Beispiel #1
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 def __init__(self, net):
     forest.Tracker.__init__(self, delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
         work=lambda share: dash_data.target_to_average_attempts(share.target),
         min_work=lambda share: dash_data.target_to_average_attempts(share.max_target),
     )))
     self.net = net
     self.verified = forest.SubsetTracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
         work=lambda share: dash_data.target_to_average_attempts(share.target),
     )), subset_of=self)
     self.get_cumulative_weights = WeightsSkipList(self)
Beispiel #2
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 def __init__(self, net):
     forest.Tracker.__init__(self, delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
         work=lambda share: dash_data.target_to_average_attempts(share.target),
         min_work=lambda share: dash_data.target_to_average_attempts(share.max_target),
     )))
     self.net = net
     self.verified = forest.SubsetTracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
         work=lambda share: dash_data.target_to_average_attempts(share.target),
     )), subset_of=self)
     self.get_cumulative_weights = WeightsSkipList(self)
Beispiel #3
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def get_stale_counts(tracker, share_hash, lookbehind, rates=False):
    res = {}
    for share in tracker.get_chain(share_hash, lookbehind - 1):
        res['good'] = res.get('good', 0) + dash_data.target_to_average_attempts(share.target)
        s = share.share_data['stale_info']
        if s is not None:
            res[s] = res.get(s, 0) + dash_data.target_to_average_attempts(share.target)
    if rates:
        dt = tracker.items[share_hash].timestamp - tracker.items[tracker.get_nth_parent_hash(share_hash, lookbehind - 1)].timestamp
        res = dict((k, v/dt) for k, v in res.iteritems())
    return res
Beispiel #4
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def get_stale_counts(tracker, share_hash, lookbehind, rates=False):
    res = {}
    for share in tracker.get_chain(share_hash, lookbehind - 1):
        res['good'] = res.get('good', 0) + dash_data.target_to_average_attempts(share.target)
        s = share.share_data['stale_info']
        if s is not None:
            res[s] = res.get(s, 0) + dash_data.target_to_average_attempts(share.target)
    if rates:
        dt = tracker.items[share_hash].timestamp - tracker.items[tracker.get_nth_parent_hash(share_hash, lookbehind - 1)].timestamp
        res = dict((k, v/dt) for k, v in res.iteritems())
    return res
Beispiel #5
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def get_desired_version_counts(tracker, best_share_hash, dist):
    res = {}
    for share in tracker.get_chain(best_share_hash, dist):
        res[share.desired_version] = res.get(
            share.desired_version, 0) + dash_data.target_to_average_attempts(
                share.target)
    return res
Beispiel #6
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 def get_delta(self, element):
     from p2pool.dash import data as dash_data
     share = self.tracker.items[element]
     att = dash_data.target_to_average_attempts(share.target)
     return 1, {
         share.new_script: att * (65535 - share.share_data['donation'])
     }, att * 65535, att * share.share_data['donation']
Beispiel #7
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def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net):
    weights, total_weight, donation_weight = tracker.get_cumulative_weights(
        best_share_hash,
        min(tracker.get_height(best_share_hash),
            net.REAL_CHAIN_LENGTH), 65535 * net.SPREAD *
        dash_data.target_to_average_attempts(block_target))
    res = dict((script, subsidy * weight // total_weight)
               for script, weight in weights.iteritems())
    res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(
        res.itervalues())
    return res
Beispiel #8
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def get_desired_version_counts(tracker, best_share_hash, dist):
    res = {}
    for share in tracker.get_chain(best_share_hash, dist):
        res[share.desired_version] = res.get(share.desired_version, 0) + dash_data.target_to_average_attempts(share.target)
    return res
Beispiel #9
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def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net):
    weights, total_weight, donation_weight = tracker.get_cumulative_weights(best_share_hash, min(tracker.get_height(best_share_hash), net.REAL_CHAIN_LENGTH), 65535*net.SPREAD*dash_data.target_to_average_attempts(block_target))
    res = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems())
    res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(res.itervalues())
    return res
Beispiel #10
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 def get_delta(self, element):
     from p2pool.dash import data as dash_data
     share = self.tracker.items[element]
     att = dash_data.target_to_average_attempts(share.target)
     return 1, {share.new_script: att*(65535-share.share_data['donation'])}, att*65535, att*share.share_data['donation']
Beispiel #11
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    def generate_transaction(cls, tracker, share_data, block_target, desired_timestamp, desired_target, ref_merkle_link, desired_other_transaction_hashes_and_fees, net, known_txs=None, last_txout_nonce=0, base_subsidy=None):
        previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
        
        height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
        assert height >= net.REAL_CHAIN_LENGTH or last is None
        if height < net.TARGET_LOOKBEHIND:
            pre_target3 = net.MAX_TARGET
        else:
            attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
            pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
            pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
            pre_target3 = math.clip(pre_target2, (net.MIN_TARGET, net.MAX_TARGET))
        max_bits = dash_data.FloatingInteger.from_target_upper_bound(pre_target3)
        bits = dash_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//30, pre_target3)))
        
        new_transaction_hashes = []
        new_transaction_size = 0
        transaction_hash_refs = []
        other_transaction_hashes = []
        
        past_shares = list(tracker.get_chain(share_data['previous_share_hash'], min(height, 100)))
        tx_hash_to_this = {}
        for i, share in enumerate(past_shares):
            for j, tx_hash in enumerate(share.new_transaction_hashes):
                if tx_hash not in tx_hash_to_this:
                    tx_hash_to_this[tx_hash] = [1+i, j] # share_count, tx_count
        for tx_hash, fee in desired_other_transaction_hashes_and_fees:
            if tx_hash in tx_hash_to_this:
                this = tx_hash_to_this[tx_hash]
            else:
                if known_txs is not None:
                    this_size = dash_data.tx_type.packed_size(known_txs[tx_hash])
                    #if new_transaction_size + this_size > 50000: # only allow 50 kB of new txns/share
                    #    break
                    new_transaction_size += this_size
                new_transaction_hashes.append(tx_hash)
                this = [0, len(new_transaction_hashes)-1]
            transaction_hash_refs.extend(this)
            other_transaction_hashes.append(tx_hash)
        
        included_transactions = set(other_transaction_hashes)
        removed_fees = [fee for tx_hash, fee in desired_other_transaction_hashes_and_fees if tx_hash not in included_transactions]
        definite_fees = sum(0 if fee is None else fee for tx_hash, fee in desired_other_transaction_hashes_and_fees if tx_hash in included_transactions)
        if None not in removed_fees:
            share_data = dict(share_data, subsidy=share_data['subsidy'] - sum(removed_fees))
        else:
            assert base_subsidy is not None
            share_data = dict(share_data, subsidy=base_subsidy + definite_fees)
        
        weights, total_weight, donation_weight = tracker.get_cumulative_weights(previous_share.share_data['previous_share_hash'] if previous_share is not None else None,
            max(0, min(height, net.REAL_CHAIN_LENGTH) - 1),
            65535*net.SPREAD*dash_data.target_to_average_attempts(block_target),
        )
        assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
        
        worker_payout = share_data['subsidy']
        
        payments = share_data['packed_payments']
        payments_tx = []
        if payments is not None:
            for obj in payments:
                pm_script = dash_data.address_to_script2(obj['payee'],net.PARENT)
                pm_payout = obj['amount']
                if pm_payout > 0:
                    payments_tx += [dict(value=pm_payout, script=pm_script)]
                    worker_payout -= pm_payout

        amounts = dict((script, worker_payout*(49*weight)//(50*total_weight)) for script, weight in weights.iteritems()) # 98% goes according to weights prior to this share
        this_script = dash_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
        amounts[this_script] = amounts.get(this_script, 0) + worker_payout//50 # 2% goes to block finder
        amounts[DONATION_SCRIPT] = amounts.get(DONATION_SCRIPT, 0) + worker_payout - sum(amounts.itervalues()) # all that's left over is the donation weight and some extra satoshis due to rounding
        
        if sum(amounts.itervalues()) != worker_payout or any(x < 0 for x in amounts.itervalues()):
            raise ValueError()
        
        worker_scripts = sorted([k for k in amounts.iterkeys() if k != DONATION_SCRIPT])
        worker_tx=[dict(value=amounts[script], script=script) for script in worker_scripts if amounts[script]]
        
        donation_tx = [dict(value=amounts[DONATION_SCRIPT], script=DONATION_SCRIPT)]
        
        share_info = dict(
            share_data=share_data,
            far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
            max_bits=max_bits,
            bits=bits,
            timestamp=math.clip(desired_timestamp, (
                (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
                (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
            )) if previous_share is not None else desired_timestamp,
            new_transaction_hashes=new_transaction_hashes,
            transaction_hash_refs=transaction_hash_refs,
            absheight=((previous_share.absheight if previous_share is not None else 0) + 1) % 2**32,
            abswork=((previous_share.abswork if previous_share is not None else 0) + dash_data.target_to_average_attempts(bits.target)) % 2**128,
        )
        
        gentx = dict(
            version=1,
            tx_ins=[dict(
                previous_output=None,
                sequence=None,
                script=share_data['coinbase'],
            )],
            tx_outs=worker_tx + payments_tx + donation_tx + [dict(
                value=0,
                script='\x6a\x28' + cls.get_ref_hash(net, share_info, ref_merkle_link) + pack.IntType(64).pack(last_txout_nonce),
            )],
            lock_time=0,
        )
        
        def get_share(header, last_txout_nonce=last_txout_nonce):
            min_header = dict(header); del min_header['merkle_root']
            share = cls(net, None, dict(
                min_header=min_header,
                share_info=share_info,
                ref_merkle_link=dict(branch=[], index=0),
                last_txout_nonce=last_txout_nonce,
                hash_link=prefix_to_hash_link(dash_data.tx_type.pack(gentx)[:-32-8-4], cls.gentx_before_refhash),
                merkle_link=dash_data.calculate_merkle_link([None] + other_transaction_hashes, 0),
            ))
            assert share.header == header # checks merkle_root
            return share
        
        return share_info, gentx, other_transaction_hashes, get_share
Beispiel #12
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    def generate_transaction(cls,
                             tracker,
                             share_data,
                             block_target,
                             desired_timestamp,
                             desired_target,
                             ref_merkle_link,
                             desired_other_transaction_hashes_and_fees,
                             net,
                             known_txs=None,
                             last_txout_nonce=0,
                             base_subsidy=None):
        previous_share = tracker.items[
            share_data['previous_share_hash']] if share_data[
                'previous_share_hash'] is not None else None

        height, last = tracker.get_height_and_last(
            share_data['previous_share_hash'])
        assert height >= net.REAL_CHAIN_LENGTH or last is None
        if height < net.TARGET_LOOKBEHIND:
            pre_target3 = net.MAX_TARGET
        else:
            attempts_per_second = get_pool_attempts_per_second(
                tracker,
                share_data['previous_share_hash'],
                net.TARGET_LOOKBEHIND,
                min_work=True,
                integer=True)
            pre_target = 2**256 // (
                net.SHARE_PERIOD *
                attempts_per_second) - 1 if attempts_per_second else 2**256 - 1
            pre_target2 = math.clip(pre_target,
                                    (previous_share.max_target * 9 // 10,
                                     previous_share.max_target * 11 // 10))
            pre_target3 = math.clip(pre_target2,
                                    (net.MIN_TARGET, net.MAX_TARGET))
        max_bits = dash_data.FloatingInteger.from_target_upper_bound(
            pre_target3)
        bits = dash_data.FloatingInteger.from_target_upper_bound(
            math.clip(desired_target, (pre_target3 // 30, pre_target3)))

        new_transaction_hashes = []
        new_transaction_size = 0
        transaction_hash_refs = []
        other_transaction_hashes = []

        past_shares = list(
            tracker.get_chain(share_data['previous_share_hash'],
                              min(height, 100)))
        tx_hash_to_this = {}
        for i, share in enumerate(past_shares):
            for j, tx_hash in enumerate(share.new_transaction_hashes):
                if tx_hash not in tx_hash_to_this:
                    tx_hash_to_this[tx_hash] = [1 + i,
                                                j]  # share_count, tx_count
        for tx_hash, fee in desired_other_transaction_hashes_and_fees:
            if tx_hash in tx_hash_to_this:
                this = tx_hash_to_this[tx_hash]
            else:
                if known_txs is not None:
                    this_size = dash_data.tx_type.packed_size(
                        known_txs[tx_hash])
                    #if new_transaction_size + this_size > 50000: # only allow 50 kB of new txns/share
                    #    break
                    new_transaction_size += this_size
                new_transaction_hashes.append(tx_hash)
                this = [0, len(new_transaction_hashes) - 1]
            transaction_hash_refs.extend(this)
            other_transaction_hashes.append(tx_hash)

        included_transactions = set(other_transaction_hashes)
        removed_fees = [
            fee for tx_hash, fee in desired_other_transaction_hashes_and_fees
            if tx_hash not in included_transactions
        ]
        definite_fees = sum(
            0 if fee is None else fee
            for tx_hash, fee in desired_other_transaction_hashes_and_fees
            if tx_hash in included_transactions)
        if None not in removed_fees:
            share_data = dict(share_data,
                              subsidy=share_data['subsidy'] -
                              sum(removed_fees))
        else:
            assert base_subsidy is not None
            share_data = dict(share_data, subsidy=base_subsidy + definite_fees)

        weights, total_weight, donation_weight = tracker.get_cumulative_weights(
            previous_share.share_data['previous_share_hash']
            if previous_share is not None else None,
            max(0,
                min(height, net.REAL_CHAIN_LENGTH) - 1),
            65535 * net.SPREAD *
            dash_data.target_to_average_attempts(block_target),
        )
        assert total_weight == sum(weights.itervalues()) + donation_weight, (
            total_weight, sum(weights.itervalues()) + donation_weight)

        worker_payout = share_data['subsidy']

        payments = share_data['packed_payments']
        payments_tx = []
        if payments is not None:
            for obj in payments:
                pm_script = dash_data.address_to_script2(
                    obj['payee'], net.PARENT)
                pm_payout = obj['amount']
                if pm_payout > 0:
                    payments_tx += [dict(value=pm_payout, script=pm_script)]
                    worker_payout -= pm_payout

        amounts = dict(
            (script, worker_payout * (49 * weight) // (50 * total_weight))
            for script, weight in weights.iteritems(
            ))  # 98% goes according to weights prior to this share
        this_script = dash_data.pubkey_hash_to_script2(
            share_data['pubkey_hash'])
        amounts[this_script] = amounts.get(
            this_script, 0) + worker_payout // 50  # 2% goes to block finder
        amounts[DONATION_SCRIPT] = amounts.get(
            DONATION_SCRIPT, 0
        ) + worker_payout - sum(
            amounts.itervalues()
        )  # all that's left over is the donation weight and some extra satoshis due to rounding

        if sum(amounts.itervalues()) != worker_payout or any(
                x < 0 for x in amounts.itervalues()):
            raise ValueError()

        worker_scripts = sorted(
            [k for k in amounts.iterkeys() if k != DONATION_SCRIPT])
        worker_tx = [
            dict(value=amounts[script], script=script)
            for script in worker_scripts if amounts[script]
        ]

        donation_tx = [
            dict(value=amounts[DONATION_SCRIPT], script=DONATION_SCRIPT)
        ]

        share_info = dict(
            share_data=share_data,
            far_share_hash=None if last is None and height < 99 else
            tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
            max_bits=max_bits,
            bits=bits,
            timestamp=math.clip(
                desired_timestamp,
                (
                    (previous_share.timestamp + net.SHARE_PERIOD) -
                    (net.SHARE_PERIOD - 1),  # = previous_share.timestamp + 1
                    (previous_share.timestamp + net.SHARE_PERIOD) +
                    (net.SHARE_PERIOD - 1),
                )) if previous_share is not None else desired_timestamp,
            new_transaction_hashes=new_transaction_hashes,
            transaction_hash_refs=transaction_hash_refs,
            absheight=((previous_share.absheight
                        if previous_share is not None else 0) + 1) % 2**32,
            abswork=(
                (previous_share.abswork if previous_share is not None else 0) +
                dash_data.target_to_average_attempts(bits.target)) % 2**128,
        )

        gentx = dict(
            version=1,
            tx_ins=[
                dict(
                    previous_output=None,
                    sequence=None,
                    script=share_data['coinbase'],
                )
            ],
            tx_outs=worker_tx + payments_tx + donation_tx + [
                dict(
                    value=0,
                    script='\x6a\x28' +
                    cls.get_ref_hash(net, share_info, ref_merkle_link) +
                    pack.IntType(64).pack(last_txout_nonce),
                )
            ],
            lock_time=0,
        )

        def get_share(header, last_txout_nonce=last_txout_nonce):
            min_header = dict(header)
            del min_header['merkle_root']
            share = cls(
                net, None,
                dict(
                    min_header=min_header,
                    share_info=share_info,
                    ref_merkle_link=dict(branch=[], index=0),
                    last_txout_nonce=last_txout_nonce,
                    hash_link=prefix_to_hash_link(
                        dash_data.tx_type.pack(gentx)[:-32 - 8 - 4],
                        cls.gentx_before_refhash),
                    merkle_link=dash_data.calculate_merkle_link(
                        [None] + other_transaction_hashes, 0),
                ))
            assert share.header == header  # checks merkle_root
            return share

        return share_info, gentx, other_transaction_hashes, get_share