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15 commits

Author SHA1 Message Date
Ross Nicoll bc8cca4896 Merge AuxPoW support from Namecore
Changes are as below:

Wrap CBlockHeader::nVersion into a new class (CBlockVersion).  This allows to take care of interpreting the field into a base version, auxpow flag and the chain ID.

Update getauxblock.py for new 'generate' RPC call.

Add 'auxpow' to block JSON.

Accept auxpow as PoW verification.

Add unit tests for auxpow verification.

Add check for memory-layout of CBlockVersion.

Weaken auxpow chain ID checks for the testnet.

Allow Params() to overrule when to check the auxpow chain ID and for legacy blocks.  Use this to disable the checks on testnet.

Introduce CPureBlockHeader.

Split the block header part that is used by auxpow and the "real" block header (that uses auxpow) to resolve the cyclic dependency between the two.

Differentiate between uint256 and arith_uint256.

This change was done upstream, modify the auxpow code.

Add missing lock in auxpow_tests.

Fix REST header check for auxpow headers.

Those can be longer, thus take that into account.  Also perform the check actually on an auxpow header.

Correctly set the coinbase for getauxblock results.

Call IncrementExtraNonce in getauxblock so that the coinbase is actually initialised with the stuff it should be.  (BIP30 block height and COINBASE_FLAGS.)

Implement getauxblock plus regression test.

Turn auxpow test into FIXTURE test.

This allows using of the Params() calls.

Move CMerkleTx code to auxpow.cpp.

Otherwise we get linker errors when building without wallet.

Fix rebase with BIP66.

Update the code to handle BIP66's nVersion=3.

Enforce that auxpow parent blocks have no auxpow block version.

This is for compatibility with namecoind.  See also https://github.com/namecoin/namecoin/pull/199.

Move auxpow-related parameters to Consensus::Params.
2018-09-19 19:22:45 +01:00
Karl-Johan Alm b7b48c8bbd Refactor: Remove using namespace <xxx> from src/*.cpp. 2017-01-27 18:13:20 +09:00
Gregory Maxwell 997a98a674 Replace FindLatestBefore used by importmuti with FindEarliestAtLeast.
In spite of the name FindLatestBefore used std::lower_bound to try
 to find the earliest block with a nTime greater or equal to the
 the requested value.  But lower_bound uses bisection and requires
 the input to be ordered with respect to the comparison operation.
 Block times are not well ordered.

I don't know what lower_bound is permitted to do when the data
 is not sufficiently ordered, but it's probably not good.
 (I could construct an implementation which would infinite loop...)

To resolve the issue this commit introduces a maximum-so-far to the
 block indexes and searches that.

For clarity the function is renamed to reflect what it actually does.

An issue that remains is that there is no grace period in importmulti:
 If a address is created at time T and a send is immediately broadcast
 and included by a miner with a slow clock there may not yet have been
 any block with at least time T.

The normal rescan has a grace period of 7200 seconds, but importmulti
 does not.
2017-01-12 14:21:43 +00:00
isle2983 27765b6403 Increment MIT Licence copyright header year on files modified in 2016
Edited via:

$ contrib/devtools/copyright_header.py update .
2016-12-31 11:01:21 -07:00
Pedro Branco cb08fdbf78 Add importmulti rpc call 2016-10-19 15:17:13 +01:00
Wladimir J. van der Laan 84c13e759d chain: Add assertion in case of missing records in index db 2016-04-27 11:11:36 +02:00
Jorge Timón e86756193e MOVEONLY: non-consensus: from pow to chain:
- GetBlockProof
- GetBlockProofEquivalentTime
2016-01-12 13:43:14 +01:00
Suhas Daftuar 50262d8953 Allow block announcements with headers
This replaces using inv messages to announce new blocks, when a peer requests
(via the new "sendheaders" message) that blocks be announced with headers
instead of inv's.

Since headers-first was introduced, peers send getheaders messages in response
to an inv, which requires generating a block locator that is large compared to
the size of the header being requested, and requires an extra round-trip before
a reorg can be relayed.  Save time by tracking headers that a peer is likely to
know about, and send a headers chain that would connect to a peer's known
headers, unless the chain would be too big, in which case we revert to sending
an inv instead.

Based off of @sipa's commit to announce all blocks in a reorg via inv,
which has been squashed into this commit.

Rebased-by: Pieter Wuille
2015-11-29 11:59:23 +01:00
Pieter Wuille dce8360e44 Reduce checkpoints' effect on consensus.
Instead of only checking height to decide whether to disable script checks,
actually check whether a block is an ancestor of a checkpoint, up to which
headers have been validated. This means that we don't have to prevent
accepting a side branch anymore - it will be safe, just less fast to
do.

We still need to prevent being fed a multitude of low-difficulty headers
filling up our memory. The mechanism for that is unchanged for now: once
a checkpoint is reached with headers, no headers chain branching off before
that point are allowed anymore.
2015-05-13 12:52:57 -07:00
sandakersmann f914f1a746
Added "Core" to copyright headers
Github-Pull: #5494
Rebased-From: 15de949bb9277e442302bdd8dee299a8d6deee60
2014-12-19 19:55:32 +01:00
Pieter Wuille 5ea3bc06d5 Move remaining CBlockIndex methods to chain.cpp 2014-12-11 17:39:10 +01:00
Michael Ford 2fdc3351d7 Update comments in chain to be doxygen compatible 2014-10-25 16:46:54 +08:00
21E14 b7ae2c172a Chain::SetTip return type to void 2014-10-20 17:56:19 -04:00
Philip Kaufmann 7bec6dd230 cleanup license and header end comment in chain.cpp/.h 2014-09-29 08:22:03 +02:00
jtimon e8b5f0d549 Move CBlockIndex, CChain and related code out of main 2014-09-08 22:17:19 +02:00