Commit Graph

749 Commits

Author SHA1 Message Date
Jeffrey Wilcke
5b283663b4 core: Added new TD strategy which mitigate the risk for selfish mining
Assuming the following scenario where a miner has 15% of all hashing
power and the ability to exert a moderate control over the network to
the point where if the attacker sees a message A, it can't stop A from
propagating, but what it **can** do is send a message B and ensure that
most nodes see B before A. The attacker can then selfish mine and
augment selfish mining strategy by giving his own blocks an advantage.

This change makes the time at which a block is received less relevant
and so the level of control an attacker has over the network no longer
makes a difference.

This change changes the current td algorithm `B_td > C_td` to the new
algorithm `B_td > C_td || B_td == C_td && rnd < 0.5`.
2016-02-18 10:12:13 +01:00
Jeffrey Wilcke
b6d88a0e9f core, core/vm, crypto: fixes for homestead
* Removed some strange code that didn't apply state reverting properly
* Refactored code setting from vm & state transition to the executioner
* Updated tests
2016-02-18 10:11:48 +01:00
Gustav Simonsson
371871d685 parmas, crypto, core, core/vm: homestead consensus protocol changes
* change gas cost for contract creating txs
* invalidate signature with s value greater than secp256k1 N / 2
* OOG contract creation if not enough gas to store code
* new difficulty adjustment algorithm
* new DELEGATECALL op code
2016-02-18 10:08:11 +01:00
Jeffrey Wilcke
987c1a595a eth/filters: pending logs
Pending logs are now filterable through the Go API. Filter API changed
such that each filter type has it's own bucket and adding filter
explicitly requires you specify the bucket to put it in.
2016-02-13 13:14:02 +01:00
Jeffrey Wilcke
6cace73bea core/vm/runtime: simplified runtime calling mechanism
Implemented `runtime.Call` which uses - unlike Execute - the given state
for the execution and the address of the contract you wish to execute.
Unlike `Execute`, `Call` requires a config.
2016-02-11 10:17:16 +01:00
Péter Szilágyi
a50bccc642 Merge pull request #2134 from karalabe/save-state-writes
core/state, trie: don't leak database writes before commit
2016-02-03 10:56:21 +02:00
Péter Szilágyi
a8fd0de0d3 Merge pull request #2156 from ppratscher/add_replay_tx
core/vm, rpc/api: added debug_replayTransaction RPC call
2016-02-03 10:34:52 +02:00
Peter Pratscher
15780ead07 core/vm, rpc/api: renamed to debug.replayTransaction, migrated to new RPC, integrated feedback
Integrated code review suggestions

Integrated last review comments
2016-02-02 15:20:18 +01:00
Péter Szilágyi
d3642b0715 core, eth, rpc/api: rpc method to inspect the txpool queue 2016-02-01 14:58:14 +02:00
Péter Szilágyi
a2dc074b1d core, core/types, miner: fix transaction nonce-price combo sort 2016-01-22 12:33:34 +02:00
Jeffrey Wilcke
78f1964095 Merge pull request #2115 from karalabe/vm-debug-storage
core/vm: resolve circular dependency to debug vm storage
2016-01-20 22:18:19 +01:00
Péter Szilágyi
f3d4ce0d16 core/state, ethdb, trie: test intermediate secure key leak, fix memdb bug 2016-01-20 16:06:28 +02:00
Péter Szilágyi
886478b18b core/state, trie: don't leak database writes before commit 2016-01-20 12:09:24 +02:00
Péter Szilágyi
2d5d6d9d0e core/state: always commit in batches, just finish if not needed later 2016-01-13 12:04:03 +02:00
Péter Szilágyi
752c75fb21 core/vm: resolve circular dependency to debug vm storage 2016-01-11 18:21:39 +02:00
Péter Szilágyi
e5b480b638 core: fix invalid state reuse in chain maker based tests 2016-01-11 16:53:06 +02:00
Jeffrey Wilcke
32226f1b0c Merge pull request #2097 from karalabe/block-state-checks
core, eth/downloader: ensure state presence in ancestor lookup
2016-01-05 12:26:38 +01:00
Péter Szilágyi
649787a9bf core: fix transaction reorg issues within the tx pool 2016-01-05 11:22:59 +02:00
Péter Szilágyi
9e011ff1cd core, eth/downloader: ensure state presence in ancestor lookup 2016-01-04 16:27:23 +02:00
Felix Lange
e6fb69296e common: remove old RLP implementation, Value and ExtPackage
In order to make this happen, kill all remaining trivial uses of
common/{rlp,value}.go. The non-trivial ones have been updated earlier.
2015-12-18 12:09:10 +01:00
Felix Lange
1b89bd5d26 core/state, core/types use package rlp for state, receipt serialisation 2015-12-18 12:09:10 +01:00
Felix Lange
9be5d5cd90 eth/downloader: fix negative balance issue in tests
The test chain generated by makeChainFork included invalid uncle
headers, crashing the generator during the state commit.

The headers were invalid because they used the iteration counter as the
block number, even though makeChainFork uses a block with number > 0 as
the parent. Fix this by introducing BlockGen.Number, which allows
accessing the actual number of the block being generated.
2015-12-18 12:09:10 +01:00
zsfelfoldi
975c591261 core: tx pool skip price validation for "owned" transactions 2015-12-16 03:21:17 +01:00
Felix Lange
fa187a366d Merge pull request #2035 from bas-vk/rcp-v2-rebase
rpc: new RPC implementation with pub/sub support
2015-12-14 17:38:10 +01:00
Bas van Kervel
eae81465c1 rpc: new RPC implementation with pub/sub support 2015-12-14 16:34:05 +01:00
Péter Szilágyi
1cecda8333 core: write individual transactions and receipts too on fast sync 2015-12-04 15:30:59 +02:00
Jeffrey Wilcke
9901a40f04 core: added a new RemovedLogEvent
When a chain reorganisation occurs we collect the logs that were deleted
during the chain reorganisation. The removed logs are posted to the
event mux indicating that those were deleted during the reorg.
2015-12-01 12:12:30 +01:00
Péter Szilágyi
1e806c4c77 cmd, common, core, eth, node, rpc, tests, whisper, xeth: use protocol stacks 2015-11-27 11:06:12 +02:00
Péter Szilágyi
e86e0ecdc8 core, eth, miner, xeth: clean up tx/receipt db accessors 2015-11-19 16:03:32 +02:00
Jeffrey Wilcke
ae37a8013d Merge pull request #1917 from obscuren/validator-interface
core, eth, rpc: split out block validator and state processor
2015-11-19 10:57:00 +01:00
Jeffrey Wilcke
1372b991c3 core/vm/runtime: added simple execution runtime
The runtime environment can be used for simple basic execution of
contract code without the requirement of setting up a full stack and
operates fully in memory.
2015-11-18 16:50:20 +01:00
Jeffrey Wilcke
a1d9ef48c5 core, eth, rpc: split out block validator and state processor
This removes the burden on a single object to take care of all
validation and state processing. Now instead the validation is done by
the `core.BlockValidator` (`types.Validator`) that takes care of both
header and uncle validation through the `ValidateBlock` method and state
validation through the `ValidateState` method. The state processing is
done by a new object `core.StateProcessor` (`types.Processor`) and
accepts a new state as input and uses that to process the given block's
transactions (and uncles for rewords) to calculate the state root for
the next block (P_n + 1).
2015-11-18 14:24:42 +01:00
Péter Szilágyi
667987e7d0 core: only reset head header/fastblock if stale 2015-10-28 17:40:24 +02:00
Péter Szilágyi
28c7b54d68 core: fix #1921, decode all receipt field, not just consensus 2015-10-22 13:09:30 +03:00
Jeffrey Wilcke
58d0752fdd Merge pull request #1883 from obscuren/jit-vm-optimisations
core/vm: JIT segmentation
2015-10-21 12:34:32 -07:00
Jeffrey Wilcke
0467a6ceec Merge pull request #1889 from karalabe/fast-sync-rebase
eth/63 fast synchronization algorithm
2015-10-21 11:44:22 -07:00
Péter Szilágyi
5b0ee8ec30 core, eth, trie: fix data races and merge/review issues 2015-10-21 16:49:55 +03:00
Jeffrey Wilcke
80f26086ee core, tests: get_hash fix
Make sure that we're fetching the hash from the current chain and not
the canonical chain.
2015-10-21 02:31:46 +02:00
Péter Szilágyi
a9d8dfc8e7 core, eth: roll back uncertain headers in failed fast syncs 2015-10-19 10:03:10 +03:00
Péter Szilágyi
b97e34a8e4 eth/downloader: concurrent receipt and state processing 2015-10-19 10:03:10 +03:00
Péter Szilágyi
ab27bee25a core, eth, trie: direct state trie synchronization 2015-10-19 10:03:09 +03:00
Péter Szilágyi
832b37c822 core, eth: receipt chain reconstruction 2015-10-19 10:03:09 +03:00
Péter Szilágyi
42c8afd440 core: differentiate receipt concensus and storage decoding 2015-10-19 10:03:09 +03:00
Péter Szilágyi
b99fe27f8b core: fix block canonical mark / content write race 2015-10-19 10:03:09 +03:00
Péter Szilágyi
f186b39018 eth/downloader: add fast and light sync strategies 2015-10-19 10:03:09 +03:00
Péter Szilágyi
c33cc382b3 core: support inserting pure header chains 2015-10-19 10:03:09 +03:00
Felix Lange
de8d5aaa92 core, core/state: move gas tracking out of core/state
The amount of gas available for tx execution was tracked in the
StateObject representing the coinbase account. This commit makes the gas
counter a separate type in package core, which avoids unintended
consequences of intertwining the counter with state logic.
2015-10-17 10:24:34 +02:00
Jeffrey Wilcke
8c85532412 core/vm: added parsing utilities 2015-10-16 22:30:42 +02:00
Jeffrey Wilcke
b196278044 core/vm: added JIT segmenting / optimisations
* multi-push segments
* static jumps segments
2015-10-16 22:30:42 +02:00
Jeffrey Wilcke
9d61d78de6 core/vm: abstracted instruction execution away from JIT
Moved the execution of instructions to the instruction it self. This
will allow for specialised instructions (e.g. segments) to be execution
in the same manner as regular instructions.
2015-10-16 22:17:35 +02:00