friday.
The objective is to increase security, integrity, traceability and confidence in public information, the energy ministry said.
The public has until April 30 to comment on the central bank's proposals that would give workers greater control over their payroll account, as well as use of that account in contracting and payment of loans.
Sector association UKRA warns new digital payment rules will impact profit margins and in some cases result in kiosk owners making a loss.
The Brazilian development bank will provide funds for projects that state water utility Sanepar will undertake in 83 localities.