Fix 3.3 + 0.15 = 3.4499999999999997

api.py

@@ -1,6 +1,13 @@
 from fastapi import FastAPI, HTTPException
 from pydantic import BaseModel
 
+# Fix 3.3 + 0.15 = 3.4499999999999997
+from decimal import Decimal as d
+def fix_add(one, two):
+	return float(d(str(one)) + d(str(two)))
+def fix_sub(one, two):
+	return float(d(str(one)) - d(str(two)))
+
 from db import *
 
 app = FastAPI()
@@ -111,7 +118,7 @@ def coins_add(it: Coins_add):
 	token, id, amount = it.token, it.id, float(it.amount)
 	if token_check(token):
 		db = read()
-		db['id'][id]['bal'] += amount
+		db['id'][id]['bal'] = fix_add(db['id'][id]['bal'], amount)
 		write(db)
 		return 'OK'
 	else:
@@ -126,7 +133,7 @@ def coins_del(it: Coins_del):
 	token, id, amount = it.token, it.id, float(it.amount)
 	if token_check(token):
 		db = read()
-		db['id'][id]['bal'] -= amount
+		db['id'][id]['bal'] = fix_sub(db['id'][id]['bal'], amount)
 		write(db)
 		return 'OK'
 	else:
@@ -144,9 +151,10 @@ def coins_transfer(it: Coins_transfer):
 		db = read()
 		amount = abs(amount) # Защита от отриц. чисел
 		src_bal = db['id'][src_id]['bal']
-		if src_bal > amount and amount > 0.0001:
-			db['id'][src_id]['bal'] -= amount
-			db['id'][dst_id]['bal'] += amount
+		# Больше баланса и количество цифр после запятой <= 3
+		if src_bal >= amount and len(str(amount).split('.')[1]) <= 3: # and amount > 0.0001:
+			db['id'][src_id]['bal'] = fix_sub(db['id'][src_id]['bal'], amount)
+			db['id'][dst_id]['bal'] = fix_add(db['id'][dst_id]['bal'], amount)
 			write(db)
 			return 'OK'
 		else:
@@ -330,4 +338,4 @@ def get_passwd(it: Get_passwd):
 
 if __name__ == '__main__':
 	import uvicorn
-	uvicorn.run(app, host='127.0.0.1', port=7001)
+	uvicorn.run(app, host='0.0.0.0', port=7001)