Mint and get exclusive payment

exclusivePayment.js

// Alice withdraws a payment for Bob from her purse.
import { makeMint } from '@agoric/ertp/core/mint';
const bucksMint = makeMint('bucks');
const purse = bucksMint.mint(1000, `alice's purse`);
const paymentForBob = purse.withdraw(10, `bob's money`);
// The particular methods of the bobsAgent object are up to Bob.
bobsAgent.receivePayment(paymentForBob);

// Bob receives an alleged payment from Alice.
// Bob claims it exclusively and validates it 
// using an assay he had gotten independently.
const exclusivePayment = bucksAssay.claimAll(allegedPaymentFromAlice);