From 6b8c43f3577513427bddc57503cbb5c2f1cbf462 Mon Sep 17 00:00:00 2001
From: Adam Soltys <asoltys@gmail.com>
Date: Fri, 8 Mar 2024 23:01:49 -0800
Subject: wip

---
 src/components/Lnurlp.svelte                | 14 +++++++--
 src/components/Numpad.svelte                |  1 +
 src/routes/(app)/ln/[lnurl]/+page.server.js | 44 +++++++++++++++++++++++++++--
 3 files changed, 55 insertions(+), 4 deletions(-)

diff --git a/src/components/Lnurlp.svelte b/src/components/Lnurlp.svelte
index 6785061a..c8427fac 100644
--- a/src/components/Lnurlp.svelte
+++ b/src/components/Lnurlp.svelte
@@ -7,7 +7,9 @@
 
   export let data, form, send;
   let { currency } = data.user;
-  let { minSendable, maxSendable, callback, metadata, rates } = data;
+  let { currencies, minSendable, maxSendable, callback, metadata, rates } =
+    data;
+
 
   $: rate = rates[currency];
 
@@ -36,7 +38,15 @@
     </div>
   {/if}
 
-  <Numpad bind:amount bind:rate {currency} bind:submit={send} />
+  {JSON.stringify(currencies[currency])}
+  <select bind:value={currency}>
+    {#each currencies as c}
+      <option value={c.code}>{c.symbol}</option>
+    {/each}
+  </select>
+
+  {amount} {rate} {currency}
+  <Numpad bind:amount bind:rate bind:currency bind:submit={send} />
 
   <form action="?/pay" method="POST" use:enhance on:submit={submit}>
     <input name="amount" value={amount} type="hidden" />
diff --git a/src/components/Numpad.svelte b/src/components/Numpad.svelte
index 9119999f..b7551a73 100644
--- a/src/components/Numpad.svelte
+++ b/src/components/Numpad.svelte
@@ -183,6 +183,7 @@
     e.key === "Enter" && (e.preventDefault() || submit.click());
 </script>
 
+{symbol}
 <div class="flex justify-center items-center mb-3 px-3">
   <div class="space-y-5">
     <div class="text-center">
diff --git a/src/routes/(app)/ln/[lnurl]/+page.server.js b/src/routes/(app)/ln/[lnurl]/+page.server.js
index 910ce5a5..6acfcfce 100644
--- a/src/routes/(app)/ln/[lnurl]/+page.server.js
+++ b/src/routes/(app)/ln/[lnurl]/+page.server.js
@@ -2,7 +2,7 @@ import { fd, auth, get, post } from "$lib/utils";
 import { error, fail, redirect } from "@sveltejs/kit";
 
 export async function load({ params, parent }) {
-  let { user } = await parent();
+  let { rates, user } = await parent();
   if (!user) redirect(307, "/register");
 
   let data;
@@ -14,12 +14,46 @@ export async function load({ params, parent }) {
     error(500, e.message);
   }
 
+  let currencies = [
+    {
+      code: "BRL",
+      name: "Reais",
+      symbol: "R$",
+      decimals: 2,
+      multiplier: 2932.290939091977,
+      convertible: { max: 100000, min: 100 },
+    },
+    {
+      code: "USDT",
+      name: "Tether",
+      symbol: "$",
+      decimals: 6,
+      multiplier: 1.4602808876678048,
+      convertible: { max: 200000000, min: 200000 },
+    },
+  ];
+
+  if (data.currencies) {
+    data.currencies.map(
+      (c) => (rates[c.code] = c.multiplier * 10 ** (c.decimals - 3) * 1000)
+    );
+  }
+
+  data.rates = rates;
+
   if (!["payRequest", "withdrawRequest"].includes(data.tag))
     error(500, "We only support LNURLp and LNURLw at this time");
 
   return data;
 }
 
+const convertAmount = (amount, multiplier, decimals) => {
+  const conversionFactor = multiplier * 10 ** (decimals - 3);
+  const convertedAmount = amount / conversionFactor;
+
+  return convertedAmount.toFixed(decimals);
+};
+
 export const actions = {
   pay: async ({ cookies, fetch, request }) => {
     let error;
@@ -28,13 +62,19 @@ export const actions = {
     minSendable = Math.round(minSendable / 1000);
     maxSendable = Math.round(maxSendable / 1000);
 
+
+
     if (amount < minSendable)
       error = `Amount must be at least ${minSendable} sats`;
     if (amount > maxSendable)
       error = `Amount must be at most ${maxSendable} sats`;
     if (error) return fail(400, { error });
 
-    let { pr } = await fetch(`${callback}?amount=${amount * 1000}`).then((r) =>
+    const a = currency
+      ? `${Math.trunc(+amount * 10 ** currency.decimals)}.${currency.code}`
+      : (+amount * 1000).toString();
+
+    let { pr } = await fetch(`${callback}?amount=${a}`).then((r) =>
       r.json()
     );
     redirect(307, `/send/lightning/${pr}`);
-- 
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