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import config from "$config";
import { g, s } from "$lib/db";
import { lnb } from "$lib/ln";
import { fail, wait } from "$lib/utils";
import {
CashuMint,
CashuWallet,
MintQuoteState,
getDecodedToken,
getEncodedToken,
getEncodedTokenV4,
} from "@cashu/cashu-ts";
const m = new CashuMint(config.mintUrl);
const w = new CashuWallet(m);
const enc = (proofs, v = 4) =>
(v === 4 ? getEncodedTokenV4 : getEncodedToken)({
token: [{ mint: config.mintUrl, proofs }],
});
const dec = (token) => getDecodedToken(token).token[0];
const ext = async (mint) => {
const issuer = new CashuMint(mint);
const { pubkey: issuerPk } = await issuer.getInfo();
const { pubkey: ourPk } = await m.getInfo();
return issuerPk !== ourPk;
};
export async function get(id, v = 4) {
const token = await g(`cash:${id}`);
if (v < 4) return enc(dec(token).proofs, 3);
return token;
}
export async function claim(token) {
const { proofs: current } = dec(await g("cash"));
const { mint } = dec(token);
if (await ext(mint)) fail("Unable to receive from other mints");
const rcvd = await w.receive(token);
await s("cash", enc([...current, ...rcvd]));
return rcvd.reduce((a, b) => a + b.amount, 0);
}
export async function mint(amount, v = 4) {
const { proofs } = dec(await g("cash"));
const { send, returnChange } = await w.send(amount, proofs);
const rcvd = await w.receive(enc(send, v));
const change = enc(returnChange, v);
await s("cash", change);
return enc(rcvd, v);
}
export async function check(token) {
const o = dec(token);
const { mint, proofs } = o;
const total = proofs.reduce((a, b) => a + b.amount, 0);
const external = await ext(mint);
const r = await w.checkProofsSpent(proofs);
const spent = r.reduce((a, b) => a + b.amount, 0);
return { total, spent, mint, external };
}
export async function init(amount = 10000) {
try {
await new Promise((r) => setTimeout(r, 2000));
const { quote, request } = await w.createMintQuote(amount);
await lnb.pay(request);
await wait(async () => {
const { state } = await w.checkMintQuote(quote);
return state === MintQuoteState.PAID;
});
const { proofs } = await w.mintTokens(amount, quote);
const cash = getEncodedTokenV4({
token: [{ mint: config.mintUrl, proofs }],
});
await s("cash", cash);
} catch (e) {
console.log(e);
}
}
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