From d91dbbcac3514f900425b7f38ecf49c14f8e1abb Mon Sep 17 00:00:00 2001
From: Tiago vasconcelos <talvasconcelos@gmail.com>
Date: Fri, 11 Jun 2021 16:48:13 +0100
Subject: [PATCH] allow invoices to be generated using Fiat values

---
 lnbits/core/static/js/wallet.js        | 14 ++++++++++++++
 lnbits/core/templates/core/wallet.html | 11 ++++++++++-
 lnbits/core/views/api.py               | 15 ++++++++++++++-
 lnbits/static/js/base.js               |  9 ++++++++-
 4 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/lnbits/core/static/js/wallet.js b/lnbits/core/static/js/wallet.js
index 7e91278bd..d01910514 100644
--- a/lnbits/core/static/js/wallet.js
+++ b/lnbits/core/static/js/wallet.js
@@ -119,6 +119,8 @@ new Vue({
         paymentHash: null,
         minMax: [0, 2100000000000000],
         lnurl: null,
+        units: ['sat'],
+        unit: 'sat',
         data: {
           amount: null,
           memo: ''
@@ -233,6 +235,7 @@ new Vue({
       this.receive.paymentHash = null
       this.receive.data.amount = null
       this.receive.data.memo = null
+      this.receive.unit = 'sat'
       this.receive.paymentChecker = null
       this.receive.minMax = [0, 2100000000000000]
       this.receive.lnurl = null
@@ -269,11 +272,13 @@ new Vue({
     },
     createInvoice: function () {
       this.receive.status = 'loading'
+
       LNbits.api
         .createInvoice(
           this.g.wallet,
           this.receive.data.amount,
           this.receive.data.memo,
+          this.receive.unit,
           this.receive.lnurl && this.receive.lnurl.callback
         )
         .then(response => {
@@ -619,6 +624,15 @@ new Vue({
   created: function () {
     this.fetchBalance()
     this.fetchPayments()
+
+    LNbits.api
+      .request('GET', '/api/v1/currencies')
+      .then(response => {
+        this.receive.units = ['sat', ...response.data]
+      })
+      .catch(err => {
+        LNbits.utils.notifyApiError(err)
+      })
   },
   mounted: function () {
     // show disclaimer
diff --git a/lnbits/core/templates/core/wallet.html b/lnbits/core/templates/core/wallet.html
index b3f7b1c13..d127b6f9e 100644
--- a/lnbits/core/templates/core/wallet.html
+++ b/lnbits/core/templates/core/wallet.html
@@ -313,12 +313,21 @@
         <b>{{receive.lnurl.domain}}</b> is requesting an invoice:
       </p>
 
+      <q-select
+        filled
+        dense
+        v-model="receive.unit"
+        type="text"
+        label="Unit"
+        :options="receive.units"
+      ></q-select>
       <q-input
         filled
         dense
         v-model.number="receive.data.amount"
         type="number"
-        label="Amount (sat) *"
+        :label="`Amount (${receive.unit}) *`"
+        :step="receive.unit != 'sat' ? '0.001' : '1'"
         :min="receive.minMax[0]"
         :max="receive.minMax[1]"
         :readonly="receive.lnurl && receive.lnurl.fixed"
diff --git a/lnbits/core/views/api.py b/lnbits/core/views/api.py
index 9a81a1fe9..2318f2c8f 100644
--- a/lnbits/core/views/api.py
+++ b/lnbits/core/views/api.py
@@ -10,6 +10,7 @@ from typing import Dict, Union
 
 from lnbits import bolt11
 from lnbits.decorators import api_check_wallet_key, api_validate_post_request
+from lnbits.utils.exchange_rates import currencies, fiat_amount_as_satoshis
 
 from .. import core_app, db
 from ..crud import save_balance_check
@@ -47,13 +48,14 @@ async def api_payments():
 @api_check_wallet_key("invoice")
 @api_validate_post_request(
     schema={
-        "amount": {"type": "integer", "min": 1, "required": True},
+        "amount": {"type": "number", "min": 0.001, "required": True},
         "memo": {
             "type": "string",
             "empty": False,
             "required": True,
             "excludes": "description_hash",
         },
+        "unit": {"type": "string", "empty": False, "required": True},
         "description_hash": {
             "type": "string",
             "empty": False,
@@ -74,6 +76,13 @@ async def api_payments_create_invoice():
         description_hash = b""
         memo = g.data["memo"]
 
+    #convert fiat to satoshis
+    if g.data["unit"] != 'sat':
+        print(g.data["amount"])
+        price_in_sats = await fiat_amount_as_satoshis(g.data["amount"], g.data["unit"])
+        g.data["amount"] = price_in_sats
+        print(g.data["amount"], price_in_sats)
+
     async with db.connect() as conn:
         try:
             payment_hash, payment_request = await create_invoice(
@@ -435,3 +444,7 @@ async def api_perform_lnurlauth():
     if err:
         return jsonify({"reason": err.reason}), HTTPStatus.SERVICE_UNAVAILABLE
     return "", HTTPStatus.OK
+
+@core_app.route("/api/v1/currencies", methods=["GET"])
+async def api_list_currencies_available():
+    return jsonify(list(currencies.keys()))
diff --git a/lnbits/static/js/base.js b/lnbits/static/js/base.js
index b13ded462..cebd5cfc4 100644
--- a/lnbits/static/js/base.js
+++ b/lnbits/static/js/base.js
@@ -14,11 +14,18 @@ window.LNbits = {
         data: data
       })
     },
-    createInvoice: function (wallet, amount, memo, lnurlCallback = null) {
+    createInvoice: async function (
+      wallet,
+      amount,
+      memo,
+      unit = 'sat',
+      lnurlCallback = null
+    ) {
       return this.request('post', '/api/v1/payments', wallet.inkey, {
         out: false,
         amount: amount,
         memo: memo,
+        unit: unit,
         lnurl_callback: lnurlCallback
       })
     },