If you are looking at using blockchain as a tool in a project, then we are talking about financial instructure.
Assuming that blockchain has been implemented within your organization, your suppliers organizations and your client's organization, then you can create financial transactions that operate across organizations, doing appropriate journalling and ledgering on both sides.
From the project's point of view, this should be transparent as your Finances unit would manage the blockchain.
Are you looking into using cryptocurrency in your project? Again, this should be irrelevant to your project. How you pay your suppliers is immaterial, just like it doesn't matter how your client pays you. Saving Changes...