cornucopia

Example:

import { CashuLocalStorage, BrowserLocker } from "cornucopia";
import { minAmount } from "cornucopia/selection";
import { CashuWallet, CashuMint } from "@cashu/cashu-ts";

const locker = new BrowserLocker('locks')
const storage = new CashuLocalStorage("https://mint.example.com", "sat", locker)

const wallet = new CashuWallet(new CashuMint("https://mint.example.com"), {
  unit: "sat",
});

const payInvoice = async (invoice: string, amount: number) => {
  const meltQuote = await wallet.createMeltQuote(invoice);

  return await storage.transaction(
		selection =>
      selection.getAvailableProofs()
        .then(minAmount(meltQuote.amount + meltQuote.fee_reserve)),
		async (proofs) => {
			const { change } = await wallet.meltProofs(meltQuote, proofs);

			return change;
		}
	);
};

const sendTokens = async (amount: number) => {
  return await storage.transaction(
		selection => selection.getAvailableProofs().then(minAmount(amount)),
		async (proofs) => {
			const { send, keep } = await wallet.send(amount, proofs);

			const res = await fetch('/rug', {
				method: 'POST',
				body: JSON.stringify(send)
			})

			// rollback transaction
			if(!res.ok) throw new Error('Request failed')

			return keep;
		}
	);
};