{"functions": ["function_proposal", "function_delete_proposal", "function_snippet_clear", "function_snippet", "function_vote", "function_delete_vote"], "snippet": "def function_snippet(info, args):\n    assert args['f'] == 'function_snippet'\n    sender = info['sender']\n    addr = handle_lookup(sender)\n    snippet = args['a'][0]\n    snippet_digest = hashlib.sha256(snippet.encode('utf8')).hexdigest()\n    existing, _ = get('function', 'snippet', None, snippet_digest)\n    if existing:\n        # Already published (content-addressed by digest); keep its bindings.\n        return\n    put(addr, 'function', 'snippet', {\n        'snippet': snippet,\n        'functions': []\n        }, snippet_digest)\n    event('NewFunctionSnippet', [snippet_digest])\n\n\ndef function_snippet_clear(info, args):\n    assert args['f'] == 'function_snippet_clear'\n    snippet_digest = args['a'][0]\n    snippet, snippet_owner = get('function', 'snippet', None, snippet_digest)\n    assert snippet, \"Snippet not found: %s\" % snippet_digest\n    assert snippet['functions'] == [], \"Snippet is not empty: %s\" % snippet\n    put(snippet_owner, 'function', 'snippet', None, snippet_digest)\n    event('RemoveFunctionSnippet', [snippet_digest])\n\n\ndef function_proposal(info, args):\n    assert args['f'] == 'function_proposal'\n    sender = info['sender']\n    addr = handle_lookup(sender)\n    func_names = args['a'][0]\n    snippet_digests = args['a'][1]\n    for func_name in func_names:\n        assert set(func_name) <= set(string.ascii_lowercase+string.digits+'_')\n        assert not func_name.startswith('_')\n\n    snippet_digests = args['a'][1]\n    for snippet_digest in snippet_digests:\n        assert set(snippet_digest) <= set(string.ascii_lowercase+string.digits)\n        assert len(snippet_digest) == 64\n\n    proposal_id, _ = get('function', 'proposal_count', 0)\n    proposal_id += 1\n    put(addr, 'function', 'proposal_count', proposal_id)\n\n    put(addr, 'function', 'proposal', {\n            'functions': func_names,\n            'snippets': snippet_digests,\n            'votes': []\n        }, '%s' % (proposal_id))\n    event('FunctionProposal', [proposal_id, func_names])\n\n\ndef function_vote(info, args):\n    assert args['f'] == 'function_vote'\n    sender = info['sender']\n    addr = handle_lookup(sender)\n    committee_members, _ = get('committee', 'members', [])\n    committee_members = set(committee_members)\n    assert addr in committee_members\n\n    proposal_id = args['a'][0]\n    proposal, _ = get('function', 'proposal', None, '%s' % proposal_id)\n    assert proposal\n    votes = set(proposal['votes'])\n    votes.add(addr)\n    proposal['votes'] = list(votes)\n\n    # print(len(votes), len(committee_members), len(committee_members)*2//3)\n    if len(votes) >= len(committee_members)*2//3:\n        assert len(proposal['snippets']) > 0\n        for snippet_hash in proposal['snippets']:\n            assert set(snippet_hash) <= set(string.ascii_lowercase+string.digits)\n            snippet, snippet_owner = get('function', 'snippet', None, snippet_hash)\n            assert snippet, \"Snippet not found: %s\" % snippet_hash\n            functions = snippet['functions']\n            functions.extend(proposal['functions'])\n            snippet['functions'] = list(set(functions))\n            put(snippet_owner, 'function', 'snippet', snippet, snippet_hash)\n\n        assert len(proposal['functions']) > 0\n        for func_name in proposal['functions']:\n            # Unbind the function from any snippet it was previously bound to\n            # (other than the ones in this proposal). This leaves the old\n            # snippet empty so it can be safely cleared later instead of\n            # occupying global state forever.\n            old_code, _ = get('function', 'code', None, func_name)\n            if old_code:\n                for old_hash in old_code.get('snippets', []):\n                    if old_hash in proposal['snippets']:\n                        continue\n                    old_snippet, old_snippet_owner = get('function', 'snippet', None, old_hash)\n                    if not old_snippet:\n                        continue\n                    functions = old_snippet['functions']\n                    if func_name in functions:\n                        functions.remove(func_name)\n                    old_snippet['functions'] = functions\n                    put(old_snippet_owner, 'function', 'snippet', old_snippet, old_hash)\n\n            put(addr, 'function', 'code', {\n                'snippets': proposal['snippets']\n            }, func_name)\n\n        event('NewFunctions', [proposal_id, proposal['functions']])\n        funcs_reload(proposal['functions'])\n    else:\n        put(addr, 'function', 'proposal', proposal, '%s' % proposal_id)\n        event('FunctionVote', [proposal_id, addr])\n\n\ndef function_delete_proposal(info, args):\n    assert args['f'] == 'function_delete_proposal'\n    sender = info['sender']\n    addr = handle_lookup(sender)\n    func_names = args['a'][0]\n    for func_name in func_names:\n        assert set(func_name) <= set(string.ascii_lowercase+string.digits+'_')\n        assert not func_name.startswith('_')\n        code, _ = get('function', 'code', None, func_name)\n        assert code, \"Function not found: %s\" % func_name\n\n    proposal_id, _ = get('function', 'delete_proposal_count', 0)\n    proposal_id += 1\n    put(addr, 'function', 'delete_proposal_count', proposal_id)\n\n    put(addr, 'function', 'delete_proposal', {\n            'functions': func_names,\n            'votes': []\n        }, '%s' % (proposal_id))\n    event('FunctionDeleteProposal', [proposal_id, func_names])\n\n\ndef function_delete_vote(info, args):\n    assert args['f'] == 'function_delete_vote'\n    sender = info['sender']\n    addr = handle_lookup(sender)\n    committee_members, _ = get('committee', 'members', [])\n    committee_members = set(committee_members)\n    assert addr in committee_members\n\n    proposal_id = args['a'][0]\n    proposal, _ = get('function', 'delete_proposal', None, '%s' % proposal_id)\n    assert proposal\n    votes = set(proposal['votes'])\n    votes.add(addr)\n    proposal['votes'] = list(votes)\n\n    if len(votes) >= len(committee_members)*2//3:\n        assert len(proposal['functions']) > 0\n        for func_name in proposal['functions']:\n            code, _ = get('function', 'code', None, func_name)\n            if code:\n                for snippet_hash in code.get('snippets', []):\n                    snippet, snippet_owner = get('function', 'snippet', None, snippet_hash)\n                    if not snippet:\n                        continue\n                    functions = snippet['functions']\n                    if func_name in functions:\n                        functions.remove(func_name)\n                    snippet['functions'] = functions\n                    if functions:\n                        put(snippet_owner, 'function', 'snippet', snippet, snippet_hash)\n                    else:\n                        put(snippet_owner, 'function', 'snippet', None, snippet_hash)\n                        event('RemoveFunctionSnippet', [snippet_hash])\n            put(addr, 'function', 'code', None, func_name)\n\n        event('RemoveFunctions', [proposal_id, proposal['functions']])\n        funcs_reload(proposal['functions'])\n    else:\n        put(addr, 'function', 'delete_proposal', proposal, '%s' % proposal_id)\n        event('FunctionDeleteVote', [proposal_id, addr])\n\n"}