TON Blockchain MCP

import codecs from base64 import b64encode from hashlib import sha256 as hasher def sha256(x): if not isinstance(x, bytes): x = codecs.encode(x, 'utf-8') h = hasher() h.update(x) return h.digest() def str_b64encode(s): return b64encode(s.encode('utf-8')).decode('utf-8') if s and isinstance(s, str) else None def bytes_b64encode(s): return None if s is None else b64encode(s).decode('utf-8')