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https://github.com/alexgo-io/stacks-puppet-node.git
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206 lines
6.3 KiB
Python
206 lines
6.3 KiB
Python
#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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"""
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Blockstack
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~~~~~
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copyright: (c) 2014-2015 by Halfmoon Labs, Inc.
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copyright: (c) 2016 by Blockstack.org
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This file is part of Blockstack
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Blockstack is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Blockstack is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Blockstack. If not, see <http://www.gnu.org/licenses/>.
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"""
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from ..b40 import *
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from ..config import *
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from ..hashing import *
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from ..scripts import *
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from ..nameset import *
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from binascii import hexlify, unhexlify
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import blockstack_client
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from blockstack_client.operations import *
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import virtualchain
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log = virtualchain.get_logger("blockstack-server")
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from namespacereveal import FIELDS as NAMESPACE_REVEAL_FIELDS
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# consensus hash fields (ORDER MATTERS!)
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FIELDS = NAMESPACE_REVEAL_FIELDS[:] + [
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'ready_block', # block number at which the namespace was readied
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]
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# fields this operation changes
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MUTATE_FIELDS = NAMEREC_MUTATE_FIELDS[:] + [
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'ready_block',
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'sender'
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]
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# fields to back up when applying this operation
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BACKUP_FIELDS = NAMESPACE_REVEAL_FIELDS + MUTATE_FIELDS
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@state_transition("namespace_id", "namespaces")
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def check( state_engine, nameop, block_id, checked_ops ):
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"""
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Verify the validity of a NAMESPACE_READY operation.
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It is only valid if it has been imported by the same sender as
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the corresponding NAMESPACE_REVEAL, and the namespace is still
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in the process of being imported.
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"""
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namespace_id = nameop['namespace_id']
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sender = nameop['sender']
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# must have been revealed
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if not state_engine.is_namespace_revealed( namespace_id ):
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log.debug("Namespace '%s' is not revealed" % namespace_id )
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return False
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# must have been sent by the same person who revealed it
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revealed_namespace = state_engine.get_namespace_reveal( namespace_id )
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if revealed_namespace['recipient'] != sender:
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log.debug("Namespace '%s' is not owned by '%s' (but by %s)" % (namespace_id, sender, revealed_namespace['recipient']))
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return False
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# can't be ready yet
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if state_engine.is_namespace_ready( namespace_id ):
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# namespace already exists
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log.debug("Namespace '%s' is already registered" % namespace_id )
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return False
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# preserve from revealed
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nameop['sender_pubkey'] = revealed_namespace['sender_pubkey']
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nameop['address'] = revealed_namespace['address']
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# can commit imported nameops
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return True
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def tx_extract( payload, senders, inputs, outputs, block_id, vtxindex, txid ):
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"""
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Extract and return a dict of fields from the underlying blockchain transaction data
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that are useful to this operation.
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Required (+ parse):
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sender: the script_pubkey (as a hex string) of the principal that sent the name preorder transaction
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address: the address from the sender script
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Optional:
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sender_pubkey_hex: the public key of the sender
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"""
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sender_script = None
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sender_address = None
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sender_pubkey_hex = None
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try:
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# by construction, the first input comes from the principal
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# who sent the registration transaction...
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assert len(senders) > 0
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assert 'script_pubkey' in senders[0].keys()
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assert 'addresses' in senders[0].keys()
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sender_script = str(senders[0]['script_pubkey'])
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sender_address = str(senders[0]['addresses'][0])
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assert sender_script is not None
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assert sender_address is not None
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if str(senders[0]['script_type']) == 'pubkeyhash':
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sender_pubkey_hex = get_public_key_hex_from_tx( inputs, sender_address )
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except Exception, e:
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log.exception(e)
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raise Exception("Failed to extract")
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parsed_payload = parse( payload )
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assert parsed_payload is not None
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ret = {
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"sender": sender_script,
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"address": sender_address,
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"ready_block": block_id,
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"vtxindex": vtxindex,
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"txid": txid,
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"op": NAMESPACE_READY
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}
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ret.update( parsed_payload )
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if sender_pubkey_hex is not None:
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ret['sender_pubkey'] = sender_pubkey_hex
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return ret
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def parse( bin_payload ):
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"""
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NOTE: the first three bytes will be missing
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NOTE: the first byte in bin_payload is a '.'
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"""
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if len(bin_payload) == 0:
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log.error("empty namespace")
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return None
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if bin_payload[0] != '.':
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log.error("Missing namespace delimiter '.'")
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return None
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namespace_id = bin_payload[ 1: ]
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# sanity check
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if not is_b40( namespace_id ) or "+" in namespace_id or namespace_id.count(".") > 0:
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log.error("Invalid namespace ID '%s'" % namespace_id)
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return None
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if len(namespace_id) <= 0 or len(namespace_id) > LENGTHS['blockchain_id_namespace_id']:
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log.error("Invalid namespace of length %s" % len(namespace_id))
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return None
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return {
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'opcode': 'NAMESPACE_READY',
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'namespace_id': namespace_id
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}
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def restore_delta( name_rec, block_number, history_index, working_db, untrusted_db ):
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"""
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Find the fields in a name record that were changed by an instance of this operation, at the
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given (block_number, history_index) point in time in the past. The history_index is the
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index into the list of changes for this name record in the given block.
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Return the fields that were modified on success.
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Return None on error.
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"""
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name_rec_script = build_namespace_ready( str(name_rec['namespace_id']) )
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name_rec_payload = unhexlify( name_rec_script )[3:]
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ret_op = parse( name_rec_payload )
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return ret_op
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def snv_consensus_extras( name_rec, block_id, blockchain_name_data, db ):
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"""
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Calculate any derived missing data that goes into the check() operation,
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given the block number, the name record at the block number, and the db.
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"""
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return blockstack_client.operations.namespaceready.snv_consensus_extras( name_rec, block_id, blockchain_name_data )
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'''
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return {}
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'''
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